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SEA - DEN

C$ 66 Find cheap flights from Seattle to Denver

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Denver departing on 6/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sat 25/5
Sat 1/6

Search hundreds of travel sites at once for deals on flights to Denver

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Denver, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Denver, as well as popular online travel agencies
In the last 7 days, travellers have searched 44,979,812 times on KAYAK, and here is why:

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Cheap flight deals from Seattle to Denver (SEA-DEN)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Denver that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
8:14 p.m. - 12:15 a.m.SEA-DEN
3h 01mdirect
5:01 a.m. - 7:04 a.m.DEN-SEA
3h 03mdirect
C$ 94Frontier
Find Deal
Tue, 21 May - Wed, 22 May
10:08 p.m. - 1:51 a.m.SEA-DEN
2h 43mdirect
7:08 p.m. - 9:11 p.m.DEN-SEA
3h 03mdirect
C$ 105Frontier
Find Deal
Sat, 24 Aug - Wed, 28 Aug
7:55 p.m. - 11:37 p.m.SEA-DEN
2h 42mdirect
6:05 a.m. - 8:05 a.m.DEN-SEA
3h 00mdirect
C$ 216Delta
Find Deal
Tue, 11 Jun - Sun, 16 Jun
8:11 a.m. - 11:58 a.m.SEA-DEN
2h 47mdirect
5:37 p.m. - 9:54 p.m.DEN-SEA
5h 17m1 stop
C$ 230Alaska Airlines
Find Deal
Sat, 8 Jun - Mon, 10 Jun
7:55 p.m. - 11:37 p.m.SEA-DEN
2h 42mdirect
7:55 p.m. - 10:01 p.m.DEN-SEA
3h 06mdirect
C$ 242Delta
Find Deal
Wed, 12 Jun - Fri, 21 Jun
9:35 a.m. - 4:37 p.m.SEA-DEN
6h 02m1 stop
5:37 p.m. - 9:54 p.m.DEN-SEA
5h 17m1 stop
C$ 271Alaska Airlines
Find Deal
Thu, 30 May - Tue, 4 Jun
7:30 p.m. - 11:10 p.m.SEA-DEN
2h 40mdirect
3:45 p.m. - 9:35 p.m.DEN-SEA
6h 50m2 stops
C$ 379Southwest
Find Deal
Mon, 20 May - Tue, 21 May
7:00 a.m. - 4:39 p.m.SEA-DEN
8h 39m1 stop
6:00 a.m. - 11:42 a.m.DEN-SEA
6h 42m1 stop
C$ 412United Airlines
Find Deal
Thu, 17 Oct - Tue, 22 Oct
5:10 p.m. - 12:20 a.m.SEA-DEN
6h 10m1 stop
3:45 p.m. - 9:35 p.m.DEN-SEA
6h 50m2 stops
C$ 453Southwest
Find Deal
Mon, 20 May - Tue, 21 May
1:10 p.m. - 9:32 p.m.SEA-DEN
7h 22m1 stop
7:25 p.m. - 10:15 p.m.DEN-SEA
27h 50m2 stops
C$ 469United Airlines
Find Deal
Tue, 21 May - Tue, 28 May

Flights from Seattle to Denver - Travel Insights & Trends

Get data-powered insights and trends into flights from Seattle to Denver to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Seattle to Denver?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Seattle to Denver, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Seattle to Denver is January, where tickets cost C$ 216 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is C$ 406 and C$ 387 respectively.

How far in advance should I book a flight from Seattle to Denver?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Seattle to Denver, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Seattle to Denver, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 34 days before departure.

Which airlines provide the cheapest flights from Seattle to Denver?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 3 days, Frontier offered the best one-way deal for that route, at C$ 66. KAYAK users also found Seattle to Denver round-trip flights on Frontier from C$ 94 and on Delta from C$ 216.

Which airlines fly direct between Seattle and Denver?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Seattle to Denver.
There are 5 airlines that fly direct from Seattle to Denver. They are: Alaska Airlines, Delta, Frontier, Southwest and United Airlines. The cheapest price of all airlines flying this route was found with Frontier at C$ 66. On average, the best prices for this route can be found at Frontier.

How many flights are there between Seattle and Denver per day?

Each day, there are between 25 and 32 nonstop flights that take off from Seattle and land in Denver, with an average flight time of 2h 45m. The most common departure time is 5:00 a.m. and most flights take off in the morning. Each week, there are 209 flights. The most frequent day of departure is Saturday, when 15% of all weekly flights depart. The fewest flights depart on a Tuesday.

Which cabin class options are there for flights between Seattle and Denver?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There are 3 cabin class options for the route. These are Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from Seattle to Denver take?

A direct flight to Denver will take on average 2h 39m to travel the 2,646 km flying distance from Seattle.

What’s the earliest departure time from Seattle to Denver?

Early birds can take the earliest flight from Seattle at 5:00 am and will be landing in Denver at 8:44 am.

What’s the latest departure time from Seattle to Denver?

If you prefer to fly at night, the latest flight from Seattle to Denver jets off at 10:34 pm and lands at 2:21 am.

Good to know

Low season

January

High season

July

Cheapest flight

C$ 66
Best time to beat the crowds (28% less expensive on average)
Most popular time to fly (30% more expensive on average)
Flight from Seattle to Denver

When to book flights from Seattle to Denver

Are your dates flexible? Find out the best times to travel from Seattle to Denver based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Denver

  • Is there anywhere to smoke at Seattle-Tacoma International Airport?

    While smoking is not allowed inside any of the terminals at Seattle-Tacoma International Airport, there are two locations outside where you may smoke. The first is near the north end of the baggage claim level, and the second is across from the small parking lot. To determine if you are allowed to smoke, look for ashtrays and double check that there are no airport signs prohibiting it.

  • What is there to do while waiting at Seattle-Tacoma International Airport?

    In addition to periodic live music performances, Seattle-Tacoma International Airport also has a diverse Art Walk that is 0.5 mi long and begins near Gate A 14. There are also several Digiboo self-service kiosks located throughout the airport that allow travelers to download movies and televisions shows directly onto their portable devices.

  • Are there any amenities for pets at Denver International Airport?

    There are several pet relief zones located in the centers of Terminals A, B, and C at Denver International Airport and they provide pet owners with waste disposal bags, trashcans, and running water. Additionally, there is a Paradise 4 Paws Pet Resort adjacent to the main terminal that offers both pet boarding and grooming services.

  • Where can I grab a meal at Denver International Airport?

    Boulder Beer Tap House is located in the Jeppesen Terminal of Denver International Airport and serves a selection of burgers, appetizers, and salads, while Cantina Grill is located nearby and has a Mexican-inspired menu. The Denver Chophouse is located near the A Gates and is known for its vegan and gluten-free meals.

  • What is the cheapest flight from Seattle to Denver?

    In the last 3 days, the lowest price for a flight from Seattle to Denver was C$ 48 for a one-way ticket and C$ 69 for a round-trip.

  • Which airlines offer Wi-Fi service onboard planes from Seattle to Denver?

    Alaska Airlines, Delta, American Airlines, Aeromexico, and JetBlue offer inflight Wi-Fi service on the Seattle to Denver flight route.

  • Which aircraft models fly most regularly from Seattle to Denver?

    The Boeing 737-900 is the aircraft model that flies most regularly on the Seattle to Denver flight route.

  • Which airline alliances offer flights from Seattle to Denver?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Seattle and Denver, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Seattle to Denver?

    There are direct flights from Seattle to Denver on a daily basis.

  • Which is the best airline for flights from Seattle to Denver, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Seattle to Denver are Alaska Airlines and Delta. With an average price for the route of C$ 263 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of C$ 241 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Seattle to Denver?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Denver.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Denver?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Denver?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Denver with an airline and back to Seattle with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Denver?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Denver from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from Seattle to Denver

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 97 or less one-way and C$ 157 or less round-trip.
  • For travelers looking for non-stop flights from Seattle to Denver, book your reservation with either United, Delta, or Frontier Airlines, as each of these companies offers many flights without layovers. If you would like some extra perks, look into flying with Southwest Airlines, as they provide free checked baggage and snacks.
  • If you’re trying to find a way to pass the time before boarding your flight from Seattle to Denver, purchase an entry ticket for the Club at SEA in Seattle-Tacoma International Airport (SEA). This lounge is open to customers of all airlines and provides guests with snacks, magazines, televisions, and games.
  • Have a question about the airport or need help finding a specific service? Look for the Airport Volunteers stationed throughout Seattle-Tacoma International Airport in bright blue jackets. These volunteers can help you find your gate, recommend dining options, and tell you about the airport’s various amenities.
  • If you are feeling sore after being cooped up in a plane for several hours, consider getting a quick massage at A Massage in Denver International Airport (DEN). With two locations near the A and B Gates, this massage parlor is a quick and convenient way to let go of any tension and stress.
  • For those that are traveling with a small child, take note of the fact that there are private nursing rooms located in each terminal of Denver International Airport. These rooms contain seating, outlets, changing tables, and sinks, and they are free to access.
See more tips

Prefer to fly non-stop from Seattle to Denver?

Find which airlines fly direct from Seattle/Tacoma Intl to Denver Intl, which days they fly and book direct flights.

Nonstop departures

Seattle/Tacoma Intl to Denver Intl

Monday

ANA,Air France,Air Tahiti Nui, +16 more

ANA,Air France, +17 more

Tuesday

ANA,Air France,Air Tahiti Nui, +17 more

ANA,Air France, +18 more

Wednesday

ANA,Air Tahiti Nui,Alaska Airlines, +16 more

ANA,Air Tahiti Nui, +17 more

Thursday

ANA,Air France,Air Tahiti Nui, +17 more

ANA,Air France, +18 more

Friday

ANA,Air Tahiti Nui,Alaska Airlines, +16 more

ANA,Air Tahiti Nui, +17 more

Saturday

ANA,Air France,Air Tahiti Nui, +17 more

ANA,Air France, +18 more

Sunday

ANA,Air France,Air Tahiti Nui, +17 more

ANA,Air France, +18 more

See more nonstop flights

Nonstop returns

Denver Intl to Seattle/Tacoma Intl

Monday

ANA,Air France,Air Tahiti Nui, +16 more

ANA,Air France, +17 more

Tuesday

ANA,Air France,Air Tahiti Nui, +17 more

ANA,Air France, +18 more

Wednesday

ANA,Air France,Air Tahiti Nui, +15 more

ANA,Air France, +16 more

Thursday

ANA,Air France,Air Tahiti Nui, +16 more

ANA,Air France, +17 more

Friday

ANA,Air France,Air Tahiti Nui, +16 more

ANA,Air France, +17 more

Saturday

ANA,Air France,Air Tahiti Nui, +16 more

ANA,Air France, +17 more

Sunday

ANA,Air France,Air Tahiti Nui, +17 more

ANA,Air France, +18 more

See more nonstop flights
See more nonstop flights

Top 4 airlines serving from Seattle to Denver

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Denver. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Denver? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 9114 reviews
7.9comfort
8.2boarding
8.6crew
7.3food
7.3entertainment
Airline reviews

Flight was good. Glad it was delayed or I may have missed the connection since I got to Seattle at about the same time my connection was to leave. The snack was a small bag of pretzels and a small soda. Can’t really call that food. There was no entertainment available on the flight.

8.0 ExcellentAnonymous, Apr. 2024SEA - TUS
Read more about Alaska Airlines reviews

Flight was good. Glad it was delayed or I may have missed the connection since I got to Seattle at about the same time my connection was to leave. The snack was a small bag of pretzels and a small soda. Can’t really call that food. There was no entertainment available on the flight.

Same as the earlier flight. Bad boarding practices, uncomfortable seats, and no Wi-Fi service.

Everything was good. One of the flight attendants was not very friendly

Text and wifi were paywalled. I'm not looking for something fast, but not getting a text for ride coordination until back at the gate was a pain.

It was not a great flight. There was a software update delay which had us on the ground for almost 2 hours. I was unable to make my shuttle to my final destination.

Good. Quiet. Comfortable. The protests nearly kept me from catching my flight. They waited for me! I made it!

Red eye flight, so not expecting any extras, but the boarding and trip was smooth. Thx Alaska.

Received little assistance with air sick child. Crew’s main concern was if anything got on the seat belt!

Flight was excellent! Comfortable seats. Flew out of IND. very friendly crew!

It was fine… Just overbooked every seat was taken and very bumpy nothing they could do about that. Overall I like to fly Alaska airlines

I'm a larger, athletic guy (6'2", 260lbs powerlifter) and I found the seats incredibly uncomfortable with minimal leg room, especially in a window seat. Now, I full understand that being smaller may change my view but even if I was 80lbs less, my legs would be the same size and I was sandwiched between my seat and the seat in front of me.

Had a broken tray in business class. Crew just shrugged it off.

Everything was great except for the seat. The backrest would not stay in the upright position.

public website still broken for years randomly blocking browsers with privacy options active after loading a page maybe once. check-in on laptop was almost impossible but eventually randomly worked. had to print pass at airport since couldn't get back in to load digital pass on mobile firefox or chrome. red eye flight so smooth onboarding, plenty of room to spread out, easy offboarding. onboard wifi instructions mention vpn can cause problems connecting but fails to also mention private dns. no printed or built in menu list, seems weird to require personal device to point at qr code link for menu which does not even allow direct ordering. people with health condition risk related dietary restrictions trying to avoid for example cholesterol and sugar are left guessing what they can order either way without nutritional info highlights (cranberry juice was minute maid cocktail with as much suger as typical can of soda). tap to pay wasn't working and always seems sketchy to manually enter card info. good movie variety, so limited tv was okay.

The helpful attitude of the staff, and being a wheelchair passenger everyone was helpful and understanding. The trip was made comfortable by the upgraded seat which was given without my request, that was a great surprise. Thank you Delta.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Mi primera conexión se retrasó por lo cual perdí mi segunda conexión la cual salió adelantada

Crew was not friendly when I went to request a seat change.

There were choices for the snacks. Good choices and tasty lunch and breakfast as well.

Positive: Entertainment via phone on the short was great and my first time. Good food and wine and head phones for free. Negative: Seat hardly reclined on the long flight. Breakfast was an egg with a bun. No egg choices and rather have something sweet like bun/jam and Youghurt.

They did get us booked on a later flight, but it made us miss our connecting flight. So, we had to stay and another state overnight with no luggage or clothes. Because they kept our luggage at airport for next flight on the next day.

Flight was on time. Staff were friendly. I paid for Economy Plus but was required to check my standard carry-on luggage due to lack of space on the aircraft. This cost me 30 minutes, unexpectedly, in waiting at the baggage claim. This experience did not meet my expectations.

Crew is way too many times on the intercom re explaining the same thing

Amazing comfortable chairs great snacks super friendly staff pilots did excellent job. Smooth sailing all the way. Definitely be flying United more.

We waited too long to get water while the plane was on the Tarmac awaiting de-icing.

The plane was delayed coming in and on the tarmac. I was coming from another flight so it made for a very long day. The stewardess kept trying to slam the overhead bins closed and I was worried that she had damaged my new luggage. They ran out of snacks and lccdsddd me a hummus box which was nice. It took them a very long time to pick up the garbage so I could not go to the washroom and had little time. To prepare for disbarment. The TV system was hard to control from the armrest and picture wasn’t clear. The crew did apologize several times for the lateness. It took the Denver airport an unusually long time to de-ice the plane.

By in large it was a good experience. The flight crew was great and that's the most important to me. Boarding was fine.

It was fine. Everything ran on time, crew was great.

Staff friendly and app worked really well. Modest delays were frustrating

There were 3 leg for the trip and each leg was delayed by 90 minutes or more. The boarding process takes forever with people waiting on the jetway even though most folks do not have carry-on. The whole process is poorly managed.

Not have to pay for every single item to take a flight. Seating and delays sucked.

Terrible. Seats are bad and the baggage policy is inconsistent

Everything was good, and most importantly on time. They have been extremely tardy in some of my flights

They lost my baggage on my connection flight, it’s been 24 hours since I put my claim in and still no update on my bags.

It’s a cheap airline. I wish they had better seats.

The only issues had were outside of Frontier’s control or weren’t expected. It was a two hour flight they completed fast. We landed almost an hour ahead of schedule. The issues with no entertainment or food weren’t issues since there was no expectations. The issue of the loud or crying babies was outside of frontiers control.

Seats are cramped and very uncomfortable. You have to pay for everything and it is too expensive.

Smooth process and flight. My favorite kind. Uneventful and on-time!

Xmas Day- Flights were on time for departure and arrival, baggage check in and boarding process were hassle free, baggage also arrived without any delay. Satisfied customer on this journey.

Book cheap flights from Seattle to Denver

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Seattle to Denver found on KAYAK in the last 72 hours.
6/5Mon
directFrontier
2h 47mSEA-DEN
C$ 66
15/5Wed
directDelta
2h 54mSEA-DEN
C$ 122
6/5Mon
1 stopFrontier
11h 09mSEA-DEN
C$ 130
29/5Wed
1 stopAlaska Airlines
6h 52mSEA-DEN
C$ 135
16/5Thu
1 stopAlaska Airlines
6h 02mSEA-DEN
C$ 148
24/7Wed
directDelta
2h 42mSEA-DEN
C$ 149
22/6Sat
directDelta
2h 42mSEA-DEN
C$ 163
7/5Tue
directDelta
2h 48mSEA-DEN
C$ 176
5/6Wed
2 stopsUnited Airlines
14h 21mSEA-DEN
C$ 326
30/5Thu
1 stopUnited Airlines
21h 50mSEA-DEN
C$ 327

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Last minute flights from Seattle to Denver

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Seattle to Denver that are departing in the next 10 days.
29/4Mon
directFrontier
2h 48mSEA-DEN
30/4Tue
multi-stopFrontier
10h 56mDEN-SEA
C$ 256
27/4Sat
directFrontier
2h 47mSEA-DEN
30/4Tue
multi-stopFrontier
10h 56mDEN-SEA
C$ 259
29/4Mon
directFrontier
2h 48mSEA-DEN
30/4Tue
directFrontier
3h 10mDEN-SEA
C$ 282
27/4Sat
directFrontier
2h 47mSEA-DEN
30/4Tue
directFrontier
3h 10mDEN-SEA
C$ 285
26/4Fri
directAlaska Airlines
2h 41mSEA-DEN
2/5Thu
directAlaska Airlines
2h 57mDEN-SEA
C$ 379
27/4Sat
multi-stopDelta
7h 35mSEA-DEN
19/5Sun
directDelta
3h 03mDEN-SEA
C$ 386
27/4Sat
multi-stopAlaska Airlines
7h 13mSEA-DEN
1/5Wed
directAlaska Airlines
2h 54mDEN-SEA
C$ 391
27/4Sat
directDelta
2h 40mSEA-DEN
28/4Sun
directDelta
3h 13mDEN-SEA
C$ 406
27/4Sat
multi-stopUnited Airlines
7h 20mSEA-DEN
28/4Sun
multi-stopUnited Airlines
8h 26mDEN-SEA
C$ 432
29/4Mon
multi-stopUnited Airlines
7h 56mSEA-DEN
30/4Tue
multi-stopUnited Airlines
6h 43mDEN-SEA
C$ 885

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Seattle - Denver Flights

Departure:

Seattle (SEA)United States

Destination:

Denver (DEN)United States

Return flight deals:

Denver - Seattle

Cabin classes:

C$ 3,652
C$ 90

Browse origins:

  • Flights » 
  • Seattle

Browse destinations:

  • Flights » 
  • Worldwide » 
  • Denver