Find Cheap Flights from Seattle/Tacoma Intl to Denver International (SEA - DEN)

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Sat 18/11
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Good to Know

Low Season:
October
Best time to beat the crowds
3%
expected price decrease
High Season:
July
Most popular time to fly
11%
expected price increase
Average price:
C$ 282
(avg. price over the last 2 weeks)
Good Deal:
C$ 195
or less (round trip)

When to Book Flights from Seattle/Tacoma Intl to Denver International

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

When looking for a cheap flight, consider that 25% of our users selected a flight on this route for C$ 195 or less.
The cheapest flight from Seattle/Tacoma Intl to Denver International was found, on average, 72 days before departure.
Book at least 2 weeks before departure in order to get a below-average price.
High season is considered to be June, July and August. The cheapest month to fly is October.
Morning departure is around 21% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Seattle/Tacoma Intl to Denver International Flights

How long does a flight from Seattle/Tacoma Intl to Denver International take?
An average nonstop flight takes 2h 38m, covering a distance of 1645 km.
How many flights are there between Seattle/Tacoma Intl and Denver International?
There are 675 (nonstop) flights between Seattle/Tacoma Intl and Denver International per week, averaging 98 per day.
Which airlines provide the cheapest flights from Seattle/Tacoma Intl to Denver International?
In the past 3 days, the cheapest round-trip tickets were found on Frontier (C$ 101), Multiple Airlines (C$ 114) and Delta (C$ 175).
Do I need a passport to fly between Seattle/Tacoma Intl and Denver International?
No.
Which airlines fly most frequently between Seattle/Tacoma Intl and Denver International?
Alaska Airlines (17 times daily), United (14 times daily), Delta (13 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly from Seattle/Tacoma Intl to Denver International?
For Seattle/Tacoma Intl to Denver International, Tuesday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Denver International back to Seattle/Tacoma Intl, the best deals are generally found on Thursday, with Wednesday being the most expensive.

Book cheap flights from Seattle/Tacoma Intl to Denver International (round-trip)

Airports
Origin
Seattle
C$ 101
only
C$ 101
Destination
Denver
C$ 101
only
C$ 101
Tue, 9 Jan
SEA
DEN
2h 38m
Fri, 12 Jan
DEN
SEA
3h 07m
C$ 101
Trip: 4 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 459 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
DEN
Mediocre 2.0

Nothing

It was a total shit-show. Only one person to check people in the counter. No kiosks were working on my way back. On the way there very few were working, I did it once, paid for my one bag, and it printed blank. There were no available workers to help me, so I switched to another kiosk and had to again, pay for my bag. On the way back we landed and had to wait 30 minutes to get to the gate. It was a horrible experience in all.

SEA
DEN
Mediocre 2.3

Not much

Cost of bags, not understanding person in terminal during boarding, plane seats; I keep saying we will NOT Frontier again. I must have been desperate.

SEA
DEN
Mediocre 2.6

hmm

layover nothing was in order staff sucked yall kept moving gate yall could at lest give us a soda for the long rides

SEA
DEN
Mediocre 3.3

Good connection, timely departure, pleasant crew

Budget airline ended up being much more expensive than my usual airlines. $40 per bag per leg of the trip, including carry-on?! My wife and I each had one carry on bag (normally free). Since we had a connection each direction that's $40 x 2 (people) x 4 flights = $320. That's ridiculous. Furthermore, these were the worst seating conditions on any airline I've ever seen (and I fly plenty). There is no headrest - the seats barely make it to my shoulders. And the seats themselves have no cushion whatsoever. The tray tables are laughably miniscule - much smaller than my laptop. There is no free snack/beverage or in-flight entertainment. There is no wifi. I will stick to United or Delta in the future.

SEA
DEN
Mediocre 2.0

Nothing positive

I wasn't allowed to board because they closed the flight. I didn't realize you have to pay an additional fee to get your seat assignement to even get on the flight. I've been delayed a full 24hrs. That on top of $40 fee to have my carry on. At this point, my $175 plane ticket has ballooned to almost $245 which is more expensive than other flights where they treat you like a human being. F this company.

Thu, 30 Nov
SEA
DEN
2h 53m
Mon, 4 Dec
DEN
SEA
3h 07m
C$ 114
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Fri, 9 Feb
SEA
DEN
2h 42m
Sun, 11 Feb
DEN
SEA
2h 59m
C$ 175
Trip: 3 days
8.5ExcellentShow reviews
Overall 8.5 Excellent
Based on 10 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
SEA
DEN
Good 6.3

I love the new snack choices! Way to go Delta for offering Kind bars now!! This is awesome.

Tiny old plane, props blocked my window view, no entertainment system.

SEA
DEN
Excellent 8.0

free texting and entertainment!

our flight was delayed half an hour.

YUL
ATL
Good 6.0

Fligth were on time

My flight from Montreal to Atlanta was 2:30 min Left at 6:10 arrive at 8:30 roughly Tried twice to get to my connection earlier and get 9:30 instead of 12:09 fligth to Daytona Delta was not flexible to allow me to book saying i did not have 55 min in between fligth which i had than lear n it will cost $75.00 to change the fligth - What? Very disappointed of Delta - lost 3 hrs at the airport today

SAN
SEA
Okay 4.6

Trying too hard to fit as many as possible

LAX
GUA
Mediocre 2.0

Nothing worst flight I've ever had.

Everything Delta was so poor quality!!! The flight attendants were not helpful.

Fri, 1 Dec
SEA
DEN
2h 44m
Mon, 4 Dec
DEN
SEA
3h 07m
C$ 114
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Mon, 2 Apr
SEA
DEN
2h 43m
Fri, 6 Apr
DEN
SEA
2h 58m
C$ 200
Trip: 5 days
8.5ExcellentShow reviews
Overall 8.5 Excellent
Based on 10 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
YUL
ATL
Good 6.0

Fligth were on time

My flight from Montreal to Atlanta was 2:30 min Left at 6:10 arrive at 8:30 roughly Tried twice to get to my connection earlier and get 9:30 instead of 12:09 fligth to Daytona Delta was not flexible to allow me to book saying i did not have 55 min in between fligth which i had than lear n it will cost $75.00 to change the fligth - What? Very disappointed of Delta - lost 3 hrs at the airport today

SEA
DEN
Excellent 10.0

The staff of the flight were very friendly and attentive. They were great!

LAX
GUA
Mediocre 2.0

Nothing worst flight I've ever had.

Everything Delta was so poor quality!!! The flight attendants were not helpful.

LGA
CVG
Excellent 8.3

Plane was far too tight. Very uncomfortable for taller individuals.

SEA
DEN
Good 6.0

Seats were uncomfortable

Sat, 18 Nov
SEA
DEN
2h 39m
Sun, 26 Nov
DEN
SEA
4h 45m
C$ 370
Trip: 9 days
8.5ExcellentShow reviews
Overall 8.5 Excellent
Based on 10 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
ATL
SNA
Excellent 8.0

4 hour flight. Non-eventful except slight turbulence. Good to be home! Thank you!

NA

YUL
ATL
Good 6.0

Fligth were on time

My flight from Montreal to Atlanta was 2:30 min Left at 6:10 arrive at 8:30 roughly Tried twice to get to my connection earlier and get 9:30 instead of 12:09 fligth to Daytona Delta was not flexible to allow me to book saying i did not have 55 min in between fligth which i had than lear n it will cost $75.00 to change the fligth - What? Very disappointed of Delta - lost 3 hrs at the airport today

SEA
DEN
Excellent 10.0

The staff of the flight were very friendly and attentive. They were great!

LGA
CVG
Excellent 8.3

Plane was far too tight. Very uncomfortable for taller individuals.

SEA
DEN
Excellent 8.0

free texting and entertainment!

our flight was delayed half an hour.

Tue, 21 Nov
SEA
DEN
2h 54m
Sat, 25 Nov
DEN
SEA
4h 45m
C$ 380
Trip: 5 days
8.5ExcellentShow reviews
Overall 8.5 Excellent
Based on 10 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
SEA
DEN
Excellent 10.0

The staff of the flight were very friendly and attentive. They were great!

ATL
SNA
Excellent 8.0

4 hour flight. Non-eventful except slight turbulence. Good to be home! Thank you!

NA

LAX
GUA
Mediocre 2.0

Nothing worst flight I've ever had.

Everything Delta was so poor quality!!! The flight attendants were not helpful.

DTW
EWR
Excellent 8.0

Boarding was quick. Staff and crew were friendly. Everything went well despite the 30 min delay we had on the runway. They gave us snacks and we ended up still arriving on time.

SEA
DEN
Okay 5.5

I've only experienced delayed flights with Delta ... and this was no exception. It wasn't weather-related, nor a late flight delivering a plane - just no ground crew to service the plane between flights.

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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.