BUF - SEA

C$ 161 Find Cheap Flights from Buffalo to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Buffalo to Seattle departing on 25/10. 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
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Buffalo to Seattle, 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 Buffalo to Seattle, as well as popular online travel agencies
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Buffalo to Seattle (BUF-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Buffalo to Seattle 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Buffalo to Seattle

Tue, 13 Jan - Tue, 20 Jan
Southwest Logo
6:20 a.m. - 1:15 p.m.BUF-SEA
9h 55m1 stop
Southwest Logo
6:45 a.m. - 4:15 p.m.SEA-BUF
6h 30m1 stop
C$ 290Southwest
Find Deal
Wed, 12 Nov - Mon, 17 Nov
Southwest Logo
2:05 p.m. - 10:30 p.m.BUF-SEA
11h 25m1 stop
Southwest Logo
7:05 a.m. - 10:40 p.m.SEA-BUF
12h 35m1 stop
C$ 320Southwest
Find Deal
Wed, 8 Oct - Wed, 15 Oct
American Airlines Logo
6:14 a.m. - 8:46 p.m.BUF-SEA
17h 32m1 stop
American Airlines Logo
5:22 a.m. - 4:52 p.m.SEA-BUF
8h 30m1 stop
C$ 323American Airlines
Find Deal
Thu, 30 Oct - Wed, 5 Nov
Southwest Logo
12:55 p.m. - 8:05 p.m.BUF-SEA
10h 10m1 stop
Southwest Logo
5:40 a.m. - 8:40 p.m.SEA-BUF
12h 00m2 stops
C$ 327Southwest
Find Deal
Tue, 13 Jan - Tue, 20 Jan
United Airlines Logo
2:49 p.m. - 10:43 p.m.BUF-SEA
10h 54m2 stops
United Airlines Logo
8:00 a.m. - 7:25 p.m.SEA-BUF
8h 25m1 stop
C$ 344United Airlines
Find Deal
Sat, 1 Nov - Mon, 3 Nov
Delta Logo
5:14 p.m. - 11:54 p.m.BUF-SEA
9h 40m1 stop
Delta Logo
11:10 p.m. - 11:01 a.m.SEA-BUF
8h 51m1 stop
C$ 345Delta
Find Deal
Wed, 12 Nov - Mon, 17 Nov
United Airlines Logo
10:37 a.m. - 6:52 p.m.BUF-SEA
11h 15m2 stops
United Airlines Logo
11:59 p.m. - 10:03 a.m.SEA-BUF
7h 04m1 stop
C$ 359United Airlines
Find Deal
Fri, 14 Nov - Mon, 17 Nov
Southwest Logo
4:55 p.m. - 12:05 a.m.BUF-SEA
10h 10m1 stop
Southwest Logo
7:05 a.m. - 10:40 p.m.SEA-BUF
12h 35m1 stop
C$ 363Southwest
Find Deal
Fri, 5 Dec - Sat, 6 Dec
Delta Logo
9:14 a.m. - 2:45 p.m.BUF-SEA
8h 31m1 stop
Delta Logo
11:50 a.m. - 10:57 p.m.SEA-BUF
8h 07m1 stop
C$ 366Delta
Find Deal
Thu, 30 Oct - Wed, 5 Nov
Southwest Logo
5:45 a.m. - 3:00 p.m.BUF-SEA
12h 15m2 stops
Southwest Logo
5:40 a.m. - 8:40 p.m.SEA-BUF
12h 00m2 stops
C$ 371Southwest
Find Deal

Everything you should know

Top airlines
Southwest
Cheapest • from C$ 290 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travellers who book at least 4 weeks in advance save around 43% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 11% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
C$ 290
Overall average: C$ 611
Southwest
Tue 13/1Tue 20/1
BUF - SEA • 1 stop
Cheapest one-way flights
C$ 161
Typical prices: C$ 249-478
American Airlines
Sat 25/10
BUF - SEA • 1 stop
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Seattle!
Booking Insights

KAYAK's insights & trends for Buffalo to Seattle flights

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

What’s the cheapest day of the week to fly from Buffalo to Seattle?

The average price of all round-trip flights from Buffalo to Seattle clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Seattle on a Friday and more expensive on a Thursday. On your return trip to Buffalo, you should consider flying back on a Friday, and avoid Wednesdays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Buffalo to Seattle, 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 Buffalo to Seattle is September, where tickets cost C$ 578 (return) on average. On the other hand, the most expensive months are December and May, where the average cost of round-trip tickets is C$ 798 and C$ 712 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Buffalo to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Buffalo to Seattle, you should book around 4 weeks before departure, which saves you about 43% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonMarch
Cheapest flightC$ 161
Best time to beat the crowds (10% less expensive on average)
Most popular time to fly and prices are also 2% lower on average.
Flight from Buffalo to Seattle

When to book flights from Buffalo to Seattle

Are your dates flexible? Find out the best times to travel from Buffalo to Seattle 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 Buffalo to Seattle

  • Are there any transportation options to get me from the Seattle Tacoma International Airport to downtown Seattle?

    A very convenient choice for transportation from the airport is to travel on the King County Metro bus route 124, that can make the trip in around 40 minutes. You can also ride on the Sound Transit 1-Line that will take you from the airport to the downtown area in around 30 minutes.

  • If I plan on renting a car when I arrive at Seattle Tacoma International Airport, where will I find the rental car companies?

    All the rental car companies that operate at this airport do so at the offsite rental car facility. To access this facility after a flight, travel aboard one of the complimentary shuttle buses that passengers can pick up on the lower drive outside of the baggage claim level. There are pick-up points at both ends of the terminal building.

  • If I am going to be using a rideshare service to get me from the Seattle Tacoma International Airport after a flight, where should I plan on meeting my ride?

    All rideshare service vehicles will make their pick-ups at this airport on floor number three of the parking garage. Passengers should look for their vehicles in Parking Rows G, H, I, and J in both the Purple and Orange sections of the garage.

  • Are there any hotels that have a convenient location close to the terminal buildings at the sea Seattle Tacoma International Airport?

    A very convenient choice that sits right along Pacific Highway South across from the terminal building at the airport is the Hilton Seattle Airport & Conference Center, and passengers can access this hotel by walking directly from the airport to the hotel via the sky bridge. Travelers who prefer not to walk will also find this airport offers a complimentary airport shuttle.

  • What is the cheapest flight from Buffalo to Seattle?

    In the last 3 days, the lowest price for a flight from Buffalo to Seattle was C$ 116 for a one-way ticket and C$ 209 for a round-trip.

  • Which airports will I be using when flying from Buffalo to Seattle?

    Buffalo airport is called Buffalo and the only airport in Seattle is Seattle/Tacoma Intl.

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

    Only Delta offers inflight Wi-Fi service on the Buffalo to Seattle flight route.

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

    The Airbus A319 is the aircraft model that flies most regularly on the Buffalo to Seattle flight route.

  • Which airline alliances offer flights from Buffalo to Seattle?

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

  • Which is the best airline for flights from Buffalo to Seattle, Southwest or United Airlines?

    The two airlines most popular with KAYAK users for flights from Buffalo to Seattle are Southwest and United Airlines. With an average price for the route of C$ 625 and an overall rating of 8.0, Southwest is the most popular choice. United Airlines is also a great choice for the route, with an average price of C$ 898 and an overall rating of 7.4.

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

    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 Buffalo to Seattle.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Buffalo 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 Buffalo to Seattle?

    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 Seattle with an airline and back to Buffalo with another airline.

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

    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 Seattle from Buffalo up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Buffalo to Seattle

  • A fantastic way to get to the Buffalo Niagara International Airport (BUF) from the center of Buffalo without having to drive in your own car is to take the Line 24 bus operated by NFTA can make this trip in around 30 minutes.
  • If you plan on driving your own car to Buffalo Niagara International Airport, this airport allows you to book your parking and reserve a spot online on their website. Passengers looking for the most economical choice for parking at this airport should consider the Economy Parking Lot, that has ample blue signage showing its location just offsite from the airport property.
  • If you plan on taking a pet or a service animal with you through the Buffalo Niagara International Airport, it is important to know that this airport offers a pet relief area just outside of the terminal building as well as an indoor pet relief area with a location between Gates 11 and 14.
  • If you are looking for a way to pass the time before a flight from the Buffalo Niagara International Airport, this airport offers a barbershop that you will find on the upper level of the airport just before the security checkpoint.
  • If you are a mother who is nursing and traveling through the Buffalo Niagara International Airport, this airport features a nursing room that has a location near gate 14. The nursing room features a comfortable leather chair, power outlets, a table, as well as a sink.

Reviews of the top airlines flying from Buffalo to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Buffalo to Seattle. 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 Buffalo to Seattle? 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
SouthwestOverall score based on 4248 reviews
8.6Crew
7.5Entertainment
8.0Comfort
7.0Food
8.1Boarding
Airline reviews

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

10.0 ExcellentG, Sep 2025LAS - ATL
Read more Southwest reviews

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

After being assaulted by a flight attendant I was then brushed off as oh well because he long braids didn’t mean to whip me in the eye. I have filed complaints and will see. But like any other issue I’ve had with kayak involved it’s been trash. Last time I’ll be using your app

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

Near 4 hour flight with only 1 service. Had to use call button to request water. Internet and power not working until into flight. Internet would stop working during flight.

Southwest's seats are the least comfortable I have ever sat in.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

Southwest like most American domestic airlines, is a mediocre airline. But it is among the cheapest. Oh well.

My flight was delayed 50 minutes and we were rushed to board to then sit for 15 minutes until the pilot arrived. Unacceptable since we could have waited to board. Also the delayed flight was updated AFTER we boarded to more than the 10 minutes as originally stated.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

Armrest controller on my seat 35D and nextbooennseat 35E did not work right. Hard to press buttons to recognize and 35D had constantnpressure either upmost down somit was nearly impossible to make selections. .

I flew with my dog and had already purchased my dog’s ticket. Even that morning I had called costumer service to insure that my husband and I had seats together since the website was giving me an error when choosing our seats and the representative mentioned our dog. I showed up early to the airport and when I got to the gate and we started boarding I was help back and told that I was supposed to have a yellow tag and that I should have checked in at the counter for them to give me that tag. I was not aware of this, the representative on the phone did not say anything. Nor did I see it anywhere in the checking process online, so if you travel with a pet and are not checking in luggage, just know that you still have to go to the check in counter when arriving at the airport unless you want to be the last one to board and not have room for your carry on in the overhead bins. Other than that, I had a great experience.

Once we got in the air the pilot made up some of the time of the delay. So that was really nice.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

There was no food available for this red eye... one little waffle cookie for a 6+ hour flight... thank God I was able to sleep some

It is clear that someone knew, and competent, is in charge of food at United Airlines at least for the international flights. I was flying in coach, but the choices of the dinner were excellent. Tasty, and appropriate size. I had the beef, which was a little bit like a shepherds pie, and it was good. Nothing comparable has been served on a United flight in years. It will not be confused with three star food, but it is very good for airline food. Even better was the breakfast choice between a cinnamon roll and a breakfast sandwich. I chose the breakfast sandwich which was absolutely delicious and which I would happily order again at my local Starbucks or Panera. It is clear that someone knew indifferent is in charge of the food and it’s about time.

Everything you need to know for your flight from Buffalo to Seattle

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.