$127+ Cheap flights from Buffalo to Seattle (BUF - SEA)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — SEA
May 10 — May 171
Round-trip
1 adult, Economy
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Cheapest flights from Buffalo to SeattleExplore the most affordable flight options available from Buffalo to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 10, 2026.
Explore the most affordable flight options available from Buffalo to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 10, 2026.
This Trip.com deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/112:18 pm
BUF
- SEA
2 stops24h 09m
Frontier
Mon 5/44:20 pm
SEA
- BUF
2 stops15h 21m
Frontier
Deal found 4/7![Frontier logo]()
$362
This Southwest deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/136:55 pm
BUF
- SEA
1 stop8h 15m
Southwest
Wed 5/2011:45 pm
SEA
- BUF
1 stop7h 30m
Southwest
Deal found 4/7![Southwest logo]()
$391
This Southwest deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/283:10 pm
BUF
- SEA
2 stops11h 25m
Southwest
Tue 5/511:40 am
SEA
- BUF
1 stop8h 10m
Southwest
Deal found 4/5![Southwest logo]()
$396
This Delta deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/93:52 pm
BUF
- SEA
1 stop9h 56m
Delta
Tue 6/25:30 am
SEA
- BUF
1 stop6h 42m
Delta
Deal found 4/6![Delta logo]()
$399
This American Airlines deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:00 am
BUF
- SEA
1 stop9h 34m
American Airlines
Tue 5/261:46 pm
SEA
- BUF
1 stop7h 23m
American Airlines
Deal found 4/6![American Airlines logo]()
$400
This Southwest deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/63:10 pm
BUF
- SEA
2 stops10h 20m
Southwest
Sat 5/95:45 am
SEA
- BUF
1 stop7h 50m
Southwest
Deal found 4/8![Southwest logo]()
$404
This Delta deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/133:52 pm
BUF
- SEA
1 stop7h 49m
Delta
Mon 6/111:05 pm
SEA
- BUF
1 stop6h 15m
Delta
Deal found 4/6![Delta logo]()
$406
This Delta deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/26:05 am
BUF
- SEA
1 stop7h 27m
Delta
Sat 5/165:30 am
SEA
- BUF
1 stop6h 42m
Delta
Deal found 4/9![Delta logo]()
$407
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/133:52 pm
BUF
- SEA
1 stop7h 49m
Delta
Wed 5/207:30 am
SEA
- BUF
1 stop8h 14m
Delta
Deal found 4/7![Delta logo]()
$411
This Delta deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/93:52 pm
BUF
- SEA
1 stop9h 56m
Delta
Sat 5/2310:35 pm
SEA
- BUF
1 stop8h 09m
Delta
Deal found 4/6![Delta logo]()
$414
Best flights from Buffalo to SeattleDiscover carefully curated flight deals from Buffalo to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 10, 2026.
Discover carefully curated flight deals from Buffalo to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 10, 2026.
This Delta deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/297:59 pm
BUF
- SEA
1 stop17h 59m
Delta
Sat 5/165:30 am
SEA
- BUF
1 stop6h 42m
Delta
Deal found 4/9![Delta logo]()
$469
This United Airlines deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/25:52 pm
BUF
- SEA
1 stop7h 44m
United Airlines
Tue 7/77:01 am
SEA
- BUF
1 stop6h 45m
United Airlines
Deal found 4/9![United Airlines logo]()
$477
This Southwest deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/249:40 am
BUF
- SEA
1 stop8h 20m
Southwest
Sun 9/275:55 am
SEA
- BUF
2 stops16h 35m
Southwest
Deal found 4/9![Southwest logo]()
$488
This United Airlines deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:52 pm
BUF
- SEA
1 stop7h 50m
United Airlines
Mon 9/1410:47 pm
SEA
- BUF
1 stop7h 27m
United Airlines
Deal found 4/5![United Airlines logo]()
$477
This Delta deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/89:00 am
BUF
- SEA
1 stop8h 50m
Delta
Sat 8/295:30 pm
SEA
- BUF
1 stop19h 00m
Delta
Deal found 4/8![Delta logo]()
$480
This Southwest deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/35:25 pm
BUF
- SEA
1 stop9h 55m
Southwest
Mon 9/711:05 pm
SEA
- BUF
1 stop9h 15m
Southwest
Deal found 4/9![Southwest logo]()
$494
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/112:50 pm
BUF
- SEA
1 stop8h 38m
Delta
Tue 5/56:00 am
SEA
- BUF
1 stop6h 13m
Delta
Deal found 4/7![Delta logo]()
$484
This Southwest deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/510:10 am
BUF
- SEA
1 stop9h 50m
Southwest
Sun 9/1311:05 pm
SEA
- BUF
1 stop8h 40m
Southwest
Deal found 4/5![Southwest logo]()
$494
This Southwest deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/14:00 pm
BUF
- SEA
2 stops11h 55m
Southwest
Sat 5/161:20 pm
SEA
- BUF
2 stops15h 55m
Southwest
Deal found 4/9![Southwest logo]()
$495
This Southwest deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1011:45 am
BUF
- SEA
1 stop9h 35m
Southwest
Mon 9/1411:05 pm
SEA
- BUF
2 stops10h 25m
Southwest
Deal found 4/5![Southwest logo]()
$499
This Southwest deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/224:00 pm
BUF
- SEA
2 stops11h 10m
Southwest
Wed 4/2911:45 pm
SEA
- BUF
1 stop7h 30m
Southwest
Deal found 4/5![Southwest logo]()
$499
Last-minute flights from Buffalo to SeattleDiscover last-minute flight deals from Buffalo to Seattle. Data last updated April 10, 2026 and is based on user searches.
Discover last-minute flight deals from Buffalo to Seattle. Data last updated April 10, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/283:10 pm
BUF
- SEA
2 stops11h 25m
Southwest
Tue 5/511:40 am
SEA
- BUF
1 stop8h 10m
Southwest
Deal found 4/5![Southwest logo]()
$396
This Trip.com deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/112:18 pm
BUF
- SEA
2 stops24h 09m
Frontier
Mon 5/44:20 pm
SEA
- BUF
2 stops15h 21m
Frontier
Deal found 4/7![Frontier logo]()
$362
This Delta deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/26:05 am
BUF
- SEA
1 stop7h 27m
Delta
Sat 5/165:30 am
SEA
- BUF
1 stop6h 42m
Delta
Deal found 4/9![Delta logo]()
$407
This Southwest deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/63:10 pm
BUF
- SEA
2 stops10h 20m
Southwest
Sat 5/95:45 am
SEA
- BUF
1 stop7h 50m
Southwest
Deal found 4/8![Southwest logo]()
$404
This Delta deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/93:52 pm
BUF
- SEA
1 stop9h 56m
Delta
Tue 6/25:30 am
SEA
- BUF
1 stop6h 42m
Delta
Deal found 4/6![Delta logo]()
$399
This Delta deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/93:52 pm
BUF
- SEA
1 stop9h 56m
Delta
Thu 5/2812:30 pm
SEA
- BUF
1 stop8h 29m
Delta
Deal found 4/6![Delta logo]()
$414
This Southwest deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/136:55 pm
BUF
- SEA
1 stop8h 15m
Southwest
Wed 5/2011:45 pm
SEA
- BUF
1 stop7h 30m
Southwest
Deal found 4/7![Southwest logo]()
$391
This Delta deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/133:52 pm
BUF
- SEA
1 stop7h 49m
Delta
Mon 6/111:05 pm
SEA
- BUF
1 stop6h 15m
Delta
Deal found 4/6![Delta logo]()
$406
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/133:52 pm
BUF
- SEA
1 stop7h 49m
Delta
Wed 5/207:30 am
SEA
- BUF
1 stop8h 14m
Delta
Deal found 4/7![Delta logo]()
$411
This American Airlines deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:00 am
BUF
- SEA
1 stop9h 34m
American Airlines
Tue 5/261:46 pm
SEA
- BUF
1 stop7h 23m
American Airlines
Deal found 4/6![American Airlines logo]()
$400
One-way flights from Buffalo to SeattleSearch for one-way flight options from Buffalo to Seattle. Find affordable one-way fares based on user searches. Data last updated April 10, 2026.
Search for one-way flight options from Buffalo to Seattle. Find affordable one-way fares based on user searches. Data last updated April 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/511:36 am
BUF
- SEA
2 stops25h 13m
Frontier
Deal found 4/5![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/82:49 pm
BUF
- SEA
2 stops22h 00m
Frontier
Deal found 4/8![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/132:49 pm
BUF
- SEA
2 stops22h 00m
Frontier
Deal found 4/5![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/281:56 pm
BUF
- SEA
2 stops22h 31m
Frontier
Deal found 4/7![Frontier logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/511:36 am
BUF
- SEA
3 stops33h 59m
Multiple Airlines
Deal found 4/5![Multiple Airlines logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/211:56 pm
BUF
- SEA
2 stops22h 31m
Frontier
Deal found 4/5![Frontier logo]()
$163
This Cheapflightsfares deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:45 am
BUF
- SEA
1 stop8h 11m
Sun Country Air
Deal found 4/9![Sun Country Air logo]()
$192
This American Airlines deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/53:01 pm
BUF
- SEA
1 stop10h 37m
American Airlines
Deal found 4/5![American Airlines logo]()
$196
This American Airlines deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/23:55 pm
BUF
- SEA
1 stop8h 28m
American Airlines
Deal found 4/10![American Airlines logo]()
$204
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/284:59 pm
BUF
- SEA
1 stop9h 54m
Delta
Deal found 4/7![Delta logo]()
$206
Find flight deals from Buffalo to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Buffalo (BUF) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $362 (Trip.com) |
One-way from | $127 (Kiwi.com) |
Popular in | November |
Cheapest in | October |
Average price | $517 |
Cheapflights Fare Finder
Customize your flight search to find flights from Buffalo to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 10, 2026.
Use the filters below to find and compare flights from Buffalo to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Wed 4/29
7:59 pm-10:58 am
1 stop17h 59m
Seattle/Tacoma Intl
Sat 5/16
5:30 am-3:12 pm
1 stop6h 42m
$469
Quickest round-trip
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Thu 7/2
5:52 pm-10:36 pm
1 stop7h 44m
Seattle/Tacoma Intl
Tue 7/7
7:01 am-4:46 pm
1 stop6h 45m
$477
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Thu 9/10
5:52 pm-10:42 pm
1 stop7h 50m
Seattle/Tacoma Intl
Mon 9/14
10:47 pm-9:14 am
1 stop7h 27m
$477
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Fri 5/8
9:00 am-2:50 pm
1 stop8h 50m
Seattle/Tacoma Intl
Sat 8/29
5:30 pm-3:30 pm
1 stop19h 00m
$480
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Fri 5/1
12:50 pm-6:28 pm
1 stop8h 38m
Seattle/Tacoma Intl
Tue 5/5
6:00 am-3:13 pm
1 stop6h 13m
$484
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Thu 9/24
9:40 am-3:00 pm
1 stop8h 20m
Seattle/Tacoma Intl
Sun 9/27
5:55 am-1:30 am
2 stops16h 35m
$488
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Thu 9/3
5:25 pm-12:20 am
1 stop9h 55m
Seattle/Tacoma Intl
Mon 9/7
11:05 pm-11:20 am
1 stop9h 15m
$494
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Sat 9/5
10:10 am-5:00 pm
1 stop9h 50m
Seattle/Tacoma Intl
Sun 9/13
11:05 pm-10:45 am
1 stop8h 40m
$494
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Fri 5/1
4:00 pm-12:55 am
2 stops11h 55m
Seattle/Tacoma Intl
Sat 5/16
1:20 pm-8:15 am
2 stops15h 55m
$495
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Thu 9/10
11:45 am-6:20 pm
1 stop9h 35m
Seattle/Tacoma Intl
Mon 9/14
11:05 pm-12:30 pm
2 stops10h 25m
$499
Showing 1-10 of 21 resultsSorted by cheapest first
Compare providers for flights from Buffalo to Seattle
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Buffalo to Seattle in April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars |
- Most accurate provider: When it comes to deals on Buffalo-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Buffalo-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Buffalo-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Buffalo-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Buffalo-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Buffalo to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Buffalo with our price prediction graph.
BUF-SEA
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Buffalo to Seattle
How far ahead should I book a flight from Buffalo to Seattle?
Use this chart to determine the optimal time to book a round-trip flight from Buffalo to Seattle. Price data was last updated on April 9, 2026.
The best time to book flights from Buffalo to Seattle is 37 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Buffalo to Seattle?
Currently, September is the cheapest month in which you can book a flight from Buffalo to Seattle (average of $155). Flying from Buffalo to Seattle in December is currently the most expensive (average of $326). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Buffalo to Seattle?
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated April 10, 2026.
Peruse reviews from past customers who have flown with Southwest,Delta, andUnited Airlines from Buffalo to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from Buffalo to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Tacoma
Ocean Shores
Olympia
Kent
Lynnwood
Lacey
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Renton
Puyallup
Kirkland
Ellensburg
Fife
Lakewood
Issaquah
Shoreline
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Buffalo to Seattle
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Complete your trip
Complete your trip to Seattle by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Buffalo to Seattle by cabin class
Find flights from Buffalo to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Buffalo and Seattle flights
Browse other Buffalo and Seattle flight options. Last updated on April 10, 2026.
Other flights from Buffalo
Browse through other flights departing from Buffalo. Flights are based on user searches made on Cheapflights and were last updated on April 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on April 10, 2026.
Top 6 airlines flying from Buffalo to Seattle
Discover the top 6 airlines that operate flights from Buffalo to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$145 | Average$287 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$150 | Average$280 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$171 | Average$467 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$310 | Average$467 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$326 | Average$459 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$335 | Average$457 | FlexibilityNo cancel fee | On-time63% |