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 14/12. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — SEA
29 Nov — 6 Dec1
Round-trip
1 adult
Economy
Round-trip
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Buffalo to Seattle/Tacoma Intl are usually found in September or October, booked 49 days in advance, depart on a Friday or Monday and return on a Tuesday
Cheap 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 30 October 2025.
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 30 October 2025.
Thu 4/123:00 p.m.BUF - SEA
1 stop10h 55mSouthwest
Thu 11/126:35 a.m.SEA - BUF
1 stop6h 15mSouthwest
Deal found 28/10C$ 490
Thu 11/122:05 p.m.BUF - SEA
1 stop11h 25mSouthwest
Mon 15/128:10 a.m.SEA - BUF
2 stops11h 30mSouthwest
Deal found 28/10C$ 517
Mon 24/116:12 a.m.BUF - SEA
1 stop7h 34mDelta
Fri 28/116:00 a.m.SEA - BUF
1 stop8h 04mDelta
Deal found 29/10C$ 521
Thu 27/112:55 p.m.BUF - SEA
1 stop8h 59mUnited Airlines
Thu 4/125:00 a.m.SEA - BUF
2 stops11h 04mUnited Airlines
Deal found 28/10C$ 533
Thu 4/1210:30 a.m.BUF - SEA
2 stops10h 55mUnited Airlines
Thu 11/1211:50 p.m.SEA - BUF
1 stop7h 57mUnited Airlines
Deal found 28/10C$ 535
Tue 9/122:05 p.m.BUF - SEA
1 stop11h 25mSouthwest
Thu 18/125:15 a.m.SEA - BUF
1 stop11h 05mSouthwest
Deal found 27/10C$ 538
Thu 4/126:12 a.m.BUF - SEA
1 stop7h 26mDelta
Sun 7/126:00 a.m.SEA - BUF
1 stop8h 18mDelta
Deal found 28/10C$ 550
Sat 13/1212:10 p.m.BUF - SEA
1 stop11h 40mDelta
Fri 26/126:00 a.m.SEA - BUF
1 stop8h 12mDelta
Deal found 28/10C$ 561
Mon 24/116:12 a.m.BUF - SEA
1 stop7h 34mDelta
Thu 27/1111:00 p.m.SEA - BUF
1 stop9h 00mDelta
Deal found 29/10C$ 563
Thu 18/126:29 p.m.BUF - SEA
1 stop7h 44mAmerican Airlines
Thu 25/1212:14 a.m.SEA - BUF
1 stop8h 48mAmerican Airlines
Deal found 28/10C$ 593
Best flights from Buffalo to Seattle
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 30 October 2025.
Thu 25/126:30 a.m.BUF - SEA
1 stop8h 33mUnited Airlines
Thu 1/17:00 a.m.SEA - BUF
1 stop6h 45mUnited Airlines
Deal found 28/10C$ 490
Fri 20/23:50 p.m.BUF - SEA
1 stop9h 26mDelta
Sun 22/211:05 p.m.SEA - BUF
1 stop7h 40mDelta
Deal found 28/10C$ 507
Tue 9/122:05 p.m.BUF - SEA
1 stop11h 25mSouthwest
Thu 18/125:15 a.m.SEA - BUF
1 stop11h 05mSouthwest
Deal found 27/10C$ 538
Mon 24/116:12 a.m.BUF - SEA
1 stop7h 34mDelta
Fri 28/116:00 a.m.SEA - BUF
1 stop8h 04mDelta
Deal found 29/10C$ 521
Thu 27/112:55 p.m.BUF - SEA
1 stop8h 59mUnited Airlines
Thu 4/125:00 a.m.SEA - BUF
2 stops11h 04mUnited Airlines
Deal found 28/10C$ 533
Wed 7/112:20 p.m.BUF - SEA
2 stops13h 45mSouthwest
Sun 11/16:35 a.m.SEA - BUF
2 stops9h 05mSouthwest
Deal found 28/10C$ 564
Thu 4/126:12 a.m.BUF - SEA
1 stop7h 26mDelta
Sun 7/126:00 a.m.SEA - BUF
1 stop8h 18mDelta
Deal found 28/10C$ 550
Fri 20/23:50 p.m.BUF - SEA
1 stop12h 05mSouthwest
Sun 22/26:25 p.m.SEA - BUF
2 stops10h 40mSouthwest
Deal found 28/10C$ 570
Thu 18/126:12 a.m.BUF - SEA
1 stop7h 28mDelta
Fri 26/126:00 a.m.SEA - BUF
1 stop8h 12mDelta
Deal found 28/10C$ 550
Mon 24/116:12 a.m.BUF - SEA
1 stop7h 34mDelta
Thu 27/1111:00 p.m.SEA - BUF
1 stop9h 00mDelta
Deal found 29/10C$ 563
Last-minute flights from Buffalo to Seattle
Discover last-minute flight deals from Buffalo to Seattle. Data last updated 30 October 2025 and is based on user searches.
Tue 11/1111:19 a.m.BUF - SEA
1 stop11h 47mDelta
Sat 15/1111:10 p.m.SEA - BUF
1 stop6h 24mDelta
Deal found 28/10C$ 750
Tue 11/117:00 a.m.BUF - SEA
2 stops12h 15mUnited Airlines
Sat 15/1111:52 p.m.SEA - BUF
1 stop8h 42mUnited Airlines
Deal found 28/10C$ 757
Wed 12/117:00 a.m.BUF - SEA
1 stop10h 29mDelta
Sat 22/1110:15 p.m.SEA - BUF
1 stop9h 22mDelta
Deal found 28/10C$ 631
Sat 15/116:00 a.m.BUF - SEA
1 stop19h 17mUnited Airlines
Mon 24/117:00 a.m.SEA - BUF
1 stop6h 48mUnited Airlines
Deal found 29/10C$ 642
Mon 24/116:12 a.m.BUF - SEA
1 stop7h 34mDelta
Fri 28/116:00 a.m.SEA - BUF
1 stop8h 04mDelta
Deal found 29/10C$ 521
Mon 24/116:12 a.m.BUF - SEA
1 stop7h 34mDelta
Thu 27/1111:00 p.m.SEA - BUF
1 stop9h 00mDelta
Deal found 29/10C$ 563
Mon 24/1110:50 a.m.BUF - SEA
2 stops10h 17mUnited Airlines
Fri 28/116:13 a.m.SEA - BUF
1 stop9h 34mUnited Airlines
Deal found 29/10C$ 640
Mon 24/116:00 a.m.BUF - SEA
1 stop9h 34mUnited Airlines
Thu 27/115:05 a.m.SEA - BUF
2 stops10h 34mUnited Airlines
Deal found 29/10C$ 665
Thu 27/112:55 p.m.BUF - SEA
1 stop8h 59mUnited Airlines
Thu 4/125:00 a.m.SEA - BUF
2 stops11h 04mUnited Airlines
Deal found 28/10C$ 533
Thu 27/118:50 a.m.BUF - SEA
2 stops11h 25mSouthwest
Thu 4/128:10 a.m.SEA - BUF
2 stops11h 30mSouthwest
Deal found 28/10C$ 647
One-way flights from Buffalo to Seattle
Search for one-way flight options from Buffalo to Seattle. Find affordable one-way fares based on user searches. Data last updated 30 October 2025.
Sun 14/123:18 p.m.BUF - SEA
2 stops23h 35mFrontier
Deal found 30/10C$ 147
Fri 12/1212:37 p.m.BUF - SEA
2 stops48h 19mFrontier
Deal found 28/10C$ 186
Wed 31/125:44 p.m.BUF - SEA
2 stops33h 58mFrontier
Deal found 27/10C$ 208
Sun 14/123:18 p.m.BUF - SEA
3 stops28h 18mMultiple Airlines
Deal found 30/10C$ 253
Fri 5/126:15 a.m.BUF - SEA
1 stop10h 10mSouthwest
Deal found 27/10C$ 286
Fri 12/1212:37 p.m.BUF - SEA
3 stops27h 53mMultiple Airlines
Deal found 28/10C$ 304
Sun 14/124:46 p.m.BUF - SEA
1 stop9h 39mAmerican Airlines
Deal found 30/10C$ 306
Sat 3/17:05 p.m.BUF - SEA
2 stops42h 06mFrontier
Deal found 27/10C$ 313
Mon 5/110:43 a.m.BUF - SEA
2 stops29h 58mFrontier
Deal found 27/10C$ 327
Tue 18/1110:50 a.m.BUF - SEA
3 stops15h 54mUnited Airlines
Deal found 28/10C$ 341
Fri 28/117:00 a.m.BUF - SEA
1 stop7h 30mUnited Airlines
Deal found 30/10C$ 348
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 629,999 searches. Data last updated 30 October 2025.
Use the filters below to find and compare flights from Buffalo to Seattle that are best for you.
Fly from
Buffalo
Fly to
Seattle
Route
Depart
Return
Price
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Thu 25/12
6:30 a.m.-12:03 p.m.
1 stop8h 33m
Seattle/Tacoma Intl
Thu 1/1
7:00 a.m.-4:45 p.m.
1 stop6h 45m
C$ 490
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Fri 20/2
3:50 p.m.-10:16 p.m.
1 stop9h 26m
Seattle/Tacoma Intl
Sun 22/2
11:05 p.m.-9:45 a.m.
1 stop7h 40m
C$ 507
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Mon 24/11
6:12 a.m.-10:46 a.m.
1 stop7h 34m
Seattle/Tacoma Intl
Fri 28/11
6:00 a.m.-5:04 p.m.
1 stop8h 04m
C$ 521
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Thu 27/11
2:55 p.m.-8:54 p.m.
1 stop8h 59m
Seattle/Tacoma Intl
Thu 4/12
5:00 a.m.-7:04 p.m.
2 stops11h 04m
C$ 533
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Tue 9/12
2:05 p.m.-10:30 p.m.
1 stop11h 25m
Seattle/Tacoma Intl
Thu 18/12
5:15 a.m.-7:20 p.m.
1 stop11h 05m
C$ 538
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Thu 4/12
6:12 a.m.-10:38 a.m.
1 stop7h 26m
Seattle/Tacoma Intl
Sun 7/12
6:00 a.m.-5:18 p.m.
1 stop8h 18m
C$ 550
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Thu 18/12
6:12 a.m.-10:40 a.m.
1 stop7h 28m
Seattle/Tacoma Intl
Fri 26/12
6:00 a.m.-5:12 p.m.
1 stop8h 12m
C$ 550
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Mon 24/11
6:12 a.m.-10:46 a.m.
1 stop7h 34m
Seattle/Tacoma Intl
Thu 27/11
11:00 p.m.-11:00 a.m.
1 stop9h 00m
C$ 563
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Wed 7/1
12:20 p.m.-11:05 p.m.
2 stops13h 45m
Seattle/Tacoma Intl
Sun 11/1
6:35 a.m.-6:40 p.m.
2 stops9h 05m
C$ 564
BuffaloSeattle
BUF - SEA
BUFSEA
Buffalo
Fri 20/2
3:50 p.m.-12:55 a.m.
1 stop12h 05m
Seattle/Tacoma Intl
Sun 22/2
6:25 p.m.-8:05 a.m.
2 stops10h 40m
C$ 570
Flights are sorted by cheapest round-trip flights first.
Deals found on 30/10
Showing 1-10 of 21 results
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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.
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
Prices
More
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 24 October 2025.
To ensure you get the cheapest price possible for a flight from Buffalo to Seattle, you should look to book at least 48 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
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 C$ 216). Flying from Buffalo to Seattle in December is currently the most expensive (average of C$ 444). 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.
What is the cheapest time of day to fly from BUF to SEA?
Find hourly flight availability from Buffalo to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 October 2025.
Unlike in the morning, when flights are generally more expensive, you can save up to 40% on flights from Buffalo to Seattle by exploring options for tickets in the evening.
What’s the top layover airport for flights from Buffalo to Seattle?
Share of one-stop round-trip flights from Buffalo to Seattle chosen by Cheapflights users in the past 12 months, using the same layover each way.
Chicago (ORD) – chosen by Cheapflights users on 44% of one-stop itineraries from Buffalo to Seattle on Cheapflights.
What’s the fastest layover option from Buffalo to Seattle?
Shortest average travel time for 1-stop one-way flights from Buffalo to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Chicago (MDW) have the shortest average one-way travel time for 1-stop routes: 7h 20m.
What’s the fastest layover option from Buffalo to Seattle?
Shortest average travel time for 1-stop one-way flights from Buffalo to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Chicago (MDW) have the shortest average one-way travel time for 1-stop routes: 7h 20m.
Which airport typically offers the quickest layover for flights from Buffalo to Seattle?
Average layover duration for 1-stop one-way flights from Buffalo to Seattle, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Chicago (MDW) offer the fastest connection on this route, with an average layover time of 1h 08m.
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 30 October 2025.
Get a feel of what it's like to fly with Southwest and United Airlines from Buffalo to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
AC was not adequate, even on a night flight. WiFi subpar even for the airlines
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.
How long is the flight from Buffalo to Seattle?
There are many flights that can get you from Buffalo to Seattle in 8h 33m. Fly via United Airlines, Delta, or Southwest to get the fastest option. Buffalo and Seattle are separated by a distance of 3404 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from Buffalo to Seattle round-trip?
According to our current data, Southwest (C$ 428), and United Airlines (C$ 475) offers the cheapest pricing from Buffalo to Seattle. Southwest is priced at 34% lower than the current average price of a flight leaving 3 months from now.
Can I find deals for business class flights from Buffalo to Seattle?
Yes. Cheapflights offers flight deals from Buffalo to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
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 C$ 216). Flying from Buffalo to Seattle in December is currently the most expensive (average of C$ 444). 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.
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 30 October 2025.
Discover the top 2 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 629,999 searches. Data last updated 30 October 2025.
Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Buffalo to Seattle?
Cheapflights makes it easy to find Buffalo to Seattle flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.
Why should you use Cheapflights to find cheap flight tickets from Buffalo to Seattle?
Cheapflights simply makes it quick and affordable to book flights from Buffalo to Seattle by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.
Can Cheapflights find flights from Buffalo to Seattle with no change fees?
Yes, we can. To see specific flights from Buffalo to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.
Can Cheapflights notify me if prices for flights from Buffalo to Seattle become cheaper?
Not ready to book yet? You can track prices for flights from Buffalo to Seattle on Cheapflights with our Price Alert feature and get notified when better prices are available.
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