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$140+ 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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — SEA
nov. 15 — nov. 221
sáb. 11/15
sáb. 11/22
1 adult, Economy
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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 Tuesday or Wednesday and return on a Wednesday

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 octubre 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$315
(Southwest)

One-way from

$140
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$414
Provider with most accurate pricing for Buffalo-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Buffalo-Seattle/Tacoma Intl flights.
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From Buffalo to Seattle/Tacoma Intl
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One-way flight from Buffalo to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 9% potential increase in price ($48 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Buffalo to Seattle

Cheapest flights from Buffalo to Seattle
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 octubre 16, 2025.

This Southwest deal was found by Cheapflights users on 10/16. 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.
mar. 12/163:00 pmBUF - SEA
1 stop10h 55mSouthwest
dom. 1/188:45 amSEA - BUF
1 stop10h 15mSouthwest
Deal found 10/16$315
This Delta deal was found by Cheapflights users on 10/16. 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.
lun. 12/1512:10 pmBUF - SEA
1 stop11h 40mDelta
dom. 1/1811:05 pmSEA - BUF
1 stop7h 40mDelta
Deal found 10/16$349
This Southwest deal was found by Cheapflights users on 10/15. 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.
mié. 11/123:00 pmBUF - SEA
1 stop10h 55mSouthwest
mié. 11/196:35 amSEA - BUF
1 stop6h 15mSouthwest
Deal found 10/15$351
This Delta deal was found by Cheapflights users on 10/16. 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.
dom. 12/146:12 amBUF - SEA
1 stop7h 28mDelta
dom. 1/1811:05 pmSEA - BUF
1 stop7h 40mDelta
Deal found 10/16$358
This Delta deal was found by Cheapflights users on 10/16. 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.
mar. 12/166:00 amBUF - SEA
1 stop11h 35mDelta
mar. 1/209:55 pmSEA - BUF
1 stop17h 56mDelta
Deal found 10/16$362
This Delta deal was found by Cheapflights users on 10/15. 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.
jue. 11/136:10 amBUF - SEA
1 stop11h 27mDelta
dom. 11/1611:55 pmSEA - BUF
2 stops14h 12mDelta
Deal found 10/15$363
This American Airlines deal was found by Cheapflights users on 10/16. 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.
lun. 12/226:29 pmBUF - SEA
1 stop7h 44mAmerican Airlines
mar. 12/3012:14 amSEA - BUF
1 stop14h 44mAmerican Airlines
Deal found 10/16$384
This American Airlines deal was found by Cheapflights users on 10/16. 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.
jue. 11/136:12 amBUF - SEA
1 stop9h 57mAmerican Airlines
jue. 11/201:53 pmSEA - BUF
1 stop7h 15mAmerican Airlines
Deal found 10/16$385

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 octubre 16, 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

mié. 12/17

6:12 am-10:40 am

1 stop7h 28m

Seattle/Tacoma Intl

dom. 1/18

11:05 pm-9:45 am

1 stop7h 40m

$315

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

jue. 11/13

7:00 am-2:29 pm

1 stop10h 29m

Seattle/Tacoma Intl

lun. 11/17

10:15 pm-10:37 am

1 stop9h 22m

$351

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

mar. 11/11

8:30 am-6:25 pm

2 stops12h 55m

Seattle/Tacoma Intl

mar. 11/11

11:34 pm-10:03 am

1 stop7h 29m

$356

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

jue. 12/11

1:50 pm-11:15 pm

2 stops12h 25m

Seattle/Tacoma Intl

lun. 12/15

11:50 pm-10:47 am

1 stop7h 57m

$356

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

dom. 12/14

6:12 am-10:40 am

1 stop7h 28m

Seattle/Tacoma Intl

dom. 1/18

11:05 pm-9:45 am

1 stop7h 40m

$358

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

mié. 11/12

12:40 pm-10:30 pm

2 stops12h 50m

Seattle/Tacoma Intl

mié. 11/19

5:40 am-8:40 pm

2 stops12h 00m

$361

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

jue. 11/13

6:12 am-1:09 pm

1 stop9h 57m

Seattle/Tacoma Intl

jue. 11/20

1:53 pm-12:08 am

1 stop7h 15m

$385

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

jue. 11/13

3:40 pm-12:35 am

2 stops11h 55m

Seattle/Tacoma Intl

jue. 11/20

6:35 am-3:50 pm

1 stop6h 15m

$390

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

mar. 12/16

3:00 pm-10:28 pm

2 stops10h 28m

Seattle/Tacoma Intl

dom. 1/18

8:40 am-8:29 pm

2 stops8h 49m

$393

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

sáb. 11/8

5:00 pm-11:54 pm

1 stop9h 54m

Seattle/Tacoma Intl

sáb. 11/22

11:10 pm-8:34 am

1 stop6h 24m

$393

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/15

Showing 1-10 of 22 results
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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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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.
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 October 10, 2025.

The best time to book flights from Buffalo to Seattle is 48 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 $318). 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 octubre 16, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 47% on flights from Buffalo to Seattle by exploring options for tickets in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from Buffalo to Seattle. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Buffalo to Seattle flight should consider departing on Wednesday evenings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 octubre 16, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United 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.
Southwest
8.0
Very good
4,241 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,984 reviews
Southwest
8.0
Very good
4,241 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,982 reviews
Southwest
8.0
Very good
4,241 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
11,043 reviews
Southwest
8.0
Very good
4,241 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,137 reviews
Southwest
8.0
Very good
4,241 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

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?

    Departing from Buffalo to Seattle will take you 7h 28m. There are 2115 mi between Buffalo and Seattle. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Buffalo to Seattle round-trip?

    Cheapflights users have booked flights from Buffalo to Seattle round-trip from $125. Other airlines that can offer you cheap pricing are Frontier, from $155, and American Airlines, from $328. JetBlue is currently priced 73% below the average price you’ll pay for this route.

  • Can I find deals for flights from Buffalo to Seattle that include hotel bookings?

    Yes. In addition to deals on Buffalo to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Buffalo to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Buffalo to Seattle.

  • 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 $155). Flying from Buffalo to Seattle in December is currently the most expensive (average of $318). 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.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Marysville
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Buffalo to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Buffalo to Seattle

Discover the top 7 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 octubre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$125Average$287FlexibilityNo cancel feeOn-time62%
FrontierCheapest$155Average$281FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$328Average$479FlexibilityNo cancel feeOn-time71%
DeltaCheapest$330Average$498FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$344Average$488FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$345Average$456FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$558Average$672FlexibilityNo cancel feeOn-time75%

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