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Cheap flights from Buffalo to Seattle from C$ 232

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 19/6. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — SEA
6 Jun — 13 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Buffalo to Seattle

Enter your travel dates to find the best prices.

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 7 May 2026.

Wed 9/93:55 p.m.
BUF
-
SEA
1 stop10h 10m
Southwest
Tue 15/911:05 p.m.
SEA
-
BUF
1 stop9h 15m
Southwest
Deal found 4/5C$ 533
Thu 28/53:53 p.m.
BUF
-
SEA
1 stop9h 52m
Delta
Wed 10/67:15 a.m.
SEA
-
BUF
1 stop9h 11m
Delta
Deal found 4/5C$ 554
Tue 2/66:55 p.m.
BUF
-
SEA
1 stop8h 15m
Southwest
Tue 9/65:00 a.m.
SEA
-
BUF
1 stop7h 45m
Southwest
Deal found 5/5C$ 560
Thu 28/53:53 p.m.
BUF
-
SEA
1 stop9h 52m
Delta
Wed 3/611:20 a.m.
SEA
-
BUF
1 stop9h 59m
Delta
Deal found 5/5C$ 567
Tue 2/610:32 a.m.
BUF
-
SEA
1 stop12h 38m
Delta
Wed 10/67:15 a.m.
SEA
-
BUF
1 stop9h 11m
Delta
Deal found 4/5C$ 569
Thu 28/53:53 p.m.
BUF
-
SEA
1 stop9h 52m
Delta
Sat 6/611:25 a.m.
SEA
-
BUF
1 stop9h 54m
Delta
Deal found 4/5C$ 574
Wed 3/66:55 p.m.
BUF
-
SEA
1 stop8h 15m
Southwest
Wed 10/67:30 p.m.
SEA
-
BUF
2 stops9h 40m
Southwest
Deal found 4/5C$ 581
Sat 19/910:50 a.m.
BUF
-
SEA
2 stops10h 25m
Southwest
Mon 28/911:05 p.m.
SEA
-
BUF
2 stops10h 25m
Southwest
Deal found 5/5C$ 588
Tue 2/610:32 a.m.
BUF
-
SEA
1 stop12h 38m
Delta
Mon 8/610:20 p.m.
SEA
-
BUF
1 stop8h 20m
Delta
Deal found 4/5C$ 589
Wed 3/63:53 p.m.
BUF
-
SEA
1 stop9h 52m
Delta
Sat 13/610:20 p.m.
SEA
-
BUF
1 stop8h 20m
Delta
Deal found 3/5C$ 592

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 7 May 2026.

Round-trip from

C$ 533

One-way from

C$ 232

Popular in

November

Cheapest in

October

Average price

C$ 641
Southwest
  • Southwest
  • 9/9-15/9
  • 2 total stops
  • 19h 25m total
  • Buffalo to Seattle
Search Deals
Frontier
  • Frontier
  • 19/6
  • 2 total stops
  • 21h 58m total
  • Buffalo to Seattle
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

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 7 May 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

Price

Cheapest round-trip

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Tue 18/8

6:25 p.m.-11:35 p.m.

1 stop8h 10m

Seattle/Tacoma Intl

Wed 26/8

11:05 p.m.-10:45 a.m.

1 stop8h 40m

C$ 560

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Thu 13/8

7:10 p.m.-11:30 p.m.

1 stop7h 20m

Seattle/Tacoma Intl

Mon 17/8

11:05 p.m.-11:20 a.m.

1 stop9h 15m

C$ 574

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Sat 15/8

5:15 p.m.-9:30 p.m.

1 stop7h 15m

Seattle/Tacoma Intl

Thu 20/8

11:05 p.m.-12:45 p.m.

2 stops10h 40m

C$ 581

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Sat 19/9

10:50 a.m.-6:15 p.m.

2 stops10h 25m

Seattle/Tacoma Intl

Mon 28/9

11:05 p.m.-11:20 a.m.

1 stop9h 15m

C$ 581

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Wed 3/6

6:55 p.m.-12:10 a.m.

1 stop8h 15m

Seattle/Tacoma Intl

Sat 6/6

7:35 p.m.-7:55 a.m.

2 stops9h 20m

C$ 581
Quickest round-trip

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Wed 16/9

6:25 p.m.-11:35 p.m.

1 stop8h 10m

Seattle/Tacoma Intl

Mon 21/9

5:15 a.m.-3:15 p.m.

1 stop7h 00m

C$ 592

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Mon 24/8

5:40 a.m.-1:55 p.m.

2 stops11h 15m

Seattle/Tacoma Intl

Sat 29/8

11:05 p.m.-10:50 a.m.

1 stop8h 45m

C$ 619
Cheapest one-way

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Wed 29/7

6:00 a.m.-12:13 p.m.

1 stop9h 13m

C$ 281

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Thu 4/6

11:36 a.m.-10:06 a.m.

2 stops25h 30m

C$ 281

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Thu 4/6

4:57 p.m.-12:41 a.m.

1 stop10h 44m

C$ 286

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/5

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

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?

To ensure you get the cheapest price possible for a flight from Buffalo to Seattle, you should look to book at least 36 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, October is the cheapest month in which you can book a flight from Buffalo to Seattle (average of C$ 449). Flying from Buffalo to Seattle in November is currently the most expensive (average of C$ 792). 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 7 May 2026.
Get a feel of what it's like to fly with Southwest and Delta 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.
Southwest
7.9
Good
4,301 reviews
Check prices

Overall

7.9

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
7.9
Good
4,301 reviews
Southwest
7.9
Good
4,301 reviews
Check prices

Overall

7.9

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,459 reviews
Southwest
7.9
Good
4,301 reviews
Check prices

Overall

7.9

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 10m. Fly via Southwest to get the fastest option. Buffalo and Seattle are separated by a distance of 3404 km.

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

    According to our current data, Delta (C$ 228), and Southwest (C$ 409) offers the cheapest pricing from Buffalo to Seattle. Delta is priced at 63% lower than the current average price of a flight leaving 3 months from now.

  • 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, October is the cheapest month in which you can book a flight from Buffalo to Seattle (average of C$ 449). Flying from Buffalo to Seattle in November is currently the most expensive (average of C$ 792). 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

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Leavenworth
Mukilteo
Kent
Tacoma
Bothell
Cashmere
Olympia
Renton
Marysville
Lynnwood
Kirkland
Tukwila

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.
Newark to Seattle flights
Buffalo to Portland flights
John F Kennedy Intl to Seattle flights

Top 2 airlines flying from Buffalo to Seattle

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 7 May 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 228AverageC$ 524FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
SouthwestCheapestC$ 409AverageC$ 680FlexibilityNo cancel feeOn-time63%
Search Southwest flights

Fly with Cheapflights

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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