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Cheap flights from Buffalo to Seattle from C$ 251

BUF — SEA
23 Oct — 30 Oct1
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

Tue 13/103:53 p.m. -
1 stop10h 11m
Mon 19/1011:10 p.m. -
1 stop6h 16m
Deal found 20/9C$ 502
Tue 20/107:00 a.m. -
1 stop7h 27m
Tue 27/105:05 a.m. -
2 stops8h 57m
Deal found 22/9C$ 509
Sat 5/128:25 a.m. -
2 stops10h 40m
Wed 9/129:25 a.m. -
2 stops8h 25m
Deal found 22/9C$ 516
Mon 19/107:30 p.m. -
1 stop8h 30m
Thu 22/1012:10 a.m. -
2 stops11h 00m
Deal found 20/9C$ 530
Tue 20/102:00 p.m. -
2 stops11h 40m
Tue 27/109:00 a.m. -
2 stops8h 35m
Deal found 22/9C$ 537
Sat 10/103:52 p.m. -
1 stop9h 44m
Sat 17/1010:42 a.m. -
1 stop7h 05m
Deal found 19/9C$ 546
Wed 14/107:00 a.m. -
2 stops10h 17m
Wed 21/1011:13 p.m. -
1 stop7h 16m
Deal found 20/9C$ 553
Tue 13/108:00 a.m. -
1 stop10h 43m
Mon 19/1010:48 p.m. -
1 stop10h 58m
Deal found 21/9C$ 558
Sat 17/1012:30 p.m. -
2 stops12h 10m
Sat 24/109:10 a.m. -
2 stops9h 35m
Deal found 19/9C$ 593
Tue 27/102:00 p.m. -
2 stops11h 40m
Sun 1/115:30 a.m. -
1 stop6h 55m
Deal found 21/9C$ 600
Tue 13/102:00 p.m. -
2 stops12h 00m
Tue 20/1012:10 a.m. -
1 stop7h 15m
Deal found 22/9C$ 607

Find flight deals from Buffalo to Seattle

Round-trip from

C$ 502

One-way from

C$ 251

Popular in

April

Cheapest in

February

Average price

C$ 669
United Airlines
  • United Airlines
  • 20/1-26/1
  • 2 total stops
  • 17h 15m total
  • Buffalo to Seattle
Search Deals
United Airlines
  • United Airlines
  • 31/10-31/12
  • 1 total stop
  • 8h 28m total
  • Buffalo to Seattle
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2026
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Cheapflights Fare Finder

 
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
Quickest round-trip

BuffaloSeattle

BUF Buffalo - SEA Seattle/Tacoma Intl

BUFSEA

Buffalo

Sat 31/10

5:49 p.m.-11:17 p.m.

1 stop8h 28m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 251

BuffaloSeattle

BUF Buffalo - SEA Seattle/Tacoma Intl

BUFSEA

Buffalo

Wed 4/11

3:53 p.m.-11:04 p.m.

1 stop10h 11m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 251

BuffaloSeattle

BUF Buffalo - SEA Seattle/Tacoma Intl

BUFSEA

Buffalo

Tue 13/10

3:53 p.m.-11:04 p.m.

1 stop10h 11m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 251

BuffaloSeattle

BUF Buffalo - SEA Seattle/Tacoma Intl

BUFSEA

Buffalo

Wed 4/11

3:55 p.m.-11:35 p.m.

2 stops10h 40m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 258

BuffaloSeattle

BUF Buffalo - SEA Seattle/Tacoma Intl

BUFSEA

Buffalo

Tue 13/10

10:46 a.m.-8:37 p.m.

2 stops12h 51m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 258

BuffaloSeattle

BUF Buffalo - SEA Seattle/Tacoma Intl

BUFSEA

Buffalo

Tue 27/10

2:00 p.m.-10:40 p.m.

2 stops11h 40m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 258

BuffaloSeattle

BUF Buffalo - SEA Seattle/Tacoma Intl

BUFSEA

Buffalo

Tue 20/10

10:46 a.m.-8:37 p.m.

2 stops12h 51m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 258

BuffaloSeattle

BUF Buffalo - SEA Seattle/Tacoma Intl

BUFSEA

Buffalo

Tue 3/11

2:00 p.m.-10:45 p.m.

2 stops11h 45m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 315

BuffaloSeattle

BUF Buffalo - SEA Seattle/Tacoma Intl

BUFSEA

Buffalo

Sun 1/11

3:05 p.m.-12:40 a.m.

2 stops12h 35m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 350

BuffaloSeattle

BUF Buffalo - SEA Seattle/Tacoma Intl

BUFSEA

Buffalo

Tue 3/11

6:00 a.m.-8:56 p.m.

3 stops17h 56m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 357

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/9

Showing 1-10 of 21 resultsSorted by cheapest first
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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

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 46 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, February is the cheapest month in which you can book a flight from Buffalo to Seattle (average of C$ 539). Flying from Buffalo to Seattle in April is currently the most expensive (average of C$ 825). 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?

Airfare is below average for this route at the moment.

Buffalo to Seattle flights typically cost between C$ 569 and C$ 827 in January.
The cheapest round-trip price found within the last 5 days was C$ 502 on United Airlines (20 Jan-26 Jan).

Reviews of airlines servicing Seattle

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
8.0
Very good
4,196 reviews
Check prices

Entertainment

7.5

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
4.0
Okay

Steven,Sep 2026

OGG - HNL

It was a red eye overnight which I prefer. But this time the seat was SOOOO uncomfortable that sleeping was difficult and painful
Southwest
8.0
Very good
4,196 reviews
Southwest
8.0
Very good
4,196 reviews
Check prices

Entertainment

7.5

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
4.0
Okay

Steven,Sep 2026

OGG - HNL

It was a red eye overnight which I prefer. But this time the seat was SOOOO uncomfortable that sleeping was difficult and painful
Delta
7.8
Good
8,594 reviews
Southwest
8.0
Very good
4,196 reviews
Check prices

Entertainment

7.5

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
4.0
Okay

Steven,Sep 2026

OGG - HNL

It was a red eye overnight which I prefer. But this time the seat was SOOOO uncomfortable that sleeping was difficult and painful

Related info for your journey

  • How long is the flight from Buffalo to Seattle?

    There are many flights that can get you from Buffalo to Seattle in 7h 27m. Fly via Delta, United Airlines, 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, Delta (C$ 235), and Southwest (C$ 436) offers the cheapest pricing from Buffalo to Seattle. Delta is priced at 66% 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, February is the cheapest month in which you can book a flight from Buffalo to Seattle (average of C$ 539). Flying from Buffalo to Seattle in April is currently the most expensive (average of C$ 825). 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
Kent
Mukilteo
Leavenworth
Renton
Lynnwood
Cashmere
Ellensburg
Tukwila
Tacoma
Marysville
Federal Way
Kirkland

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Buffalo to Seattle

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

Top 2 airlines flying from Buffalo to Seattle

AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 235AverageC$ 540FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
SouthwestCheapestC$ 436AverageC$ 719FlexibilityNo cancel feeOn-time63%
Search Southwest flights

Fly with Cheapflights

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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