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Cheap flights from Buffalo to Seattle from C$ 157

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Buffalo to Seattle departing on 16/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Buffalo to Seattle (BUF-SEA)

Cheap round-trip flights

Southwest Logo
6:45 p.m. - 11:35 p.m.BUF-SEA
7h 50m1 stop
Southwest Logo
5:35 a.m. - 3:45 p.m.SEA-BUF
7h 10m1 stop
C$ 314Southwest
Find Deal
mié., 17 sep. - mar., 23 sep.
Southwest Logo
4:05 p.m. - 9:30 p.m.BUF-SEA
8h 25m1 stop
Southwest Logo
5:55 a.m. - 3:15 p.m.SEA-BUF
6h 20m1 stop
C$ 343Southwest
Find Deal
sáb., 13 sep. - sáb., 20 sep.
Delta Logo
5:10 p.m. - 11:59 p.m.BUF-SEA
9h 49m1 stop
Delta Logo
7:25 a.m. - 6:03 p.m.SEA-BUF
7h 38m1 stop
C$ 371Delta
Find Deal
jue., 4 sep. - jue., 11 sep.
United Airlines Logo
2:50 p.m. - 10:20 p.m.BUF-SEA
10h 30m2 stops
United Airlines Logo
11:54 p.m. - 9:53 a.m.SEA-BUF
6h 59m1 stop
C$ 378United Airlines
Find Deal
mar., 16 sep. - jue., 18 sep.
Frontier Logo
4:57 p.m. - 8:39 p.m.BUF-SEA
30h 42m1 stop
Frontier Logo
7:00 a.m. - 4:02 p.m.SEA-BUF
30h 02m1 stop
C$ 383Frontier
Find Deal
vie., 19 sep. - sáb., 27 sep.
Frontier Logo
4:55 p.m. - 12:34 a.m.BUF-SEA
10h 39m1 stop
Frontier Logo
12:40 p.m. - 1:22 p.m.SEA-BUF
21h 42m1 stop
C$ 386Frontier
Find Deal
vie., 22 ago. - sáb., 30 ago.
United Airlines Logo
5:54 p.m. - 10:20 p.m.BUF-SEA
7h 26m1 stop
United Airlines Logo
11:54 p.m. - 9:53 a.m.SEA-BUF
6h 59m1 stop
C$ 396United Airlines
Find Deal
lun., 15 sep. - jue., 18 sep.
Logo
2:22 p.m. - 12:34 a.m.BUF-SEA
13h 12m1 stop
Logo
11:55 p.m. - 10:47 a.m.SEA-BUF
7h 52m1 stop
C$ 412
Find Deal
dom., 24 ago. - dom., 31 ago.
Delta Logo
6:20 a.m. - 10:33 a.m.BUF-SEA
7h 13m1 stop
Delta Logo
6:00 a.m. - 6:07 p.m.SEA-BUF
9h 07m1 stop
C$ 425Delta
Find Deal
mié., 27 ago. - jue., 4 sep.
Logo
11:45 a.m. - 10:43 p.m.BUF-SEA
13h 58m1 stop
Logo
12:40 p.m. - 1:22 p.m.SEA-BUF
21h 42m1 stop
C$ 451
Find Deal
jue., 21 ago. - sáb., 30 ago.

Southwest flights from Buffalo to Seattle

Our best Southwest deals on Buffalo to Seattle flight tickets
Southwest
17 Sep
BUF6:45 p.m.Buffalo
7h 50m
1 stop
SEA11:35 p.m.Seattle/Tacoma Intl
23 Sep
SEA5:35 a.m.Seattle/Tacoma Intl
7h 10m
1 stop
BUF3:45 p.m.Buffalo
C$ 314
Find similar
Southwest
13 Sep
BUF4:05 p.m.Buffalo
8h 25m
1 stop
SEA9:30 p.m.Seattle/Tacoma Intl
20 Sep
SEA5:55 a.m.Seattle/Tacoma Intl
6h 20m
1 stop
BUF3:15 p.m.Buffalo
C$ 343
Find similar
Southwest
27 Sep
BUF3:20 p.m.Buffalo
8h 10m
1 stop
SEA8:30 p.m.Seattle/Tacoma Intl
4 Oct
SEA4:30 p.m.Seattle/Tacoma Intl
12h 25m
2 stops
BUF7:55 a.m.Buffalo
C$ 352
Find similar

Delta flights from Buffalo to Seattle

Our best Delta deals on Buffalo to Seattle flight tickets
Delta
4 Sep
BUF5:10 p.m.Buffalo
9h 49m
1 stop
SEA11:59 p.m.Seattle/Tacoma Intl
11 Sep
SEA7:25 a.m.Seattle/Tacoma Intl
7h 38m
1 stop
BUF6:03 p.m.Buffalo
C$ 371
Find similar
Delta
27 Aug
BUF6:20 a.m.Buffalo
7h 13m
1 stop
SEA10:33 a.m.Seattle/Tacoma Intl
4 Sep
SEA6:00 a.m.Seattle/Tacoma Intl
9h 07m
1 stop
BUF6:07 p.m.Buffalo
C$ 425
Find similar
Delta
1 Oct
BUF12:48 p.m.Buffalo
8h 06m
1 stop
SEA5:54 p.m.Seattle/Tacoma Intl
5 Oct
SEA11:11 p.m.Seattle/Tacoma Intl
6h 12m
1 stop
BUF8:23 a.m.Buffalo
C$ 456
Find similar

momondo 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, momondo users made 96,600 searches. Data last updated 6 agosto 2025.
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

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

mié. 17/9

6:45 p.m.-11:35 p.m.

1 stop7h 50m

Seattle/Tacoma Intl

mar. 23/9

5:35 a.m.-3:45 p.m.

1 stop7h 10m

C$ 314

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

sáb. 13/9

4:05 p.m.-9:30 p.m.

1 stop8h 25m

Seattle/Tacoma Intl

sáb. 20/9

5:55 a.m.-3:15 p.m.

1 stop6h 20m

C$ 343

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

jue. 4/9

5:10 p.m.-11:59 p.m.

1 stop9h 49m

Seattle/Tacoma Intl

jue. 11/9

7:25 a.m.-6:03 p.m.

1 stop7h 38m

C$ 371

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

mar. 16/9

2:50 p.m.-10:20 p.m.

2 stops10h 30m

Seattle/Tacoma Intl

jue. 18/9

11:54 p.m.-9:53 a.m.

1 stop6h 59m

C$ 378

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

vie. 19/9

4:57 p.m.-8:39 p.m.

1 stop30h 42m

Seattle/Tacoma Intl

sáb. 27/9

7:00 a.m.-4:02 p.m.

1 stop30h 02m

C$ 383

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

vie. 22/8

4:55 p.m.-12:34 a.m.

1 stop10h 39m

Seattle/Tacoma Intl

sáb. 30/8

12:40 p.m.-1:22 p.m.

1 stop21h 42m

C$ 386

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

lun. 15/9

5:54 p.m.-10:20 p.m.

1 stop7h 26m

Seattle/Tacoma Intl

jue. 18/9

11:54 p.m.-9:53 a.m.

1 stop6h 59m

C$ 396

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

dom. 24/8

2:22 p.m.-12:34 a.m.

1 stop13h 12m

Seattle/Tacoma Intl

dom. 31/8

11:55 p.m.-10:47 a.m.

1 stop7h 52m

C$ 412

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

mié. 27/8

6:20 a.m.-10:33 a.m.

1 stop7h 13m

Seattle/Tacoma Intl

jue. 4/9

6:00 a.m.-6:07 p.m.

1 stop9h 07m

C$ 425

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

jue. 21/8

11:45 a.m.-10:43 p.m.

1 stop13h 58m

Seattle/Tacoma Intl

sáb. 30/8

12:40 p.m.-1:22 p.m.

1 stop21h 42m

C$ 451

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Buffalo to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

If you aren’t able to travel to Seattle during the month of October, then flying in March is also cheap. Prices for this month can be found on momondo for an average of C$ 582.

What is the cheapest day to depart on your flight to Seattle?

Our data shows that Friday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 530. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around C$ 807. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.

What is the cheapest time of day to depart on your flight to Seattle?

Our most recent data shows that the best time of day to fly to Seattle is in the evening. Flights from Buffalo to Seattle during this time can be as low as C$ 457. Flights in the morning are often more expensive with an average ticket price of C$ 765.

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Buffalo when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around C$ 647 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Buffalo for as low as C$ 507 on momondo.

How have Buffalo to Seattle flight prices changed over time?

As of August 2025, prices for Buffalo to Seattle flights are approximately 19% cheaper when compared to flights at the same time last year.

When to book flights from Buffalo to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Buffalo to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Buffalo to Seattle (BUF to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Buffalo to Seattle

Best price found

C$ 157

Fastest flight time

7h 10m

Direct flights

None

Airports in Seattle

1 airport
The best one-way flight to Seattle from Buffalo in the past 72 hours is C$ 157. The best round-trip flight deal from Buffalo to Seattle found on momondo in the last 72 hours is C$ 314.
The fastest flight from Buffalo to Seattle takes 7h 10m
There are no direct flights from Buffalo to Seattle. Popular non-direct route for this connection is Buffalo Airport - Seattle/Tacoma Intl Airport.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

  • How far is Buffalo to Seattle/Tacoma Intl by plane?

    Seattle/Tacoma Intl is 3394.7 km away from Buffalo. Flights usually cover this in 7h 10m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Buffalo Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Buffalo Airport to Seattle/Tacoma Intl Airport were last updated today.

  • How many operators does momondo search for flights from Buffalo Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Buffalo Airport to Seattle/Tacoma Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Buffalo Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Buffalo to Seattle?

  • What is the most popular airline from Buffalo to Seattle?

Best airlines flying from Buffalo to Seattle

Compare and see reviews for airlines that fly from Buffalo to Seattle with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom C$ 422Free CancellationRating
8.0
4,244 reviews
Search Southwest flights
DeltaPriceFrom C$ 422Free CancellationRating
8.0
7,985 reviews
Search Delta flights
United AirlinesPriceFrom C$ 469Free CancellationRating
7.4
8,917 reviews
Search United Airlines flights

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Marysville
Lynnwood
SeaTac
Tacoma
Ellensburg
Kirkland
Redmond
Olympia
Ocean Shores
Shoreline
Tukwila
Renton
Gig Harbor
Mukilteo
Cle Elum
Poulsbo
Puyallup
Kent
Centralia

Why use momondo?

Why should I use momondo to find a flight deal from Buffalo to Seattle?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Buffalo to Seattle. momondo saves you time and could save you money on your trip.

Can I find flights from Buffalo to Seattle with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Buffalo to Seattle flights to just show those with flexible booking policies.

How can momondo help me find flights from Buffalo to Seattle?

Once all potential Buffalo to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Buffalo to Seattle right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Buffalo and alert you when they change.

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