Cheap flights from Buffalo to Seattle from $115

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 8/25. 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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0 bags

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Find the cheapest flights from Buffalo to Seattle (BUF-SEA)

Cheap round-trip flights

Frontier Logo
4:57 pm - 12:30 amBUF-SEA
10h 33m1 stop
Frontier Logo
6:12 am - 4:03 pmSEA-BUF
6h 51m1 stop
$155Frontier
Find Deal
Fri, Sep 26 - Mon, Sep 29
Frontier Logo
4:57 pm - 12:30 amBUF-SEA
10h 33m1 stop
Frontier Logo
6:12 am - 4:03 pmSEA-BUF
6h 51m1 stop
$156Frontier
Find Deal
Fri, Sep 19 - Mon, Sep 22
American Airlines Logo
6:14 am - 1:46 pmBUF-SEA
10h 32m1 stop
American Airlines Logo
12:34 am - 10:41 amSEA-BUF
7h 07m1 stop
$297American Airlines
Find Deal
Wed, Oct 15 - Tue, Oct 21
Delta Logo
6:00 am - 2:01 pmBUF-SEA
11h 01m1 stop
Delta Logo
11:15 pm - 8:23 amSEA-BUF
6h 08m1 stop
$313Delta
Find Deal
Tue, Oct 7 - Sat, Oct 11
United Airlines Logo
7:05 am - 3:52 pmBUF-SEA
11h 47m2 stops
United Airlines Logo
11:40 pm - 9:53 amSEA-BUF
7h 13m1 stop
$318United Airlines
Find Deal
Tue, Sep 23 - Thu, Sep 25
Southwest Logo
6:45 pm - 11:25 pmBUF-SEA
7h 40m1 stop
Southwest Logo
5:15 am - 8:45 pmSEA-BUF
12h 30m2 stops
$333Southwest
Find Deal
Tue, Sep 23 - Fri, Oct 3
American Airlines Logo
6:00 am - 12:00 pmBUF-SEA
9h 00m1 stop
American Airlines Logo
12:34 am - 10:41 amSEA-BUF
7h 07m1 stop
$337American Airlines
Find Deal
Tue, Sep 30 - Tue, Oct 7
Southwest Logo
4:05 pm - 11:25 pmBUF-SEA
10h 20m2 stops
Southwest Logo
5:15 am - 8:45 pmSEA-BUF
12h 30m2 stops
$338Southwest
Find Deal
Tue, Sep 23 - Fri, Oct 3
Delta Logo
4:35 pm - 11:54 pmBUF-SEA
10h 19m1 stop
Delta Logo
6:00 am - 3:16 pmSEA-BUF
6h 16m1 stop
$344Delta
Find Deal
Fri, Oct 24 - Mon, Oct 27
United Airlines Logo
5:54 pm - 10:20 pmBUF-SEA
7h 26m1 stop
United Airlines Logo
10:55 pm - 9:45 amSEA-BUF
7h 50m1 stop
$358United Airlines
Find Deal
Mon, Sep 15 - Wed, Sep 17

Frontier flights from Buffalo to Seattle

Our best Frontier deals on Buffalo to Seattle flight tickets
Frontier
Sep 26
BUF4:57 pmBuffalo
10h 33m
1 stop
SEA12:30 amSeattle/Tacoma Intl
Sep 29
SEA6:12 amSeattle/Tacoma Intl
6h 51m
1 stop
BUF4:03 pmBuffalo
Frontier
Sep 19
BUF4:57 pmBuffalo
10h 33m
1 stop
SEA12:30 amSeattle/Tacoma Intl
Sep 22
SEA6:12 amSeattle/Tacoma Intl
6h 51m
1 stop
BUF4:03 pmBuffalo
Frontier
Sep 19
BUF4:57 pmBuffalo
10h 33m
1 stop
SEA12:30 amSeattle/Tacoma Intl
Sep 27
SEA7:00 amSeattle/Tacoma Intl
30h 02m
1 stop
BUF4:02 pmBuffalo

Delta flights from Buffalo to Seattle

Our best Delta deals on Buffalo to Seattle flight tickets
Delta
Oct 7
BUF6:00 amBuffalo
11h 01m
1 stop
SEA2:01 pmSeattle/Tacoma Intl
Oct 11
SEA11:15 pmSeattle/Tacoma Intl
6h 08m
1 stop
BUF8:23 amBuffalo
Delta
Oct 24
BUF4:35 pmBuffalo
10h 19m
1 stop
SEA11:54 pmSeattle/Tacoma Intl
Oct 27
SEA6:00 amSeattle/Tacoma Intl
6h 16m
1 stop
BUF3:16 pmBuffalo
Delta
Oct 3
BUF4:43 pmBuffalo
10h 11m
1 stop
SEA11:54 pmSeattle/Tacoma Intl
Oct 31
SEA11:43 amSeattle/Tacoma Intl
8h 09m
1 stop
BUF10:52 pmBuffalo

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 832,500 searches. Data last updated August 21, 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

Fri 9/26

4:57 pm-12:30 am

1 stop10h 33m

Seattle/Tacoma Intl

Mon 9/29

6:12 am-4:03 pm

1 stop6h 51m

$155

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Fri 9/19

4:57 pm-12:30 am

1 stop10h 33m

Seattle/Tacoma Intl

Mon 9/22

6:12 am-4:03 pm

1 stop6h 51m

$156

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Wed 10/15

6:14 am-1:46 pm

1 stop10h 32m

Seattle/Tacoma Intl

Tue 10/21

12:34 am-10:41 am

1 stop7h 07m

$297

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Tue 10/7

6:00 am-2:01 pm

1 stop11h 01m

Seattle/Tacoma Intl

Sat 10/11

11:15 pm-8:23 am

1 stop6h 08m

$313

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Tue 9/23

7:05 am-3:52 pm

2 stops11h 47m

Seattle/Tacoma Intl

Thu 9/25

11:40 pm-9:53 am

1 stop7h 13m

$318

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Tue 9/23

6:45 pm-11:25 pm

1 stop7h 40m

Seattle/Tacoma Intl

Fri 10/3

5:15 am-8:45 pm

2 stops12h 30m

$333

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Tue 9/30

6:00 am-12:00 pm

1 stop9h 00m

Seattle/Tacoma Intl

Tue 10/7

12:34 am-10:41 am

1 stop7h 07m

$337

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Tue 9/23

4:05 pm-11:25 pm

2 stops10h 20m

Seattle/Tacoma Intl

Fri 10/3

5:15 am-8:45 pm

2 stops12h 30m

$338

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Fri 10/24

4:35 pm-11:54 pm

1 stop10h 19m

Seattle/Tacoma Intl

Mon 10/27

6:00 am-3:16 pm

1 stop6h 16m

$344

BuffaloSeattle

BUF - SEA

BUFSEA

Buffalo

Mon 9/15

5:54 pm-10:20 pm

1 stop7h 26m

Seattle/Tacoma Intl

Wed 9/17

10:55 pm-9:45 am

1 stop7h 50m

$358

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?

In general, March is the cheapest month to fly from Buffalo to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $422. If you don’t want to visit Seattle in March, then you should wait until July to fly from Buffalo, when ticket prices are also cheap, with an average price of $423.

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

On average, the least expensive day to fly to Seattle from Buffalo is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $473. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Buffalo because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $600.

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

Flying to Seattle from Buffalo in the evening is the least expensive time of day to depart. momondo users have found prices as low as $400 when looking at flights departing in the evening. Flights to Seattle are more costly in the afternoon, with an average ticket price of $495. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Buffalo to Seattle/Tacoma Intl flight route?

Fly from Buffalo to Seattle/Tacoma Intl for the best Buffalo - Seattle/Tacoma Intl flight prices

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 $469 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 $388 on momondo.

What cabin class options are available on Buffalo to Seattle/Tacoma Intl flights?

There are 1 cabin classes available to choose from on Buffalo to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Buffalo to Seattle flight prices changed over time?

As of August 2025, prices for Buffalo to Seattle flights are approximately 12% more expensive 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

Direct flights

None
There are no direct flights from Buffalo to Seattle. There are no popular flight routes from Buffalo to Seattle.
  • How far is Buffalo to Seattle/Tacoma Intl by plane?

    A flight from Buffalo to Seattle/Tacoma Intl will travel around 2109.4 mi. In terms of flight time, this usually takes a little over 7h 20m.

  • 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 are updated daily.

  • 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?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, 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 required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable 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
JetBluePriceFrom $125Free CancellationRating
7.2
2,916 reviews
Search JetBlue flights
FrontierPriceFrom $172Free CancellationRating
5.8
3,207 reviews
Search Frontier flights
Sun Country AirPriceFrom $304Free CancellationRating
6.9
333 reviews
Search Sun Country Air flights
American AirlinesPriceFrom $333Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $335Free CancellationRating
7.9
7,981 reviews
Search Delta flights
SouthwestPriceFrom $345Free CancellationRating
8.0
4,245 reviews
Search Southwest flights
United AirlinesPriceFrom $346Free CancellationRating
7.4
8,930 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $558Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Tacoma
SeaTac
Ocean Shores
Olympia
Renton
Kent
Lynnwood
Federal Way
Marysville
Puyallup
Tukwila
Kirkland
Lakewood
Centralia
Cle Elum
Shoreline
Fife
Redmond
Westport

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?

momondo does allow users to show only those flights to Seattle from Buffalo which offer a flexible booking policy as well as other useful filters and features.

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

momondo provides multiple filters to help you find the best flight to Seattle from Buffalo. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes momondo offers price alerts on flights to Seattle from Buffalo. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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1 adult
Tue 8/26
Tue 9/2

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