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Cheap flights from Belfast to Seattle from £323

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Belfast to Seattle departing on 3/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap return flights

Enter your travel dates to find the best prices.
British Airways Logo
10:05 - 18:25
BHD
-
SEA
16h 20m
1 stop
British Airways Logo
13:19 - 17:40
SEA
-
BHD
20h 21m
2 stops
£693British Airways
Wed, 22 Apr - Sun, 26 Apr
British Airways Logo
10:05 - 18:25
BHD
-
SEA
16h 20m
1 stop
British Airways Logo
13:30 - 13:25
SEA
-
BHD
15h 55m
1 stop
£694British Airways
Wed, 22 Apr - Sun, 26 Apr
British Airways Logo
10:05 - 00:36
BHD
-
SEA
22h 31m
2 stops
British Airways Logo
13:30 - 13:25
SEA
-
BHD
15h 55m
1 stop
£694British Airways
Wed, 22 Apr - Sun, 26 Apr
British Airways Logo
10:05 - 22:38
BHD
-
SEA
20h 33m
2 stops
British Airways Logo
13:30 - 13:25
SEA
-
BHD
15h 55m
1 stop
£695British Airways
Wed, 22 Apr - Sun, 26 Apr
British Airways Logo
10:05 - 00:36
BHD
-
SEA
22h 31m
2 stops
British Airways Logo
13:19 - 14:35
SEA
-
BHD
17h 16m
2 stops
£697British Airways
Wed, 22 Apr - Sun, 26 Apr
British Airways Logo
10:05 - 00:36
BHD
-
SEA
22h 31m
2 stops
British Airways Logo
13:19 - 17:40
SEA
-
BHD
20h 21m
2 stops
£698British Airways
Wed, 22 Apr - Sun, 26 Apr
British Airways Logo
10:05 - 22:38
BHD
-
SEA
20h 33m
2 stops
British Airways Logo
11:16 - 14:35
SEA
-
BHD
19h 19m
2 stops
£699British Airways
Wed, 22 Apr - Sun, 26 Apr
British Airways Logo
10:05 - 18:25
BHD
-
SEA
16h 20m
1 stop
British Airways Logo
13:30 - 13:25
SEA
-
BHD
15h 55m
1 stop
£717British Airways
Wed, 22 Apr - Sun, 26 Apr

British Airways flights from Belfast to Seattle

Our best British Airways deals on Belfast to Seattle flight tickets
British Airways
22 Apr
BHD10:05Belfast City
16h 20m
1 stop
SEA18:25Seattle/Tacoma Intl
26 Apr
SEA13:19Seattle/Tacoma Intl
20h 21m
2 stops
BHD17:40Belfast City
£693
British Airways
22 Apr
BHD10:05Belfast City
16h 20m
1 stop
SEA18:25Seattle/Tacoma Intl
26 Apr
SEA13:30Seattle/Tacoma Intl
15h 55m
1 stop
BHD13:25Belfast City
£694
British Airways
22 Apr
BHD10:05Belfast City
22h 31m
2 stops
SEA00:36Seattle/Tacoma Intl
26 Apr
SEA13:30Seattle/Tacoma Intl
15h 55m
1 stop
BHD13:25Belfast City
£694

momondo Fare Finder

 
Customise your flight search to find flights from Belfast 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 279,928 searches. Data last updated 13 March 2026.
Use the filters below to find and compare flights from Belfast to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 22/4

10:05-18:25

1 stop16h 20m

Seattle/Tacoma Intl

Sun 26/4

13:19-17:40

2 stops20h 21m

£693
Fastest return journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 22/4

10:05-18:25

1 stop16h 20m

Seattle/Tacoma Intl

Sun 26/4

13:30-13:25

1 stop15h 55m

£694

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 22/4

10:05-00:36

2 stops22h 31m

Seattle/Tacoma Intl

Sun 26/4

13:30-13:25

1 stop15h 55m

£694

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 22/4

10:05-22:38

2 stops20h 33m

Seattle/Tacoma Intl

Sun 26/4

13:30-13:25

1 stop15h 55m

£695

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 22/4

10:05-00:36

2 stops22h 31m

Seattle/Tacoma Intl

Sun 26/4

13:19-14:35

2 stops17h 16m

£697

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 22/4

10:05-00:36

2 stops22h 31m

Seattle/Tacoma Intl

Sun 26/4

13:19-17:40

2 stops20h 21m

£698

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 22/4

10:05-22:38

2 stops20h 33m

Seattle/Tacoma Intl

Sun 26/4

11:16-14:35

2 stops19h 19m

£699

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 22/4

10:05-18:25

1 stop16h 20m

Seattle/Tacoma Intl

Sun 26/4

13:30-13:25

1 stop15h 55m

£717
Cheapest one-way

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sun 3/5

22:00-18:45

3 stops52h 45m

£323

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sun 3/5

17:55-16:00

3 stops54h 05m

£354

Flights are sorted by cheapest return flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

See travel insights to Seattle from

How to get the cheapest flight ticket from Belfast 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 airline that flies from Belfast to Seattle/Tacoma Intl?

British Airways is the most popular carrier operating from Belfast to Seattle/Tacoma Intl

Cheap Belfast to Seattle flight deals and tips

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

Fastest flight time

13h 05m

Direct flights

None
The fastest flight from Belfast to Seattle takes 13h 05m
There are no direct flights from Belfast to Seattle. There are no popular flight routes from Belfast to Seattle.
Search flight deals

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

    Seattle/Tacoma Intl is 4463.0 mi away from Belfast. By plane, this route typically takes 13h 05m.

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

    Prices for flights from Belfast to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

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

  • How old do you have to be to fly from Belfast 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 Belfast to Seattle/Tacoma Intl Airport.

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

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Belfast to Seattle

Compare and see reviews for airlines that fly from Belfast to Seattle with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom £566Free CancellationRating
7.1
11,464 reviews
Search American Airlines flights

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Fife
SeaTac
Tukwila

Why use momondo?

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

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

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

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

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

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

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

Yes momondo offers price alerts on flights to Seattle from Belfast. 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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