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Cheap flights from Washington to Belfast from £266

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Belfast departing on 18/2. 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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Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
15:35 - 20:10
SEA
-
BFS
21h 35m
2 stops
Multiple Airlines Logo
20:45 - 18:00
BFS
-
SEA
52h 15m
2 stops
£446Multiple Airlines
Sun, 8 Mar - Sun, 15 Mar
British Airways Logo
18:50 - 16:45
SEA
-
BHD
13h 55m
1 stop
British Airways Logo
09:15 - 17:55
BHD
-
SEA
15h 40m
1 stop
£459British Airways
Sat, 7 Mar - Wed, 18 Mar
British Airways Logo
18:50 - 19:40
SEA
-
BHD
16h 50m
1 stop
British Airways Logo
11:25 - 17:55
BHD
-
SEA
13h 30m
1 stop
£460British Airways
Sat, 7 Mar - Wed, 18 Mar
British Airways Logo
13:35 - 14:15
SEA
-
BHD
16h 40m
1 stop
British Airways Logo
11:25 - 17:55
BHD
-
SEA
13h 30m
1 stop
£461British Airways
Sat, 7 Mar - Tue, 17 Mar
British Airways Logo
18:50 - 19:40
SEA
-
BHD
16h 50m
1 stop
British Airways Logo
06:35 - 23:04
BHD
-
SEA
23h 29m
2 stops
£464British Airways
Sat, 7 Mar - Tue, 17 Mar
British Airways Logo
18:50 - 19:40
SEA
-
BHD
16h 50m
1 stop
British Airways Logo
06:35 - 23:04
BHD
-
SEA
23h 29m
2 stops
£465British Airways
Sat, 7 Mar - Tue, 17 Mar
British Airways Logo
18:50 - 19:40
SEA
-
BHD
16h 50m
1 stop
British Airways Logo
11:25 - 00:24
BHD
-
SEA
19h 59m
2 stops
£470British Airways
Sat, 7 Mar - Wed, 18 Mar
British Airways Logo
18:50 - 07:30
SEA
-
BHD
28h 40m
1 stop
British Airways Logo
20:25 - 17:55
BHD
-
SEA
28h 30m
1 stop
£471British Airways
Wed, 4 Mar - Sun, 8 Mar
American Airlines Logo
11:48 - 14:15
PDX
-
BHD
18h 27m
2 stops
American Airlines Logo
08:45 - 20:44
BHD
-
PDX
19h 59m
2 stops
£510American Airlines
Wed, 25 Feb - Tue, 3 Mar
Multiple Airlines Logo
13:25 - 16:50
PDX
-
BHD
19h 25m
1 stop
Multiple Airlines Logo
17:20 - 11:25
BHD
-
PDX
26h 05m
1 stop
£515Multiple Airlines
Wed, 25 Feb - Tue, 3 Mar

British Airways flights from State of Washington to Belfast

Our best British Airways deals on State of Washington to Belfast flight tickets
British Airways
7 Mar
SEA18:50Seattle/Tacoma Intl
13h 55m
1 stop
BHD16:45Belfast City
18 Mar
BHD09:15Belfast City
15h 40m
1 stop
SEA17:55Seattle/Tacoma Intl
£459
British Airways
7 Mar
SEA18:50Seattle/Tacoma Intl
16h 50m
1 stop
BHD19:40Belfast City
18 Mar
BHD11:25Belfast City
13h 30m
1 stop
SEA17:55Seattle/Tacoma Intl
£460
British Airways
7 Mar
SEA13:35Seattle/Tacoma Intl
16h 40m
1 stop
BHD14:15Belfast City
17 Mar
BHD11:25Belfast City
13h 30m
1 stop
SEA17:55Seattle/Tacoma Intl
£461

Aer Lingus flights from State of Washington to Belfast

Our best Aer Lingus deals on State of Washington to Belfast flight tickets
Aer Lingus
23 Mar
SEA21:05Seattle/Tacoma Intl
16h 50m
2 stops
BHD20:55Belfast City
27 Mar
BHD08:45Belfast City
17h 35m
2 stops
SEA19:20Seattle/Tacoma Intl
£783
Aer Lingus
23 Mar
SEA21:05Seattle/Tacoma Intl
15h 50m
2 stops
BHD19:55Belfast City
27 Mar
BHD08:45Belfast City
17h 35m
2 stops
SEA19:20Seattle/Tacoma Intl
£833
Aer Lingus
23 Mar
SEA21:05Seattle/Tacoma Intl
16h 50m
2 stops
BHD20:55Belfast City
27 Mar
BHD08:45Belfast City
17h 35m
2 stops
SEA19:20Seattle/Tacoma Intl
£837

momondo Fare Finder

 
Customise your flight search to find flights from State of Washington to Belfast 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 7 February 2026.
Use the filters below to find and compare flights from Washington to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Sun 8/3

15:35-20:10

2 stops21h 35m

Belfast Intl

Sun 15/3

20:45-18:00

2 stops52h 15m

£446

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

18:50-16:45

1 stop13h 55m

Belfast City

Wed 18/3

09:15-17:55

1 stop15h 40m

£459

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

18:50-19:40

1 stop16h 50m

Belfast City

Wed 18/3

11:25-17:55

1 stop13h 30m

£460

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

13:35-14:15

1 stop16h 40m

Belfast City

Tue 17/3

11:25-17:55

1 stop13h 30m

£461

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

18:50-19:40

1 stop16h 50m

Belfast City

Tue 17/3

06:35-23:04

2 stops23h 29m

£464

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

18:50-19:40

1 stop16h 50m

Belfast City

Tue 17/3

06:35-23:04

2 stops23h 29m

£464

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

18:50-19:40

1 stop16h 50m

Belfast City

Wed 18/3

11:25-00:24

2 stops19h 59m

£470

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 4/3

18:50-07:30

1 stop28h 40m

Belfast City

Sun 8/3

20:25-17:55

1 stop28h 30m

£471

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 25/2

11:48-14:15

2 stops18h 27m

Belfast City

Tue 3/3

08:45-20:44

2 stops19h 59m

£510

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 25/2

13:25-16:50

1 stop19h 25m

Belfast City

Tue 3/3

17:20-11:25

1 stop26h 05m

£515

Flights are sorted by cheapest return flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
1
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See travel insights to Belfast from

How to get the cheapest flight ticket from State of Washington to Belfast

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 Washington to Belfast?

British Airways is the most popular carrier operating from Washington to Belfast

Cheap State of Washington to Belfast flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Belfast

Fastest flight time

12h 35m

Direct flights

None
The fastest flight from State of Washington to Belfast takes 12h 35m
There are no direct flights from State of Washington to Belfast. There are no popular flight routes from State of Washington to Belfast.
Search flight deals

  • When did momondo last update prices for flights from Washington to Belfast?

    Prices for flights from Washington to Belfast refresh daily.

  • How old do you have to be to fly from Washington to Belfast?

    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 Washington to Belfast.

  • What documentation or ID do you need to fly to Belfast?

    The travel and health documents required for your trip to Belfast 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 Belfast. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

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

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

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

Yes. All flights to Belfast from Washington on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

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

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

Yes momondo offers price alerts on flights to Belfast from Washington. 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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Find better results for your trip to the United Kingdom

Fly into one of these airports located in Belfast

Airports listed have a maximum distance of 12.2 mi from Belfast
Belfast Intl Airport
Belfast City Airport