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Cheap flights from Washington to Northern Ireland from £203

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 Northern Ireland departing on 20/10. 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

Multiple Airlines Logo
14:35 - 20:25SEA-BFS
21h 50m2 stops
Multiple Airlines Logo
07:05 - 17:00BFS-SEA
17h 55m2 stops
£455Multiple Airlines
Find Deal
Thu, 6 Nov - Thu, 13 Nov
Multiple Airlines Logo
12:07 - 14:15PDX-BHD
19h 08m2 stops
Multiple Airlines Logo
11:35 - 23:13BHD-PDX
18h 38m2 stops
£534Multiple Airlines
Find Deal
Sat, 21 Mar - Sat, 28 Mar
American Airlines Logo
14:52 - 15:40SEA-BHD
16h 48m2 stops
American Airlines Logo
14:50 - 12:30BHD-SEA
28h 40m1 stop
£545American Airlines
Find Deal
Mon, 20 Oct - Mon, 27 Oct
American Airlines Logo
20:20 - 17:30SEA-BHD
13h 10m1 stop
American Airlines Logo
14:50 - 12:30BHD-SEA
28h 40m1 stop
£569American Airlines
Find Deal
Mon, 20 Oct - Mon, 27 Oct
British Airways Logo
17:45 - 16:50PDX-BHD
15h 05m1 stop
British Airways Logo
17:45 - 15:55BHD-PDX
30h 10m1 stop
£573British Airways
Find Deal
Sun, 1 Mar - Thu, 5 Mar
Finnair Logo
13:35 - 14:15SEA-BHD
16h 40m1 stop
Finnair Logo
11:25 - 17:55BHD-SEA
13h 30m1 stop
£579Finnair
Find Deal
Sat, 7 Mar - Tue, 17 Mar
British Airways Logo
18:50 - 16:35SEA-BHD
13h 45m1 stop
British Airways Logo
15:10 - 16:55BHD-SEA
33h 45m1 stop
£579British Airways
Find Deal
Wed, 3 Dec - Sun, 7 Dec
Delta Logo
22:05 - 16:50PDX-BHD
34h 45m2 stops
Delta Logo
17:20 - 19:18BHD-PDX
33h 58m2 stops
£579Delta
Find Deal
Mon, 22 Dec - Thu, 8 Jan
Delta Logo
13:45 - 21:00PDX-BHD
47h 15m2 stops
Delta Logo
17:20 - 22:39BHD-PDX
37h 19m2 stops
£584Delta
Find Deal
Wed, 24 Dec - Thu, 8 Jan
Finnair Logo
06:10 - 14:15PDX-BHD
48h 05m2 stops
Finnair Logo
11:05 - 21:11BHD-PDX
42h 06m2 stops
£1,559Finnair
Find Deal
Sun, 21 Dec - Thu, 8 Jan

British Airways flights from State of Washington to Northern Ireland

Our best British Airways deals on State of Washington to Northern Ireland flight tickets
British Airways
1 Mar
PDX17:45Portland
15h 05m
1 stop
BHD16:50Belfast City
5 Mar
BHD17:45Belfast City
30h 10m
1 stop
PDX15:55Portland
£573
Find similar
British Airways
3 Dec
SEA18:50Seattle/Tacoma Intl
13h 45m
1 stop
BHD16:35Belfast City
7 Dec
BHD15:10Belfast City
33h 45m
1 stop
SEA16:55Seattle/Tacoma Intl
£579
Find similar
British Airways
3 Dec
SEA18:50Seattle/Tacoma Intl
28h 40m
1 stop
BHD07:30Belfast City
7 Dec
BHD15:10Belfast City
33h 45m
1 stop
SEA16:55Seattle/Tacoma Intl
£586
Find similar

American Airlines flights from State of Washington to Northern Ireland

Our best American Airlines deals on State of Washington to Northern Ireland flight tickets
American Airlines
20 Oct
SEA14:52Seattle/Tacoma Intl
16h 48m
2 stops
BHD15:40Belfast City
27 Oct
BHD14:50Belfast City
28h 40m
1 stop
SEA12:30Seattle/Tacoma Intl
£545
Find similar
American Airlines
20 Oct
SEA20:20Seattle/Tacoma Intl
13h 10m
1 stop
BHD17:30Belfast City
27 Oct
BHD14:50Belfast City
28h 40m
1 stop
SEA12:30Seattle/Tacoma Intl
£569
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from State of Washington to Northern Ireland 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 23 September 2025.
Use the filters below to find and compare flights from Washington to Northern Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Thu 6/11

14:35-20:25

2 stops21h 50m

Belfast Intl

Thu 13/11

07:05-17:00

2 stops17h 55m

£455

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sat 21/3

12:07-14:15

2 stops19h 08m

Belfast City

Sat 28/3

11:35-23:13

2 stops18h 38m

£534

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 20/10

14:52-15:40

2 stops16h 48m

Belfast City

Mon 27/10

14:50-12:30

1 stop28h 40m

£545

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 20/10

20:20-17:30

1 stop13h 10m

Belfast City

Mon 27/10

14:50-12:30

1 stop28h 40m

£569

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sun 1/3

17:45-16:50

1 stop15h 05m

Belfast City

Thu 5/3

17:45-15:55

1 stop30h 10m

£573

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

£579

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 3/12

18:50-16:35

1 stop13h 45m

Belfast City

Sun 7/12

15:10-16:55

1 stop33h 45m

£579

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 22/12

22:05-16:50

2 stops34h 45m

Belfast City

Thu 8/1

17:20-19:18

2 stops33h 58m

£579

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 24/12

13:45-21:00

2 stops47h 15m

Belfast City

Thu 8/1

17:20-22:39

2 stops37h 19m

£584

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sun 21/12

06:10-14:15

2 stops48h 05m

Belfast City

Thu 8/1

11:05-21:11

2 stops42h 06m

£1,559

Flights are sorted by cheapest return flights first.

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

How to get the cheapest flight ticket from State of Washington to Northern Ireland

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 Northern Ireland?

British Airways is the most popular carrier operating from Washington to Northern Ireland

Cheap State of Washington to Northern Ireland flight deals and tips

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

Direct flights

None
There are no direct flights from State of Washington to Northern Ireland. There are no popular flight routes from State of Washington to Northern Ireland.
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  • When did momondo last update prices for flights from Washington to Northern Ireland?

    Prices for flights from Washington to Northern Ireland were last updated today.

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Northern Ireland.

  • What documentation or ID do you need to fly to Northern Ireland?

    The travel and health documents required for your trip to Northern Ireland 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 Northern Ireland. 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 Northern Ireland?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington to Northern Ireland for you.

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

Yes. momondo allows you to filter the results for Washington to Northern Ireland flights to just show those with flexible booking policies.

How can momondo help me find flights from Washington to Northern Ireland?

Once all potential Washington to Northern Ireland 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 Washington to Northern Ireland right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Northern Ireland 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 Northern Ireland

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