Latest deals
Insights
FAQs
Price Alerts

Cheap flights from Washington to Northern Ireland from £295

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 7/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Washington to Northern Ireland

Cheap return flights

Logo
15:45 - 22:25SEA-BFS
22h 40m2 stops
Logo
09:40 - 20:40BFS-SEA
19h 00m2 stops
£494
Find Deal
Sat, 4 Oct - Sat, 11 Oct
Logo
19:00 - 20:25SEA-BHD
17h 25m2 stops
Logo
07:00 - 20:40BHD-SEA
21h 40m2 stops
£514
Find Deal
Sat, 4 Oct - Sat, 11 Oct
Logo
19:00 - 19:40SEA-BFS
16h 40m2 stops
Logo
09:40 - 20:40BFS-SEA
19h 00m2 stops
£531
Find Deal
Wed, 24 Sep - Sat, 4 Oct
Logo
15:45 - 20:35SEA-BHD
20h 50m2 stops
Logo
11:10 - 20:40BHD-SEA
17h 30m2 stops
£538
Find Deal
Wed, 24 Sep - Sat, 4 Oct
British Airways Logo
13:30 - 11:30SEA-BHD
14h 00m1 stop
British Airways Logo
11:05 - 17:55BHD-SEA
13h 50m1 stop
£543British Airways
Find Deal
Sun, 19 Oct - Thu, 30 Oct
British Airways Logo
19:50 - 16:35SEA-BHD
13h 45m1 stop
British Airways Logo
19:25 - 16:55BHD-SEA
29h 30m1 stop
£558British Airways
Find Deal
Wed, 29 Oct - Wed, 5 Nov
American Airlines Logo
00:59 - 10:15SEA-BHD
25h 16m2 stops
American Airlines Logo
15:05 - 16:55BHD-SEA
33h 50m1 stop
£694American Airlines
Find Deal
Tue, 25 Nov - Tue, 2 Dec
American Airlines Logo
00:59 - 10:15SEA-BHD
25h 16m2 stops
American Airlines Logo
15:05 - 21:56BHD-SEA
38h 51m2 stops
£708American Airlines
Find Deal
Tue, 25 Nov - Tue, 2 Dec
KLM Logo
11:15 - 16:50SEA-BHD
21h 35m2 stops
KLM Logo
06:30 - 11:50BHD-SEA
13h 20m1 stop
£742KLM
Find Deal
Wed, 3 Dec - Sun, 7 Dec
KLM Logo
13:45 - 16:50SEA-BHD
19h 05m2 stops
KLM Logo
06:30 - 16:20BHD-SEA
17h 50m2 stops
£821KLM
Find Deal
Thu, 27 Nov - Tue, 2 Dec

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
19 Oct
SEA13:30Seattle/Tacoma Intl
14h 00m
1 stop
BHD11:30Belfast City
30 Oct
BHD11:05Belfast City
13h 50m
1 stop
SEA17:55Seattle/Tacoma Intl
£543
Find similar
British Airways
29 Oct
SEA19:50Seattle/Tacoma Intl
13h 45m
1 stop
BHD16:35Belfast City
5 Nov
BHD19:25Belfast City
29h 30m
1 stop
SEA16:55Seattle/Tacoma Intl
£558
Find similar
British Airways
26 Nov
SEA18:50Seattle/Tacoma Intl
16h 20m
1 stop
BHD19:10Belfast City
2 Dec
BHD19:25Belfast City
34h 31m
2 stops
SEA21:56Seattle/Tacoma Intl
£561
Find similar

KLM flights from State of Washington to Northern Ireland

Our best KLM deals on State of Washington to Northern Ireland flight tickets
KLM
3 Dec
SEA11:15Seattle/Tacoma Intl
21h 35m
2 stops
BHD16:50Belfast City
7 Dec
BHD06:30Belfast City
13h 20m
1 stop
SEA11:50Seattle/Tacoma Intl
£742
Find similar
KLM
27 Nov
SEA13:45Seattle/Tacoma Intl
19h 05m
2 stops
BHD16:50Belfast City
2 Dec
BHD06:30Belfast City
17h 50m
2 stops
SEA16:20Seattle/Tacoma Intl
£821
Find similar
KLM
27 Nov
SEA13:45Seattle/Tacoma Intl
19h 05m
2 stops
BHD16:50Belfast City
1 Dec
BHD06:30Belfast City
17h 50m
2 stops
SEA16:20Seattle/Tacoma Intl
£866
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 8 August 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

Sat 4/10

15:45-22:25

2 stops22h 40m

Belfast Intl

Sat 11/10

09:40-20:40

2 stops19h 00m

£494

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 4/10

19:00-20:25

2 stops17h 25m

Belfast City

Sat 11/10

07:00-20:40

2 stops21h 40m

£514

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Wed 24/9

19:00-19:40

2 stops16h 40m

Belfast Intl

Sat 4/10

09:40-20:40

2 stops19h 00m

£531

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 24/9

15:45-20:35

2 stops20h 50m

Belfast City

Sat 4/10

11:10-20:40

2 stops17h 30m

£538

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 19/10

13:30-11:30

1 stop14h 00m

Belfast City

Thu 30/10

11:05-17:55

1 stop13h 50m

£543

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 29/10

19:50-16:35

1 stop13h 45m

Belfast City

Wed 5/11

19:25-16:55

1 stop29h 30m

£558

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 25/11

00:59-10:15

2 stops25h 16m

Belfast City

Tue 2/12

15:05-16:55

1 stop33h 50m

£694

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 25/11

00:59-10:15

2 stops25h 16m

Belfast City

Tue 2/12

15:05-21:56

2 stops38h 51m

£708

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 3/12

11:15-16:50

2 stops21h 35m

Belfast City

Sun 7/12

06:30-11:50

1 stop13h 20m

£742

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 27/11

13:45-16:50

2 stops19h 05m

Belfast City

Tue 2/12

06:30-16:20

2 stops17h 50m

£821

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 and Aer Lingus are the most popular carriers 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

Best price found

£295

Fastest flight time

12h 55m

Direct flights

None

Airports in Northern Ireland

2 airports
The best one-way flight to Northern Ireland from State of Washington in the past 72 hours is £295. The best return flight deal from State of Washington to Northern Ireland found on momondo in the last 72 hours is £494.
The fastest flight from State of Washington to Northern Ireland takes 12h 55m
There are no direct flights from State of Washington to Northern Ireland. Popular non-direct routes for this connection are Seattle/Tacoma Intl Airport - Belfast Intl Airport, Portland Airport - Belfast City Airport and Portland Airport - Belfast Intl Airport.
There are 2 airports near Northern Ireland: Belfast Intl (BFS), Belfast City (BHD)
Search flight deals

  • 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.

An easier way to manage your Northern Ireland trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 13/8
Wed 20/8
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Northern Ireland

Popular Cities in Northern Ireland

Popular flights according to clicks in the last 7 days on momondo
Flights to Londonfrom £27
Flights to Manchesterfrom £31
Flights to Birminghamfrom £33
Flights to Edinburghfrom £28
Flights to Belfastfrom £29
Flights to Glasgowfrom £29
Flights to Bristolfrom £34
Flights to Newcastle upon Tynefrom £33
Flights to Aberdeenfrom £51
Flights to Liverpoolfrom £29
Flights to Leedsfrom £34
Flights to Invernessfrom £35