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.

£210 Cheap Flights from Washington to Northern Ireland in 2026

Find the cheapest flights from Washington to Northern Ireland

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

19:00 - 21:05SEA Seattle/Tacoma Intl-BFS Belfast Intl

18h 05m2 stops Reykjavik Keflavik Intl London Gatwick

08:20 - 20:40BFS Belfast Intl-SEA Seattle/Tacoma Intl

20h 20m2 stops London Gatwick Reykjavik Keflavik Intl

£672Multiple Airlines

Tue, 22 Sep - Tue, 29 Sep

18:45 - 18:40SEA Seattle/Tacoma Intl-BHD Belfast City

15h 55m1 stop London Heathrow

09:15 - 16:50BHD Belfast City-SEA Seattle/Tacoma Intl

15h 35m1 stop London Heathrow

£672British Airways

Sun, 15 Nov - Wed, 18 Nov

17:45 - 16:50PDX Portland-BHD Belfast City

15h 05m1 stop London Heathrow

16:55 - 15:50BHD Belfast City-PDX Portland

30h 55m1 stop London Heathrow

£679British Airways

Sun, 31 Jan - Tue, 2 Feb

17:45 - 16:50PDX Portland-BHD Belfast City

15h 05m1 stop London Heathrow

16:55 - 15:50BHD Belfast City-PDX Portland

30h 55m1 stop London Heathrow

£680British Airways

Sun, 31 Jan - Tue, 2 Feb

20:20 - 19:25SEA Seattle/Tacoma Intl-BHD Belfast City

15h 05m1 stop London Heathrow

12:45 - 18:25BHD Belfast City-SEA Seattle/Tacoma Intl

13h 40m1 stop London Heathrow

£700British Airways

Mon, 5 Oct - Thu, 22 Oct

20:20 - 19:25SEA Seattle/Tacoma Intl-BHD Belfast City

15h 05m1 stop London Heathrow

12:45 - 18:25BHD Belfast City-SEA Seattle/Tacoma Intl

13h 40m1 stop London Heathrow

£707British Airways

Mon, 5 Oct - Thu, 22 Oct

19:00 - 23:20SEA Seattle/Tacoma Intl-BFS Belfast Intl

20h 20m3 stops Reykjavik Keflavik Intl Glasgow Intl London Luton

06:15 - 20:40BFS Belfast Intl-SEA Seattle/Tacoma Intl

22h 25m2 stops London Gatwick Reykjavik Keflavik Intl

£709Multiple Airlines

Tue, 22 Sep - Tue, 29 Sep

15:14 - 15:30SEA Seattle/Tacoma Intl-BHD Belfast City

16h 16m2 stops Chicago O'Hare Intl London Heathrow

14:20 - 11:35BHD Belfast City-SEA Seattle/Tacoma Intl

29h 15m1 stop London Heathrow

£719American Airlines

Mon, 5 Oct - Thu, 22 Oct

10:31 - 15:30SEA Seattle/Tacoma Intl-BHD Belfast City

20h 59m2 stops Chicago O'Hare Intl London Heathrow

09:35 - 20:15BHD Belfast City-SEA Seattle/Tacoma Intl

18h 40m2 stops London Heathrow Chicago O'Hare Intl

£727British Airways

Mon, 5 Oct - Thu, 22 Oct

10:31 - 12:55SEA Seattle/Tacoma Intl-BHD Belfast City

18h 24m2 stops Chicago O'Hare Intl London Heathrow

12:45 - 00:36BHD Belfast City-SEA Seattle/Tacoma Intl

19h 51m2 stops London Heathrow Chicago O'Hare Intl

£734British Airways

Mon, 5 Oct - Thu, 22 Oct

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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

15 Nov

SEA18:45Seattle/Tacoma Intl

15h 55m

1 stop

BHD18:40Belfast City

18 Nov

BHD09:15Belfast City

15h 35m

1 stop

SEA16:50Seattle/Tacoma Intl

£672

British Airways

31 Jan

PDX17:45Portland

15h 05m

1 stop

BHD16:50Belfast City

2 Feb

BHD16:55Belfast City

30h 55m

1 stop

PDX15:50Portland

£679

British Airways

31 Jan

PDX17:45Portland

15h 05m

1 stop

BHD16:50Belfast City

2 Feb

BHD16:55Belfast City

30h 55m

1 stop

PDX15:50Portland

£680

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

5 Oct

SEA15:14Seattle/Tacoma Intl

16h 16m

2 stops

BHD15:30Belfast City

22 Oct

BHD14:20Belfast City

29h 15m

1 stop

SEA11:35Seattle/Tacoma Intl

£719

American Airlines

29 Jan

PDX13:12Portland

17h 03m

2 stops

BHD14:15Belfast City

7 Feb

BHD06:30Belfast City

17h 20m

1 stop

PDX15:50Portland

£755

American Airlines

6 Sept

SEA20:20Seattle/Tacoma Intl

13h 20m

1 stop

BHD17:40Belfast City

13 Sept

BHD11:00Belfast City

18h 36m

2 stops

SEA21:36Seattle/Tacoma Intl

£760

momondo Fare Finder

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

Cheapest return flight

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Tue 22/9

19:00-21:05

2 stops18h 05m

Belfast Intl

Tue 29/9

08:20-20:40

2 stops20h 20m

£672

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sun 15/11

18:45-18:40

1 stop15h 55m

Belfast City

Wed 18/11

09:15-16:50

1 stop15h 35m

£672

PortlandBelfast

PDX Portland - BHD Belfast City

PDXBHD

Portland

Sun 31/1

17:45-16:50

1 stop15h 05m

Belfast City

Tue 2/2

16:55-15:50

1 stop30h 55m

£679

PortlandBelfast

PDX Portland - BHD Belfast City

PDXBHD

Portland

Sun 31/1

17:45-16:50

1 stop15h 05m

Belfast City

Tue 2/2

16:55-15:50

1 stop30h 55m

£680

Fastest return journey

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 5/10

20:20-19:25

1 stop15h 05m

Belfast City

Thu 22/10

12:45-18:25

1 stop13h 40m

£700

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 5/10

20:20-19:25

1 stop15h 05m

Belfast City

Thu 22/10

12:45-18:25

1 stop13h 40m

£707

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Tue 22/9

19:00-23:20

3 stops20h 20m

Belfast Intl

Tue 29/9

06:15-20:40

2 stops22h 25m

£709

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 5/10

15:14-15:30

2 stops16h 16m

Belfast City

Thu 22/10

14:20-11:35

1 stop29h 15m

£719

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 5/10

10:31-15:30

2 stops20h 59m

Belfast City

Thu 22/10

09:35-20:15

2 stops18h 40m

£727

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 5/10

10:31-12:55

2 stops18h 24m

Belfast City

Thu 22/10

12:45-00:36

2 stops19h 51m

£734

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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 Delta 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

Fastest flight time	12h 30m
Direct flights	None

The fastest flight from State of Washington to Northern Ireland takes 12h 30m

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.

Search flight deals

Frequently asked questions about flying from Washington to Northern Ireland

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.