What is the cheapest airline that flies from Washington to Northern Ireland?

British Airways and American Airlines are the most popular carriers operating 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.

£238 Cheap Flights from Washington to Northern Ireland in 2026

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Find the cheapest flights from Washington to Northern Ireland

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

20:20 - 18:45

SEA

BHD

14h 25m

1 stop

20:35 - 11:35

BHD

SEA

23h 00m

1 stop

£660British Airways

Mon, 5 Oct - Thu, 22 Oct

13:30 - 10:30

SEA

BHD

13h 00m

1 stop

16:35 - 11:35

BHD

SEA

27h 00m

1 stop

£673British Airways

Sun, 27 Sep - Thu, 1 Oct

19:30 - 18:45

PDX

BHD

15h 15m

1 stop

18:20 - 17:40

BHD

PDX

31h 20m

1 stop

£673British Airways

Sun, 23 Aug - Wed, 26 Aug

20:20 - 18:45

SEA

BHD

14h 25m

1 stop

20:35 - 11:35

BHD

SEA

23h 00m

1 stop

£674British Airways

Sun, 27 Sep - Thu, 1 Oct

15:10 - 15:30

SEA

BHD

16h 20m

2 stops

06:30 - 11:35

BHD

SEA

13h 05m

1 stop

£677Multiple Airlines

Mon, 5 Oct - Thu, 22 Oct

20:20 - 18:55

SEA

BHD

14h 35m

1 stop

09:40 - 21:09

BHD

SEA

19h 29m

2 stops

£682Multiple Airlines

Tue, 8 Sep - Tue, 15 Sep

15:10 - 15:30

SEA

BHD

16h 20m

2 stops

12:45 - 00:14

BHD

SEA

19h 29m

2 stops

£684Multiple Airlines

Mon, 5 Oct - Thu, 22 Oct

09:50 - 16:55

SEA

BHD

23h 05m

2 stops

09:50 - 20:29

BHD

SEA

18h 39m

2 stops

£698Delta

Tue, 8 Sep - Tue, 15 Sep

13:05 - 09:20

PDX

BHD

12h 15m

1 stop

17:30 - 11:10

BHD

PDX

25h 40m

1 stop

£853Virgin Atlantic

Sat, 1 Aug - Sat, 15 Aug

07:00 - 09:20

PDX

BHD

18h 20m

2 stops

09:50 - 11:10

BHD

PDX

33h 20m

1 stop

£856KLM

Sat, 1 Aug - Sat, 15 Aug

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

5 Oct

SEA20:20Seattle/Tacoma Intl

14h 25m

1 stop

BHD18:45Belfast City

22 Oct

BHD20:35Belfast City

23h 00m

1 stop

SEA11:35Seattle/Tacoma Intl

£660

British Airways

27 Sept

SEA13:30Seattle/Tacoma Intl

13h 00m

1 stop

BHD10:30Belfast City

1 Oct

BHD16:35Belfast City

27h 00m

1 stop

SEA11:35Seattle/Tacoma Intl

£673

British Airways

27 Sept

SEA20:20Seattle/Tacoma Intl

14h 25m

1 stop

BHD18:45Belfast City

1 Oct

BHD20:35Belfast City

23h 00m

1 stop

SEA11:35Seattle/Tacoma Intl

£674

Aer Lingus flights from State of Washington to Northern Ireland

Our best Aer Lingus deals on State of Washington to Northern Ireland flight tickets

Aer Lingus

3 Jul

SEA19:10Seattle/Tacoma Intl

17h 45m

2 stops

BHD20:55Belfast City

10 Aug

BHD17:05Belfast City

32h 05m

2 stops

SEA17:10Seattle/Tacoma Intl

£961

Aer Lingus

28 May

SEA19:10Seattle/Tacoma Intl

32h 45m

2 stops

BHD11:55Belfast City

1 Jun

BHD17:25Belfast City

31h 45m

2 stops

SEA17:10Seattle/Tacoma Intl

£997

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 - BHD

SEABHD

Seattle/Tacoma Intl

Mon 5/10

20:20-18:45

1 stop14h 25m

Belfast City

Thu 22/10

20:35-11:35

1 stop23h 00m

£660

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 27/9

13:30-10:30

1 stop13h 00m

Belfast City

Thu 1/10

16:35-11:35

1 stop27h 00m

£673

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sun 23/8

19:30-18:45

1 stop15h 15m

Belfast City

Wed 26/8

18:20-17:40

1 stop31h 20m

£673

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 27/9

20:20-18:45

1 stop14h 25m

Belfast City

Thu 1/10

20:35-11:35

1 stop23h 00m

£674

Fastest return journey

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 5/10

15:10-15:30

2 stops16h 20m

Belfast City

Thu 22/10

06:30-11:35

1 stop13h 05m

£677

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 8/9

20:20-18:55

1 stop14h 35m

Belfast City

Tue 15/9

09:40-21:09

2 stops19h 29m

£682

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 5/10

15:10-15:30

2 stops16h 20m

Belfast City

Thu 22/10

12:45-00:14

2 stops19h 29m

£684

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 8/9

09:50-16:55

2 stops23h 05m

Belfast City

Tue 15/9

09:50-20:29

2 stops18h 39m

£698

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sat 1/8

13:05-09:20

1 stop12h 15m

Belfast City

Sat 15/8

17:30-11:10

1 stop25h 40m

£853

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sat 1/8

07:00-09:20

2 stops18h 20m

Belfast City

Sat 15/8

09:50-11:10

1 stop33h 20m

£856

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

Prices

Airlines

What is the cheapest month to fly to Northern Ireland?

In general, July is the cheapest month to fly from State of Washington to Northern Ireland. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £0. If you’re not able to fly to Northern Ireland in July, then January is your next best option. Flight prices from State of Washington to Northern Ireland during January average around £0.

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	13h 00m
Direct flights	None

The fastest flight from State of Washington to Northern Ireland takes 13h 00m

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.