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 are updated daily.

How many operators does momondo search for flights from Washington to Northern Ireland?

The number of operators available for flights from Washington to Northern Ireland is 1 as of May 2026.

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 required travel and health documents for your Northern Ireland trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Northern Ireland. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$321 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

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:20 pm - 7:25 pm

SEA

BHD

15h 05m

1 stop

6:30 am - 6:25 pm

BHD

SEA

19h 55m

1 stop

$891British Airways

Mon, Oct 5 - Thu, Oct 22

1:30 pm - 12:55 pm

SEA

BHD

15h 25m

1 stop

8:35 pm - 11:35 am

BHD

SEA

23h 00m

1 stop

$892British Airways

Mon, Oct 5 - Thu, Oct 22

1:30 pm - 12:55 pm

SEA

BHD

15h 25m

1 stop

4:05 pm - 6:25 pm

BHD

SEA

34h 20m

1 stop

$909British Airways

Mon, Oct 19 - Wed, Oct 21

7:30 pm - 5:40 pm

PDX

BHD

14h 10m

1 stop

8:35 pm - 5:40 pm

BHD

PDX

29h 05m

1 stop

$909British Airways

Sun, Aug 23 - Wed, Aug 26

8:20 pm - 7:40 pm

SEA

BHD

15h 20m

1 stop

8:35 pm - 11:35 am

BHD

SEA

23h 00m

1 stop

$910British Airways

Tue, Sep 8 - Thu, Sep 24

7:30 pm - 6:45 pm

PDX

BHD

15h 15m

1 stop

6:20 pm - 5:40 pm

BHD

PDX

31h 20m

1 stop

$910British Airways

Sun, Aug 23 - Wed, Aug 26

3:10 pm - 3:30 pm

SEA

BHD

16h 20m

2 stops

6:30 am - 6:25 pm

BHD

SEA

19h 55m

1 stop

$914Multiple Airlines

Mon, Oct 5 - Thu, Oct 22

1:05 pm - 9:20 am

PDX

BHD

12h 15m

1 stop

5:30 pm - 11:10 am

BHD

PDX

25h 40m

1 stop

$1,088Delta

Tue, Jul 14 - Wed, Jul 22

3:00 pm - 4:55 pm

PDX

BHD

17h 55m

2 stops

5:30 pm - 11:10 am

BHD

PDX

25h 40m

1 stop

$1,092Delta

Tue, Jul 14 - Wed, Jul 22

1:05 pm - 4:55 pm

PDX

BHD

19h 50m

1 stop

9:50 am - 11:36 am

BHD

PDX

33h 46m

2 stops

$1,105Delta

Mon, Jul 13 - Thu, Jul 23

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

Oct 5

SEA8:20 pmSeattle/Tacoma Intl

15h 05m

1 stop

BHD7:25 pmBelfast City

Oct 22

BHD6:30 amBelfast City

19h 55m

1 stop

SEA6:25 pmSeattle/Tacoma Intl

$891

British Airways

Oct 5

SEA1:30 pmSeattle/Tacoma Intl

15h 25m

1 stop

BHD12:55 pmBelfast City

Oct 22

BHD8:35 pmBelfast City

23h 00m

1 stop

SEA11:35 amSeattle/Tacoma Intl

$892

British Airways

Oct 19

SEA1:30 pmSeattle/Tacoma Intl

15h 25m

1 stop

BHD12:55 pmBelfast City

Oct 21

BHD4:05 pmBelfast City

34h 20m

1 stop

SEA6:25 pmSeattle/Tacoma Intl

$909

Delta flights from State of Washington to Northern Ireland

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

Delta

Sep 8

SEA12:00 pmSeattle/Tacoma Intl

20h 55m

2 stops

BHD4:55 pmBelfast City

Sep 21

BHD5:30 pmBelfast City

26h 17m

1 stop

SEA11:47 amSeattle/Tacoma Intl

$933

Delta

Sep 8

SEA12:00 pmSeattle/Tacoma Intl

20h 55m

2 stops

BHD4:55 pmBelfast City

Sep 21

BHD5:30 pmBelfast City

37h 56m

2 stops

SEA11:26 pmSeattle/Tacoma Intl

$943

Delta

Sep 7

SEA9:25 pmSeattle/Tacoma Intl

35h 30m

2 stops

BHD4:55 pmBelfast City

Sep 24

BHD5:30 pmBelfast City

31h 05m

1 stop

SEA4:35 pmSeattle/Tacoma Intl

$944

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 round-trip

Quickest round-trip

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

8:20 pm-7:25 pm

1 stop15h 05m

Belfast City

Thu 10/22

6:30 am-6:25 pm

1 stop19h 55m

$891

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

1:30 pm-12:55 pm

1 stop15h 25m

Belfast City

Thu 10/22

8:35 pm-11:35 am

1 stop23h 00m

$892

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/19

1:30 pm-12:55 pm

1 stop15h 25m

Belfast City

Wed 10/21

4:05 pm-6:25 pm

1 stop34h 20m

$909

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sun 8/23

7:30 pm-5:40 pm

1 stop14h 10m

Belfast City

Wed 8/26

8:35 pm-5:40 pm

1 stop29h 05m

$909

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 9/8

8:20 pm-7:40 pm

1 stop15h 20m

Belfast City

Thu 9/24

8:35 pm-11:35 am

1 stop23h 00m

$910

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sun 8/23

7:30 pm-6:45 pm

1 stop15h 15m

Belfast City

Wed 8/26

6:20 pm-5:40 pm

1 stop31h 20m

$910

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

3:10 pm-3:30 pm

2 stops16h 20m

Belfast City

Thu 10/22

6:30 am-6:25 pm

1 stop19h 55m

$914

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Tue 7/14

1:05 pm-9:20 am

1 stop12h 15m

Belfast City

Wed 7/22

5:30 pm-11:10 am

1 stop25h 40m

$1,088

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Tue 7/14

3:00 pm-4:55 pm

2 stops17h 55m

Belfast City

Wed 7/22

5:30 pm-11:10 am

1 stop25h 40m

$1,092

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 7/13

1:05 pm-4:55 pm

1 stop19h 50m

Belfast City

Thu 7/23

9:50 am-11:36 am

2 stops33h 46m

$1,105

Flights are sorted by cheapest round-trip 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?

The cheapest month to fly to Northern Ireland from State of Washington is in July. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of July, then book flights to Northern Ireland from State of Washington during January instead. Flights to Northern Ireland in January, while not as cheap as those in July, still 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 15m
Direct flights	None

The fastest flight from State of Washington to Northern Ireland takes 13h 15m

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 are updated daily.
How many operators does momondo search for flights from Washington to Northern Ireland?
The number of operators available for flights from Washington to Northern Ireland is 1 as of May 2026.
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 required travel and health documents for your Northern Ireland trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Northern Ireland. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from State of Washington to Northern Ireland

Compare and see reviews for airlines that fly from State of Washington to Northern Ireland with momondo

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom $776	Free Cancellation	Rating 6.7 7,969 reviews		Search British Airways flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington to Northern Ireland. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. All flights to Northern Ireland 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 Northern Ireland?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Northern Ireland from Washington.

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

Price alerts on flights to Northern Ireland from Washington are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.