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

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

When did momondo last update prices for flights from Northern Ireland to Washington?

Prices for flights from Northern Ireland to Washington are refreshed on a daily basis.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Northern Ireland to Washington.

What documentation or ID do you need to fly to Washington?

The required travel and health documents for your Washington 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 Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$389 Cheap Flights from Northern Ireland to Washington in 2026

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Find the cheapest flights from Northern Ireland to Washington

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:15 pm - 9:40 am

BFS

SEA

45h 25m

3 stops

7:00 pm - 11:25 pm

SEA

BFS

20h 25m

3 stops

$796Multiple Airlines

Sat, May 2 - Sat, May 9

8:15 pm - 9:40 am

BFS

SEA

45h 25m

3 stops

7:00 pm - 8:50 pm

SEA

BFS

17h 50m

2 stops

$884Multiple Airlines

Sat, May 2 - Sat, May 9

10:05 am - 6:25 pm

BHD

SEA

16h 20m

1 stop

1:19 pm - 5:40 pm

SEA

BHD

20h 21m

2 stops

$942British Airways

Wed, Apr 22 - Sun, Apr 26

6:30 am - 7:24 pm

BHD

SEA

20h 54m

2 stops

6:24 am - 12:55 pm

SEA

BHD

22h 31m

2 stops

$947British Airways

Fri, Sep 11 - Mon, Sep 14

10:05 am - 6:25 pm

BHD

SEA

16h 20m

1 stop

8:20 pm - 7:35 am

SEA

BHD

27h 15m

1 stop

$953British Airways

Wed, Apr 22 - Sun, Apr 26

6:20 am - 8:40 pm

BFS

SEA

22h 20m

2 stops

7:00 pm - 10:40 pm

SEA

BFS

19h 40m

2 stops

$967Multiple Airlines

Sat, May 2 - Sat, May 9

10:05 am - 6:25 pm

BHD

SEA

16h 20m

1 stop

1:19 pm - 5:40 pm

SEA

BHD

20h 21m

2 stops

$969British Airways

Wed, Apr 22 - Sun, Apr 26

10:05 am - 6:25 pm

BHD

SEA

16h 20m

1 stop

8:20 pm - 6:45 pm

SEA

BHD

14h 25m

1 stop

$972British Airways

Wed, Apr 22 - Sun, Apr 26

11:35 am - 12:36 am

BHD

SEA

21h 01m

2 stops

8:20 pm - 8:35 pm

SEA

BHD

16h 15m

1 stop

$975British Airways

Wed, May 6 - Sun, May 10

9:35 am - 5:29 pm

BHD

SEA

39h 54m

2 stops

6:24 am - 12:55 pm

SEA

BHD

22h 31m

2 stops

$977British Airways

Fri, Sep 11 - Mon, Sep 14

British Airways flights from Northern Ireland to State of Washington

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

British Airways

Apr 22

BHD10:05 amBelfast City

16h 20m

1 stop

SEA6:25 pmSeattle/Tacoma Intl

Apr 26

SEA1:19 pmSeattle/Tacoma Intl

20h 21m

2 stops

BHD5:40 pmBelfast City

$942

British Airways

Sep 11

BHD6:30 amBelfast City

20h 54m

2 stops

SEA7:24 pmSeattle/Tacoma Intl

Sep 14

SEA6:24 amSeattle/Tacoma Intl

22h 31m

2 stops

BHD12:55 pmBelfast City

$947

British Airways

Apr 22

BHD10:05 amBelfast City

16h 20m

1 stop

SEA6:25 pmSeattle/Tacoma Intl

Apr 26

SEA8:20 pmSeattle/Tacoma Intl

27h 15m

1 stop

BHD7:35 amBelfast City

$953

momondo Fare Finder

Use the filters below to find and compare flights from Northern Ireland to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sat 5/2

8:15 pm-9:40 am

3 stops45h 25m

Seattle/Tacoma Intl

Sat 5/9

7:00 pm-11:25 pm

3 stops20h 25m

$796

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sat 5/2

8:15 pm-9:40 am

3 stops45h 25m

Seattle/Tacoma Intl

Sat 5/9

7:00 pm-8:50 pm

2 stops17h 50m

$884

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/22

10:05 am-6:25 pm

1 stop16h 20m

Seattle/Tacoma Intl

Sun 4/26

1:19 pm-5:40 pm

2 stops20h 21m

$942

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Fri 9/11

6:30 am-7:24 pm

2 stops20h 54m

Seattle/Tacoma Intl

Mon 9/14

6:24 am-12:55 pm

2 stops22h 31m

$947

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/22

10:05 am-6:25 pm

1 stop16h 20m

Seattle/Tacoma Intl

Sun 4/26

8:20 pm-7:35 am

1 stop27h 15m

$953

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sat 5/2

6:20 am-8:40 pm

2 stops22h 20m

Seattle/Tacoma Intl

Sat 5/9

7:00 pm-10:40 pm

2 stops19h 40m

$967

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/22

10:05 am-6:25 pm

1 stop16h 20m

Seattle/Tacoma Intl

Sun 4/26

1:19 pm-5:40 pm

2 stops20h 21m

$969

Quickest round-trip

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/22

10:05 am-6:25 pm

1 stop16h 20m

Seattle/Tacoma Intl

Sun 4/26

8:20 pm-6:45 pm

1 stop14h 25m

$972

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 5/6

11:35 am-12:36 am

2 stops21h 01m

Seattle/Tacoma Intl

Sun 5/10

8:20 pm-8:35 pm

1 stop16h 15m

$975

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Fri 9/11

9:35 am-5:29 pm

2 stops39h 54m

Seattle/Tacoma Intl

Mon 9/14

6:24 am-12:55 pm

2 stops22h 31m

$977

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 Northern Ireland to State of Washington

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

Can stopping save me money on Northern Ireland to State of Washington flights?

You could potentially save up to 16% on your flight if you consider stops on a Northern Ireland to State of Washington flight.

Cheap Northern Ireland to State of Washington flight deals and tips

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

Fastest flight time	13h 05m
Direct flights	None

The fastest flight from Northern Ireland to State of Washington takes 13h 05m

There are no direct flights from Northern Ireland to State of Washington. There are no popular flight routes from Northern Ireland to State of Washington.

Search flight deals

When did momondo last update prices for flights from Northern Ireland to Washington?
Prices for flights from Northern Ireland to Washington are refreshed on a daily basis.
How old do you have to be to fly from Northern Ireland to Washington?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Northern Ireland to Washington.
What documentation or ID do you need to fly to Washington?
The required travel and health documents for your Washington 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 Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

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

It is quick and easy to find Northern Ireland to Washington flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington that suits you.

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

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

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

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 Washington from Northern Ireland.

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

Of course. momondo tracks the price of Northern Ireland to Washington flights. All you need is a valid email address and we will do the rest; it is that quick and easy.