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.

$710 Cheap Flights from Northern Ireland to Washington in 2026

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.

6:30 am - 11:35 am

BHD

SEA

13h 05m

1 stop

7:50 pm - 6:35 pm

SEA

BHD

15h 45m

1 stop

$734British Airways

Thu, Oct 22 - Mon, Oct 26

8:35 pm - 11:35 am

BHD

SEA

23h 00m

1 stop

3:10 pm - 4:05 pm

SEA

BHD

17h 55m

2 stops

$761British Airways

Thu, Oct 22 - Mon, Oct 26

12:45 pm - 12:14 am

BHD

SEA

19h 29m

2 stops

3:10 pm - 2:15 pm

SEA

BHD

16h 05m

2 stops

$767British Airways

Thu, Oct 22 - Mon, Oct 26

6:30 am - 11:35 am

BHD

SEA

13h 05m

1 stop

5:40 pm - 9:00 am

SEA

BHD

31h 20m

2 stops

$788British Airways

Thu, Sep 17 - Mon, Sep 21

8:35 pm - 9:36 pm

BHD

SEA

33h 01m

2 stops

5:40 pm - 9:00 am

SEA

BHD

31h 20m

2 stops

$793British Airways

Thu, Sep 17 - Mon, Sep 21

2:20 pm - 11:35 am

BHD

SEA

29h 15m

1 stop

8:20 pm - 8:35 pm

SEA

BHD

16h 15m

1 stop

$798British Airways

Thu, Sep 24 - Sun, Sep 27

6:30 am - 5:10 pm

BHD

SEA

18h 40m

2 stops

6:15 am - 10:30 am

SEA

BHD

20h 15m

2 stops

$804British Airways

Thu, Sep 24 - Sun, Sep 27

7:00 am - 4:55 pm

BHD

SEA

17h 55m

2 stops

11:22 am - 2:15 pm

SEA

BHD

18h 53m

2 stops

$830British Airways

Thu, Dec 3 - Mon, Dec 7

8:20 am - 9:00 pm

BFS

SEA

44h 40m

3 stops

3:40 pm - 10:20 pm

SEA

BFS

22h 40m

3 stops

$861Multiple Airlines

Thu, Jul 16 - Wed, Jul 22

6:10 am - 8:40 pm

BFS

SEA

22h 30m

2 stops

7:00 pm - 11:05 pm

SEA

BFS

20h 05m

2 stops

$942Multiple Airlines

Thu, Sep 10 - Thu, Oct 1

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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

Oct 22

BHD6:30 amBelfast City

13h 05m

1 stop

SEA11:35 amSeattle/Tacoma Intl

Oct 26

SEA7:50 pmSeattle/Tacoma Intl

15h 45m

1 stop

BHD6:35 pmBelfast City

$734

British Airways

Oct 22

BHD8:35 pmBelfast City

23h 00m

1 stop

SEA11:35 amSeattle/Tacoma Intl

Oct 26

SEA3:10 pmSeattle/Tacoma Intl

17h 55m

2 stops

BHD4:05 pmBelfast City

$761

British Airways

Oct 22

BHD12:45 pmBelfast City

19h 29m

2 stops

SEA12:14 amSeattle/Tacoma Intl

Oct 26

SEA3:10 pmSeattle/Tacoma Intl

16h 05m

2 stops

BHD2:15 pmBelfast City

$767

KLM flights from Northern Ireland to State of Washington

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

KLM

Sep 10

BHD9:50 amBelfast City

21h 30m

2 stops

SEA11:20 pmSeattle/Tacoma Intl

Oct 1

SEA8:59 pmSeattle/Tacoma Intl

35h 56m

2 stops

BHD4:55 pmBelfast City

$924

KLM

Jul 19

BHD9:50 amBelfast City

33h 43m

1 stop

SEA11:33 amSeattle/Tacoma Intl

Jul 27

SEA5:40 pmSeattle/Tacoma Intl

31h 40m

1 stop

BHD9:20 amBelfast City

$1,031

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

Quickest round-trip

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 10/22

6:30 am-11:35 am

1 stop13h 05m

Seattle/Tacoma Intl

Mon 10/26

7:50 pm-6:35 pm

1 stop15h 45m

$734

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 10/22

8:35 pm-11:35 am

1 stop23h 00m

Seattle/Tacoma Intl

Mon 10/26

3:10 pm-4:05 pm

2 stops17h 55m

$761

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 10/22

12:45 pm-12:14 am

2 stops19h 29m

Seattle/Tacoma Intl

Mon 10/26

3:10 pm-2:15 pm

2 stops16h 05m

$767

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 9/17

6:30 am-11:35 am

1 stop13h 05m

Seattle/Tacoma Intl

Mon 9/21

5:40 pm-9:00 am

2 stops31h 20m

$788

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 9/17

8:35 pm-9:36 pm

2 stops33h 01m

Seattle/Tacoma Intl

Mon 9/21

5:40 pm-9:00 am

2 stops31h 20m

$793

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 9/24

2:20 pm-11:35 am

1 stop29h 15m

Seattle/Tacoma Intl

Sun 9/27

8:20 pm-8:35 pm

1 stop16h 15m

$798

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 9/24

6:30 am-5:10 pm

2 stops18h 40m

Seattle/Tacoma Intl

Sun 9/27

6:15 am-10:30 am

2 stops20h 15m

$804

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 12/3

7:00 am-4:55 pm

2 stops17h 55m

Seattle/Tacoma Intl

Mon 12/7

11:22 am-2:15 pm

2 stops18h 53m

$830

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 7/16

8:20 am-9:00 pm

3 stops44h 40m

Seattle/Tacoma Intl

Wed 7/22

3:40 pm-10:20 pm

3 stops22h 40m

$861

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 9/10

6:10 am-8:40 pm

2 stops22h 30m

Seattle/Tacoma Intl

Thu 10/1

7:00 pm-11:05 pm

2 stops20h 05m

$942

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 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

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

Aer Lingus is the most popular carrier operating from Northern Ireland to Washington

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

Frequently asked questions about flying 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.

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.