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.

$528 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.

6:10 am - 8:40 pm

BFS

SEA

22h 30m

2 stops

3:40 pm - 7:40 pm

SEA

BFS

20h 00m

2 stops

$966Multiple Airlines

Wed, Jun 24 - Wed, Jul 1

9:40 am - 6:25 pm

BHD

SEA

16h 45m

1 stop

11:34 am - 3:20 pm

SEA

BHD

19h 46m

2 stops

$974British Airways

Tue, Oct 6 - Tue, Oct 20

9:40 am - 12:14 am

BHD

SEA

22h 34m

2 stops

11:34 am - 3:20 pm

SEA

BHD

19h 46m

2 stops

$980Multiple Airlines

Tue, Oct 6 - Tue, Oct 20

8:25 pm - 11:35 am

BHD

SEA

23h 10m

1 stop

1:24 pm - 3:20 pm

SEA

BHD

17h 56m

2 stops

$984Multiple Airlines

Tue, Sep 1 - Tue, Sep 22

6:15 am - 3:40 pm

BFS

SEA

17h 25m

2 stops

6:05 pm - 10:25 pm

SEA

BFS

20h 20m

2 stops

$992Multiple Airlines

Tue, Jun 23 - Tue, Jun 30

9:40 am - 11:50 pm

BHD

SEA

22h 10m

2 stops

1:24 pm - 3:20 pm

SEA

BHD

17h 56m

2 stops

$1,011Multiple Airlines

Tue, Sep 1 - Tue, Sep 22

9:15 am - 4:55 pm

BHD

SEA

15h 40m

1 stop

11:42 am - 10:40 am

SEA

BHD

38h 58m

2 stops

$1,019British Airways

Wed, Nov 4 - Sun, Nov 8

6:35 am - 4:55 pm

BHD

SEA

18h 20m

1 stop

2:46 pm - 2:15 pm

SEA

BHD

39h 29m

2 stops

$1,021British Airways

Wed, Nov 4 - Sun, Nov 8

9:15 am - 11:18 pm

BHD

SEA

22h 03m

2 stops

2:46 pm - 2:15 pm

SEA

BHD

39h 29m

2 stops

$1,022British Airways

Wed, Nov 4 - Sun, Nov 8

9:35 am - 6:25 pm

BHD

SEA

16h 50m

1 stop

6:24 am - 12:55 pm

SEA

BHD

22h 31m

2 stops

$1,054British Airways

Thu, Sep 10 - 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

Oct 6

BHD9:40 amBelfast City

16h 45m

1 stop

SEA6:25 pmSeattle/Tacoma Intl

Oct 20

SEA11:34 amSeattle/Tacoma Intl

19h 46m

2 stops

BHD3:20 pmBelfast City

$974

British Airways

Nov 4

BHD9:15 amBelfast City

15h 40m

1 stop

SEA4:55 pmSeattle/Tacoma Intl

Nov 8

SEA11:42 amSeattle/Tacoma Intl

38h 58m

2 stops

BHD10:40 amBelfast City

$1,019

British Airways

Nov 4

BHD6:35 amBelfast City

18h 20m

1 stop

SEA4:55 pmSeattle/Tacoma Intl

Nov 8

SEA2:46 pmSeattle/Tacoma Intl

39h 29m

2 stops

BHD2:15 pmBelfast City

$1,021

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

Wed 6/24

6:10 am-8:40 pm

2 stops22h 30m

Seattle/Tacoma Intl

Wed 7/1

3:40 pm-7:40 pm

2 stops20h 00m

$966

Quickest round-trip

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 10/6

9:40 am-6:25 pm

1 stop16h 45m

Seattle/Tacoma Intl

Tue 10/20

11:34 am-3:20 pm

2 stops19h 46m

$974

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 10/6

9:40 am-12:14 am

2 stops22h 34m

Seattle/Tacoma Intl

Tue 10/20

11:34 am-3:20 pm

2 stops19h 46m

$980

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 9/1

8:25 pm-11:35 am

1 stop23h 10m

Seattle/Tacoma Intl

Tue 9/22

1:24 pm-3:20 pm

2 stops17h 56m

$984

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Tue 6/23

6:15 am-3:40 pm

2 stops17h 25m

Seattle/Tacoma Intl

Tue 6/30

6:05 pm-10:25 pm

2 stops20h 20m

$992

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 9/1

9:40 am-11:50 pm

2 stops22h 10m

Seattle/Tacoma Intl

Tue 9/22

1:24 pm-3:20 pm

2 stops17h 56m

$1,011

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 11/4

9:15 am-4:55 pm

1 stop15h 40m

Seattle/Tacoma Intl

Sun 11/8

11:42 am-10:40 am

2 stops38h 58m

$1,019

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 11/4

6:35 am-4:55 pm

1 stop18h 20m

Seattle/Tacoma Intl

Sun 11/8

2:46 pm-2:15 pm

2 stops39h 29m

$1,021

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 11/4

9:15 am-11:18 pm

2 stops22h 03m

Seattle/Tacoma Intl

Sun 11/8

2:46 pm-2:15 pm

2 stops39h 29m

$1,022

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 9/10

9:35 am-6:25 pm

1 stop16h 50m

Seattle/Tacoma Intl

Mon 9/14

6:24 am-12:55 pm

2 stops22h 31m

$1,054

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

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

British Airways and Aer Lingus are the most popular carriers 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.

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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.