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Cheap flights from Northern Ireland to Washington from $840

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Northern Ireland to Washington departing on 1/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
12:25 pm - 4:55 pm
BHD
-
SEA
12h 30m1 stop
British Airways Logo
2:04 pm - 2:15 pm
SEA
-
BHD
40h 11m2 stops
$840British Airways
Wed, Jan 28 - Sun, Feb 1
British Airways Logo
12:25 pm - 4:55 pm
BHD
-
SEA
12h 30m1 stop
British Airways Logo
2:04 pm - 10:40 am
SEA
-
BHD
36h 36m2 stops
$841British Airways
Wed, Jan 28 - Sun, Feb 1
British Airways Logo
6:35 am - 1:14 pm
BHD
-
SEA
38h 39m2 stops
British Airways Logo
2:04 pm - 2:15 pm
SEA
-
BHD
40h 11m2 stops
$845British Airways
Wed, Jan 28 - Sun, Feb 1
British Airways Logo
6:35 am - 4:55 pm
BHD
-
SEA
18h 20m1 stop
British Airways Logo
6:50 pm - 4:50 pm
SEA
-
BHD
14h 00m1 stop
$875British Airways
Wed, Feb 4 - Sun, Feb 8
British Airways Logo
11:25 am - 4:55 pm
BHD
-
SEA
13h 30m1 stop
British Airways Logo
6:50 pm - 4:50 pm
SEA
-
BHD
14h 00m1 stop
$879British Airways
Wed, Jan 28 - Sun, Feb 1
British Airways Logo
6:35 am - 10:07 pm
BHD
-
SEA
23h 32m2 stops
British Airways Logo
8:04 am - 10:20 am
SEA
-
BHD
18h 16m2 stops
$886British Airways
Wed, Feb 4 - Sun, Feb 8
Multiple Airlines Logo
6:25 pm - 3:40 pm
BFS
-
SEA
29h 15m3 stops
Multiple Airlines Logo
2:35 pm - 8:20 pm
SEA
-
BFS
21h 45m2 stops
$1,059Multiple Airlines
Sun, Jan 25 - Sun, Feb 1
Multiple Airlines Logo
7:10 am - 5:00 pm
BFS
-
SEA
17h 50m2 stops
Multiple Airlines Logo
2:35 pm - 8:20 pm
SEA
-
BFS
21h 45m2 stops
$1,131Multiple Airlines
Sun, Jan 25 - Sun, Feb 1
Multiple Airlines Logo
10:45 pm - 3:40 pm
BFS
-
SEA
24h 55m3 stops
Multiple Airlines Logo
2:35 pm - 9:55 pm
SEA
-
BFS
23h 20m3 stops
$1,148Multiple Airlines
Sun, Jan 25 - Sun, Feb 1

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
Jan 28
BHD12:25 pmBelfast City
12h 30m
1 stop
SEA4:55 pmSeattle/Tacoma Intl
Feb 1
SEA2:04 pmSeattle/Tacoma Intl
40h 11m
2 stops
BHD2:15 pmBelfast City
$840
Find similar
British Airways
Jan 28
BHD11:25 amBelfast City
13h 30m
1 stop
SEA4:55 pmSeattle/Tacoma Intl
Feb 1
SEA2:04 pmSeattle/Tacoma Intl
40h 11m
2 stops
BHD2:15 pmBelfast City
$841
Find similar
British Airways
Feb 4
BHD11:25 amBelfast City
13h 30m
1 stop
SEA4:55 pmSeattle/Tacoma Intl
Feb 8
SEA8:04 amSeattle/Tacoma Intl
21h 51m
2 stops
BHD1:55 pmBelfast City
$875
Find similar

KLM flights from Northern Ireland to State of Washington

Our best KLM deals on Northern Ireland to State of Washington flight tickets
KLM
Mar 28
BHD5:20 pmBelfast City
29h 31m
2 stops
SEA3:51 pmSeattle/Tacoma Intl
Apr 10
SEA8:25 amSeattle/Tacoma Intl
24h 30m
2 stops
BHD4:55 pmBelfast City
$1,450
Find similar
KLM
Mar 28
BHD5:20 pmBelfast City
29h 31m
2 stops
SEA3:51 pmSeattle/Tacoma Intl
Apr 10
SEA2:05 pmSeattle/Tacoma Intl
18h 50m
1 stop
BHD4:55 pmBelfast City
$1,528
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Northern Ireland to State of Washington that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated December 11, 2025.
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

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 1/28

12:25 pm-4:55 pm

1 stop12h 30m

Seattle/Tacoma Intl

Sun 2/1

2:04 pm-2:15 pm

2 stops40h 11m

$840

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 1/28

12:25 pm-4:55 pm

1 stop12h 30m

Seattle/Tacoma Intl

Sun 2/1

2:04 pm-10:40 am

2 stops36h 36m

$841

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 1/28

6:35 am-1:14 pm

2 stops38h 39m

Seattle/Tacoma Intl

Sun 2/1

2:04 pm-2:15 pm

2 stops40h 11m

$845

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 2/4

6:35 am-4:55 pm

1 stop18h 20m

Seattle/Tacoma Intl

Sun 2/8

6:50 pm-4:50 pm

1 stop14h 00m

$875

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 1/28

11:25 am-4:55 pm

1 stop13h 30m

Seattle/Tacoma Intl

Sun 2/1

6:50 pm-4:50 pm

1 stop14h 00m

$879

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 2/4

6:35 am-10:07 pm

2 stops23h 32m

Seattle/Tacoma Intl

Sun 2/8

8:04 am-10:20 am

2 stops18h 16m

$886

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sun 1/25

6:25 pm-3:40 pm

3 stops29h 15m

Seattle/Tacoma Intl

Sun 2/1

2:35 pm-8:20 pm

2 stops21h 45m

$1,059

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sun 1/25

7:10 am-5:00 pm

2 stops17h 50m

Seattle/Tacoma Intl

Sun 2/1

2:35 pm-8:20 pm

2 stops21h 45m

$1,131

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sun 1/25

10:45 pm-3:40 pm

3 stops24h 55m

Seattle/Tacoma Intl

Sun 2/1

2:35 pm-9:55 pm

3 stops23h 20m

$1,148

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 12/29

9:50 pm-11:45 am

3 stops45h 55m

$1,037

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
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See travel insights to Washington from

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

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

You could potentially save up to 8% 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

12h 30m

Direct flights

None
The fastest flight from Northern Ireland to State of Washington takes 12h 30m
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.

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