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Cheap flights from Northern Ireland to Washington from $802

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 3/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:30 am - 6:00 pm
BFS
-
SEA
18h 30m
2 stops
Multiple Airlines Logo
3:35 pm - 5:50 pm
SEA
-
BFS
19h 15m
2 stops
$802Multiple Airlines
Thu, Mar 19 - Thu, Mar 26
British Airways Logo
6:35 am - 11:30 am
BHD
-
SEA
12h 55m
1 stop
British Airways Logo
7:50 pm - 6:35 pm
SEA
-
BHD
15h 45m
1 stop
$897British Airways
Sat, Mar 7 - Mon, Mar 9
British Airways Logo
6:35 am - 11:30 am
BHD
-
SEA
12h 55m
1 stop
British Airways Logo
7:21 am - 2:15 pm
SEA
-
BHD
23h 54m
2 stops
$898British Airways
Sat, Mar 7 - Mon, Mar 9
British Airways Logo
6:35 am - 11:04 pm
BHD
-
SEA
24h 29m
2 stops
British Airways Logo
7:21 am - 10:40 am
SEA
-
BHD
20h 19m
2 stops
$903British Airways
Sat, Mar 7 - Mon, Mar 9
Multiple Airlines Logo
6:30 am - 10:25 am
BFS
-
SEA
34h 55m
3 stops
Multiple Airlines Logo
3:40 pm - 9:00 pm
SEA
-
BFS
21h 20m
2 stops
$904Multiple Airlines
Sun, Mar 22 - Sun, Mar 29
Multiple Airlines Logo
6:30 am - 10:25 am
BFS
-
SEA
34h 55m
3 stops
Multiple Airlines Logo
3:40 pm - 9:55 pm
SEA
-
BFS
22h 15m
3 stops
$953Multiple Airlines
Sun, Mar 22 - Sun, Mar 29
Multiple Airlines Logo
8:25 pm - 11:35 am
BHD
-
SEA
23h 10m
1 stop
Multiple Airlines Logo
1:35 pm - 10:45 am
SEA
-
BHD
13h 10m
1 stop
$964Multiple Airlines
Tue, Jun 30 - Tue, Jul 14
American Airlines Logo
6:30 am - 8:31 pm
BHD
-
SEA
22h 01m
2 stops
American Airlines Logo
1:18 pm - 3:40 pm
SEA
-
BHD
18h 22m
2 stops
$1,016American Airlines
Thu, Jul 2 - Wed, Jul 15
American Airlines Logo
4:15 pm - 6:25 pm
BHD
-
SEA
34h 10m
1 stop
American Airlines Logo
8:20 pm - 7:50 pm
SEA
-
BHD
15h 30m
1 stop
$1,030American Airlines
Sat, Jun 27 - Wed, Jul 15
American Airlines Logo
6:30 am - 8:31 pm
BHD
-
SEA
22h 01m
2 stops
American Airlines Logo
3:34 pm - 6:45 pm
SEA
-
BHD
19h 11m
2 stops
$1,032American Airlines
Thu, Jul 2 - Thu, Jul 16

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
Mar 7
BHD6:35 amBelfast City
12h 55m
1 stop
SEA11:30 amSeattle/Tacoma Intl
Mar 9
SEA7:21 amSeattle/Tacoma Intl
20h 19m
2 stops
BHD10:40 amBelfast City
$897
British Airways
Mar 7
BHD6:35 amBelfast City
12h 55m
1 stop
SEA11:30 amSeattle/Tacoma Intl
Mar 9
SEA7:50 pmSeattle/Tacoma Intl
15h 45m
1 stop
BHD6:35 pmBelfast City
$898
British Airways
Mar 7
BHD6:35 amBelfast City
24h 29m
2 stops
SEA11:04 pmSeattle/Tacoma Intl
Mar 9
SEA7:21 amSeattle/Tacoma Intl
20h 19m
2 stops
BHD10:40 amBelfast City
$903

American Airlines flights from Northern Ireland to State of Washington

Our best American Airlines deals on Northern Ireland to State of Washington flight tickets
American Airlines
Jul 2
BHD6:30 amBelfast City
22h 01m
2 stops
SEA8:31 pmSeattle/Tacoma Intl
Jul 16
SEA8:20 pmSeattle/Tacoma Intl
15h 05m
1 stop
BHD7:25 pmBelfast City
$1,016
American Airlines
Jun 27
BHD4:15 pmBelfast City
34h 10m
1 stop
SEA6:25 pmSeattle/Tacoma Intl
Jul 14
SEA1:18 pmSeattle/Tacoma Intl
21h 37m
2 stops
BHD6:55 pmBelfast City
$1,030
American Airlines
Jul 2
BHD6:30 amBelfast City
22h 01m
2 stops
SEA8:31 pmSeattle/Tacoma Intl
Jul 16
SEA3:34 pmSeattle/Tacoma Intl
19h 11m
2 stops
BHD6:45 pmBelfast City
$1,032

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 February 5, 2026.
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

BFS - SEA

BFSSEA

Belfast Intl

Thu 3/19

6:30 am-6:00 pm

2 stops18h 30m

Seattle/Tacoma Intl

Thu 3/26

3:35 pm-5:50 pm

2 stops19h 15m

$802

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 3/7

6:35 am-11:30 am

1 stop12h 55m

Seattle/Tacoma Intl

Mon 3/9

7:50 pm-6:35 pm

1 stop15h 45m

$897

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 3/7

6:35 am-11:30 am

1 stop12h 55m

Seattle/Tacoma Intl

Mon 3/9

7:21 am-2:15 pm

2 stops23h 54m

$898

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 3/7

6:35 am-11:04 pm

2 stops24h 29m

Seattle/Tacoma Intl

Mon 3/9

7:21 am-10:40 am

2 stops20h 19m

$903

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sun 3/22

6:30 am-10:25 am

3 stops34h 55m

Seattle/Tacoma Intl

Sun 3/29

3:40 pm-9:00 pm

2 stops21h 20m

$904

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sun 3/22

6:30 am-10:25 am

3 stops34h 55m

Seattle/Tacoma Intl

Sun 3/29

3:40 pm-9:55 pm

3 stops22h 15m

$953

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 6/30

8:25 pm-11:35 am

1 stop23h 10m

Seattle/Tacoma Intl

Tue 7/14

1:35 pm-10:45 am

1 stop13h 10m

$964

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 7/2

6:30 am-8:31 pm

2 stops22h 01m

Seattle/Tacoma Intl

Wed 7/15

1:18 pm-3:40 pm

2 stops18h 22m

$1,016

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 6/27

4:15 pm-6:25 pm

1 stop34h 10m

Seattle/Tacoma Intl

Wed 7/15

8:20 pm-7:50 pm

1 stop15h 30m

$1,030

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 7/2

6:30 am-8:31 pm

2 stops22h 01m

Seattle/Tacoma Intl

Thu 7/16

3:34 pm-6:45 pm

2 stops19h 11m

$1,032

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 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 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

12h 55m

Direct flights

None
The fastest flight from Northern Ireland to State of Washington takes 12h 55m
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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