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Cheap flights from Northern Ireland to Washington from £586

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Northern Ireland to Washington departing on 19/3. 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 return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
06:30 - 18:00
BFS
-
SEA
18h 30m
2 stops
Multiple Airlines Logo
15:35 - 17:50
SEA
-
BFS
19h 15m
2 stops
£586Multiple Airlines
Thu, 19 Mar - Thu, 26 Mar
British Airways Logo
06:35 - 11:30
BHD
-
SEA
12h 55m
1 stop
British Airways Logo
07:21 - 10:40
SEA
-
BHD
20h 19m
2 stops
£655British Airways
Sat, 7 Mar - Mon, 9 Mar
British Airways Logo
06:35 - 11:30
BHD
-
SEA
12h 55m
1 stop
British Airways Logo
07:21 - 14:15
SEA
-
BHD
23h 54m
2 stops
£656British Airways
Sat, 7 Mar - Mon, 9 Mar
British Airways Logo
06:35 - 23:04
BHD
-
SEA
24h 29m
2 stops
British Airways Logo
07:21 - 10:40
SEA
-
BHD
20h 19m
2 stops
£660British Airways
Sat, 7 Mar - Mon, 9 Mar
Multiple Airlines Logo
06:30 - 10:25
BFS
-
SEA
34h 55m
3 stops
Multiple Airlines Logo
15:40 - 21:00
SEA
-
BFS
21h 20m
2 stops
£660Multiple Airlines
Sun, 22 Mar - Sun, 29 Mar
Multiple Airlines Logo
06:30 - 10:25
BFS
-
SEA
34h 55m
3 stops
Multiple Airlines Logo
15:40 - 21:55
SEA
-
BFS
22h 15m
3 stops
£696Multiple Airlines
Sun, 22 Mar - Sun, 29 Mar
American Airlines Logo
06:30 - 20:31
BHD
-
SEA
22h 01m
2 stops
American Airlines Logo
20:20 - 19:25
SEA
-
BHD
15h 05m
1 stop
£742American Airlines
Thu, 2 Jul - Thu, 16 Jul
American Airlines Logo
16:15 - 18:25
BHD
-
SEA
34h 10m
1 stop
American Airlines Logo
13:18 - 15:40
SEA
-
BHD
18h 22m
2 stops
£752American Airlines
Sat, 27 Jun - Wed, 15 Jul
American Airlines Logo
06:30 - 20:31
BHD
-
SEA
22h 01m
2 stops
American Airlines Logo
15:34 - 18:45
SEA
-
BHD
19h 11m
2 stops
£754American Airlines
Thu, 2 Jul - Thu, 16 Jul
American Airlines Logo
06:30 - 22:30
BHD
-
SEA
24h 00m
2 stops
American Airlines Logo
13:18 - 15:30
SEA
-
BHD
18h 12m
2 stops
£757American Airlines
Sun, 28 Jun - Mon, 13 Jul

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
7 Mar
BHD06:35Belfast City
12h 55m
1 stop
SEA11:30Seattle/Tacoma Intl
9 Mar
SEA07:21Seattle/Tacoma Intl
20h 19m
2 stops
BHD10:40Belfast City
£655
British Airways
7 Mar
BHD06:35Belfast City
12h 55m
1 stop
SEA11:30Seattle/Tacoma Intl
9 Mar
SEA07:21Seattle/Tacoma Intl
23h 54m
2 stops
BHD14:15Belfast City
£656
British Airways
7 Mar
BHD06:35Belfast City
24h 29m
2 stops
SEA23:04Seattle/Tacoma Intl
9 Mar
SEA07:21Seattle/Tacoma Intl
20h 19m
2 stops
BHD10:40Belfast City
£660

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
2 Jul
BHD06:30Belfast City
22h 01m
2 stops
SEA20:31Seattle/Tacoma Intl
16 Jul
SEA20:20Seattle/Tacoma Intl
15h 05m
1 stop
BHD19:25Belfast City
£742
American Airlines
27 Jun
BHD16:15Belfast City
34h 10m
1 stop
SEA18:25Seattle/Tacoma Intl
15 Jul
SEA13:18Seattle/Tacoma Intl
18h 22m
2 stops
BHD15:40Belfast City
£752
American Airlines
2 Jul
BHD06:30Belfast City
22h 01m
2 stops
SEA20:31Seattle/Tacoma Intl
16 Jul
SEA15:34Seattle/Tacoma Intl
19h 11m
2 stops
BHD18:45Belfast City
£754

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 5 February 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 19/3

06:30-18:00

2 stops18h 30m

Seattle/Tacoma Intl

Thu 26/3

15:35-17:50

2 stops19h 15m

£586

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 7/3

06:35-11:30

1 stop12h 55m

Seattle/Tacoma Intl

Mon 9/3

07:21-10:40

2 stops20h 19m

£655

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 7/3

06:35-11:30

1 stop12h 55m

Seattle/Tacoma Intl

Mon 9/3

07:21-14:15

2 stops23h 54m

£656

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 7/3

06:35-23:04

2 stops24h 29m

Seattle/Tacoma Intl

Mon 9/3

07:21-10:40

2 stops20h 19m

£660

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sun 22/3

06:30-10:25

3 stops34h 55m

Seattle/Tacoma Intl

Sun 29/3

15:40-21:00

2 stops21h 20m

£660

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sun 22/3

06:30-10:25

3 stops34h 55m

Seattle/Tacoma Intl

Sun 29/3

15:40-21:55

3 stops22h 15m

£696

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 2/7

06:30-20:31

2 stops22h 01m

Seattle/Tacoma Intl

Thu 16/7

20:20-19:25

1 stop15h 05m

£742

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 27/6

16:15-18:25

1 stop34h 10m

Seattle/Tacoma Intl

Wed 15/7

13:18-15:40

2 stops18h 22m

£752

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 2/7

06:30-20:31

2 stops22h 01m

Seattle/Tacoma Intl

Thu 16/7

15:34-18:45

2 stops19h 11m

£754

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sun 28/6

06:30-22:30

2 stops24h 00m

Seattle/Tacoma Intl

Mon 13/7

13:18-15:30

2 stops18h 12m

£757

Flights are sorted by cheapest return flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

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

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

American Airlines and British Airways 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

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 many operators does momondo search for flights from Northern Ireland to Washington?

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Northern Ireland to Washington.

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

    The travel and health documents required for your trip to Washington can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Northern Ireland to State of Washington

Compare and see reviews for airlines that fly from Northern Ireland to State of Washington with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom £549Free CancellationRating
7.2
11,237 reviews
Search American Airlines flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Northern Ireland to Washington. momondo saves you time and could save you money on your trip.

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

Yes. All flights to Washington from Northern Ireland on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search for Northern Ireland to Washington flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to Washington from Northern Ireland. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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