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Cheap flights from Northern Ireland to Washington from £541

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 17/3. 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

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Multiple Airlines Logo
08:45 - 18:00BHD-SEA
40h 15m2 stops
Multiple Airlines Logo
15:35 - 14:50SEA-BHD
16h 15m2 stops
£541Multiple Airlines
Find Deal
Tue, 17 Mar - Tue, 24 Mar
Multiple Airlines Logo
06:30 - 18:00BFS-SEA
18h 30m2 stops
Multiple Airlines Logo
15:35 - 17:55SEA-BFS
19h 20m2 stops
£601Multiple Airlines
Find Deal
Tue, 17 Mar - Tue, 24 Mar
British Airways Logo
11:25 - 17:55BHD-SEA
13h 30m1 stop
British Airways Logo
14:25 - 11:30SEA-BHD
14h 05m1 stop
£603British Airways
Find Deal
Tue, 17 Mar - Tue, 24 Mar
British Airways Logo
10:00 - 23:08BHD-SEA
20h 08m2 stops
British Airways Logo
19:50 - 18:40SEA-BHD
15h 50m1 stop
£608British Airways
Find Deal
Tue, 17 Mar - Tue, 24 Mar
American Airlines Logo
09:05 - 16:55BHD-SEA
15h 50m1 stop
American Airlines Logo
19:50 - 18:35SEA-BHD
15h 45m1 stop
£649American Airlines
Find Deal
Thu, 5 Mar - Mon, 9 Mar
American Airlines Logo
11:05 - 11:30BHD-SEA
32h 25m1 stop
American Airlines Logo
19:50 - 18:35SEA-BHD
15h 45m1 stop
£651American Airlines
Find Deal
Thu, 5 Mar - Mon, 9 Mar
American Airlines Logo
10:40 - 23:07BHD-SEA
20h 27m2 stops
American Airlines Logo
13:48 - 14:15SEA-BHD
17h 27m2 stops
£652American Airlines
Find Deal
Thu, 5 Mar - Mon, 9 Mar
American Airlines Logo
09:05 - 16:55BHD-SEA
15h 50m1 stop
American Airlines Logo
07:00 - 10:40SEA-BHD
20h 40m2 stops
£654American Airlines
Find Deal
Thu, 5 Mar - Mon, 9 Mar
American Airlines Logo
09:05 - 23:07BHD-SEA
22h 02m2 stops
American Airlines Logo
07:00 - 14:15SEA-BHD
24h 15m2 stops
£655American Airlines
Find Deal
Thu, 5 Mar - Mon, 9 Mar
Multiple Airlines Logo
05:45 - 17:05BFS-SEA
43h 20m3 stops
Multiple Airlines Logo
05:50 - 19:55SEA-BFS
30h 05m3 stops
£891Multiple Airlines
Find Deal
Sat, 29 Nov - Sat, 6 Dec

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
17 Mar
BHD11:25Belfast City
13h 30m
1 stop
SEA17:55Seattle/Tacoma Intl
24 Mar
SEA14:25Seattle/Tacoma Intl
14h 05m
1 stop
BHD11:30Belfast City
£603
Find similar
British Airways
17 Mar
BHD10:00Belfast City
20h 08m
2 stops
SEA23:08Seattle/Tacoma Intl
24 Mar
SEA19:50Seattle/Tacoma Intl
15h 50m
1 stop
BHD18:40Belfast City
£608
Find similar

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
5 Mar
BHD09:05Belfast City
15h 50m
1 stop
SEA16:55Seattle/Tacoma Intl
9 Mar
SEA19:50Seattle/Tacoma Intl
15h 45m
1 stop
BHD18:35Belfast City
£648
Find similar
American Airlines
5 Mar
BHD11:05Belfast City
32h 25m
1 stop
SEA11:30Seattle/Tacoma Intl
9 Mar
SEA19:50Seattle/Tacoma Intl
15h 45m
1 stop
BHD18:35Belfast City
£651
Find similar
American Airlines
5 Mar
BHD10:40Belfast City
20h 27m
2 stops
SEA23:07Seattle/Tacoma Intl
9 Mar
SEA13:48Seattle/Tacoma Intl
17h 27m
2 stops
BHD14:15Belfast City
£652
Find similar

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 17 October 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

Tue 17/3

08:45-18:00

2 stops40h 15m

Seattle/Tacoma Intl

Tue 24/3

15:35-14:50

2 stops16h 15m

£541

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Tue 17/3

06:30-18:00

2 stops18h 30m

Seattle/Tacoma Intl

Tue 24/3

15:35-17:55

2 stops19h 20m

£601

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 17/3

11:25-17:55

1 stop13h 30m

Seattle/Tacoma Intl

Tue 24/3

14:25-11:30

1 stop14h 05m

£603

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 17/3

10:00-23:08

2 stops20h 08m

Seattle/Tacoma Intl

Tue 24/3

19:50-18:40

1 stop15h 50m

£608

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

09:05-16:55

1 stop15h 50m

Seattle/Tacoma Intl

Mon 9/3

19:50-18:35

1 stop15h 45m

£648

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

11:05-11:30

1 stop32h 25m

Seattle/Tacoma Intl

Mon 9/3

19:50-18:35

1 stop15h 45m

£651

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

10:40-23:07

2 stops20h 27m

Seattle/Tacoma Intl

Mon 9/3

13:48-14:15

2 stops17h 27m

£652

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

09:05-16:55

1 stop15h 50m

Seattle/Tacoma Intl

Mon 9/3

07:00-10:40

2 stops20h 40m

£654

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

09:05-23:07

2 stops22h 02m

Seattle/Tacoma Intl

Mon 9/3

07:00-14:15

2 stops24h 15m

£655

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sat 29/11

05:45-17:05

3 stops43h 20m

Seattle/Tacoma Intl

Sat 6/12

05:50-19:55

3 stops30h 05m

£891

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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

Direct flights

None
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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  • 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
British AirwaysPriceFrom £438Free CancellationRating
6.7
7,457 reviews
Search British Airways flights
American AirlinesPriceFrom £559Free CancellationRating
7.2
11,043 reviews
Search American Airlines flights

  • How do I get Price Alerts for flights from Northern Ireland to State of Washington?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to Northern Ireland from State of Washington. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from Northern Ireland to State of Washington with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

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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