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Cheap flights from Northern Ireland to Washington from £553

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 15/9. 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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Find the cheapest flights from Northern Ireland to Washington

Cheap return flights

British Airways Logo
06:40 - 11:35BHD-SEA
12h 55m1 stop
British Airways Logo
13:30 - 13:30SEA-BHD
16h 00m1 stop
£553British Airways
Find Deal
Mon, 15 Sep - Wed, 24 Sep
British Airways Logo
06:40 - 11:35BHD-SEA
12h 55m1 stop
British Airways Logo
13:30 - 13:30SEA-BHD
16h 00m1 stop
£556British Airways
Find Deal
Mon, 15 Sep - Wed, 24 Sep
British Airways Logo
06:40 - 11:35BHD-SEA
12h 55m1 stop
British Airways Logo
13:30 - 11:55SEA-BHD
14h 25m1 stop
£565British Airways
Find Deal
Mon, 15 Sep - Wed, 24 Sep
British Airways Logo
18:30 - 11:10BHD-SEA
24h 40m1 stop
British Airways Logo
10:11 - 11:55SEA-BHD
17h 44m2 stops
£649British Airways
Find Deal
Mon, 15 Sep - Wed, 24 Sep
Aer Lingus Logo
17:55 - 17:50BHD-SEA
31h 55m2 stops
Aer Lingus Logo
19:35 - 10:30SEA-BHD
30h 55m2 stops
£651Aer Lingus
Find Deal
Mon, 15 Sep - Wed, 24 Sep
Aer Lingus Logo
17:55 - 17:50BHD-SEA
31h 55m2 stops
Aer Lingus Logo
19:35 - 19:55SEA-BHD
16h 20m2 stops
£659Aer Lingus
Find Deal
Mon, 15 Sep - Wed, 24 Sep
British Airways Logo
19:30 - 19:06BHD-SEA
31h 36m2 stops
British Airways Logo
13:30 - 11:55SEA-BHD
14h 25m1 stop
£661British Airways
Find Deal
Mon, 15 Sep - Wed, 24 Sep
Logo
06:40 - 11:35BHD-SEA
12h 55m1 stop
Logo
07:48 - 11:55SEA-BHD
20h 07m2 stops
£726
Find Deal
Mon, 15 Sep - Wed, 24 Sep
British Airways Logo
06:35 - 11:10BHD-SEA
12h 35m1 stop
British Airways Logo
13:30 - 13:30SEA-BHD
16h 00m1 stop
£2,854British Airways
Find Deal
Tue, 14 Oct - Wed, 22 Oct
Logo
20:20 - 21:45BHD-SEA
33h 25m2 stops
Logo
07:30 - 12:40SEA-BHD
21h 10m2 stops
£2,855
Find Deal
Tue, 14 Oct - Wed, 22 Oct

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
15 Sept
BHD06:40Belfast City
12h 55m
1 stop
SEA11:35Seattle/Tacoma Intl
24 Sept
SEA13:30Seattle/Tacoma Intl
16h 00m
1 stop
BHD13:30Belfast City
£553
Find similar
British Airways
15 Sept
BHD06:40Belfast City
12h 55m
1 stop
SEA11:35Seattle/Tacoma Intl
24 Sept
SEA13:30Seattle/Tacoma Intl
16h 00m
1 stop
BHD13:30Belfast City
£556
Find similar
British Airways
15 Sept
BHD06:40Belfast City
12h 55m
1 stop
SEA11:35Seattle/Tacoma Intl
24 Sept
SEA13:30Seattle/Tacoma Intl
14h 25m
1 stop
BHD11:55Belfast City
£565
Find similar

Aer Lingus flights from Northern Ireland to State of Washington

Our best Aer Lingus deals on Northern Ireland to State of Washington flight tickets
Aer Lingus
15 Sept
BHD17:55Belfast City
31h 55m
2 stops
SEA17:50Seattle/Tacoma Intl
24 Sept
SEA19:35Seattle/Tacoma Intl
30h 55m
2 stops
BHD10:30Belfast City
£651
Find similar
Aer Lingus
15 Sept
BHD17:55Belfast City
31h 55m
2 stops
SEA17:50Seattle/Tacoma Intl
24 Sept
SEA19:35Seattle/Tacoma Intl
16h 20m
2 stops
BHD19:55Belfast City
£659
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 25 August 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

Mon 15/9

06:40-11:35

1 stop12h 55m

Seattle/Tacoma Intl

Wed 24/9

13:30-13:30

1 stop16h 00m

£553

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

06:40-11:35

1 stop12h 55m

Seattle/Tacoma Intl

Wed 24/9

13:30-13:30

1 stop16h 00m

£556

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

06:40-11:35

1 stop12h 55m

Seattle/Tacoma Intl

Wed 24/9

13:30-11:55

1 stop14h 25m

£565

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

18:30-11:10

1 stop24h 40m

Seattle/Tacoma Intl

Wed 24/9

10:11-11:55

2 stops17h 44m

£649

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

17:55-17:50

2 stops31h 55m

Seattle/Tacoma Intl

Wed 24/9

19:35-10:30

2 stops30h 55m

£651

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

17:55-17:50

2 stops31h 55m

Seattle/Tacoma Intl

Wed 24/9

19:35-19:55

2 stops16h 20m

£659

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

19:30-19:06

2 stops31h 36m

Seattle/Tacoma Intl

Wed 24/9

13:30-11:55

1 stop14h 25m

£661

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

06:40-11:35

1 stop12h 55m

Seattle/Tacoma Intl

Wed 24/9

07:48-11:55

2 stops20h 07m

£726

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 14/10

06:35-11:10

1 stop12h 35m

Seattle/Tacoma Intl

Wed 22/10

13:30-13:30

1 stop16h 00m

£2,854

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 14/10

20:20-21:45

2 stops33h 25m

Seattle/Tacoma Intl

Wed 22/10

07:30-12:40

2 stops21h 10m

£2,855

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.
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
British AirwaysPriceFrom £435Free CancellationRating
6.7
7,305 reviews
Search British Airways flights
American AirlinesPriceFrom £555Free CancellationRating
7.2
10,000 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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