Cheap flights from Northern Ireland to Washington from £556

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 22/10. 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
1 adult, Economy, 0 bags

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Find the cheapest flights from Northern Ireland to Washington

Cheap return flights

Enter your travel dates to find the best prices.
British Airways Logo
06:30 - 11:35
BHD
-
SEA
13h 05m
1 stop
British Airways Logo
19:50 - 18:35
SEA
-
BHD
15h 45m
1 stop
£556British Airways
Thu, 22 Oct - Mon, 26 Oct
British Airways Logo
20:35 - 11:35
BHD
-
SEA
23h 00m
1 stop
British Airways Logo
15:10 - 16:05
SEA
-
BHD
17h 55m
2 stops
£576British Airways
Thu, 22 Oct - Mon, 26 Oct
British Airways Logo
12:45 - 00:14
BHD
-
SEA
19h 29m
2 stops
British Airways Logo
15:10 - 14:15
SEA
-
BHD
16h 05m
2 stops
£581British Airways
Thu, 22 Oct - Mon, 26 Oct
British Airways Logo
06:30 - 11:35
BHD
-
SEA
13h 05m
1 stop
British Airways Logo
17:40 - 09:00
SEA
-
BHD
31h 20m
2 stops
£597British Airways
Thu, 17 Sep - Mon, 21 Sep
British Airways Logo
20:35 - 21:36
BHD
-
SEA
33h 01m
2 stops
British Airways Logo
17:40 - 09:00
SEA
-
BHD
31h 20m
2 stops
£601British Airways
Thu, 17 Sep - Mon, 21 Sep
British Airways Logo
14:20 - 11:35
BHD
-
SEA
29h 15m
1 stop
British Airways Logo
20:20 - 20:35
SEA
-
BHD
16h 15m
1 stop
£604British Airways
Thu, 24 Sep - Sun, 27 Sep
British Airways Logo
06:30 - 17:10
BHD
-
SEA
18h 40m
2 stops
British Airways Logo
06:15 - 10:30
SEA
-
BHD
20h 15m
2 stops
£609British Airways
Thu, 24 Sep - Sun, 27 Sep
British Airways Logo
07:00 - 16:55
BHD
-
SEA
17h 55m
2 stops
British Airways Logo
11:22 - 14:15
SEA
-
BHD
18h 53m
2 stops
£629British Airways
Thu, 3 Dec - Mon, 7 Dec
Multiple Airlines Logo
08:20 - 21:00
BFS
-
SEA
44h 40m
3 stops
Multiple Airlines Logo
15:40 - 22:20
SEA
-
BFS
22h 40m
3 stops
£652Multiple Airlines
Thu, 16 Jul - Wed, 22 Jul
Multiple Airlines Logo
06:10 - 20:40
BFS
-
SEA
22h 30m
2 stops
Multiple Airlines Logo
19:00 - 23:05
SEA
-
BFS
20h 05m
2 stops
£713Multiple Airlines
Thu, 10 Sep - Thu, 1 Oct

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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
22 Oct
BHD06:30Belfast City
13h 05m
1 stop
SEA11:35Seattle/Tacoma Intl
26 Oct
SEA19:50Seattle/Tacoma Intl
15h 45m
1 stop
BHD18:35Belfast City
£556
British Airways
22 Oct
BHD20:35Belfast City
23h 00m
1 stop
SEA11:35Seattle/Tacoma Intl
26 Oct
SEA15:10Seattle/Tacoma Intl
17h 55m
2 stops
BHD16:05Belfast City
£576
British Airways
22 Oct
BHD12:45Belfast City
19h 29m
2 stops
SEA00:14Seattle/Tacoma Intl
26 Oct
SEA15:10Seattle/Tacoma Intl
16h 05m
2 stops
BHD14:15Belfast City
£581

KLM flights from Northern Ireland to State of Washington

Our best KLM deals on Northern Ireland to State of Washington flight tickets
KLM
10 Sept
BHD09:50Belfast City
21h 30m
2 stops
SEA23:20Seattle/Tacoma Intl
1 Oct
SEA20:59Seattle/Tacoma Intl
35h 56m
2 stops
BHD16:55Belfast City
£700
KLM
19 Jul
BHD09:50Belfast City
33h 43m
1 stop
SEA11:33Seattle/Tacoma Intl
27 Jul
SEA17:40Seattle/Tacoma Intl
31h 40m
1 stop
BHD09:20Belfast City
£781

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 28 June 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

Cheapest return flight
Fastest return journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 22/10

06:30-11:35

1 stop13h 05m

Seattle/Tacoma Intl

Mon 26/10

19:50-18:35

1 stop15h 45m

£556

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 22/10

20:35-11:35

1 stop23h 00m

Seattle/Tacoma Intl

Mon 26/10

15:10-16:05

2 stops17h 55m

£576

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 22/10

12:45-00:14

2 stops19h 29m

Seattle/Tacoma Intl

Mon 26/10

15:10-14:15

2 stops16h 05m

£581

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 17/9

06:30-11:35

1 stop13h 05m

Seattle/Tacoma Intl

Mon 21/9

17:40-09:00

2 stops31h 20m

£597

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 17/9

20:35-21:36

2 stops33h 01m

Seattle/Tacoma Intl

Mon 21/9

17:40-09:00

2 stops31h 20m

£601

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 24/9

14:20-11:35

1 stop29h 15m

Seattle/Tacoma Intl

Sun 27/9

20:20-20:35

1 stop16h 15m

£604

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 24/9

06:30-17:10

2 stops18h 40m

Seattle/Tacoma Intl

Sun 27/9

06:15-10:30

2 stops20h 15m

£609

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 3/12

07:00-16:55

2 stops17h 55m

Seattle/Tacoma Intl

Mon 7/12

11:22-14:15

2 stops18h 53m

£629

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 16/7

08:20-21:00

3 stops44h 40m

Seattle/Tacoma Intl

Wed 22/7

15:40-22:20

3 stops22h 40m

£652

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 10/9

06:10-20:40

2 stops22h 30m

Seattle/Tacoma Intl

Thu 1/10

19:00-23:05

2 stops20h 05m

£713

Flights are sorted by cheapest return flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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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?

Aer Lingus is the most popular carrier 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

13h 05m

Direct flights

None
The fastest flight from Northern Ireland to State of Washington takes 13h 05m
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.

Frequently asked questions about flying from Northern Ireland to Washington

  • 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 £569Free CancellationRating
7.1
11,774 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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1 adult
Tue 28/7
Tue 4/8

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