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Cheap flights from Washington to Belfast from £236

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Belfast departing on 17/8. 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 Washington to Belfast

Cheap return flights

Enter your travel dates to find the best prices.
British Airways Logo
13:30 - 12:55
SEA
-
BHD
15h 25m
1 stop
British Airways Logo
20:25 - 11:35
BHD
-
SEA
23h 10m
1 stop
£654British Airways
Mon, 17 Aug - Tue, 25 Aug
British Airways Logo
20:20 - 19:25
SEA
-
BHD
15h 05m
1 stop
British Airways Logo
06:30 - 18:25
BHD
-
SEA
19h 55m
1 stop
£655British Airways
Mon, 5 Oct - Thu, 22 Oct
British Airways Logo
13:30 - 12:55
SEA
-
BHD
15h 25m
1 stop
British Airways Logo
20:25 - 11:35
BHD
-
SEA
23h 10m
1 stop
£656British Airways
Mon, 17 Aug - Tue, 25 Aug
British Airways Logo
13:30 - 12:55
SEA
-
BHD
15h 25m
1 stop
British Airways Logo
16:05 - 18:25
BHD
-
SEA
34h 20m
1 stop
£668British Airways
Mon, 19 Oct - Wed, 21 Oct
British Airways Logo
19:30 - 17:40
PDX
-
BHD
14h 10m
1 stop
British Airways Logo
20:35 - 17:40
BHD
-
PDX
29h 05m
1 stop
£668British Airways
Sun, 23 Aug - Wed, 26 Aug
British Airways Logo
20:20 - 19:40
SEA
-
BHD
15h 20m
1 stop
British Airways Logo
20:35 - 11:35
BHD
-
SEA
23h 00m
1 stop
£669British Airways
Tue, 8 Sep - Thu, 24 Sep
Multiple Airlines Logo
19:00 - 22:25
SEA
-
BFS
19h 25m
2 stops
Multiple Airlines Logo
08:20 - 11:45
BFS
-
SEA
35h 25m
2 stops
£737Multiple Airlines
Mon, 17 Aug - Tue, 25 Aug
Delta Logo
13:05 - 09:20
PDX
-
BHD
12h 15m
1 stop
Delta Logo
17:30 - 11:10
BHD
-
PDX
25h 40m
1 stop
£800Delta
Tue, 14 Jul - Wed, 22 Jul
Delta Logo
15:00 - 16:55
PDX
-
BHD
17h 55m
2 stops
Delta Logo
17:30 - 11:10
BHD
-
PDX
25h 40m
1 stop
£803Delta
Tue, 14 Jul - Wed, 22 Jul
Delta Logo
13:05 - 16:55
PDX
-
BHD
19h 50m
1 stop
Delta Logo
09:50 - 11:36
BHD
-
PDX
33h 46m
2 stops
£812Delta
Mon, 13 Jul - Thu, 23 Jul

British Airways flights from State of Washington to Belfast

Our best British Airways deals on State of Washington to Belfast flight tickets
British Airways
5 Oct
SEA20:20Seattle/Tacoma Intl
14h 25m
1 stop
BHD18:45Belfast City
22 Oct
BHD12:45Belfast City
13h 40m
1 stop
SEA18:25Seattle/Tacoma Intl
£655
British Airways
5 Oct
SEA20:20Seattle/Tacoma Intl
15h 05m
1 stop
BHD19:25Belfast City
22 Oct
BHD09:35Belfast City
16h 50m
1 stop
SEA18:25Seattle/Tacoma Intl
£656
British Airways
19 Oct
SEA13:30Seattle/Tacoma Intl
15h 25m
1 stop
BHD12:55Belfast City
21 Oct
BHD16:05Belfast City
34h 20m
1 stop
SEA18:25Seattle/Tacoma Intl
£668

Delta flights from State of Washington to Belfast

Our best Delta deals on State of Washington to Belfast flight tickets
Delta
8 Sept
SEA07:20Seattle/Tacoma Intl
25h 35m
2 stops
BHD16:55Belfast City
22 Sept
BHD17:30Belfast City
26h 17m
1 stop
SEA11:47Seattle/Tacoma Intl
£686
Delta
8 Sept
SEA12:00Seattle/Tacoma Intl
20h 55m
2 stops
BHD16:55Belfast City
21 Sept
BHD17:30Belfast City
37h 56m
2 stops
SEA23:26Seattle/Tacoma Intl
£693
Delta
7 Sept
SEA21:25Seattle/Tacoma Intl
35h 30m
2 stops
BHD16:55Belfast City
22 Sept
BHD17:30Belfast City
26h 17m
1 stop
SEA11:47Seattle/Tacoma Intl
£694

momondo Fare Finder

 
Customise your flight search to find flights from State of Washington to Belfast 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 9 May 2026.
Use the filters below to find and compare flights from Washington to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 17/8

13:30-12:55

1 stop15h 25m

Belfast City

Tue 25/8

20:25-11:35

1 stop23h 10m

£654
Fastest return journey

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 5/10

20:20-19:25

1 stop15h 05m

Belfast City

Thu 22/10

06:30-18:25

1 stop19h 55m

£655

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 17/8

13:30-12:55

1 stop15h 25m

Belfast City

Tue 25/8

20:25-11:35

1 stop23h 10m

£656

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 19/10

13:30-12:55

1 stop15h 25m

Belfast City

Wed 21/10

16:05-18:25

1 stop34h 20m

£668

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sun 23/8

19:30-17:40

1 stop14h 10m

Belfast City

Wed 26/8

20:35-17:40

1 stop29h 05m

£668

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 8/9

20:20-19:40

1 stop15h 20m

Belfast City

Thu 24/9

20:35-11:35

1 stop23h 00m

£669

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Mon 17/8

19:00-22:25

2 stops19h 25m

Belfast Intl

Tue 25/8

08:20-11:45

2 stops35h 25m

£737

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Tue 14/7

13:05-09:20

1 stop12h 15m

Belfast City

Wed 22/7

17:30-11:10

1 stop25h 40m

£800

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Tue 14/7

15:00-16:55

2 stops17h 55m

Belfast City

Wed 22/7

17:30-11:10

1 stop25h 40m

£803

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 13/7

13:05-16:55

1 stop19h 50m

Belfast City

Thu 23/7

09:50-11:36

2 stops33h 46m

£812

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Belfast from

How to get the cheapest flight ticket from State of Washington to Belfast

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 month to fly to Belfast?

The cheapest month to fly to Belfast from State of Washington is in July. Flight prices, which tend to average around £0, are often lower during this time because this is during the off-season. If you aren’t able to travel to Belfast during the month of July, then flying in January is also cheap. Prices for this month can be found on momondo for an average of £0.

Cheap State of Washington to Belfast flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Belfast

Fastest flight time

14h 05m

Direct flights

None
The fastest flight from State of Washington to Belfast takes 14h 05m
There are no direct flights from State of Washington to Belfast. There are no popular flight routes from State of Washington to Belfast.
Search flight deals

Frequently asked questions about flying from Washington to Belfast

  • When did momondo last update prices for flights from Washington to Belfast?

    Prices for flights from Washington to Belfast refresh daily.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to Belfast.

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

    The travel and health documents required for your trip to Belfast 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 Belfast. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

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

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

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

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

How can momondo help me find flights from Washington to Belfast?

momondo provides multiple filters to help you find the best flight to Belfast from Washington. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes momondo offers price alerts on flights to Belfast from Washington. 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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Find better results for your trip to the United Kingdom

Fly into one of these airports located in Belfast

Airports listed have a maximum distance of 12.2 mi from Belfast
Belfast Intl Airport
Belfast City Airport