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Cheap flights from Washington to Belfast from £265

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 12/3. 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
07:30 - 16:10PDX-BFS
25h 40m3 stops
Multiple Airlines Logo
07:20 - 18:00BFS-PDX
17h 40m2 stops
£1,198Multiple Airlines
Find Deal
Wed, 11 Mar - Wed, 18 Mar
Multiple Airlines Logo
06:00 - 14:10PDX-BFS
25h 10m2 stops
Multiple Airlines Logo
07:20 - 18:00BFS-PDX
17h 40m2 stops
£1,214Multiple Airlines
Find Deal
Wed, 11 Mar - Wed, 18 Mar
Multiple Airlines Logo
08:10 - 22:00SEA-BFS
29h 50m3 stops
Multiple Airlines Logo
07:50 - 18:20BFS-SEA
18h 30m2 stops
£1,255Multiple Airlines
Find Deal
Fri, 19 Dec - Fri, 26 Dec
Multiple Airlines Logo
08:10 - 22:00SEA-BFS
29h 50m3 stops
Multiple Airlines Logo
13:10 - 15:40BFS-SEA
34h 30m3 stops
£1,348Multiple Airlines
Find Deal
Fri, 19 Dec - Fri, 26 Dec
Multiple Airlines Logo
09:50 - 21:00PDX-BFS
27h 10m3 stops
Multiple Airlines Logo
19:30 - 18:30BFS-PDX
31h 00m3 stops
£1,374Multiple Airlines
Find Deal
Mon, 19 Jan - Thu, 29 Jan
Multiple Airlines Logo
20:05 - 22:00SEA-BFS
17h 55m2 stops
Multiple Airlines Logo
07:50 - 18:20BFS-SEA
18h 30m2 stops
£1,422Multiple Airlines
Find Deal
Fri, 19 Dec - Fri, 26 Dec
Multiple Airlines Logo
10:05 - 21:40SEA-BFS
27h 35m3 stops
Multiple Airlines Logo
22:25 - 18:20BFS-SEA
27h 55m2 stops
£1,890Multiple Airlines
Find Deal
Sat, 20 Dec - Sat, 27 Dec
Multiple Airlines Logo
15:20 - 19:55SEA-BFS
20h 35m2 stops
Multiple Airlines Logo
22:25 - 18:20BFS-SEA
27h 55m2 stops
£1,928Multiple Airlines
Find Deal
Sat, 20 Dec - Sat, 27 Dec
Multiple Airlines Logo
10:05 - 22:40SEA-BFS
28h 35m3 stops
Multiple Airlines Logo
15:45 - 18:20BFS-SEA
34h 35m3 stops
£2,065Multiple Airlines
Find Deal
Sat, 20 Dec - Sat, 27 Dec

momondo Fare Finder

 
Customise your flight search to find flights from State of Washington to Belfast Intl Airport 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 6 November 2025.
Use the filters below to find and compare flights from Washington to Belfast Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Wed 11/3

07:30-16:10

3 stops25h 40m

Belfast Intl

Wed 18/3

07:20-18:00

2 stops17h 40m

£1,198

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Wed 11/3

06:00-14:10

2 stops25h 10m

Belfast Intl

Wed 18/3

07:20-18:00

2 stops17h 40m

£1,214

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Fri 19/12

08:10-22:00

3 stops29h 50m

Belfast Intl

Fri 26/12

07:50-18:20

2 stops18h 30m

£1,255

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Fri 19/12

08:10-22:00

3 stops29h 50m

Belfast Intl

Fri 26/12

13:10-15:40

3 stops34h 30m

£1,348

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Mon 19/1

09:50-21:00

3 stops27h 10m

Belfast Intl

Thu 29/1

19:30-18:30

3 stops31h 00m

£1,374

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Fri 19/12

20:05-22:00

2 stops17h 55m

Belfast Intl

Fri 26/12

07:50-18:20

2 stops18h 30m

£1,422

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Sat 20/12

10:05-21:40

3 stops27h 35m

Belfast Intl

Sat 27/12

22:25-18:20

2 stops27h 55m

£1,890

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Sat 20/12

15:20-19:55

2 stops20h 35m

Belfast Intl

Sat 27/12

22:25-18:20

2 stops27h 55m

£1,928

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Sat 20/12

10:05-22:40

3 stops28h 35m

Belfast Intl

Sat 27/12

15:45-18:20

3 stops34h 35m

£2,065

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Thu 12/3

15:35-23:45

2 stops25h 10m

£265

Flights are sorted by cheapest return flights first.

Showing 1-10 of 11 resultsSorted by cheapest first
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Cheap State of Washington to Belfast Intl Airport flight deals and tips

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

Direct flights

None
There are no direct flights from State of Washington to Belfast Intl Airport. There are no popular flight routes from State of Washington to Belfast Intl Airport.
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  • When did momondo last update prices for flights from Washington to Belfast Intl Airport?

    Prices for flights from Washington to Belfast Intl Airport refresh daily.

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

    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 Intl Airport.

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

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

  • How do I get Price Alerts for flights from State of Washington to Belfast Intl Airport?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to State of Washington from Belfast Intl Airport. 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 State of Washington to Belfast Intl Airport with momondo?

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Travelling to a place near Belfast?

Book flights to Belfast if you plan to visit one of these locations
Ballymena
Newry
Armagh
Cookstown
Dungannon
Portadown

Why use momondo?

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

It is quick and easy to find Washington to Belfast flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Belfast that suits you.

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

All flight searches from Washington to Belfast on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Washington and Belfast by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to Belfast, momondo offers a useful price alert feature which will track prices for flights to Belfast from Washington and alert you when they change.

An easier way to manage your Belfast Intl Airport trip

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