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.

£159 Cheap Flights from Washington to Belfast in 2025/26

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Find the cheapest flights from Washington to Belfast

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

19:50 - 18:35

SEA

BHD

15h 45m1 stop

06:45 - 12:30

BHD

SEA

12h 45m1 stop

£480British Airways

Mon, 23 Mar - Fri, 27 Mar

15:05 - 21:00

SEA

BHD

21h 55m1 stop

06:30 - 12:35

BHD

SEA

13h 05m1 stop

£481Delta

Sat, 7 Mar - Tue, 17 Mar

15:05 - 21:00

SEA

BHD

21h 55m1 stop

06:30 - 19:05

BHD

SEA

19h 35m2 stops

£488Delta

Sat, 7 Mar - Tue, 17 Mar

17:30 - 16:55

SEA

BHD

15h 25m1 stop

17:30 - 16:30

BHD

SEA

31h 00m1 stop

£491KLM

Wed, 1 Apr - Wed, 8 Apr

19:50 - 16:05

SEA

BHD

13h 15m1 stop

06:45 - 12:30

BHD

SEA

12h 45m1 stop

£498British Airways

Mon, 23 Mar - Fri, 27 Mar

17:30 - 16:55

SEA

BHD

15h 25m1 stop

09:50 - 00:03

BHD

SEA

22h 13m2 stops

£499KLM

Wed, 1 Apr - Wed, 8 Apr

06:44 - 10:40

SEA

BHD

20h 56m2 stops

06:45 - 12:30

BHD

SEA

12h 45m1 stop

£503Multiple Airlines

Mon, 23 Mar - Fri, 27 Mar

13:37 - 16:05

SEA

BHD

19h 28m2 stops

06:45 - 12:30

BHD

SEA

12h 45m1 stop

£514British Airways

Mon, 23 Mar - Fri, 27 Mar

07:15 - 11:55

SEA

BHD

20h 40m2 stops

06:50 - 21:46

BHD

SEA

22h 56m2 stops

£529British Airways

Wed, 1 Apr - Wed, 8 Apr

09:50 - 17:55

PDX

BFS

24h 05m3 stops

10:10 - 09:15

BFS

PDX

31h 05m3 stops

£778Multiple Airlines

Wed, 4 Feb - Wed, 11 Feb

Delta flights from State of Washington to Belfast

Our best Delta deals on State of Washington to Belfast flight tickets

Delta

7 Mar

SEA15:05Seattle/Tacoma Intl

21h 55m

1 stop

BHD21:00Belfast City

17 Mar

BHD06:30Belfast City

13h 05m

1 stop

SEA12:35Seattle/Tacoma Intl

£481

Find similar

Delta

7 Mar

SEA15:05Seattle/Tacoma Intl

21h 55m

1 stop

BHD21:00Belfast City

17 Mar

BHD06:30Belfast City

19h 35m

2 stops

SEA19:05Seattle/Tacoma Intl

£488

Find similar

Delta

7 Mar

SEA07:30Seattle/Tacoma Intl

25h 20m

2 stops

BHD16:50Belfast City

17 Mar

BHD06:30Belfast City

20h 18m

2 stops

SEA19:48Seattle/Tacoma Intl

£567

Find similar

KLM flights from State of Washington to Belfast

Our best KLM deals on State of Washington to Belfast flight tickets

KLM

1 Apr

SEA17:30Seattle/Tacoma Intl

15h 25m

1 stop

BHD16:55Belfast City

8 Apr

BHD17:30Belfast City

31h 00m

1 stop

SEA16:30Seattle/Tacoma Intl

£491

Find similar

KLM

1 Apr

SEA17:30Seattle/Tacoma Intl

15h 25m

1 stop

BHD16:55Belfast City

8 Apr

BHD09:50Belfast City

22h 13m

2 stops

SEA00:03Seattle/Tacoma Intl

£499

Find similar

KLM

20 Mar

PDX14:25Portland

19h 25m

1 stop

BHD16:50Belfast City

28 Mar

BHD17:20Belfast City

24h 50m

1 stop

PDX11:10Portland

£1,118

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 23/3

19:50-18:35

1 stop15h 45m

Belfast City

Fri 27/3

06:45-12:30

1 stop12h 45m

£480

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

15:05-21:00

1 stop21h 55m

Belfast City

Tue 17/3

06:30-12:35

1 stop13h 05m

£481

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

15:05-21:00

1 stop21h 55m

Belfast City

Tue 17/3

06:30-19:05

2 stops19h 35m

£488

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 1/4

17:30-16:55

1 stop15h 25m

Belfast City

Wed 8/4

17:30-16:30

1 stop31h 00m

£491

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 23/3

19:50-16:05

1 stop13h 15m

Belfast City

Fri 27/3

06:45-12:30

1 stop12h 45m

£498

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 1/4

17:30-16:55

1 stop15h 25m

Belfast City

Wed 8/4

09:50-00:03

2 stops22h 13m

£499

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 23/3

06:44-10:40

2 stops20h 56m

Belfast City

Fri 27/3

06:45-12:30

1 stop12h 45m

£503

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 23/3

13:37-16:05

2 stops19h 28m

Belfast City

Fri 27/3

06:45-12:30

1 stop12h 45m

£514

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 1/4

07:15-11:55

2 stops20h 40m

Belfast City

Wed 8/4

06:50-21:46

2 stops22h 56m

£529

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Wed 4/2

09:50-17:55

3 stops24h 05m

Belfast Intl

Wed 11/2

10:10-09:15

3 stops31h 05m

£778

Flights are sorted by cheapest return flights first.

Showing 1-10 of 19 resultsSorted by cheapest first

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 airline that flies from Washington to Belfast?

British Airways is the most popular carrier operating from Washington to Belfast

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	12h 30m
Direct flights	None

The fastest flight from State of Washington to Belfast takes 12h 30m

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

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.