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

Prices for flights from Belfast to Washington were last updated today.

How many operators does momondo search for flights from Belfast to Washington?

There are 2 operators available for flights from Belfast to Washington as of January 2026.

How old do you have to be to fly from Belfast 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 Belfast to Washington.

What documentation or ID do you need to fly to Washington?

The necessary travel and health documents for your Washington trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£528 Cheap Flights from Belfast to Washington in 2026

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Find the cheapest flights from Belfast to Washington

Round-trip

One-way

Cheap return flights

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11:25 - 16:55

BHD

SEA

13h 30m1 stop

14:10 - 10:40

SEA

BHD

36h 30m2 stops

£528British Airways

mer., 4 févr. - dim., 8 févr.

12:25 - 16:55

BHD

SEA

12h 30m1 stop

14:10 - 10:40

SEA

BHD

36h 30m2 stops

£530British Airways

mer., 4 févr. - dim., 8 févr.

06:35 - 22:07

BHD

SEA

23h 32m2 stops

14:10 - 10:40

SEA

BHD

36h 30m2 stops

£531British Airways

mer., 4 févr. - dim., 8 févr.

06:35 - 22:07

BHD

SEA

23h 32m2 stops

14:10 - 10:40

SEA

BHD

36h 30m2 stops

£533British Airways

mer., 4 févr. - dim., 8 févr.

09:15 - 16:55

BHD

SEA

15h 40m1 stop

07:15 - 10:40

SEA

BHD

20h 25m2 stops

£535British Airways

sam., 7 mars - lun., 9 mars

06:35 - 11:30

BHD

SEA

12h 55m1 stop

19:50 - 18:35

SEA

BHD

15h 45m1 stop

£536British Airways

sam., 7 mars - lun., 9 mars

06:35 - 16:55

BHD

SEA

18h 20m1 stop

13:37 - 14:15

SEA

BHD

17h 38m2 stops

£537British Airways

sam., 7 mars - lun., 9 mars

09:15 - 23:04

BHD

SEA

21h 49m2 stops

13:37 - 18:35

SEA

BHD

21h 58m2 stops

£539British Airways

sam., 7 mars - lun., 9 mars

06:30 - 09:15

BFS

SEA

34h 45m3 stops

14:35 - 21:05

SEA

BFS

22h 30m3 stops

£669Multiple Airlines

mer., 28 janv. - jeu., 29 janv.

06:30 - 22:16

BFS

SEA

23h 46m2 stops

14:35 - 21:05

SEA

BFS

22h 30m3 stops

£734Multiple Airlines

mer., 28 janv. - jeu., 29 janv.

British Airways flights from Belfast to State of Washington

Our best British Airways deals on Belfast to State of Washington flight tickets

British Airways

4 Feb

BHD11:25Belfast City

13h 30m

1 stop

SEA16:55Seattle/Tacoma Intl

8 Feb

SEA14:10Seattle/Tacoma Intl

36h 30m

2 stops

BHD10:40Belfast City

£528

British Airways

4 Feb

BHD12:25Belfast City

12h 30m

1 stop

SEA16:55Seattle/Tacoma Intl

8 Feb

SEA14:10Seattle/Tacoma Intl

36h 30m

2 stops

BHD10:40Belfast City

£530

British Airways

4 Feb

BHD06:35Belfast City

23h 32m

2 stops

SEA22:07Seattle/Tacoma Intl

8 Feb

SEA14:10Seattle/Tacoma Intl

36h 30m

2 stops

BHD10:40Belfast City

£531

Fly from

Fly to

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

mer. 4/2

11:25-16:55

1 stop13h 30m

Seattle/Tacoma Intl

dim. 8/2

14:10-10:40

2 stops36h 30m

£528

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

mer. 4/2

12:25-16:55

1 stop12h 30m

Seattle/Tacoma Intl

dim. 8/2

14:10-10:40

2 stops36h 30m

£530

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

mer. 4/2

06:35-22:07

2 stops23h 32m

Seattle/Tacoma Intl

dim. 8/2

14:10-10:40

2 stops36h 30m

£531

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

mer. 4/2

06:35-22:07

2 stops23h 32m

Seattle/Tacoma Intl

dim. 8/2

14:10-10:40

2 stops36h 30m

£533

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

sam. 7/3

09:15-16:55

1 stop15h 40m

Seattle/Tacoma Intl

lun. 9/3

07:15-10:40

2 stops20h 25m

£535

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

sam. 7/3

06:35-11:30

1 stop12h 55m

Seattle/Tacoma Intl

lun. 9/3

19:50-18:35

1 stop15h 45m

£536

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

sam. 7/3

06:35-16:55

1 stop18h 20m

Seattle/Tacoma Intl

lun. 9/3

13:37-14:15

2 stops17h 38m

£537

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

sam. 7/3

09:15-23:04

2 stops21h 49m

Seattle/Tacoma Intl

lun. 9/3

13:37-18:35

2 stops21h 58m

£539

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

mer. 28/1

06:30-09:15

3 stops34h 45m

Seattle/Tacoma Intl

jeu. 29/1

14:35-21:05

3 stops22h 30m

£669

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

mer. 28/1

06:30-22:16

2 stops23h 46m

Seattle/Tacoma Intl

jeu. 29/1

14:35-21:05

3 stops22h 30m

£734

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

How to get the cheapest flight ticket from Belfast 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 Belfast to Washington?

American Airlines is the most popular carrier operating from Belfast to Washington

Cheap Belfast to State of Washington flight deals and tips

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

Fastest flight time	12h 55m
Direct flights	None

The fastest flight from Belfast to State of Washington takes 12h 55m

There are no direct flights from Belfast to State of Washington. There are no popular flight routes from Belfast to State of Washington.

Search flight deals

When did momondo last update prices for flights from Belfast to Washington?
Prices for flights from Belfast to Washington were last updated today.
How many operators does momondo search for flights from Belfast to Washington?
There are 2 operators available for flights from Belfast to Washington as of January 2026.
How old do you have to be to fly from Belfast 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 Belfast to Washington.
What documentation or ID do you need to fly to Washington?
The necessary travel and health documents for your Washington trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Belfast to State of Washington

Compare and see reviews for airlines that fly from Belfast to State of Washington with momondo

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom £438	Free Cancellation	Rating 6.7 7,659 reviews		Search British Airways flights
American Airlines	PriceFrom £559	Free Cancellation	Rating 7.2 11,097 reviews		Search American Airlines flights

Why use momondo?

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

Finding the right flight to Washington from Belfast is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Washington from Belfast with this policy.

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

Once all potential Belfast to Washington flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes momondo offers price alerts on flights to Washington from Belfast. 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.