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 is 1 operator available for flights from Belfast to Washington as of April 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.

£348 Cheap Flights from Belfast to Washington in 2026

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Find the cheapest flights from Belfast to Washington

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

08:45 - 20:40

BHD

SEA

19h 55m

2 stops

19:00 - 20:30

SEA

BHD

17h 30m

2 stops

£700Multiple Airlines

Mon, 14 Sep - Sun, 20 Sep

08:15 - 20:40

BFS

SEA

20h 25m

2 stops

15:40 - 20:15

SEA

BFS

20h 35m

2 stops

£701Multiple Airlines

Mon, 14 Sep - Sun, 20 Sep

19:35 - 17:29

BHD

SEA

29h 54m

2 stops

20:20 - 18:45

SEA

BHD

14h 25m

1 stop

£729British Airways

Mon, 14 Sep - Sun, 20 Sep

19:35 - 11:35

BHD

SEA

24h 00m

1 stop

20:20 - 18:45

SEA

BHD

14h 25m

1 stop

£730British Airways

Mon, 14 Sep - Sun, 20 Sep

08:15 - 20:40

BFS

SEA

20h 25m

2 stops

15:40 - 22:35

SEA

BFS

22h 55m

3 stops

£731Multiple Airlines

Mon, 14 Sep - Sun, 20 Sep

11:35 - 00:36

BHD

SEA

21h 01m

2 stops

13:30 - 12:00

SEA

BHD

14h 30m

1 stop

£754British Airways

Wed, 13 May - Wed, 20 May

06:30 - 11:35

BHD

SEA

13h 05m

1 stop

13:30 - 10:30

SEA

BHD

13h 00m

1 stop

£763British Airways

Wed, 14 Oct - Sun, 18 Oct

06:30 - 11:35

BHD

SEA

13h 05m

1 stop

11:34 - 17:40

SEA

BHD

22h 06m

2 stops

£769British Airways

Wed, 14 Oct - Sun, 18 Oct

11:35 - 18:25

BHD

SEA

14h 50m

1 stop

13:30 - 12:00

SEA

BHD

14h 30m

1 stop

£773British Airways

Wed, 13 May - Wed, 20 May

20:55 - 18:32

BFS

SEA

29h 37m

3 stops

15:40 - 22:35

SEA

BFS

22h 55m

3 stops

£773Multiple Airlines

Mon, 14 Sep - Sun, 20 Sep

British Airways flights from Belfast to State of Washington

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

British Airways

14 Sept

BHD19:35Belfast City

29h 54m

2 stops

SEA17:29Seattle/Tacoma Intl

20 Sept

SEA20:20Seattle/Tacoma Intl

14h 25m

1 stop

BHD18:45Belfast City

£729

British Airways

14 Sept

BHD19:35Belfast City

24h 00m

1 stop

SEA11:35Seattle/Tacoma Intl

20 Sept

SEA20:20Seattle/Tacoma Intl

14h 25m

1 stop

BHD18:45Belfast City

£730

British Airways

13 May

BHD11:35Belfast City

21h 01m

2 stops

SEA00:36Seattle/Tacoma Intl

20 May

SEA13:30Seattle/Tacoma Intl

14h 30m

1 stop

BHD12:00Belfast City

£754

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 14/9

08:45-20:40

2 stops19h 55m

Seattle/Tacoma Intl

Sun 20/9

19:00-20:30

2 stops17h 30m

£700

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 14/9

08:15-20:40

2 stops20h 25m

Seattle/Tacoma Intl

Sun 20/9

15:40-20:15

2 stops20h 35m

£701

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 14/9

19:35-17:29

2 stops29h 54m

Seattle/Tacoma Intl

Sun 20/9

20:20-18:45

1 stop14h 25m

£729

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 14/9

19:35-11:35

1 stop24h 00m

Seattle/Tacoma Intl

Sun 20/9

20:20-18:45

1 stop14h 25m

£730

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 14/9

08:15-20:40

2 stops20h 25m

Seattle/Tacoma Intl

Sun 20/9

15:40-22:35

3 stops22h 55m

£731

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 13/5

11:35-00:36

2 stops21h 01m

Seattle/Tacoma Intl

Wed 20/5

13:30-12:00

1 stop14h 30m

£754

Fastest return journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 14/10

06:30-11:35

1 stop13h 05m

Seattle/Tacoma Intl

Sun 18/10

13:30-10:30

1 stop13h 00m

£763

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 14/10

06:30-11:35

1 stop13h 05m

Seattle/Tacoma Intl

Sun 18/10

11:34-17:40

2 stops22h 06m

£769

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 13/5

11:35-18:25

1 stop14h 50m

Seattle/Tacoma Intl

Wed 20/5

13:30-12:00

1 stop14h 30m

£773

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 14/9

20:55-18:32

3 stops29h 37m

Seattle/Tacoma Intl

Sun 20/9

15:40-22:35

3 stops22h 55m

£773

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 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?

British Airways 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	13h 05m
Direct flights	None

The fastest flight from Belfast to State of Washington takes 13h 05m

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

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Frequently asked questions about flying from Belfast to Washington

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 is 1 operator available for flights from Belfast to Washington as of April 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
American Airlines	PriceFrom £554	Free Cancellation	Rating 7.1 11,593 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.