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 February 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.

£474 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

Enter your travel dates to find the best prices.

06:40 - 20:40

BFS

SEA

22h 00m

2 stops

19:00 - 16:15

SEA

BFS

13h 15m

2 stops

£611Multiple Airlines

Mon, 20 Apr - Mon, 4 May

19:35 - 20:40

BFS

SEA

33h 05m

3 stops

15:40 - 16:15

SEA

BFS

16h 35m

2 stops

£619Multiple Airlines

Mon, 20 Apr - Mon, 4 May

17:30 - 11:45

BHD

SEA

26h 15m

1 stop

08:50 - 09:20

SEA

BHD

16h 30m

2 stops

£645KLM

Mon, 20 Apr - Mon, 4 May

19:35 - 17:55

BFS

SEA

30h 20m

3 stops

15:40 - 23:20

SEA

BFS

23h 40m

3 stops

£646Multiple Airlines

Mon, 20 Apr - Mon, 4 May

19:35 - 11:35

BHD

SEA

24h 00m

1 stop

13:35 - 19:25

SEA

BHD

21h 50m

1 stop

£648Multiple Airlines

Mon, 20 Apr - Mon, 4 May

11:35 - 00:30

BHD

SEA

20h 55m

2 stops

15:17 - 15:30

SEA

BHD

16h 13m

2 stops

£665British Airways

Mon, 20 Apr - Mon, 4 May

20:10 - 17:10

BFS

SEA

29h 00m

3 stops

19:00 - 19:40

SEA

BFS

16h 40m

2 stops

£673Multiple Airlines

Tue, 31 Mar - Tue, 7 Apr

06:35 - 11:30

BHD

SEA

12h 55m

1 stop

07:21 - 11:30

SEA

BHD

21h 09m

2 stops

£678British Airways

Sat, 7 Mar - Tue, 10 Mar

06:35 - 11:30

BHD

SEA

12h 55m

1 stop

07:21 - 10:30

SEA

BHD

20h 09m

2 stops

£681British Airways

Sat, 7 Mar - Tue, 10 Mar

06:35 - 11:30

BHD

SEA

12h 55m

1 stop

19:50 - 16:45

SEA

BHD

13h 55m

1 stop

£682British Airways

Sat, 7 Mar - Tue, 10 Mar

British Airways flights from Belfast to State of Washington

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

British Airways

20 Apr

BHD11:35Belfast City

20h 55m

2 stops

SEA00:30Seattle/Tacoma Intl

4 May

SEA15:17Seattle/Tacoma Intl

16h 13m

2 stops

BHD15:30Belfast City

£665

British Airways

7 Mar

BHD06:35Belfast City

12h 55m

1 stop

SEA11:30Seattle/Tacoma Intl

10 Mar

SEA07:21Seattle/Tacoma Intl

21h 09m

2 stops

BHD11:30Belfast City

£678

British Airways

7 Mar

BHD06:35Belfast City

12h 55m

1 stop

SEA11:30Seattle/Tacoma Intl

10 Mar

SEA07:21Seattle/Tacoma Intl

20h 09m

2 stops

BHD10:30Belfast City

£681

Fly from

Fly to

Route

Depart

Return

Price

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 20/4

06:40-20:40

2 stops22h 00m

Seattle/Tacoma Intl

Mon 4/5

19:00-16:15

2 stops13h 15m

£611

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 20/4

19:35-20:40

3 stops33h 05m

Seattle/Tacoma Intl

Mon 4/5

15:40-16:15

2 stops16h 35m

£619

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 20/4

17:30-11:45

1 stop26h 15m

Seattle/Tacoma Intl

Mon 4/5

08:50-09:20

2 stops16h 30m

£645

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 20/4

19:35-17:55

3 stops30h 20m

Seattle/Tacoma Intl

Mon 4/5

15:40-23:20

3 stops23h 40m

£646

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 20/4

19:35-11:35

1 stop24h 00m

Seattle/Tacoma Intl

Mon 4/5

13:35-19:25

1 stop21h 50m

£648

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 20/4

11:35-00:30

2 stops20h 55m

Seattle/Tacoma Intl

Mon 4/5

15:17-15:30

2 stops16h 13m

£665

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Tue 31/3

20:10-17:10

3 stops29h 00m

Seattle/Tacoma Intl

Tue 7/4

19:00-19:40

2 stops16h 40m

£673

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 7/3

06:35-11:30

1 stop12h 55m

Seattle/Tacoma Intl

Tue 10/3

07:21-11:30

2 stops21h 09m

£678

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 7/3

06:35-11:30

1 stop12h 55m

Seattle/Tacoma Intl

Tue 10/3

07:21-10:30

2 stops20h 09m

£681

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 7/3

06:35-11:30

1 stop12h 55m

Seattle/Tacoma Intl

Tue 10/3

19:50-16:45

1 stop13h 55m

£682

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	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 is 1 operator available for flights from Belfast to Washington as of February 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 £553	Free Cancellation	Rating 7.2 11,307 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.