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

Confirm your travel details to search for the latest offers for flights from Belfast to State of Washington . While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

How can I save money on flights from Belfast to State of Washington with momondo?

By using tools like our “Price Calendar”, you can see the best days for return flights on your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

How does momondo find its flight prices?

momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

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 December 2025.

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.

£627 Cheap Flights from Belfast to Washington in 2025/26

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0 bags

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Find the cheapest flights from Belfast to Washington

Round-trip

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Enter your travel dates to find the best prices.

12:25 - 16:55

BHD

SEA

12h 30m1 stop

14:04 - 14:15

SEA

BHD

40h 11m2 stops

£627British Airways

Wed, 28 Jan - Sun, 1 Feb

12:25 - 16:55

BHD

SEA

12h 30m1 stop

14:04 - 10:40

SEA

BHD

36h 36m2 stops

£628British Airways

Wed, 28 Jan - Sun, 1 Feb

06:35 - 13:14

BHD

SEA

38h 39m2 stops

14:04 - 14:15

SEA

BHD

40h 11m2 stops

£631British Airways

Wed, 28 Jan - Sun, 1 Feb

11:25 - 16:55

BHD

SEA

13h 30m1 stop

08:04 - 10:20

SEA

BHD

18h 16m2 stops

£653British Airways

Wed, 4 Feb - Sun, 8 Feb

11:25 - 16:55

BHD

SEA

13h 30m1 stop

18:50 - 16:50

SEA

BHD

14h 00m1 stop

£656British Airways

Wed, 4 Feb - Sun, 8 Feb

06:35 - 22:07

BHD

SEA

23h 32m2 stops

08:04 - 10:20

SEA

BHD

18h 16m2 stops

£662British Airways

Wed, 4 Feb - Sun, 8 Feb

06:35 - 22:07

BHD

SEA

23h 32m2 stops

08:04 - 13:55

SEA

BHD

21h 51m2 stops

£665British Airways

Wed, 4 Feb - Sun, 8 Feb

18:25 - 15:40

BFS

SEA

29h 15m3 stops

14:35 - 20:20

SEA

BFS

21h 45m2 stops

£791Multiple Airlines

Sun, 25 Jan - Sun, 1 Feb

07:10 - 17:00

BFS

SEA

17h 50m2 stops

14:35 - 20:20

SEA

BFS

21h 45m2 stops

£845Multiple Airlines

Sun, 25 Jan - Sun, 1 Feb

22:45 - 15:40

BFS

SEA

24h 55m3 stops

14:35 - 21:55

SEA

BFS

23h 20m3 stops

£857Multiple Airlines

Sun, 25 Jan - Sun, 1 Feb

British Airways flights from Belfast to State of Washington

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

British Airways

28 Jan

BHD12:25Belfast City

12h 30m

1 stop

SEA16:55Seattle/Tacoma Intl

1 Feb

SEA14:04Seattle/Tacoma Intl

40h 11m

2 stops

BHD14:15Belfast City

£627

Find similar

British Airways

28 Jan

BHD09:15Belfast City

35h 59m

2 stops

SEA13:14Seattle/Tacoma Intl

1 Feb

SEA14:04Seattle/Tacoma Intl

36h 36m

2 stops

BHD10:40Belfast City

£628

Find similar

British Airways

28 Jan

BHD06:35Belfast City

38h 39m

2 stops

SEA13:14Seattle/Tacoma Intl

1 Feb

SEA14:04Seattle/Tacoma Intl

40h 11m

2 stops

BHD14:15Belfast City

£631

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 28/1

12:25-16:55

1 stop12h 30m

Seattle/Tacoma Intl

Sun 1/2

14:04-14:15

2 stops40h 11m

£627

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 28/1

12:25-16:55

1 stop12h 30m

Seattle/Tacoma Intl

Sun 1/2

14:04-10:40

2 stops36h 36m

£628

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 28/1

06:35-13:14

2 stops38h 39m

Seattle/Tacoma Intl

Sun 1/2

14:04-14:15

2 stops40h 11m

£631

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/2

11:25-16:55

1 stop13h 30m

Seattle/Tacoma Intl

Sun 8/2

08:04-10:20

2 stops18h 16m

£653

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/2

11:25-16:55

1 stop13h 30m

Seattle/Tacoma Intl

Sun 8/2

18:50-16:50

1 stop14h 00m

£656

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/2

06:35-22:07

2 stops23h 32m

Seattle/Tacoma Intl

Sun 8/2

08:04-10:20

2 stops18h 16m

£662

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/2

06:35-22:07

2 stops23h 32m

Seattle/Tacoma Intl

Sun 8/2

08:04-13:55

2 stops21h 51m

£665

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sun 25/1

18:25-15:40

3 stops29h 15m

Seattle/Tacoma Intl

Sun 1/2

14:35-20:20

2 stops21h 45m

£791

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sun 25/1

07:10-17:00

2 stops17h 50m

Seattle/Tacoma Intl

Sun 1/2

14:35-20:20

2 stops21h 45m

£845

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sun 25/1

22:45-15:40

3 stops24h 55m

Seattle/Tacoma Intl

Sun 1/2

14:35-21:55

3 stops23h 20m

£857

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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 30m
Direct flights	None

The fastest flight from Belfast to State of Washington takes 13h 30m

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 December 2025.
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 £439	Free Cancellation	Rating 6.7 7,571 reviews		Search British Airways flights
American Airlines	PriceFrom £561	Free Cancellation	Rating 7.2 11,049 reviews		Search American Airlines flights

How do I get Price Alerts for flights from Belfast to State of Washington?
Confirm your travel details to search for the latest offers for flights from Belfast to State of Washington. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.
How can I save money on flights from Belfast to State of Washington with momondo?
By using tools like our “Price Calendar”, you can see the best days for return flights on your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.
How does momondo find its flight prices?
momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

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.