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 November 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.

£576 Cheap Flights from Belfast to Washington in 2025/26

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Round-trip

Cheap return flights

Enter your travel dates to find the best prices.

07:00 - 20:45BFS-SEA

21h 45m2 stops

19:00 - 23:20SEA-BFS

20h 20m2 stops

£576Multiple Airlines

Find Deal

Wed, 22 Apr - Tue, 5 May

15:05 - 16:55BHD-SEA

33h 50m1 stop

07:00 - 14:15SEA-BHD

24h 15m2 stops

£654American Airlines

Find Deal

Thu, 5 Mar - Mon, 9 Mar

15:05 - 11:30BHD-SEA

28h 25m1 stop

19:50 - 18:35SEA-BHD

15h 45m1 stop

£655American Airlines

Find Deal

Thu, 5 Mar - Mon, 9 Mar

09:05 - 23:32BHD-SEA

22h 27m2 stops

07:00 - 10:40SEA-BHD

20h 40m2 stops

£658American Airlines

Find Deal

Thu, 5 Mar - Mon, 9 Mar

10:40 - 23:32BHD-SEA

20h 52m2 stops

07:00 - 10:40SEA-BHD

20h 40m2 stops

£659American Airlines

Find Deal

Thu, 5 Mar - Mon, 9 Mar

08:55 - 18:25BFS-SEA

17h 30m1 stop

13:35 - 23:20SEA-BFS

25h 45m1 stop

£702Multiple Airlines

Find Deal

Wed, 22 Apr - Tue, 5 May

08:15 - 19:18BFS-SEA

19h 03m2 stops

14:05 - 23:20SEA-BFS

25h 15m3 stops

£789Multiple Airlines

Find Deal

Wed, 22 Apr - Tue, 5 May

20:10 - 20:45BFS-SEA

32h 35m3 stops

14:05 - 23:20SEA-BFS

25h 15m3 stops

£793Multiple Airlines

Find Deal

Wed, 22 Apr - Tue, 5 May

06:35 - 16:55BHD-SEA

18h 20m1 stop

18:50 - 16:40SEA-BHD

13h 50m1 stop

£821American Airlines

Find Deal

Thu, 27 Nov - Thu, 4 Dec

06:30 - 17:10BHD-SEA

18h 40m2 stops

13:40 - 16:50SEA-BHD

19h 10m2 stops

£1,148KLM

Find Deal

Thu, 27 Nov - Thu, 4 Dec

British Airways flights from Belfast to State of Washington

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

British Airways

22 Apr

BHD10:00Belfast City

16h 25m

1 stop

SEA18:25Seattle/Tacoma Intl

5 May

SEA13:35Seattle/Tacoma Intl

15h 25m

1 stop

BHD13:00Belfast City

£621

Find similar

British Airways

26 Nov

BHD09:15Belfast City

15h 40m

1 stop

SEA16:55Seattle/Tacoma Intl

4 Dec

SEA18:50Seattle/Tacoma Intl

15h 10m

1 stop

BHD18:00Belfast City

£775

Find similar

British Airways

26 Nov

BHD12:25Belfast City

18h 53m

2 stops

SEA23:18Seattle/Tacoma Intl

4 Dec

SEA18:50Seattle/Tacoma Intl

13h 50m

1 stop

BHD16:40Belfast City

£779

Find similar

American Airlines flights from Belfast to State of Washington

Our best American Airlines deals on Belfast to State of Washington flight tickets

American Airlines

21 Jan

BHD09:15Belfast City

35h 59m

2 stops

SEA13:14Seattle/Tacoma Intl

25 Jan

SEA14:04Seattle/Tacoma Intl

40h 11m

2 stops

BHD14:15Belfast City

£640

Find similar

American Airlines

29 Jan

BHD09:05Belfast City

15h 50m

1 stop

SEA16:55Seattle/Tacoma Intl

2 Feb

SEA18:50Seattle/Tacoma Intl

13h 15m

1 stop

BHD16:05Belfast City

£654

Find similar

American Airlines

5 Mar

BHD10:40Belfast City

32h 50m

1 stop

SEA11:30Seattle/Tacoma Intl

9 Mar

SEA07:00Seattle/Tacoma Intl

24h 15m

2 stops

BHD14:15Belfast City

£655

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Wed 22/4

07:00-20:45

2 stops21h 45m

Seattle/Tacoma Intl

Tue 5/5

19:00-23:20

2 stops20h 20m

£576

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

15:05-16:55

1 stop33h 50m

Seattle/Tacoma Intl

Mon 9/3

07:00-14:15

2 stops24h 15m

£654

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

15:05-11:30

1 stop28h 25m

Seattle/Tacoma Intl

Mon 9/3

19:50-18:35

1 stop15h 45m

£655

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

09:05-23:32

2 stops22h 27m

Seattle/Tacoma Intl

Mon 9/3

07:00-10:40

2 stops20h 40m

£658

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

10:40-23:32

2 stops20h 52m

Seattle/Tacoma Intl

Mon 9/3

07:00-10:40

2 stops20h 40m

£659

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Wed 22/4

08:55-18:25

1 stop17h 30m

Seattle/Tacoma Intl

Tue 5/5

13:35-23:20

1 stop25h 45m

£702

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Wed 22/4

08:15-19:18

2 stops19h 03m

Seattle/Tacoma Intl

Tue 5/5

14:05-23:20

3 stops25h 15m

£789

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Wed 22/4

20:10-20:45

3 stops32h 35m

Seattle/Tacoma Intl

Tue 5/5

14:05-23:20

3 stops25h 15m

£793

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 27/11

06:35-16:55

1 stop18h 20m

Seattle/Tacoma Intl

Thu 4/12

18:50-16:40

1 stop13h 50m

£821

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 27/11

06:30-17:10

2 stops18h 40m

Seattle/Tacoma Intl

Thu 4/12

13:40-16:50

2 stops19h 10m

£1,148

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

Direct flights	None

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 November 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 £447	Free Cancellation	Rating 6.7 7,528 reviews		Search British Airways flights
American Airlines	PriceFrom £571	Free Cancellation	Rating 7.2 11,047 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.