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 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.

£324 Cheap Flights from Belfast to Washington in 2026

Find the cheapest flights from Belfast to Washington

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

11:35 - 11:35BHD Belfast City-SEA Seattle/Tacoma Intl

32h 00m1 stop London Heathrow

13:30 - 10:10SEA Seattle/Tacoma Intl-BHD Belfast City

12h 40m1 stop London Heathrow

£641Iberia

Mon, 5 Oct - Thu, 22 Oct

11:35 - 00:36BHD Belfast City-SEA Seattle/Tacoma Intl

21h 01m2 stops London Heathrow Chicago O'Hare Intl

15:14 - 15:30SEA Seattle/Tacoma Intl-BHD Belfast City

16h 16m2 stops Chicago O'Hare Intl London Heathrow

£645Iberia

Mon, 5 Oct - Thu, 22 Oct

21:10 - 09:40BFS Belfast Intl-SEA Seattle/Tacoma Intl

44h 30m3 stops London Gatwick Toronto Pearson Intl Calgary

15:40 - 21:00SEA Seattle/Tacoma Intl-BFS Belfast Intl

21h 20m2 stops Reykjavik Keflavik Intl Glasgow Intl

£653Multiple Airlines

Sun, 27 Sep - Sun, 4 Oct

21:10 - 09:40BFS Belfast Intl-SEA Seattle/Tacoma Intl

44h 30m3 stops London Gatwick Toronto Pearson Intl Calgary

15:40 - 20:55SEA Seattle/Tacoma Intl-BFS Belfast Intl

21h 15m3 stops Reykjavik Keflavik Intl Kastrup Copenhagen Edinburgh Turnhouse

£666Multiple Airlines

Sun, 27 Sep - Sun, 4 Oct

06:40 - 22:42BFS Belfast Intl-SEA Seattle/Tacoma Intl

24h 02m3 stops London Stansted Munich Franz Josef Strauss Vancouver Intl

19:00 - 23:05SEA Seattle/Tacoma Intl-BFS Belfast Intl

20h 05m2 stops Reykjavik Keflavik Intl Glasgow Intl

£700Multiple Airlines

Mon, 5 Oct - Thu, 22 Oct

06:40 - 22:42BFS Belfast Intl-SEA Seattle/Tacoma Intl

24h 02m3 stops London Stansted Munich Franz Josef Strauss Vancouver Intl

19:00 - 23:25SEA Seattle/Tacoma Intl-BFS Belfast Intl

20h 25m3 stops Reykjavik Keflavik Intl Kastrup Copenhagen London Stansted

£704Multiple Airlines

Mon, 5 Oct - Thu, 22 Oct

06:15 - 09:40BFS Belfast Intl-SEA Seattle/Tacoma Intl

35h 25m3 stops London Gatwick Halifax Intl Calgary

19:00 - 21:05SEA Seattle/Tacoma Intl-BFS Belfast Intl

18h 05m2 stops Reykjavik Keflavik Intl London Gatwick

£708Multiple Airlines

Tue, 29 Sep - Tue, 6 Oct

07:10 - 13:45BFS Belfast Intl-SEA Seattle/Tacoma Intl

14h 35m2 stops Manchester Kastrup Copenhagen

15:55 - 21:30SEA Seattle/Tacoma Intl-BFS Belfast Intl

21h 35m2 stops Kastrup Copenhagen Manchester

£710Multiple Airlines

Sun, 27 Sep - Sun, 4 Oct

08:20 - 20:40BFS Belfast Intl-SEA Seattle/Tacoma Intl

20h 20m2 stops London Gatwick Reykjavik Keflavik Intl

19:00 - 21:05SEA Seattle/Tacoma Intl-BFS Belfast Intl

18h 05m2 stops Reykjavik Keflavik Intl London Gatwick

£711Multiple Airlines

Tue, 29 Sep - Tue, 6 Oct

07:40 - 16:50BHD Belfast City-SEA Seattle/Tacoma Intl

17h 10m1 stop London Heathrow

06:12 - 14:15SEA Seattle/Tacoma Intl-BHD Belfast City

24h 03m2 stops Chicago O'Hare Intl London Heathrow

£720British Airways

Thu, 5 Nov - Mon, 9 Nov

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Aer Lingus flights from Belfast to State of Washington

Our best Aer Lingus deals on Belfast to State of Washington flight tickets

Aer Lingus

20 Aug

BHD09:50Belfast City

15h 20m

2 stops

SEA17:10Seattle/Tacoma Intl

24 Aug

SEA19:10Seattle/Tacoma Intl

17h 40m

2 stops

BHD20:50Belfast City

£3,281

Aer Lingus

20 Aug

BHD09:50Belfast City

15h 20m

2 stops

SEA17:10Seattle/Tacoma Intl

24 Aug

SEA19:10Seattle/Tacoma Intl

14h 50m

2 stops

BHD18:00Belfast City

£3,285

Aer Lingus

19 Aug

BHD09:50Belfast City

15h 20m

2 stops

SEA17:10Seattle/Tacoma Intl

24 Aug

SEA19:10Seattle/Tacoma Intl

17h 55m

2 stops

BHD21:05Belfast City

£3,293

Iberia flights from Belfast to State of Washington

Our best Iberia deals on Belfast to State of Washington flight tickets

Iberia

5 Oct

BHD11:35Belfast City

32h 00m

1 stop

SEA11:35Seattle/Tacoma Intl

22 Oct

SEA13:30Seattle/Tacoma Intl

12h 40m

1 stop

BHD10:10Belfast City

£641

Iberia

5 Oct

BHD11:35Belfast City

21h 01m

2 stops

SEA00:36Seattle/Tacoma Intl

22 Oct

SEA15:14Seattle/Tacoma Intl

16h 16m

2 stops

BHD15:30Belfast City

£645

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Mon 5/10

11:35-11:35

1 stop32h 00m

Seattle/Tacoma Intl

Thu 22/10

13:30-10:10

1 stop12h 40m

£641

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Mon 5/10

11:35-00:36

2 stops21h 01m

Seattle/Tacoma Intl

Thu 22/10

15:14-15:30

2 stops16h 16m

£645

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Sun 27/9

21:10-09:40

3 stops44h 30m

Seattle/Tacoma Intl

Sun 4/10

15:40-21:00

2 stops21h 20m

£653

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Sun 27/9

21:10-09:40

3 stops44h 30m

Seattle/Tacoma Intl

Sun 4/10

15:40-20:55

3 stops21h 15m

£666

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Mon 5/10

06:40-22:42

3 stops24h 02m

Seattle/Tacoma Intl

Thu 22/10

19:00-23:05

2 stops20h 05m

£700

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Mon 5/10

06:40-22:42

3 stops24h 02m

Seattle/Tacoma Intl

Thu 22/10

19:00-23:25

3 stops20h 25m

£704

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Tue 29/9

06:15-09:40

3 stops35h 25m

Seattle/Tacoma Intl

Tue 6/10

19:00-21:05

2 stops18h 05m

£708

Fastest return journey

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Sun 27/9

07:10-13:45

2 stops14h 35m

Seattle/Tacoma Intl

Sun 4/10

15:55-21:30

2 stops21h 35m

£710

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Tue 29/9

08:20-20:40

2 stops20h 20m

Seattle/Tacoma Intl

Tue 6/10

19:00-21:05

2 stops18h 05m

£711

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 5/11

07:40-16:50

1 stop17h 10m

Seattle/Tacoma Intl

Mon 9/11

06:12-14:15

2 stops24h 03m

£720

Flights are sorted by cheapest return flights first.

Showing 1-10 of 16 resultsSorted 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

Best price found	£324
Fastest flight time	13h 05m
Direct flights	None

The best one-way flight to State of Washington from Belfast in the past 72 hours is £324. The best return flight deal from Belfast to State of Washington found on momondo in the last 72 hours is £641.

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.

Search flight deals

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 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.

Frequently asked questions about flying from Belfast to Washington

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.