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.

£363 Cheap Flights from Belfast to Washington in 2026

Find the cheapest flights from Belfast to Washington

Return

One-way

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

20:20 - 20:35SEA Seattle/Tacoma Intl-BHD Belfast City

16h 15m1 stop London Heathrow

£721British Airways

Wed, 7 Oct - Sun, 11 Oct

10:05 - 18:25BHD Belfast City-SEA Seattle/Tacoma Intl

16h 20m1 stop London Heathrow

06:12 - 14:35SEA Seattle/Tacoma Intl-BHD Belfast City

24h 23m2 stops Chicago O'Hare Intl London Heathrow

£723British Airways

Wed, 7 Oct - Sun, 11 Oct

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

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

06:12 - 14:35SEA Seattle/Tacoma Intl-BHD Belfast City

24h 23m2 stops Chicago O'Hare Intl London Heathrow

£726British Airways

Wed, 7 Oct - Sun, 11 Oct

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

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

06:12 - 14:35SEA Seattle/Tacoma Intl-BHD Belfast City

24h 23m2 stops Chicago O'Hare Intl London Heathrow

£726British Airways

Wed, 7 Oct - Sun, 11 Oct

06:30 - 11:35BHD Belfast City-SEA Seattle/Tacoma Intl

13h 05m1 stop London Heathrow

13:30 - 20:35SEA Seattle/Tacoma Intl-BHD Belfast City

23h 05m1 stop London Heathrow

£739British Airways

Sun, 6 Sep - Sun, 13 Sep

08:45 - 11:45BHD Belfast City-SEA Seattle/Tacoma Intl

35h 00m2 stops London Gatwick Reykjavik Keflavik Intl

19:00 - 20:30SEA Seattle/Tacoma Intl-BHD Belfast City

17h 30m2 stops Reykjavik Keflavik Intl London Gatwick

£745Multiple Airlines

Mon, 7 Sep - Fri, 11 Sep

06:30 - 11:35BHD Belfast City-SEA Seattle/Tacoma Intl

13h 05m1 stop London Heathrow

13:40 - 18:45SEA Seattle/Tacoma Intl-BHD Belfast City

21h 05m2 stops Chicago O'Hare Intl London Heathrow

£746British Airways

Sun, 6 Sep - Sun, 13 Sep

11:00 - 00:13BHD Belfast City-SEA Seattle/Tacoma Intl

21h 13m2 stops London Heathrow Chicago O'Hare Intl

13:40 - 18:45SEA Seattle/Tacoma Intl-BHD Belfast City

21h 05m2 stops Chicago O'Hare Intl London Heathrow

£748British Airways

Sun, 6 Sep - Sun, 13 Sep

06:10 - 09:40BFS Belfast Intl-SEA Seattle/Tacoma Intl

35h 30m3 stops London Gatwick Montreal Pierre Elliott Trudeau Intl Calgary

15:40 - 23:20SEA Seattle/Tacoma Intl-BFS Belfast Intl

23h 40m3 stops Reykjavik Keflavik Intl Milan Malpensa London Stansted

£767Multiple Airlines

Mon, 7 Sep - Fri, 11 Sep

09:50 - 11:45BHD Belfast City-SEA Seattle/Tacoma Intl

33h 55m3 stops Amsterdam Schiphol London Heathrow Reykjavik Keflavik Intl

15:40 - 20:30SEA Seattle/Tacoma Intl-BHD Belfast City

20h 50m2 stops Reykjavik Keflavik Intl London Gatwick

£822Multiple Airlines

Mon, 7 Sep - Fri, 11 Sep

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KLM flights from Belfast to State of Washington

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

KLM

20 Aug

BHD09:50Belfast City

14h 37m

1 stop

SEA16:27Seattle/Tacoma Intl

24 Aug

SEA13:50Seattle/Tacoma Intl

19h 05m

1 stop

BHD16:55Belfast City

£5,874

KLM

19 Aug

BHD17:30Belfast City

26h 07m

1 stop

SEA11:37Seattle/Tacoma Intl

24 Aug

SEA17:45Seattle/Tacoma Intl

15h 10m

1 stop

BHD16:55Belfast City

£5,889

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

£3,283

Aer Lingus

20 Aug

BHD18:30Belfast City

30h 40m

2 stops

SEA17:10Seattle/Tacoma Intl

24 Aug

SEA19:10Seattle/Tacoma Intl

17h 40m

2 stops

BHD20:50Belfast City

£3,287

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Wed 7/10

11:35-11:35

1 stop32h 00m

Seattle/Tacoma Intl

Sun 11/10

20:20-20:35

1 stop16h 15m

£721

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Wed 7/10

10:05-18:25

1 stop16h 20m

Seattle/Tacoma Intl

Sun 11/10

06:12-14:35

2 stops24h 23m

£723

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Wed 7/10

11:35-00:36

2 stops21h 01m

Seattle/Tacoma Intl

Sun 11/10

06:12-14:35

2 stops24h 23m

£726

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Wed 7/10

11:35-00:36

2 stops21h 01m

Seattle/Tacoma Intl

Sun 11/10

06:12-14:35

2 stops24h 23m

£726

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Sun 6/9

06:30-11:35

1 stop13h 05m

Seattle/Tacoma Intl

Sun 13/9

13:30-20:35

1 stop23h 05m

£739

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Mon 7/9

08:45-11:45

2 stops35h 00m

Seattle/Tacoma Intl

Fri 11/9

19:00-20:30

2 stops17h 30m

£745

Fastest return journey

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Sun 6/9

06:30-11:35

1 stop13h 05m

Seattle/Tacoma Intl

Sun 13/9

13:40-18:45

2 stops21h 05m

£746

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Sun 6/9

11:00-00:13

2 stops21h 13m

Seattle/Tacoma Intl

Sun 13/9

13:40-18:45

2 stops21h 05m

£748

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Mon 7/9

06:10-09:40

3 stops35h 30m

Seattle/Tacoma Intl

Fri 11/9

15:40-23:20

3 stops23h 40m

£767

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Mon 7/9

09:50-11:45

3 stops33h 55m

Seattle/Tacoma Intl

Fri 11/9

15:40-20:30

2 stops20h 50m

£822

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?

Aer Lingus 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 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.

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.