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 June 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.

£403 Cheap Flights from Belfast to Washington in 2026

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

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.

20:35 - 11:35

BHD

SEA

23h 00m

1 stop

11:34 - 12:00

SEA

BHD

16h 26m

2 stops

£548British Airways

Wed, 16 Sep - Wed, 7 Oct

20:35 - 11:35

BHD

SEA

23h 00m

1 stop

13:30 - 12:00

SEA

BHD

14h 30m

1 stop

£549British Airways

Wed, 23 Sep - Wed, 14 Oct

20:35 - 11:35

BHD

SEA

23h 00m

1 stop

20:20 - 19:50

SEA

BHD

15h 30m

1 stop

£575British Airways

Wed, 23 Sep - Wed, 14 Oct

10:05 - 21:36

BHD

SEA

19h 31m

2 stops

11:34 - 12:00

SEA

BHD

16h 26m

2 stops

£579British Airways

Wed, 16 Sep - Wed, 7 Oct

09:40 - 21:36

BHD

SEA

19h 56m

2 stops

20:20 - 17:35

SEA

BHD

13h 15m

1 stop

£580British Airways

Tue, 15 Sep - Tue, 6 Oct

17:30 - 11:47

BHD

SEA

26h 17m

1 stop

09:30 - 09:20

SEA

BHD

15h 50m

2 stops

£585KLM

Wed, 23 Sep - Wed, 14 Oct

09:40 - 21:36

BHD

SEA

19h 56m

2 stops

12:00 - 15:20

SEA

BHD

19h 20m

2 stops

£588British Airways

Tue, 15 Sep - Tue, 6 Oct

09:50 - 22:02

BHD

SEA

20h 12m

2 stops

09:30 - 09:20

SEA

BHD

15h 50m

2 stops

£592Multiple Airlines

Wed, 23 Sep - Wed, 14 Oct

09:50 - 11:47

BHD

SEA

33h 57m

1 stop

17:45 - 16:55

SEA

BHD

15h 10m

2 stops

£597KLM

Wed, 23 Sep - Wed, 14 Oct

09:50 - 11:47

BHD

SEA

33h 57m

1 stop

17:45 - 16:55

SEA

BHD

15h 10m

1 stop

£598KLM

Tue, 15 Sep - Tue, 6 Oct

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

KLM flights from Belfast to State of Washington

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

KLM

23 Sept

BHD17:30Belfast City

26h 17m

1 stop

SEA11:47Seattle/Tacoma Intl

14 Oct

SEA09:30Seattle/Tacoma Intl

15h 50m

2 stops

BHD09:20Belfast City

£585

KLM

15 Sept

BHD09:50Belfast City

33h 57m

1 stop

SEA11:47Seattle/Tacoma Intl

6 Oct

SEA17:45Seattle/Tacoma Intl

15h 10m

1 stop

BHD16:55Belfast City

£598

KLM

22 Jun

BHD10:05Belfast City

33h 32m

1 stop

SEA11:37Seattle/Tacoma Intl

28 Jun

SEA09:30Seattle/Tacoma Intl

16h 05m

2 stops

BHD09:35Belfast City

£618

American Airlines flights from Belfast to State of Washington

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

American Airlines

19 Jul

BHD06:30Belfast City

25h 09m

2 stops

SEA23:39Seattle/Tacoma Intl

27 Jul

SEA11:07Seattle/Tacoma Intl

20h 23m

2 stops

BHD15:30Belfast City

£710

American Airlines

19 Jul

BHD06:30Belfast City

13h 05m

1 stop

SEA11:35Seattle/Tacoma Intl

27 Jul

SEA13:30Seattle/Tacoma Intl

15h 25m

1 stop

BHD12:55Belfast City

£740

American Airlines

19 Jul

BHD06:30Belfast City

13h 05m

1 stop

SEA11:35Seattle/Tacoma Intl

27 Jul

SEA20:20Seattle/Tacoma Intl

14h 25m

1 stop

BHD18:45Belfast City

£742

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 16/9

20:35-11:35

1 stop23h 00m

Seattle/Tacoma Intl

Wed 7/10

11:34-12:00

2 stops16h 26m

£548

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 23/9

20:35-11:35

1 stop23h 00m

Seattle/Tacoma Intl

Wed 14/10

13:30-12:00

1 stop14h 30m

£549

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 23/9

20:35-11:35

1 stop23h 00m

Seattle/Tacoma Intl

Wed 14/10

20:20-19:50

1 stop15h 30m

£575

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 16/9

10:05-21:36

2 stops19h 31m

Seattle/Tacoma Intl

Wed 7/10

11:34-12:00

2 stops16h 26m

£579

Fastest return journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 15/9

09:40-21:36

2 stops19h 56m

Seattle/Tacoma Intl

Tue 6/10

20:20-17:35

1 stop13h 15m

£580

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 23/9

17:30-11:47

1 stop26h 17m

Seattle/Tacoma Intl

Wed 14/10

09:30-09:20

2 stops15h 50m

£585

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 15/9

09:40-21:36

2 stops19h 56m

Seattle/Tacoma Intl

Tue 6/10

12:00-15:20

2 stops19h 20m

£588

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 23/9

09:50-22:02

2 stops20h 12m

Seattle/Tacoma Intl

Wed 14/10

09:30-09:20

2 stops15h 50m

£592

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 23/9

09:50-11:47

1 stop33h 57m

Seattle/Tacoma Intl

Wed 14/10

17:45-16:55

2 stops15h 10m

£597

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 15/9

09:50-11:47

1 stop33h 57m

Seattle/Tacoma Intl

Tue 6/10

17:45-16:55

1 stop15h 10m

£598

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 and Aer Lingus are the most popular carriers 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.

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 many operators does momondo search for flights from Belfast to Washington?
There is 1 operator available for flights from Belfast to Washington as of June 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 £561	Free Cancellation	Rating 7.1 11,686 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.