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 August 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.

£312 Cheap Flights from Belfast to Washington in 2025

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Find the cheapest flights from Belfast to Washington

Round-trip

One-way

Cheap return flights

06:40 - 11:35BHD-SEA

12h 55m1 stop

13:30 - 11:55SEA-BHD

14h 25m1 stop

£564British Airways

Find Deal

Mon, 15 Sep - Wed, 24 Sep

06:40 - 11:35BHD-SEA

12h 55m1 stop

13:30 - 13:30SEA-BHD

16h 00m1 stop

£565British Airways

Find Deal

Mon, 15 Sep - Wed, 24 Sep

06:40 - 11:35BHD-SEA

12h 55m1 stop

13:30 - 11:55SEA-BHD

14h 25m1 stop

£567British Airways

Find Deal

Mon, 15 Sep - Wed, 24 Sep

09:50 - 20:09BHD-SEA

18h 19m2 stops

13:30 - 11:55SEA-BHD

14h 25m1 stop

£581British Airways

Find Deal

Mon, 15 Sep - Wed, 24 Sep

09:50 - 20:09BHD-SEA

18h 19m2 stops

10:11 - 11:55SEA-BHD

17h 44m2 stops

£641British Airways

Find Deal

Mon, 15 Sep - Wed, 24 Sep

13:50 - 20:09BHD-SEA

38h 19m2 stops

23:05 - 11:10SEA-BHD

28h 05m2 stops

£656Finnair

Find Deal

Mon, 15 Sep - Wed, 24 Sep

13:50 - 20:09BHD-SEA

38h 19m2 stops

13:30 - 13:30SEA-BHD

16h 00m1 stop

£659Finnair

Find Deal

Mon, 15 Sep - Wed, 24 Sep

17:55 - 17:50BHD-SEA

31h 55m2 stops

19:35 - 19:55SEA-BHD

16h 20m2 stops

£662Aer Lingus

Find Deal

Mon, 15 Sep - Wed, 24 Sep

06:40 - 11:35BHD-SEA

12h 55m1 stop

07:48 - 11:55SEA-BHD

20h 07m2 stops

£730

Find Deal

Mon, 15 Sep - Wed, 24 Sep

British Airways flights from Belfast to State of Washington

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

British Airways

15 Sept

BHD06:40Belfast City

12h 55m

1 stop

SEA11:35Seattle/Tacoma Intl

24 Sept

SEA13:30Seattle/Tacoma Intl

14h 25m

1 stop

BHD11:55Belfast City

£564

Find similar

British Airways

15 Sept

BHD06:40Belfast City

12h 55m

1 stop

SEA11:35Seattle/Tacoma Intl

24 Sept

SEA13:30Seattle/Tacoma Intl

16h 00m

1 stop

BHD13:30Belfast City

£565

Find similar

British Airways

15 Sept

BHD06:40Belfast City

12h 55m

1 stop

SEA11:35Seattle/Tacoma Intl

24 Sept

SEA13:30Seattle/Tacoma Intl

14h 25m

1 stop

BHD11:55Belfast City

£567

Find similar

Finnair flights from Belfast to State of Washington

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

Finnair

15 Sept

BHD13:50Belfast City

38h 19m

2 stops

SEA20:09Seattle/Tacoma Intl

24 Sept

SEA23:05Seattle/Tacoma Intl

28h 05m

2 stops

BHD11:10Belfast City

£656

Find similar

Finnair

15 Sept

BHD13:50Belfast City

38h 19m

2 stops

SEA20:09Seattle/Tacoma Intl

24 Sept

SEA13:30Seattle/Tacoma Intl

16h 00m

1 stop

BHD13:30Belfast City

£659

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

06:40-11:35

1 stop12h 55m

Seattle/Tacoma Intl

Wed 24/9

13:30-11:55

1 stop14h 25m

£564

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

06:40-11:35

1 stop12h 55m

Seattle/Tacoma Intl

Wed 24/9

13:30-13:30

1 stop16h 00m

£565

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

06:40-11:35

1 stop12h 55m

Seattle/Tacoma Intl

Wed 24/9

13:30-11:55

1 stop14h 25m

£567

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

09:50-20:09

2 stops18h 19m

Seattle/Tacoma Intl

Wed 24/9

13:30-11:55

1 stop14h 25m

£581

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

09:50-20:09

2 stops18h 19m

Seattle/Tacoma Intl

Wed 24/9

10:11-11:55

2 stops17h 44m

£641

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

13:50-20:09

2 stops38h 19m

Seattle/Tacoma Intl

Wed 24/9

23:05-11:10

2 stops28h 05m

£656

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

13:50-20:09

2 stops38h 19m

Seattle/Tacoma Intl

Wed 24/9

13:30-13:30

1 stop16h 00m

£659

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

17:55-17:50

2 stops31h 55m

Seattle/Tacoma Intl

Wed 24/9

19:35-19:55

2 stops16h 20m

£662

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

06:40-11:35

1 stop12h 55m

Seattle/Tacoma Intl

Wed 24/9

07:48-11:55

2 stops20h 07m

£730

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 4/9

20:15-20:39

3 stops56h 24m

£312

Flights are sorted by cheapest return flights first.

Showing 1-10 of 19 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, KLM, and Virgin Atlantic 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

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 August 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 £437	Free Cancellation	Rating 6.7 7,310 reviews		Search British Airways flights
American Airlines	PriceFrom £557	Free Cancellation	Rating 7.2 10,000 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.