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 December 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.

£631 Cheap Flights from Belfast to Washington in 2025/26

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Find the cheapest flights from Belfast to Washington

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

11:25 - 16:55

BHD

SEA

13h 30m1 stop

14:04 - 14:15

SEA

BHD

40h 11m2 stops

£631British Airways

Wed, 28 Jan - Sun, 1 Feb

11:25 - 16:55

BHD

SEA

13h 30m1 stop

08:04 - 13:55

SEA

BHD

21h 51m2 stops

£657British Airways

Wed, 4 Feb - Sun, 8 Feb

12:25 - 16:55

BHD

SEA

12h 30m1 stop

18:50 - 16:50

SEA

BHD

14h 00m1 stop

£658British Airways

Wed, 4 Feb - Sun, 8 Feb

06:35 - 22:07

BHD

SEA

23h 32m2 stops

08:04 - 13:55

SEA

BHD

21h 51m2 stops

£665British Airways

Wed, 4 Feb - Sun, 8 Feb

06:35 - 22:07

BHD

SEA

23h 32m2 stops

08:04 - 10:20

SEA

BHD

18h 16m2 stops

£666British Airways

Wed, 4 Feb - Sun, 8 Feb

17:20 - 15:51

BHD

SEA

29h 31m2 stops

08:25 - 16:55

SEA

BHD

24h 30m2 stops

£1,089KLM

Sat, 28 Mar - Fri, 10 Apr

06:35 - 12:30

BHD

SEA

12h 55m1 stop

13:35 - 18:15

SEA

BHD

20h 40m1 stop

£1,131Finnair

Sat, 28 Mar - Fri, 10 Apr

17:20 - 15:51

BHD

SEA

29h 31m2 stops

14:05 - 16:55

SEA

BHD

18h 50m1 stop

£1,147KLM

Sat, 28 Mar - Fri, 10 Apr

KLM flights from Belfast to State of Washington

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

KLM

28 Mar

BHD17:20Belfast City

29h 31m

2 stops

SEA15:51Seattle/Tacoma Intl

10 Apr

SEA08:25Seattle/Tacoma Intl

24h 30m

2 stops

BHD16:55Belfast City

£1,089

Find similar

KLM

28 Mar

BHD17:20Belfast City

29h 31m

2 stops

SEA15:51Seattle/Tacoma Intl

10 Apr

SEA14:05Seattle/Tacoma Intl

18h 50m

1 stop

BHD16:55Belfast City

£1,147

Find similar

British Airways flights from Belfast to State of Washington

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

British Airways

28 Jan

BHD11:25Belfast City

13h 30m

1 stop

SEA16:55Seattle/Tacoma Intl

1 Feb

SEA14:04Seattle/Tacoma Intl

40h 11m

2 stops

BHD14:15Belfast City

£631

Find similar

British Airways

4 Feb

BHD11:25Belfast City

13h 30m

1 stop

SEA16:55Seattle/Tacoma Intl

8 Feb

SEA08:04Seattle/Tacoma Intl

21h 51m

2 stops

BHD13:55Belfast City

£657

Find similar

British Airways

4 Feb

BHD12:25Belfast City

12h 30m

1 stop

SEA16:55Seattle/Tacoma Intl

8 Feb

SEA18:50Seattle/Tacoma Intl

14h 00m

1 stop

BHD16:50Belfast City

£658

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 28/1

11:25-16:55

1 stop13h 30m

Seattle/Tacoma Intl

Sun 1/2

14:04-14:15

2 stops40h 11m

£631

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/2

11:25-16:55

1 stop13h 30m

Seattle/Tacoma Intl

Sun 8/2

08:04-13:55

2 stops21h 51m

£657

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/2

12:25-16:55

1 stop12h 30m

Seattle/Tacoma Intl

Sun 8/2

18:50-16:50

1 stop14h 00m

£658

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/2

06:35-22:07

2 stops23h 32m

Seattle/Tacoma Intl

Sun 8/2

08:04-13:55

2 stops21h 51m

£665

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/2

06:35-22:07

2 stops23h 32m

Seattle/Tacoma Intl

Sun 8/2

08:04-10:20

2 stops18h 16m

£666

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 28/3

17:20-15:51

2 stops29h 31m

Seattle/Tacoma Intl

Fri 10/4

08:25-16:55

2 stops24h 30m

£1,089

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 28/3

06:35-12:30

1 stop12h 55m

Seattle/Tacoma Intl

Fri 10/4

13:35-18:15

1 stop20h 40m

£1,131

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 28/3

17:20-15:51

2 stops29h 31m

Seattle/Tacoma Intl

Fri 10/4

14:05-16:55

1 stop18h 50m

£1,147

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 29/12

21:50-11:45

3 stops45h 55m

£779

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 29/12

14:00-11:30

2 stops29h 30m

£913

Flights are sorted by cheapest return flights first.

Showing 1-10 of 17 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	12h 30m
Direct flights	None

The fastest flight from Belfast to State of Washington takes 12h 30m

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 December 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 £442	Free Cancellation	Rating 6.7 7,573 reviews		Search British Airways flights
American Airlines	PriceFrom £564	Free Cancellation	Rating 7.2 11,047 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.