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.

£397 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

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

09:40 - 21:36

BHD

SEA

19h 56m

2 stops

20:20 - 17:35

SEA

BHD

13h 15m

1 stop

£576British Airways

Tue, 15 Sep - Tue, 6 Oct

09:40 - 21:36

BHD

SEA

19h 56m

2 stops

20:20 - 17:35

SEA

BHD

13h 15m

1 stop

£578British Airways

Tue, 15 Sep - Tue, 6 Oct

09:40 - 21:36

BHD

SEA

19h 56m

2 stops

12:00 - 15:20

SEA

BHD

19h 20m

2 stops

£583British Airways

Tue, 15 Sep - Tue, 6 Oct

09:40 - 21:36

BHD

SEA

19h 56m

2 stops

12:00 - 15:20

SEA

BHD

19h 20m

2 stops

£585British Airways

Tue, 15 Sep - Tue, 6 Oct

15:20 - 11:35

BHD

SEA

28h 15m

1 stop

17:40 - 18:45

SEA

BHD

17h 05m

2 stops

£592British Airways

Mon, 7 Sep - Mon, 28 Sep

15:20 - 11:35

BHD

SEA

28h 15m

1 stop

17:40 - 20:35

SEA

BHD

18h 55m

2 stops

£594British Airways

Mon, 7 Sep - Mon, 28 Sep

17:30 - 16:35

BHD

SEA

31h 05m

1 stop

17:45 - 16:55

SEA

BHD

15h 10m

1 stop

£596KLM

Tue, 15 Sep - Tue, 6 Oct

06:30 - 17:10

BHD

SEA

18h 40m

2 stops

17:40 - 20:35

SEA

BHD

18h 55m

2 stops

£597British Airways

Mon, 7 Sep - Mon, 28 Sep

06:30 - 17:10

BHD

SEA

18h 40m

2 stops

17:40 - 19:25

SEA

BHD

17h 45m

2 stops

£599British Airways

Mon, 7 Sep - Mon, 28 Sep

19:35 - 11:35

BHD

SEA

24h 00m

1 stop

13:30 - 12:55

SEA

BHD

15h 25m

1 stop

£602Multiple Airlines

Mon, 7 Sep - Mon, 28 Sep

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British Airways flights from Belfast to State of Washington

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

British Airways

16 Sept

BHD20:35Belfast City

23h 00m

1 stop

SEA11:35Seattle/Tacoma Intl

7 Oct

SEA11:34Seattle/Tacoma Intl

18h 01m

2 stops

BHD13:35Belfast City

£575

British Airways

15 Sept

BHD09:40Belfast City

19h 56m

2 stops

SEA21:36Seattle/Tacoma Intl

6 Oct

SEA20:20Seattle/Tacoma Intl

13h 15m

1 stop

BHD17:35Belfast City

£576

British Airways

15 Sept

BHD09:40Belfast City

19h 56m

2 stops

SEA21:36Seattle/Tacoma Intl

6 Oct

SEA20:20Seattle/Tacoma Intl

13h 15m

1 stop

BHD17:35Belfast City

£578

KLM flights from Belfast to State of Washington

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

KLM

15 Sept

BHD17:30Belfast City

31h 05m

1 stop

SEA16:35Seattle/Tacoma Intl

6 Oct

SEA17:45Seattle/Tacoma Intl

15h 10m

1 stop

BHD16:55Belfast City

£596

KLM

14 Sept

BHD17:30Belfast City

28h 30m

2 stops

SEA14:00Seattle/Tacoma Intl

20 Sept

SEA13:50Seattle/Tacoma Intl

19h 05m

1 stop

BHD16:55Belfast City

£4,678

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

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

£576

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

£578

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

£583

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

£585

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 7/9

15:20-11:35

1 stop28h 15m

Seattle/Tacoma Intl

Mon 28/9

17:40-18:45

2 stops17h 05m

£592

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 7/9

15:20-11:35

1 stop28h 15m

Seattle/Tacoma Intl

Mon 28/9

17:40-20:35

2 stops18h 55m

£594

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 15/9

17:30-16:35

1 stop31h 05m

Seattle/Tacoma Intl

Tue 6/10

17:45-16:55

1 stop15h 10m

£596

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 7/9

06:30-17:10

2 stops18h 40m

Seattle/Tacoma Intl

Mon 28/9

17:40-20:35

2 stops18h 55m

£597

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 7/9

06:30-17:10

2 stops18h 40m

Seattle/Tacoma Intl

Mon 28/9

17:40-19:25

2 stops17h 45m

£599

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 7/9

19:35-11:35

1 stop24h 00m

Seattle/Tacoma Intl

Mon 28/9

13:30-12:55

1 stop15h 25m

£602

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.

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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 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 £560	Free Cancellation	Rating 7.1 11,648 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.