When did momondo last update prices for flights from Washington to Belfast?

Prices for flights from Washington to Belfast are refreshed on a daily basis.

How old do you have to be to fly from Washington to Belfast?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to Belfast.

What documentation or ID do you need to fly to Belfast?

The necessary travel and health documents for your Belfast 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.

$353 Cheap Flights from Washington to Belfast in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington to Belfast

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:35 pm - 7:00 pmSEA Seattle/Tacoma Intl-BHD Belfast City

20h 25m2 stops Reykjavik Keflavik Intl London Heathrow

2:20 pm - 5:00 pmBHD Belfast City-SEA Seattle/Tacoma Intl

34h 40m2 stops London Gatwick Reykjavik Keflavik Intl

$850Multiple Airlines

Wed, Jan 20 - Wed, Jan 27

6:45 pm - 4:50 pmSEA Seattle/Tacoma Intl-BHD Belfast City

14h 05m1 stop London Heathrow

4:55 pm - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

31h 55m1 stop London Heathrow

$901British Airways

Sun, Mar 7 - Tue, Mar 9

8:20 pm - 5:40 pmSEA Seattle/Tacoma Intl-BHD Belfast City

13h 20m1 stop London Heathrow

6:30 am - 6:25 pmBHD Belfast City-SEA Seattle/Tacoma Intl

19h 55m1 stop London Heathrow

$905British Airways

Sun, Apr 25 - Wed, Apr 28

8:20 pm - 5:40 pmSEA Seattle/Tacoma Intl-BHD Belfast City

13h 20m1 stop London Heathrow

6:30 am - 6:25 pmBHD Belfast City-SEA Seattle/Tacoma Intl

19h 55m1 stop London Heathrow

$906British Airways

Sun, Apr 25 - Wed, Apr 28

6:45 pm - 7:05 pmSEA Seattle/Tacoma Intl-BHD Belfast City

16h 20m1 stop London Heathrow

9:15 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

15h 35m1 stop London Heathrow

$958British Airways

Wed, Jan 20 - Wed, Jan 27

2:35 pm - 7:00 pmSEA Seattle/Tacoma Intl-BHD Belfast City

20h 25m2 stops Reykjavik Keflavik Intl London Heathrow

7:25 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

17h 25m1 stop London Gatwick

$961Multiple Airlines

Wed, Jan 20 - Wed, Jan 27

6:45 pm - 5:25 pmSEA Seattle/Tacoma Intl-BHD Belfast City

14h 40m1 stop London Heathrow

11:45 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 05m1 stop London Heathrow

$1,059British Airways

Fri, Jan 1 - Sat, Jan 16

6:45 pm - 5:25 pmSEA Seattle/Tacoma Intl-BHD Belfast City

14h 40m1 stop London Heathrow

11:45 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 05m1 stop London Heathrow

$1,074Multiple Airlines

Fri, Jan 1 - Sat, Jan 16

6:45 pm - 7:10 pmSEA Seattle/Tacoma Intl-BHD Belfast City

16h 25m1 stop London Heathrow

6:35 am - 8:13 pmBHD Belfast City-SEA Seattle/Tacoma Intl

21h 38m2 stops London Heathrow Chicago O'Hare Intl

$1,089British Airways

Fri, Jan 1 - Sat, Jan 16

10:47 am - 2:05 pmSEA Seattle/Tacoma Intl-BHD Belfast City

19h 18m2 stops Chicago O'Hare Intl London Heathrow

6:35 am - 8:13 pmBHD Belfast City-SEA Seattle/Tacoma Intl

21h 38m2 stops London Heathrow Chicago O'Hare Intl

$1,101American Airlines

Fri, Jan 1 - Sat, Jan 16

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British Airways flights from State of Washington to Belfast

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

British Airways

Mar 7

SEA6:45 pmSeattle/Tacoma Intl

14h 05m

1 stop

BHD4:50 pmBelfast City

Mar 9

BHD4:55 pmBelfast City

31h 55m

1 stop

SEA4:50 pmSeattle/Tacoma Intl

$901

British Airways

Apr 25

SEA8:20 pmSeattle/Tacoma Intl

13h 20m

1 stop

BHD5:40 pmBelfast City

Apr 28

BHD6:30 amBelfast City

19h 55m

1 stop

SEA6:25 pmSeattle/Tacoma Intl

$905

British Airways

Apr 25

SEA8:20 pmSeattle/Tacoma Intl

13h 20m

1 stop

BHD5:40 pmBelfast City

Apr 28

BHD6:30 amBelfast City

19h 55m

1 stop

SEA6:25 pmSeattle/Tacoma Intl

$906

American Airlines flights from State of Washington to Belfast

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

American Airlines

Jan 1

SEA10:47 amSeattle/Tacoma Intl

19h 18m

2 stops

BHD2:05 pmBelfast City

Jan 16

BHD6:35 amBelfast City

21h 38m

2 stops

SEA8:13 pmSeattle/Tacoma Intl

$1,101

American Airlines

Nov 30

SEA10:33 amSeattle/Tacoma Intl

19h 42m

2 stops

BHD2:15 pmBelfast City

Dec 13

BHD12:00 pmBelfast City

20h 47m

2 stops

SEA12:47 amSeattle/Tacoma Intl

$1,193

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Wed 1/20

2:35 pm-7:00 pm

2 stops20h 25m

Belfast City

Wed 1/27

2:20 pm-5:00 pm

2 stops34h 40m

$850

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sun 3/7

6:45 pm-4:50 pm

1 stop14h 05m

Belfast City

Tue 3/9

4:55 pm-4:50 pm

1 stop31h 55m

$901

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sun 4/25

8:20 pm-5:40 pm

1 stop13h 20m

Belfast City

Wed 4/28

6:30 am-6:25 pm

1 stop19h 55m

$905

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sun 4/25

8:20 pm-5:40 pm

1 stop13h 20m

Belfast City

Wed 4/28

6:30 am-6:25 pm

1 stop19h 55m

$906

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Wed 1/20

6:45 pm-7:05 pm

1 stop16h 20m

Belfast City

Wed 1/27

9:15 am-4:50 pm

1 stop15h 35m

$958

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Wed 1/20

2:35 pm-7:00 pm

2 stops20h 25m

Belfast City

Wed 1/27

7:25 am-4:50 pm

1 stop17h 25m

$961

Quickest round-trip

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Fri 1/1

6:45 pm-5:25 pm

1 stop14h 40m

Belfast City

Sat 1/16

11:45 am-4:50 pm

1 stop13h 05m

$1,059

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Fri 1/1

6:45 pm-5:25 pm

1 stop14h 40m

Belfast City

Sat 1/16

11:45 am-4:50 pm

1 stop13h 05m

$1,074

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Fri 1/1

6:45 pm-7:10 pm

1 stop16h 25m

Belfast City

Sat 1/16

6:35 am-8:13 pm

2 stops21h 38m

$1,089

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Fri 1/1

10:47 am-2:05 pm

2 stops19h 18m

Belfast City

Sat 1/16

6:35 am-8:13 pm

2 stops21h 38m

$1,101

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from State of Washington to Belfast

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 Washington to Belfast?

British Airways is the most popular carrier operating from Washington to Belfast

Cheap State of Washington to Belfast flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Belfast

Best Price Found	$353
Fastest flight time	13h 20m
Direct flights	None

The best one-way flight to Belfast from State of Washington in the past 72 hours is $353. The best round-trip flight deal from State of Washington to Belfast found on momondo in the last 72 hours is $850.

The fastest flight from State of Washington to Belfast takes 13h 20m

There are no direct flights from State of Washington to Belfast. There are no popular flight routes from State of Washington to Belfast.

Search flight deals

Frequently asked questions about flying from Washington to Belfast

When did momondo last update prices for flights from Washington to Belfast?
Prices for flights from Washington to Belfast are refreshed on a daily basis.
How old do you have to be to fly from Washington to Belfast?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to Belfast.
What documentation or ID do you need to fly to Belfast?
The necessary travel and health documents for your Belfast 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 State of Washington to Belfast

Compare and see reviews for airlines that fly from State of Washington to Belfast with momondo

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom $804	Free Cancellation	Rating 6.7 8,286 reviews		Search British Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Belfast?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington to Belfast. momondo saves you time and could save you money on your trip.

Can I find flights from Washington to Belfast with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Washington to Belfast flights to just show those with flexible booking policies.

How can momondo help me find flights from Washington to Belfast?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Belfast from Washington.

I’m not ready to book a flight from Washington to Belfast right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Belfast, momondo offers a useful price alert feature which will track prices for flights to Belfast from Washington and alert you when they change.

An easier way to manage your Belfast trip

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Cheap flights from Washington to Belfast from $353

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Belfast departing on 11/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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British Airways flights from State of Washington to Belfast

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

American Airlines flights from State of Washington to Belfast

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

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How to get the cheapest flight ticket from State of Washington to Belfast

What is the cheapest airline that flies from Washington to Belfast?

Cheap State of Washington to Belfast flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Washington to Belfast

Best airlines flying from State of Washington to Belfast

Compare and see reviews for airlines that fly from State of Washington to Belfast with momondo

Why use momondo?

An easier way to manage your Belfast trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United Kingdom

Fly into one of these airports located in Belfast

Airports listed have a maximum distance of 12.2 mi from Belfast

Fly your favorite airline to Belfast

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Washington

According to popular flight searches on momondo this year

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According to popular flight searches on momondo this year