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Cheap flights from Washington to Belfast from $299

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 10/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Washington to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
Virgin Atlantic Logo
7:00 am - 4:50 pm
PDX
-
BHD
25h 50m
2 stops
Virgin Atlantic Logo
9:40 am - 11:47 pm
BHD
-
PDX
22h 07m
2 stops
$330Virgin Atlantic
Sat, Nov 7 - Wed, Nov 11
British Airways Logo
8:20 pm - 5:30 pm
SEA
-
BHD
13h 10m
1 stop
British Airways Logo
6:30 am - 6:25 pm
BHD
-
SEA
19h 55m
1 stop
$943British Airways
Mon, Aug 10 - Thu, Aug 20
British Airways Logo
1:28 pm - 10:20 am
PDX
-
BHD
36h 52m
2 stops
British Airways Logo
9:15 am - 3:50 pm
BHD
-
PDX
14h 35m
1 stop
$946British Airways
Sat, Nov 7 - Wed, Nov 11
Multiple Airlines Logo
3:40 pm - 8:40 pm
SEA
-
BFS
21h 00m
2 stops
Multiple Airlines Logo
10:25 pm - 9:40 am
BFS
-
SEA
43h 15m
3 stops
$957Multiple Airlines
Sat, Sep 19 - Sat, Sep 26
Multiple Airlines Logo
8:20 pm - 8:35 pm
SEA
-
BHD
16h 15m
1 stop
Multiple Airlines Logo
9:35 am - 11:35 pm
BHD
-
SEA
22h 00m
2 stops
$975Multiple Airlines
Mon, Aug 10 - Thu, Aug 20
American Airlines Logo
12:50 pm - 3:30 pm
PDX
-
BHD
18h 40m
2 stops
American Airlines Logo
6:30 am - 6:00 pm
BHD
-
PDX
19h 30m
2 stops
$977American Airlines
Mon, Aug 10 - Wed, Aug 19
Delta Logo
1:05 pm - 9:20 am
PDX
-
BHD
12h 15m
1 stop
Delta Logo
9:50 am - 8:17 pm
BHD
-
PDX
18h 27m
2 stops
$1,038Delta
Sun, Aug 9 - Wed, Aug 19
Delta Logo
3:25 pm - 4:55 pm
PDX
-
BHD
17h 30m
2 stops
Delta Logo
9:50 am - 8:17 pm
BHD
-
PDX
18h 27m
2 stops
$1,079Delta
Sun, Aug 9 - Wed, Aug 19
KLM Logo
5:40 pm - 9:20 am
SEA
-
BHD
31h 40m
1 stop
KLM Logo
5:30 pm - 11:37 am
BHD
-
SEA
26h 07m
1 stop
$1,184KLM
Sat, Jul 25 - Sat, Aug 1
KLM Logo
5:40 pm - 9:20 am
SEA
-
BHD
31h 40m
1 stop
KLM Logo
9:50 am - 4:20 pm
BHD
-
SEA
14h 30m
1 stop
$1,224KLM
Wed, Jul 8 - Wed, Jul 22

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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
Aug 10
SEA8:20 pmSeattle/Tacoma Intl
13h 10m
1 stop
BHD5:30 pmBelfast City
Aug 20
BHD6:30 amBelfast City
19h 55m
1 stop
SEA6:25 pmSeattle/Tacoma Intl
$943
British Airways
Nov 7
PDX1:28 pmPortland
36h 52m
2 stops
BHD10:20 amBelfast City
Nov 11
BHD9:15 amBelfast City
14h 35m
1 stop
PDX3:50 pmPortland
$946
British Airways
Nov 7
PDX1:28 pmPortland
36h 52m
2 stops
BHD10:20 amBelfast City
Nov 11
BHD9:15 amBelfast City
14h 35m
1 stop
PDX3:50 pmPortland
$948

Aer Lingus flights from State of Washington to Belfast

Our best Aer Lingus deals on State of Washington to Belfast flight tickets
Aer Lingus
Jul 8
SEA7:10 pmSeattle/Tacoma Intl
16h 55m
2 stops
BHD8:05 pmBelfast City
Jul 22
BHD6:50 amBelfast City
18h 20m
2 stops
SEA5:10 pmSeattle/Tacoma Intl
$1,227
Aer Lingus
Aug 2
SEA7:10 pmSeattle/Tacoma Intl
30h 40m
2 stops
BHD9:50 amBelfast City
Aug 6
BHD9:50 amBelfast City
15h 20m
2 stops
SEA5:10 pmSeattle/Tacoma Intl
$1,239
Aer Lingus
Jul 12
SEA7:10 pmSeattle/Tacoma Intl
16h 55m
2 stops
BHD8:05 pmBelfast City
Jul 15
BHD6:50 amBelfast City
18h 20m
2 stops
SEA5:10 pmSeattle/Tacoma Intl
$1,253

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to Belfast that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated June 27, 2026.
Use the filters below to find and compare flights from Washington to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sat 11/7

7:00 am-4:50 pm

2 stops25h 50m

Belfast City

Wed 11/11

9:40 am-11:47 pm

2 stops22h 07m

$330

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 8/10

8:20 pm-5:30 pm

1 stop13h 10m

Belfast City

Thu 8/20

6:30 am-6:25 pm

1 stop19h 55m

$943

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sat 11/7

1:28 pm-10:20 am

2 stops36h 52m

Belfast City

Wed 11/11

9:15 am-3:50 pm

1 stop14h 35m

$946

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Sat 9/19

3:40 pm-8:40 pm

2 stops21h 00m

Belfast Intl

Sat 9/26

10:25 pm-9:40 am

3 stops43h 15m

$957

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 8/10

8:20 pm-8:35 pm

1 stop16h 15m

Belfast City

Thu 8/20

9:35 am-11:35 pm

2 stops22h 00m

$975

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 8/10

12:50 pm-3:30 pm

2 stops18h 40m

Belfast City

Wed 8/19

6:30 am-6:00 pm

2 stops19h 30m

$977
Quickest round-trip

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sun 8/9

1:05 pm-9:20 am

1 stop12h 15m

Belfast City

Wed 8/19

9:50 am-8:17 pm

2 stops18h 27m

$1,038

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sun 8/9

3:25 pm-4:55 pm

2 stops17h 30m

Belfast City

Wed 8/19

9:50 am-8:17 pm

2 stops18h 27m

$1,079

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/25

5:40 pm-9:20 am

1 stop31h 40m

Belfast City

Sat 8/1

5:30 pm-11:37 am

1 stop26h 07m

$1,184

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 7/8

5:40 pm-9:20 am

1 stop31h 40m

Belfast City

Wed 7/22

9:50 am-4:20 pm

1 stop14h 30m

$1,224

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Belfast from

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, Aer Lingus, and Delta are the most popular carriers 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

Fastest flight time

16h 15m

Direct flights

None
The fastest flight from State of Washington to Belfast takes 16h 15m
There are no direct flights from State of Washington to Belfast. There are no popular flight routes from State of Washington to Belfast.
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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 many operators does momondo search for flights from Washington to Belfast?

  • 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 AirwaysPriceFrom $807Free CancellationRating
6.7
8,071 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.

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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
Belfast Intl Airport
Belfast City Airport