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Cheap flights from Washington to Belfast from $458

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 2/18. 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
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.
British Airways Logo
6:50 pm - 4:45 pm
SEA
-
BHD
13h 55m
1 stop
British Airways Logo
9:15 am - 5:55 pm
BHD
-
SEA
15h 40m
1 stop
$624British Airways
Sat, Mar 7 - Wed, Mar 18
British Airways Logo
6:50 pm - 7:40 pm
SEA
-
BHD
16h 50m
1 stop
British Airways Logo
11:25 am - 5:55 pm
BHD
-
SEA
13h 30m
1 stop
$625British Airways
Sat, Mar 7 - Wed, Mar 18
British Airways Logo
6:50 pm - 7:40 pm
SEA
-
BHD
16h 50m
1 stop
British Airways Logo
11:25 am - 5:55 pm
BHD
-
SEA
13h 30m
1 stop
$626British Airways
Sat, Mar 7 - Tue, Mar 17
British Airways Logo
6:50 pm - 7:40 pm
SEA
-
BHD
16h 50m
1 stop
British Airways Logo
6:35 am - 11:04 pm
BHD
-
SEA
23h 29m
2 stops
$630British Airways
Sat, Mar 7 - Tue, Mar 17
British Airways Logo
6:50 pm - 4:45 pm
SEA
-
BHD
13h 55m
1 stop
British Airways Logo
6:35 am - 11:04 pm
BHD
-
SEA
23h 29m
2 stops
$631British Airways
Sat, Mar 7 - Tue, Mar 17
British Airways Logo
6:50 pm - 7:40 pm
SEA
-
BHD
16h 50m
1 stop
British Airways Logo
11:25 am - 12:24 am
BHD
-
SEA
19h 59m
2 stops
$639British Airways
Sat, Mar 7 - Wed, Mar 18
KLM Logo
5:30 pm - 9:20 am
SEA
-
BHD
31h 50m
1 stop
KLM Logo
9:50 am - 11:45 am
BHD
-
SEA
33h 55m
1 stop
$664KLM
Mon, Apr 6 - Mon, Apr 20
American Airlines Logo
11:48 am - 2:15 pm
PDX
-
BHD
18h 27m
2 stops
American Airlines Logo
8:45 am - 8:44 pm
BHD
-
PDX
19h 59m
2 stops
$693American Airlines
Wed, Feb 25 - Tue, Mar 3
Multiple Airlines Logo
1:25 pm - 4:50 pm
PDX
-
BHD
19h 25m
1 stop
Multiple Airlines Logo
5:20 pm - 11:25 am
BHD
-
PDX
26h 05m
1 stop
$700Multiple Airlines
Wed, Feb 25 - Tue, Mar 3
Multiple Airlines Logo
10:05 am - 4:50 pm
PDX
-
BHD
22h 45m
2 stops
Multiple Airlines Logo
5:20 pm - 11:25 am
BHD
-
PDX
26h 05m
1 stop
$705Multiple Airlines
Wed, Feb 25 - Tue, Mar 3

British Airways flights from State of Washington to Belfast City Airport

Our best British Airways deals on State of Washington to Belfast City Airport flight tickets
British Airways
Mar 7
SEA6:50 pmSeattle/Tacoma Intl
13h 55m
1 stop
BHD4:45 pmBelfast City
Mar 18
BHD9:15 amBelfast City
15h 40m
1 stop
SEA5:55 pmSeattle/Tacoma Intl
$624
British Airways
Mar 7
SEA6:50 pmSeattle/Tacoma Intl
16h 50m
1 stop
BHD7:40 pmBelfast City
Mar 17
BHD8:45 amBelfast City
16h 10m
1 stop
SEA5:55 pmSeattle/Tacoma Intl
$625
British Airways
Mar 7
SEA1:35 pmSeattle/Tacoma Intl
16h 40m
1 stop
BHD2:15 pmBelfast City
Mar 17
BHD11:25 amBelfast City
13h 30m
1 stop
SEA5:55 pmSeattle/Tacoma Intl
$626

KLM flights from State of Washington to Belfast City Airport

Our best KLM deals on State of Washington to Belfast City Airport flight tickets
KLM
Apr 6
SEA5:30 pmSeattle/Tacoma Intl
31h 50m
1 stop
BHD9:20 amBelfast City
Apr 20
BHD9:50 amBelfast City
33h 55m
1 stop
SEA11:45 amSeattle/Tacoma Intl
$664
KLM
Apr 5
SEA4:55 pmSeattle/Tacoma Intl
16h 00m
2 stops
BHD4:55 pmBelfast City
Apr 20
BHD9:50 amBelfast City
33h 55m
1 stop
SEA11:45 amSeattle/Tacoma Intl
$794
KLM
Apr 5
SEA4:55 pmSeattle/Tacoma Intl
16h 00m
2 stops
BHD4:55 pmBelfast City
Apr 19
BHD9:50 amBelfast City
33h 55m
1 stop
SEA11:45 amSeattle/Tacoma Intl
$896

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to Belfast City Airport 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 February 7, 2026.
Use the filters below to find and compare flights from Washington to Belfast City Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

6:50 pm-4:45 pm

1 stop13h 55m

Belfast City

Wed 3/18

9:15 am-5:55 pm

1 stop15h 40m

$624

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

6:50 pm-7:40 pm

1 stop16h 50m

Belfast City

Wed 3/18

11:25 am-5:55 pm

1 stop13h 30m

$625

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

6:50 pm-7:40 pm

1 stop16h 50m

Belfast City

Tue 3/17

11:25 am-5:55 pm

1 stop13h 30m

$626

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

6:50 pm-7:40 pm

1 stop16h 50m

Belfast City

Tue 3/17

6:35 am-11:04 pm

2 stops23h 29m

$630

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

6:50 pm-4:45 pm

1 stop13h 55m

Belfast City

Tue 3/17

6:35 am-11:04 pm

2 stops23h 29m

$631

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

6:50 pm-7:40 pm

1 stop16h 50m

Belfast City

Wed 3/18

11:25 am-12:24 am

2 stops19h 59m

$639

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 4/6

5:30 pm-9:20 am

1 stop31h 50m

Belfast City

Mon 4/20

9:50 am-11:45 am

1 stop33h 55m

$664

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 2/25

11:48 am-2:15 pm

2 stops18h 27m

Belfast City

Tue 3/3

8:45 am-8:44 pm

2 stops19h 59m

$693

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 2/25

1:25 pm-4:50 pm

1 stop19h 25m

Belfast City

Tue 3/3

5:20 pm-11:25 am

1 stop26h 05m

$700

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 2/25

10:05 am-4:50 pm

2 stops22h 45m

Belfast City

Tue 3/3

5:20 pm-11:25 am

1 stop26h 05m

$705

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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 City Airport

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 City?

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

Cheap State of Washington to Belfast City Airport flight deals and tips

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

Fastest flight time

12h 35m

Direct flights

None
The fastest flight from State of Washington to Belfast City Airport takes 12h 35m
There are no direct flights from State of Washington to Belfast City Airport. There are no popular flight routes from State of Washington to Belfast City Airport.
Search flight deals

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

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

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

    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 City Airport.

  • What documentation or ID do you need to fly to Belfast City Airport?

    The necessary travel and health documents for your Belfast City Airport 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.

Traveling to a place near Belfast?

Book flights to Belfast if you plan to visit one of these locations
Newcastle
Bangor

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Belfast from Washington.

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?

momondo provides multiple filters to help you find the best flight to Belfast from Washington. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes momondo offers price alerts on flights to Belfast from Washington. 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.

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