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Cheap flights from Washington to Belfast from $333

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 8/17. 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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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
8:20 pm - 6:45 pm
SEA
-
BHD
14h 25m
1 stop
British Airways Logo
12:45 pm - 6:25 pm
BHD
-
SEA
13h 40m
1 stop
$891British Airways
Mon, Oct 5 - Thu, Oct 22
British Airways Logo
8:20 pm - 7:25 pm
SEA
-
BHD
15h 05m
1 stop
British Airways Logo
9:35 am - 6:25 pm
BHD
-
SEA
16h 50m
1 stop
$892British Airways
Mon, Oct 5 - Thu, Oct 22
British Airways Logo
1:30 pm - 12:55 pm
SEA
-
BHD
15h 25m
1 stop
British Airways Logo
4:05 pm - 6:25 pm
BHD
-
SEA
34h 20m
1 stop
$909British Airways
Mon, Oct 19 - Wed, Oct 21
British Airways Logo
7:30 pm - 5:40 pm
PDX
-
BHD
14h 10m
1 stop
British Airways Logo
8:35 pm - 5:40 pm
BHD
-
PDX
29h 05m
1 stop
$909British Airways
Sun, Aug 23 - Wed, Aug 26
British Airways Logo
1:30 pm - 10:45 am
SEA
-
BHD
13h 15m
1 stop
British Airways Logo
7:30 pm - 11:35 am
BHD
-
SEA
24h 05m
1 stop
$910British Airways
Tue, Sep 8 - Tue, Sep 22
British Airways Logo
7:30 pm - 6:45 pm
PDX
-
BHD
15h 15m
1 stop
British Airways Logo
6:20 pm - 5:40 pm
BHD
-
PDX
31h 20m
1 stop
$910British Airways
Sun, Aug 23 - Wed, Aug 26
Multiple Airlines Logo
3:10 pm - 3:30 pm
SEA
-
BHD
16h 20m
2 stops
Multiple Airlines Logo
6:30 am - 6:25 pm
BHD
-
SEA
19h 55m
1 stop
$914Multiple Airlines
Mon, Oct 5 - Thu, Oct 22
Delta Logo
1:05 pm - 9:20 am
PDX
-
BHD
12h 15m
1 stop
Delta Logo
5:30 pm - 11:10 am
BHD
-
PDX
25h 40m
1 stop
$1,088Delta
Tue, Jul 14 - Wed, Jul 22
Delta Logo
3:00 pm - 4:55 pm
PDX
-
BHD
17h 55m
2 stops
Delta Logo
5:30 pm - 11:10 am
BHD
-
PDX
25h 40m
1 stop
$1,092Delta
Tue, Jul 14 - Wed, Jul 22
Delta Logo
1:05 pm - 4:55 pm
PDX
-
BHD
19h 50m
1 stop
Delta Logo
9:50 am - 11:36 am
BHD
-
PDX
33h 46m
2 stops
$1,105Delta
Mon, Jul 13 - Thu, Jul 23

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
Oct 5
SEA8:20 pmSeattle/Tacoma Intl
15h 05m
1 stop
BHD7:25 pmBelfast City
Oct 22
BHD6:30 amBelfast City
19h 55m
1 stop
SEA6:25 pmSeattle/Tacoma Intl
$891
British Airways
Oct 5
SEA8:20 pmSeattle/Tacoma Intl
15h 05m
1 stop
BHD7:25 pmBelfast City
Oct 22
BHD9:35 amBelfast City
16h 50m
1 stop
SEA6:25 pmSeattle/Tacoma Intl
$892
British Airways
Oct 19
SEA1:30 pmSeattle/Tacoma Intl
15h 25m
1 stop
BHD12:55 pmBelfast City
Oct 21
BHD4:05 pmBelfast City
34h 20m
1 stop
SEA6:25 pmSeattle/Tacoma Intl
$909

Delta flights from State of Washington to Belfast City Airport

Our best Delta deals on State of Washington to Belfast City Airport flight tickets
Delta
Sep 8
SEA7:20 amSeattle/Tacoma Intl
25h 35m
2 stops
BHD4:55 pmBelfast City
Sep 22
BHD5:30 pmBelfast City
26h 17m
1 stop
SEA11:47 amSeattle/Tacoma Intl
$933
Delta
Sep 8
SEA7:20 amSeattle/Tacoma Intl
25h 35m
2 stops
BHD4:55 pmBelfast City
Sep 24
BHD5:30 pmBelfast City
37h 56m
2 stops
SEA11:26 pmSeattle/Tacoma Intl
$943
Delta
Sep 7
SEA9:25 pmSeattle/Tacoma Intl
35h 30m
2 stops
BHD4:55 pmBelfast City
Sep 22
BHD5:30 pmBelfast City
26h 17m
1 stop
SEA11:47 amSeattle/Tacoma Intl
$944

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 May 9, 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

Cheapest round-trip
Quickest round-trip

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

8:20 pm-6:45 pm

1 stop14h 25m

Belfast City

Thu 10/22

12:45 pm-6:25 pm

1 stop13h 40m

$891

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

8:20 pm-7:25 pm

1 stop15h 05m

Belfast City

Thu 10/22

9:35 am-6:25 pm

1 stop16h 50m

$892

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/19

1:30 pm-12:55 pm

1 stop15h 25m

Belfast City

Wed 10/21

4:05 pm-6:25 pm

1 stop34h 20m

$909

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sun 8/23

7:30 pm-5:40 pm

1 stop14h 10m

Belfast City

Wed 8/26

8:35 pm-5:40 pm

1 stop29h 05m

$909

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 9/8

1:30 pm-10:45 am

1 stop13h 15m

Belfast City

Tue 9/22

7:30 pm-11:35 am

1 stop24h 05m

$910

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sun 8/23

7:30 pm-6:45 pm

1 stop15h 15m

Belfast City

Wed 8/26

6:20 pm-5:40 pm

1 stop31h 20m

$910

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

3:10 pm-3:30 pm

2 stops16h 20m

Belfast City

Thu 10/22

6:30 am-6:25 pm

1 stop19h 55m

$914

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Tue 7/14

1:05 pm-9:20 am

1 stop12h 15m

Belfast City

Wed 7/22

5:30 pm-11:10 am

1 stop25h 40m

$1,088

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Tue 7/14

3:00 pm-4:55 pm

2 stops17h 55m

Belfast City

Wed 7/22

5:30 pm-11:10 am

1 stop25h 40m

$1,092

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 7/13

1:05 pm-4:55 pm

1 stop19h 50m

Belfast City

Thu 7/23

9:50 am-11:36 am

2 stops33h 46m

$1,105

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 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 and American Airlines are the most popular carriers 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

14h 05m

Direct flights

None
The fastest flight from State of Washington to Belfast City Airport takes 14h 05m
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.
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Frequently asked questions about flying from Washington to Belfast City Airport

  • 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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