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Cheap flights from Washington to Belfast City Airport from £242

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 23/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
26 Jun — 3 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington to Belfast City

Enter your travel dates to find the best prices.

Cheapest flights from Washington to Belfast City
Explore the most affordable flight options available from Washington to Belfast City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 May 2026.

Mon 5/1020:20
SEA
-
BHD
1 stop14h 25m
British Airways
Thu 22/1020:35
BHD
-
SEA
1 stop23h 00m
British Airways
Deal found 22/5£659
Mon 31/820:20
SEA
-
BHD
1 stop16h 15m
British Airways
Mon 7/919:35
BHD
-
SEA
1 stop24h 00m
British Airways
Deal found 25/5£672
Mon 28/913:30
SEA
-
BHD
1 stop15h 25m
British Airways
Wed 30/920:35
BHD
-
SEA
1 stop23h 00m
British Airways
Deal found 22/5£673
Mon 5/1015:10
SEA
-
BHD
2 stops16h 20m
American Airlines
Thu 22/1014:20
BHD
-
SEA
1 stop29h 15m
American Airlines
Deal found 26/5£676
Sat 19/913:30
SEA
-
BHD
1 stop12h 35m
British Airways
Thu 24/906:30
BHD
-
SEA
1 stop13h 05m
British Airways
Deal found 23/5£695
Sat 19/913:41
SEA
-
BHD
2 stops17h 24m
American Airlines
Thu 24/906:30
BHD
-
SEA
1 stop13h 05m
American Airlines
Deal found 23/5£718
Sun 1/1117:45
PDX
-
BHD
1 stop16h 55m
British Airways
Sat 21/1118:00
BHD
-
PDX
1 stop29h 55m
British Airways
Deal found 23/5£727
Sun 1/1115:10
PDX
-
BHD
2 stops17h 40m
Delta
Sat 21/1117:20
BHD
-
PDX
1 stop26h 00m
Delta
Deal found 23/5£728
Sat 15/819:30
PDX
-
BHD
1 stop15h 50m
British Airways
Tue 25/818:20
BHD
-
PDX
1 stop31h 20m
British Airways
Deal found 24/5£730
Fri 25/913:30
SEA
-
BHD
1 stop20h 40m
British Airways
Sat 10/1007:05
BHD
-
SEA
1 stop12h 30m
British Airways
Deal found 25/5£738
Sat 15/807:39
PDX
-
BHD
2 stops18h 26m
Multiple Airlines
Tue 25/809:40
BHD
-
PDX
2 stops19h 56m
Multiple Airlines
Deal found 24/5£758
Tue 14/713:05
PDX
-
BHD
1 stop12h 15m
Delta
Thu 23/717:30
BHD
-
PDX
1 stop25h 40m
Delta
Deal found 24/5£806

Find flight deals from Washington to Belfast City

Keep the following information in mind while searching for Washington to Belfast City flight deals. Data was last updated 27 May 2026.

Round-trip from

£660

One-way from

£242
British Airways
  • British Airways
  • 5/10-22/10
  • 2 total stops
  • 27h 30m total
  • Washington to Belfast
Search Deals
23/9
  • 23/9
  • 3 total stops
  • 37h 35m total
  • Washington to Belfast
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Washington to Belfast City 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, Cheapflights users made 858,174 searches. Data last updated 27 May 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 return flight

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 28/9

13:30-12:55

1 stop15h 25m

Belfast City

Wed 30/9

20:35-11:35

1 stop23h 00m

£673

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sun 1/11

15:10-16:50

2 stops17h 40m

Belfast City

Sat 21/11

17:20-11:20

1 stop26h 00m

£728

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 25/9

13:30-18:10

1 stop20h 40m

Belfast City

Sat 10/10

07:05-11:35

1 stop12h 30m

£738

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sat 15/8

19:30-18:15

1 stop14h 45m

Belfast City

Tue 25/8

06:30-17:51

2 stops19h 21m

£745

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sun 1/11

13:28-16:50

2 stops19h 22m

Belfast City

Sat 21/11

06:35-19:15

2 stops20h 40m

£768

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 16/8

17:45-09:20

1 stop31h 35m

Belfast City

Sun 23/8

17:30-16:27

1 stop30h 57m

£769

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 6/9

15:50-18:45

2 stops18h 55m

Belfast City

Thu 10/9

20:35-17:10

2 stops28h 35m

£832

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 1/7

19:30-19:50

1 stop16h 20m

Belfast City

Thu 9/7

19:30-23:30

2 stops36h 00m

£920

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 1/7

13:05-09:20

1 stop12h 15m

Belfast City

Thu 9/7

17:30-11:10

1 stop25h 40m

£981

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Tue 11/8

14:08-16:55

2 stops18h 47m

Belfast City

Sat 15/8

17:30-11:10

1 stop25h 40m

£993

Flights are sorted by cheapest return flights first.

Deals found on 24/5

Showing 1-10 of 20 resultsSorted by cheapest first
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Best time to book a flight from Washington to Belfast City

Have a flexible travel schedule? Discover the best time to fly to Belfast City from Washington with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington to Belfast City Airport
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Washington to Belfast City. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from State of Washington to Belfast City Airport?

    British Airways, Delta, and KLM can get you from State of Washington to Belfast City Airport in just under 15h 25m. Your travel time can differ by up to 16h 10m. The distance from State of Washington to Belfast City Airport is about 4472 mi. Both multi-stop and direct flights can be found to your destination and back.

  • Can I find deals for flights from Washington to Belfast City that include hotel bookings?

    Yes. In addition to deals on Washington to Belfast City flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Washington to Belfast City?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Belfast City.

  • Can I find deals for business class flights from Washington to Belfast City?

    Yes. Cheapflights offers flight deals from Washington to Belfast City by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near Belfast City Airport?

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

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Cheapflights helps you search for flights from Washington to Belfast City via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Washington to Belfast City?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Washington to Belfast City for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Washington to Belfast City with no change fees?

Certainly. Search results for flights to Belfast City from Washington shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Washington to Belfast City become cheaper?

Yes, Cheapflights offers price alerts on Washington to Belfast City flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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