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Cheap flights from Washington to Belfast City Airport from £246

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 27/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
18 Jul — 25 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 18 June 2026.

Mon 5/1020:20
SEA
-
BHD
1 stop16h 15m
British Airways
Thu 22/1020:35
BHD
-
SEA
1 stop23h 00m
British Airways
Deal found 16/6£663
Sun 20/920:20
SEA
-
BHD
1 stop14h 25m
British Airways
Thu 24/919:30
BHD
-
SEA
1 stop24h 05m
British Airways
Deal found 13/6£677
Mon 5/1015:10
SEA
-
BHD
2 stops16h 20m
American Airlines
Thu 22/1006:30
BHD
-
SEA
1 stop13h 05m
American Airlines
Deal found 15/6£679
Fri 25/920:20
SEA
-
BHD
1 stop13h 50m
British Airways
Thu 8/1020:35
BHD
-
SEA
1 stop23h 00m
British Airways
Deal found 13/6£698
Sat 7/1113:28
PDX
-
BHD
2 stops36h 52m
British Airways
Wed 11/1109:15
BHD
-
PDX
1 stop14h 35m
British Airways
Deal found 15/6£710
Sat 14/1113:28
PDX
-
BHD
2 stops36h 52m
British Airways
Fri 20/1108:45
BHD
-
PDX
2 stops22h 14m
British Airways
Deal found 13/6£715
Fri 25/913:38
SEA
-
BHD
2 stops17h 52m
Multiple Airlines
Thu 8/1019:30
BHD
-
SEA
1 stop24h 05m
Multiple Airlines
Deal found 13/6£718
Sun 9/820:20
SEA
-
BHD
1 stop14h 25m
British Airways
Mon 24/811:35
BHD
-
SEA
1 stop32h 00m
British Airways
Deal found 16/6£725
Fri 25/913:30
SEA
-
BHD
2 stops19h 25m
KLM
Thu 8/1009:50
BHD
-
SEA
2 stops20h 14m
KLM
Deal found 13/6£739
Sun 9/818:05
SEA
-
BHD
2 stops31h 15m
Delta
Mon 24/817:30
BHD
-
SEA
2 stops36h 30m
Delta
Deal found 16/6£743
Tue 14/719:30
PDX
-
BHD
1 stop16h 10m
Multiple Airlines
Wed 22/710:05
BHD
-
PDX
2 stops20h 46m
Multiple Airlines
Deal found 16/6£807
Tue 14/713:05
PDX
-
BHD
1 stop19h 50m
KLM
Wed 22/717:30
BHD
-
PDX
1 stop25h 40m
KLM
Deal found 16/6£810

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 18 June 2026.

Round-trip from

£663

One-way from

£246
British Airways
  • British Airways
  • 5/10-22/10
  • 2 total stops
  • 39h 15m total
  • Washington to Belfast
Search Deals
British Airways
  • British Airways
  • 27/9
  • 2 total stops
  • 19h 05m 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 18 June 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 5/10

20:20-20:35

1 stop16h 15m

Belfast City

Thu 22/10

20:35-11:35

1 stop23h 00m

£664

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 20/9

20:20-18:45

1 stop14h 25m

Belfast City

Thu 24/9

19:30-11:35

1 stop24h 05m

£677
Fastest return journey

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 5/10

15:10-15:30

2 stops16h 20m

Belfast City

Thu 22/10

06:30-11:35

1 stop13h 05m

£679

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 25/9

20:20-18:10

1 stop13h 50m

Belfast City

Thu 8/10

20:35-11:35

1 stop23h 00m

£698

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sat 7/11

13:28-10:20

2 stops36h 52m

Belfast City

Wed 11/11

17:40-23:30

2 stops37h 50m

£713

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 25/9

13:38-15:30

2 stops17h 52m

Belfast City

Thu 8/10

19:30-11:35

1 stop24h 05m

£718

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 9/8

20:20-18:45

1 stop14h 25m

Belfast City

Mon 24/8

11:35-11:35

1 stop32h 00m

£725

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 25/9

13:30-16:55

2 stops19h 25m

Belfast City

Thu 8/10

09:50-22:04

2 stops20h 14m

£739

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Tue 14/7

19:30-19:40

1 stop16h 10m

Belfast City

Wed 22/7

10:05-22:51

2 stops20h 46m

£807

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Tue 14/7

13:05-16:55

1 stop19h 50m

Belfast City

Wed 22/7

17:30-11:10

1 stop25h 40m

£810

Flights are sorted by cheapest return flights first.

Deals found on 15/6

Showing 1-10 of 25 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, American Airlines, and KLM can get you from State of Washington to Belfast City Airport in just under 16h 15m. Your travel time can differ by up to 3h 35m. 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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How does Cheapflights help users find flights from Washington to Belfast City?

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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