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Cheap flights from Washington to Belfast City Airport from £444

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
21 Feb — 28 Feb1
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 22 January 2026.

Sat 7/318:50
SEA
-
BHD
1 stop16h 50m
British Airways
Wed 18/311:25
BHD
-
SEA
1 stop13h 30m
British Airways
Deal found 20/1£444
Sat 7/313:35
SEA
-
BHD
1 stop16h 40m
British Airways
Tue 17/308:45
BHD
-
SEA
1 stop16h 10m
British Airways
Deal found 22/1£445
Wed 4/317:45
PDX
-
BHD
1 stop14h 50m
British Airways
Sun 8/306:30
BHD
-
PDX
1 stop17h 25m
British Airways
Deal found 20/1£447
Wed 25/207:15
SEA
-
BHD
2 stops19h 00m
British Airways
Sun 1/320:25
BHD
-
SEA
1 stop28h 30m
British Airways
Deal found 21/1£451
Sat 12/911:32
SEA
-
BHD
2 stops16h 53m
British Airways
Tue 22/909:35
BHD
-
SEA
1 stop16h 50m
British Airways
Deal found 19/1£474
Fri 20/313:52
PDX
-
BHD
2 stops20h 23m
British Airways
Sun 29/313:10
BHD
-
PDX
2 stops43h 05m
British Airways
Deal found 21/1£894
Fri 20/310:32
PDX
-
BHD
2 stops20h 43m
Multiple Airlines
Fri 27/311:30
BHD
-
PDX
2 stops28h 53m
Multiple Airlines
Deal found 20/1£945
Fri 20/305:40
PDX
-
BHD
2 stops21h 50m
British Airways
Fri 27/308:45
BHD
-
PDX
2 stops20h 17m
British Airways
Deal found 20/1£1,004
Fri 20/314:25
PDX
-
BHD
1 stop23h 35m
KLM
Fri 27/306:30
BHD
-
PDX
1 stop12h 55m
KLM
Deal found 20/1£1,017

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 22 January 2026.

Round-trip from

£444

Popular in

December

Cheapest in

April

Average price

£708
British Airways
  • British Airways
  • 7/3-18/3
  • 2 total stops
  • 30h 20m total
  • Washington to Belfast
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£67 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£34 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
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 22 January 2026.
Use the filters below to find and compare flights from Washington to Belfast City Airport that are best for you.

Fly from

Washington

Fly to

Belfast City

Route

Depart

Return

Price

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

13:35-11:10

1 stop13h 35m

Belfast City

Tue 17/3

08:45-17:55

1 stop16h 10m

£444

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

18:50-19:40

1 stop16h 50m

Belfast City

Wed 18/3

11:25-17:55

1 stop13h 30m

£444

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 25/2

18:50-16:35

1 stop13h 45m

Belfast City

Sun 1/3

20:25-16:55

1 stop28h 30m

£447

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 4/3

17:45-14:15

1 stop12h 30m

Belfast City

Sun 8/3

20:25-16:55

1 stop27h 30m

£447

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 20/3

13:52-17:15

2 stops20h 23m

Belfast City

Sun 29/3

13:10-00:15

2 stops43h 05m

£894

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 20/3

10:32-14:15

2 stops20h 43m

Belfast City

Fri 27/3

11:30-09:23

2 stops28h 53m

£945

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 20/3

05:40-10:30

2 stops21h 50m

Belfast City

Fri 27/3

08:45-22:02

2 stops20h 17m

£1,004

Flights are sorted by cheapest return flights first.

Deals found on 20/1

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 can get you from State of Washington to Belfast City Airport in just under 13h 35m. Your travel time can differ by up to . The distance from State of Washington to Belfast City Airport is about 4472 mi.

  • 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
Bangor
Carrickfergus
Newcastle

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Alternative routes for Washington to Belfast City

See prices for flight routes from nearby airports that may be better suited for you.
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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