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Cheap flights from Washington to Belfast City Airport from £271

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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
8 Jan — 15 Jan1
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 9 December 2025.

Sat 27/1213:40SEA - BHD
2 stops19h 10mMultiple Airlines
Sat 3/106:30BHD - SEA
1 stop13h 20mMultiple Airlines
Deal found 5/12£1,900
Sat 27/1215:05SEA - BHD
1 stop21h 55mDelta
Sat 3/106:30BHD - SEA
1 stop13h 20mDelta
Deal found 5/12£2,004
Sat 27/1207:07SEA - BHD
2 stops25h 38mBritish Airways
Sat 3/106:35BHD - SEA
2 stops23h 29mBritish Airways
Deal found 5/12£2,057

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 9 December 2025.

Round-trip from

£449

One-way from

£271

Popular in

December

Cheapest in

April

Average price

£1,188
British Airways
  • British Airways
  • 1/2-9/2
  • 2 total stops
  • 27h 25m total
  • Washington to Belfast
Search Deals
12/3
  • 12/3
  • 2 total stops
  • 18h 50m total
  • Washington to Belfast
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£71 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 December 2025
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 9 December 2025.
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

Fri 30/1

18:50-17:15

1 stop14h 25m

Belfast City

Tue 3/2

17:15-16:55

1 stop31h 40m

£467

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 11/2

17:45-16:35

1 stop14h 50m

Belfast City

Sun 15/2

20:25-15:55

1 stop27h 30m

£467

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Thu 8/1

07:00-10:20

2 stops19h 20m

Belfast City

Mon 19/1

09:15-20:28

2 stops19h 13m

£478

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Tue 17/3

17:40-18:40

2 stops18h 00m

Belfast City

Tue 31/3

09:35-20:49

2 stops19h 14m

£515

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Tue 17/3

07:05-16:50

2 stops26h 45m

Belfast City

Tue 31/3

17:30-11:10

1 stop25h 40m

£524

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 1/5

05:54-15:30

2 stops25h 36m

Belfast City

Fri 15/5

11:55-17:40

1 stop13h 45m

£532

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 4/3

13:23-14:15

2 stops16h 52m

Belfast City

Wed 11/3

09:15-17:55

1 stop15h 40m

£570

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 1/3

18:50-16:50

1 stop14h 00m

Belfast City

Wed 11/3

09:15-17:55

1 stop15h 40m

£574

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 9/3

19:50-18:35

1 stop15h 45m

Belfast City

Tue 17/3

08:45-17:55

1 stop16h 10m

£574

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 10/3

14:25-10:30

1 stop13h 05m

Belfast City

Wed 18/3

19:25-17:55

1 stop29h 30m

£574

Flights are sorted by cheapest return flights first.

Deals found on 6/12

Showing 1-10 of 27 results
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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 can get you from State of Washington to Belfast City Airport in just under 14h 25m. 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

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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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