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Cheap flights from Washington to Belfast City Airport from £160

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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
21 Jan — 28 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.

Best flights from Washington to Belfast City
Discover carefully curated flight deals from Washington to Belfast City that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 22 December 2025.

Sat 7/315:05SEA - BHD
1 stop17h 45mMultiple Airlines
Wed 18/317:20BHD - SEA
1 stop26h 15mMultiple Airlines
Deal found 20/12£483
Sat 7/315:05SEA - BHD
1 stop21h 55mDelta
Tue 17/306:30BHD - SEA
1 stop13h 05mDelta
Deal found 21/12£483
Wed 1/417:30SEA - BHD
1 stop15h 25mKLM
Wed 8/417:30BHD - SEA
1 stop31h 00mKLM
Deal found 21/12£493
Wed 14/117:45PDX - BHD
1 stop12h 30mBritish Airways
Wed 21/106:35BHD - PDX
1 stop17h 20mBritish Airways
Deal found 21/12£586
Sat 7/315:05SEA - BHD
1 stop21h 55mDelta
Wed 18/306:30BHD - SEA
2 stops20h 18mDelta
Deal found 21/12£490
Mon 23/306:44SEA - BHD
2 stops20h 56mMultiple Airlines
Fri 27/306:45BHD - SEA
1 stop12h 45mMultiple Airlines
Deal found 21/12£505
Wed 4/213:38PDX - BHD
2 stops21h 32mBritish Airways
Sun 8/217:35BHD - PDX
1 stop30h 20mBritish Airways
Deal found 19/12£735
Fri 6/210:30PDX - BHD
2 stops16h 00mBritish Airways
Sun 8/215:10BHD - PDX
1 stop32h 45mBritish Airways
Deal found 19/12£773

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 December 2025.

Round-trip from

£483

Popular in

December

Cheapest in

April

Average price

£1,183
Delta
  • Delta
  • 7/3-17/3
  • 2 total stops
  • 35h 00m 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 (£33 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 22 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

Sat 7/3

15:05-16:50

1 stop17h 45m

Belfast City

Wed 18/3

17:20-12:35

1 stop26h 15m

£483

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

15:05-21:00

1 stop21h 55m

Belfast City

Tue 17/3

06:30-12:35

1 stop13h 05m

£483

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

15:05-21:00

1 stop21h 55m

Belfast City

Wed 18/3

06:30-19:48

2 stops20h 18m

£490

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 1/4

17:30-16:55

1 stop15h 25m

Belfast City

Wed 8/4

17:30-16:30

1 stop31h 00m

£493

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 23/3

06:44-10:40

2 stops20h 56m

Belfast City

Fri 27/3

06:45-12:30

1 stop12h 45m

£505

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 14/1

17:45-14:15

1 stop12h 30m

Belfast City

Wed 21/1

06:35-15:55

1 stop17h 20m

£586

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 4/2

13:38-19:10

2 stops21h 32m

Belfast City

Sun 8/2

17:35-15:55

1 stop30h 20m

£735

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 6/2

10:30-10:30

2 stops16h 00m

Belfast City

Sun 8/2

15:10-15:55

1 stop32h 45m

£773

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 12/4

20:20-20:45

1 stop16h 25m

£160

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 12/4

07:00-10:30

2 stops19h 30m

£172

Flights are sorted by cheapest return flights first.

Deals found on 22/12

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?

    Delta and British Airways can get you from State of Washington to Belfast City Airport in just under 12h 30m. Your travel time can differ by up to 9h 25m. The distance from State of Washington to Belfast City Airport is about 4585 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
Bangor
Newcastle
Carrickfergus

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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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