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Cheap flights from Belfast Intl Airport to Washington, D.C. from £339

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 22/11. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — WAS
18 Jul — 25 Jul1
1 adult

Find flight deals from Belfast Intl to Washington, D.C.

One-way flights from Belfast Intl to Washington, D.C.
Search for one-way flight options from Belfast Intl to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated 13 July 2025.

Sat 22/1122:25BFS - BWI
3 stops40h 30mMultiple Airlines
Deal found 11/7£339
Sat 22/1122:45BFS - IAD
2 stops28h 39mMultiple Airlines
Deal found 11/7£381
Sat 22/1108:10BFS - DCA
2 stops19h 25mMultiple Airlines
Deal found 11/7£414

Cheapflights Fare Finder

Customise your flight search to find flights from Belfast Intl to Washington, D.C. 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 13 July 2025.
Use the filters below to find and compare flights from Belfast Intl Airport to Washington, D.C. that are best for you.

Fly from

Belfast Intl

Fly to

Washington, D.C.

Route

Depart

Return

Price

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Sat 22/11

22:25-09:55

3 stops40h 30m

£339

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Sat 22/11

22:45-22:24

2 stops28h 39m

£381

BelfastWashington, D.C.

BFS - DCA

BFSDCA

Belfast Intl

Sat 22/11

08:10-22:35

2 stops19h 25m

£414

Flights are sorted by cheapest return flights first.

Deals found on 11/7

Best time to book a flight from Belfast Intl to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Belfast Intl 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 Belfast Intl Airport to Washington, D.C.
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Related info for your journey

Find useful and relevant information for your journey from Belfast Intl to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What are the most popular routes from Belfast Intl Airport to Washington, D.C.?

  • Can I find deals for flights from Belfast Intl to Washington, D.C. that include hotel bookings?

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

  • How can I find direct flights from Belfast Intl to Washington, D.C.?

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

  • Can I find deals for business class flights from Belfast Intl to Washington, D.C.?

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

  • What is the cheapest month to book a flight from Belfast Intl Airport to Washington, D.C.?

    Currently, January is the cheapest month in which you can book a flight from Belfast Intl Airport to Washington, D.C. (average of £599). Flying from Belfast Intl Airport to Washington, D.C. in July is currently the most expensive (average of £947). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Belfast Intl Airport?

Book flights to Belfast Intl Airport if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Arlington
Woodbridge
College Park
Laurel
Tysons

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Why should you use Cheapflights to find cheap flight tickets from Belfast Intl to Washington, D.C.?

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Can Cheapflights find flights from Belfast Intl to Washington, D.C. with no change fees?

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Can Cheapflights notify me if prices for flights from Belfast Intl to Washington, D.C. become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Washington, D.C. from Belfast Intl today and book when prices fit your budget.

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