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Cheap flights from Belfast Intl Airport to Washington, D.C. from $749

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Belfast Intl Airport to Washington, D.C. departing on 12/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Belfast Intl Airport to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:30 am - 6:40 pmBFS-BWI
17h 10m2 stops
Multiple Airlines Logo
7:40 pm - 9:50 pmBWI-BFS
21h 10m2 stops
$749Multiple Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9
Multiple Airlines Logo
4:30 pm - 6:40 pmBFS-BWI
31h 10m3 stops
Multiple Airlines Logo
7:40 pm - 1:25 pmBWI-BFS
12h 45m2 stops
$1,180Multiple Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9
Multiple Airlines Logo
1:55 pm - 6:40 pmBFS-BWI
33h 45m3 stops
Multiple Airlines Logo
10:40 am - 9:40 pmBWI-BFS
30h 00m3 stops
$1,518Multiple Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9

momondo Fare Finder

 
Customize your flight search to find flights from Belfast Intl Airport 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, momondo users made 832,500 searches. Data last updated October 19, 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

Fly to

Route

Depart

Return

Price

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Tue 12/2

6:30 am-6:40 pm

2 stops17h 10m

Baltimore/Washington

Tue 12/9

7:40 pm-9:50 pm

2 stops21h 10m

$749

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Tue 12/2

4:30 pm-6:40 pm

3 stops31h 10m

Baltimore/Washington

Tue 12/9

7:40 pm-1:25 pm

2 stops12h 45m

$1,180

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Tue 12/2

1:55 pm-6:40 pm

3 stops33h 45m

Baltimore/Washington

Tue 12/9

10:40 am-9:40 pm

3 stops30h 00m

$1,518

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Belfast Intl Airport to Washington, D.C.

Are you open to changing your travel dates? Check out the ideal times to fly from Belfast Intl Airport to Washington, D.C. according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Belfast Intl Airport to Washington, D.C. (BFS to WAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Belfast Intl Airport to Washington, D.C.

Direct flights

None
There are no direct flights from Belfast Intl Airport to Washington, D.C.. There are no popular flight routes from Belfast Intl Airport to Washington, D.C..
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  • How far is Belfast Intl to Washington, D.C. by plane?

    The straight-line distance from Belfast Intl to Washington, D.C. is 3361.5 mi. In terms of flight time, this usually takes a little over 17h 10m.

  • When did momondo last update prices for flights from Belfast Intl Airport to Washington, D.C.?

    Prices for flights from Belfast Intl Airport to Washington, D.C. are updated daily.

  • How old do you have to be to fly from Belfast Intl Airport to Washington, D.C.?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Belfast Intl Airport to Washington, D.C..

  • What documentation or ID do you need to fly to Washington, D.C.?

    The required travel and health documents for your Washington, D.C. trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • How do I get Price Alerts for flights from Belfast Intl Airport to Washington, D.C.?

    Price Alerts will notify you by email when the price for flights to Washington, D.C. from Belfast Intl Airport decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Belfast Intl Airport to Washington, D.C. with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Manassas
Reston
Fairfax
Gaithersburg
Glen Burnie
Springfield
Linthicum Heights

Why use momondo?

Why should I use momondo to find a flight deal from Belfast to Washington, D.C.?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Belfast to Washington, D.C.. momondo saves you time and could save you money on your trip.

Can I find flights from Belfast to Washington, D.C. with flexible booking policies on momondo?

All flight searches from Belfast to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Belfast to Washington, D.C.?

Once you have performed a search for Belfast to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Belfast to Washington, D.C. right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Belfast to Washington, D.C. flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Washington, D.C. trip

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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport