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Find cheap flights from Washington, D.C. to Belfast from $403

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Belfast departing on 9/28. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sat 6/1
Sat 6/8

Search hundreds of travel sites at once for deals on flights to Belfast

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Belfast, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Belfast, as well as popular online travel agencies
In the last 7 days travelers have searched 43,740,974 times on KAYAK, and here is why:

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Cheap flight deals from Washington, D.C. to Belfast (WAS-BHD)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to Belfast that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
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10:45 pm - 3:20 pmIAD-BHD
11h 35m1 stop
11:50 am - 8:30 pmBHD-IAD
13h 40m1 stop
$633American Airlines
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Tue, Aug 27 - Wed, Sep 11
10:45 pm - 3:20 pmIAD-BHD
11h 35m1 stop
6:50 am - 11:47 pmBHD-IAD
21h 57m2 stops
$642American Airlines
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Tue, Aug 27 - Wed, Sep 11
10:45 pm - 5:40 pmIAD-BHD
13h 55m1 stop
9:45 am - 3:35 pmBHD-IAD
10h 50m1 stop
$661Iberia
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Thu, Sep 26 - Tue, Oct 1
9:25 pm - 1:30 pmBWI-BHD
11h 05m1 stop
6:35 am - 7:40 pmBHD-BWI
18h 05m1 stop
$661British Airways
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Thu, Sep 26 - Tue, Oct 1
4:15 pm - 10:05 amIAD-BHD
12h 50m1 stop
9:55 am - 3:50 pmBHD-IAD
34h 55m1 stop
$683Lufthansa
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Sat, Oct 26 - Sun, Nov 3
6:00 pm - 2:50 pmIAD-BHD
15h 50m1 stop
3:35 pm - 7:25 pmBHD-IAD
32h 50m2 stops
$685Lufthansa
Find Deal
Thu, Sep 26 - Tue, Oct 1
5:25 pm - 4:50 pmIAD-BHD
18h 25m1 stop
5:20 pm - 4:00 pmBHD-IAD
27h 40m1 stop
$697Delta
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Mon, May 20 - Mon, May 27
1:24 pm - 4:50 pmIAD-BHD
22h 26m2 stops
5:20 pm - 4:00 pmBHD-IAD
27h 40m1 stop
$702Delta
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Mon, May 20 - Mon, May 27
11:30 am - 11:00 amDCA-BHD
18h 30m2 stops
6:35 am - 5:06 pmBHD-DCA
15h 31m2 stops
$709British Airways
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Thu, Sep 26 - Tue, Oct 1
8:45 pm - 5:40 pmIAD-BHD
15h 55m2 stops
6:35 am - 7:15 pmBHD-IAD
17h 40m2 stops
$1,017Iberia
Find Deal
Thu, May 30 - Thu, Jun 6

Flights from Washington, D.C. to Belfast - Travel Insights & Trends

Get data-powered insights and trends into flights from Washington, D.C. to Belfast to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Washington, D.C. to Belfast?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Washington, D.C. to Belfast, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Washington, D.C. to Belfast is January, where tickets cost $661 on average. On the other hand, the most expensive months are February and June, where the average cost of tickets is $4,381 and $1,174 respectively.

Which airlines provide the cheapest flights from Washington, D.C. to Belfast?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from Washington, D.C. to Belfast found on KAYAK was with Lufthansa for $403. American Airlines proposed a round-trip connection from $633 and Iberia from $661.

Good to know

Cheapest flight

$403
Flight from Washington Dulles Airport to Belfast City Airport

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

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Belfast based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Washington, D.C. to Belfast

  • What is the cheapest flight from Washington, D.C. to Belfast?

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Belfast was $403 for a one-way ticket and $633 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Belfast?

    Yes, you’ll need a passport to travel to Belfast from Washington, D.C..

  • Which airports will I be using when flying from Washington, D.C. to Belfast?

    Washington, D.C. is served by 2 major airports and there are 2 airports in Belfast. You will leave Washington, D.C. from one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You will be arriving in Belfast at one of these airports: Belfast Intl or Belfast City.

  • Which aircraft models fly most regularly from Washington, D.C. to Belfast?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington, D.C. to Belfast?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Washington, D.C. and Belfast, with oneworld being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Washington, D.C. to Belfast?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington, D.C. to Belfast.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Belfast?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast from Washington, D.C. is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington, D.C. to Belfast?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Belfast with an airline and back to Washington, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Belfast?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Belfast from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Book cheap flights from Washington, D.C. to Belfast

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Washington, D.C. to Belfast found on KAYAK in the last 72 hours.
9/28Sat
1 stopLufthansa
13h 05mIAD-BHD
$403
9/28Sat
2 stopsDelta
18h 55mIAD-BHD
$418
9/28Sat
2 stopsKLM
17h 25mBWI-BHD
$418
9/28Sat
2 stopsDelta
18h 50mDCA-BHD
$418
5/27Mon
3 stops
45h 20mIAD-BFS
$466
5/27Mon
3 stops
55h 55mIAD-BHD
$469
5/27Mon
2 stops
23h 25mIAD-BFS
$481
5/27Mon
3 stops
35h 19mBWI-BFS
$481
7/2Tue
1 stopBritish Airways
16h 25mIAD-BHD
$723
5/27Mon
2 stopsBritish Airways
13h 56mDCA-BHD
$883

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Last minute flights from Washington, D.C. to Belfast

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Washington, D.C. to Belfast that are departing in the next 10 days.
5/3Fri
multi-stopBritish Airways
16h 52mBWI-BHD
5/7Tue
multi-stopBritish Airways
28h 56mBHD-BWI
$681
5/3Fri
multi-stopDelta
18h 29mBWI-BHD
5/7Tue
multi-stopDelta
28h 51mBHD-BWI
$682
5/3Fri
multi-stopDelta
17h 44mDCA-BHD
5/7Tue
multi-stopDelta
32h 38mBHD-DCA
$682
5/3Fri
multi-stopDelta
18h 44mDCA-BHD
5/7Tue
multi-stopDelta
32h 38mBHD-DCA
$683
5/3Fri
multi-stopBritish Airways
16h 52mBWI-BHD
5/7Tue
multi-stopBritish Airways
28h 55mBHD-BWI
$792
5/3Fri
multi-stopBritish Airways
13h 10mBWI-BHD
5/7Tue
multi-stopBritish Airways
30h 10mBHD-BWI
$957
5/3Fri
multi-stopAmerican Airlines
23h 19mBWI-BHD
5/7Tue
multi-stopAmerican Airlines
32h 05mBHD-BWI
$1,132
5/3Fri
multi-stopBritish Airways
11h 25mBWI-BHD
5/7Tue
multi-stopBritish Airways
14h 40mBHD-BWI
$1,637

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