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$457 Find cheap flights from Washington Dulles Airport to Belfast

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Belfast departing on 6/9. 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 6/29
Sat 7/6

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 42,686,544 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

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Filter your dealsChoose cabin class, free Wi-Fi and more.

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Cheap flight deals from Dulles Intl to Belfast (IAD-BHD)

 
These are the cheapest deals for flights from Dulles Intl to Belfast currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Dulles Intl to Belfast

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Dulles Intl to Belfast.

Recent one-way flight deals from Dulles Intl to Belfast

Only flying one-way? Below are some of the best one-way flight deals from Dulles Intl to Belfast found on KAYAK recently.

Recent last minute flight deals from Dulles Intl to Belfast

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from Dulles Intl to Belfast.

Recent direct flight deals from Dulles Intl to Belfast

The latest deals for direct flights from Dulles Intl to Belfast so you can sit back and relax without the need for a layover.

Cheap bus & train deals from Dulles Intl to Belfast

Find recent round-trip train or bus tickets from Dulles Intl to Belfast.

All round-trip flight deals to Belfast

The cheapest plane tickets to Belfast found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
10:45 pm - 5:25 pmIAD-BHD
13h 40m1 stop
11:50 am - 8:30 pmBHD-IAD
13h 40m1 stop
$565British Airways
Find Deal
Tue, Aug 27 - Wed, Sep 11
10:45 pm - 3:20 pmIAD-BHD
11h 35m1 stop
6:50 am - 10:10 pmBHD-IAD
20h 20m2 stops
$601British Airways
Find Deal
Tue, Aug 27 - Wed, Sep 11
1:17 pm - 10:35 amIAD-BHD
16h 18m2 stops
6:50 am - 10:10 pmBHD-IAD
20h 20m2 stops
$641American Airlines
Find Deal
Tue, Aug 27 - Wed, Sep 11
5:55 pm - 11:30 amIAD-BHD
12h 35m1 stop
7:40 pm - 8:30 pmBHD-IAD
29h 50m1 stop
$713British Airways
Find Deal
Sun, Aug 11 - Sun, Aug 18
5:25 pm - 4:50 pmIAD-BHD
18h 25m1 stop
5:20 pm - 3:57 pmBHD-IAD
27h 37m2 stops
$742Delta
Find Deal
Sat, Aug 10 - Sun, Aug 18
6:26 pm - 4:50 pmIAD-BHD
17h 24m2 stops
5:20 pm - 3:57 pmBHD-IAD
27h 37m2 stops
$746Delta
Find Deal
Sat, Aug 10 - Sun, Aug 18
6:50 pm - 7:15 pmIAD-BFS
19h 25m2 stops
9:25 pm - 5:40 pmBFS-IAD
25h 15m2 stops
$778
Find Deal
Fri, Oct 4 - Sat, Oct 12
8:24 am - 9:30 pmIAD-BFS
32h 06m2 stops
10:10 pm - 5:40 pmBFS-IAD
24h 30m2 stops
$845
Find Deal
Mon, Jun 10 - Sun, Jun 16
8:15 pm - 3:35 pmIAD-BHD
14h 20m2 stops
6:50 am - 8:35 pmBHD-IAD
18h 45m1 stop
$920American Airlines
Find Deal
Mon, Jun 10 - Sun, Jun 16
5:25 pm - 4:50 pmIAD-BHD
18h 25m1 stop
5:20 pm - 3:35 pmBHD-IAD
27h 15m1 stop
$1,133Virgin Atlantic
Find Deal
Thu, Jun 27 - Thu, Jul 4
7:15 am - 11:15 amIAD-BFS
47h 00m3 stops
$457
Find Deal
Sun, Jun 9
1:30 pm - 11:15 amIAD-BFS
40h 45m2 stops
$460
Find Deal
Sun, Jun 9
6:50 pm - 5:40 pmIAD-BHD
17h 50m2 stops
$490
Find Deal
Tue, Jul 2
7:15 am - 9:10 pmIAD-BHD
32h 55m3 stops
$510
Find Deal
Sun, Jun 9
1:30 pm - 9:10 pmIAD-BHD
26h 40m2 stops
$513
Find Deal
Sun, Jun 9
5:43 pm - 12:20 pmIAD-BHD
13h 37m2 stops
$590British Airways
Find Deal
Sat, Jun 8
10:45 pm - 5:25 pmIAD-BHD
13h 40m1 stop
$643American Airlines
Find Deal
Tue, Jul 2
1:13 pm - 10:35 amIAD-BHD
16h 22m2 stops
$646American Airlines
Find Deal
Tue, Jul 2
5:25 pm - 4:50 pmIAD-BHD
18h 25m1 stop
$1,482KLM
Find Deal
Sun, Jun 9
5:50 pm - 4:50 pmIAD-BHD
18h 00m1 stop
$1,532Air France
Find Deal
Sat, Jun 8

Flights from Dulles Intl to Belfast - Travel Insights & Trends

Get data-powered insights and trends into flights from Dulles Intl 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. Dulles Intl Airport to Belfast?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport to Belfast is September, where tickets cost $683 on average. On the other hand, the most expensive months are December and June, where the average cost of tickets is $1,183 and $977 respectively.

Which airlines provide the cheapest flights from Washington Dulles Airport 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 best return deals on flights connecting Washington Dulles Airport to Belfast were found on British Airways ($565) and American Airlines ($641). British Airways proposed the cheapest one-way flight at $590.

Good to know

Cheapest flight

$457
Flight from Washington Dulles Airport to Belfast Intl Airport

When to book flights from Dulles Intl to Belfast

Are your dates flexible? Find out the best times to travel from Dulles Intl 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 Washington Dulles Airport to Belfast flights

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Belfast was $457 for a one-way ticket and $565 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Belfast?

    Yes, you’ll need a passport to travel to Belfast from Washington Dulles Airport.

  • Which airports will I be using when flying from Washington Dulles Airport to Belfast?

    Washington Dulles Airport is served by only 1 airport and there are 2 airports in Belfast. You will leave Washington Dulles Airport from Washington, D.C. Dulles Intl and you will be arriving in Belfast at one of these airports: Belfast Intl or Belfast City.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Belfast?

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

  • Which airline alliances offer flights from Washington Dulles Airport to Belfast?

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

  • How does KAYAK find such low prices on flights from Washington Dulles Airport 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 Dulles Airport to Belfast.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast from Washington Dulles Airport 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 Dulles Airport 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 Dulles Airport with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport 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 Dulles Airport 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.
6/9Sun
3 stops
47h 00mIAD-BFS
$457
6/9Sun
2 stops
40h 45mIAD-BFS
$460
7/2Tue
2 stops
17h 50mIAD-BHD
$490
6/9Sun
3 stops
32h 55mIAD-BHD
$510
6/9Sun
2 stops
26h 40mIAD-BHD
$513
6/8Sat
2 stopsBritish Airways
13h 37mIAD-BHD
$590
7/2Tue
1 stopAmerican Airlines
13h 40mIAD-BHD
$643
7/2Tue
2 stopsAmerican Airlines
16h 22mIAD-BHD
$646
6/9Sun
1 stopKLM
18h 25mIAD-BHD
$1,482
6/8Sat
1 stopAir France
18h 00mIAD-BHD
$1,532

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Washington Dulles Airport - Belfast Flights

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Washington Dulles Airport (IAD)United States

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