Find flights
Deals
Insights
When to book
FAQs & Tips

$402 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 6/23. 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 6/15
Sat 6/22

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 42,211,976 times on KAYAK, and here is why:

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

Track pricesNot ready to book? Create a price alert for when prices drop.

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

Bundle and saveSave money when you bundle your flight + hotel.

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
10:50 pm - 5:35 pmIAD-BHD
13h 45m1 stop
6:55 pm - 8:35 pmBHD-IAD
30h 40m1 stop
$595British Airways
Find Deal
Sun, Oct 13 - Sat, Oct 19
10:45 pm - 5:40 pmIAD-BHD
13h 55m1 stop
1:50 pm - 8:30 pmBHD-IAD
11h 40m1 stop
$606British Airways
Find Deal
Wed, Aug 21 - Mon, Sep 2
10:45 pm - 3:20 pmIAD-BHD
11h 35m1 stop
6:50 am - 11:47 pmBHD-IAD
21h 57m2 stops
$615American Airlines
Find Deal
Tue, Aug 27 - Wed, Sep 11
8:15 pm - 3:35 pmIAD-BHD
14h 20m2 stops
6:50 am - 8:30 pmBHD-IAD
18h 40m1 stop
$644American Airlines
Find Deal
Wed, Jun 12 - Wed, Jun 19
5:25 pm - 4:50 pmIAD-BHD
18h 25m1 stop
5:20 pm - 10:43 pmBHD-IAD
34h 23m2 stops
$674Delta
Find Deal
Mon, Sep 2 - Tue, Dec 17
2:15 pm - 4:50 pmIAD-BHD
21h 35m2 stops
5:20 pm - 10:43 pmBHD-IAD
34h 23m2 stops
$678Delta
Find Deal
Tue, Aug 27 - Wed, Sep 11
5:18 pm - 11:30 amIAD-BHD
13h 12m2 stops
6:55 pm - 3:18 pmBHD-IAD
25h 23m2 stops
$783
Find Deal
Sun, Oct 13 - Sat, Oct 19
6:30 am - 11:40 amIAD-BFS
24h 10m2 stops
9:40 pm - 5:40 pmBFS-IAD
25h 00m2 stops
$787
Find Deal
Wed, May 29 - Wed, Jun 5
10:20 pm - 9:25 amIAD-BHD
54h 05m2 stops
3:35 pm - 7:25 pmBHD-IAD
56h 50m2 stops
$882Lufthansa
Find Deal
Thu, Jun 6 - Tue, Jun 11
10:20 pm - 2:50 pmIAD-BHD
35h 30m2 stops
10:15 am - 7:25 pmBHD-IAD
38h 10m2 stops
$1,122Lufthansa
Find Deal
Tue, Jul 16 - Sun, Jul 21
8:45 pm - 1:05 pmIAD-BFS
35h 20m2 stops
$402
Find Deal
Sun, Jun 23
8:45 pm - 8:15 pmIAD-BHD
18h 30m2 stops
$404
Find Deal
Sun, Jun 23
7:20 pm - 4:50 pmIAD-BHD
16h 30m2 stops
$434Delta
Find Deal
Tue, Jul 2
10:45 pm - 5:25 pmIAD-BHD
13h 40m1 stop
$470American Airlines
Find Deal
Tue, Jul 2
10:50 pm - 8:55 amIAD-BHD
29h 05m1 stop
$489British Airways
Find Deal
Sun, Jun 23
6:50 pm - 8:45 pmIAD-BHD
44h 55m3 stops
$493
Find Deal
Sun, Jun 23
11:15 pm - 10:25 pmIAD-BFS
42h 10m3 stops
$594
Find Deal
Sun, Jun 23
11:15 pm - 7:45 amIAD-BHD
27h 30m3 stops
$624
Find Deal
Tue, Jul 2

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 $681 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 ($595) and American Airlines ($615). Delta proposed the cheapest one-way flight at $434.

Good to know

Cheapest flight

$402
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 $402 for a one-way ticket and $595 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?

    SkyTeam, oneworld, 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.
6/23Sun
2 stops
35h 20mIAD-BFS
$402
6/23Sun
2 stops
18h 30mIAD-BHD
$404
7/2Tue
2 stopsDelta
16h 30mIAD-BHD
$434
7/2Tue
1 stopAmerican Airlines
13h 40mIAD-BHD
$470
6/23Sun
1 stopBritish Airways
29h 05mIAD-BHD
$489
6/23Sun
3 stops
44h 55mIAD-BHD
$493
6/23Sun
3 stops
42h 10mIAD-BFS
$594
7/2Tue
3 stops
27h 30mIAD-BHD
$624

Search by stops

Search by airline

Search by price

Washington Dulles Airport - Belfast Flights

Departure:

Washington Dulles Airport (undefined)United States

Cabin classes:

Browse origins:

Browse destinations: