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$402 Find cheap flights from Washington, D.C. 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 Washington, D.C. 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 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.
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
9:25 pm - 2:35 pmBWI-BHD
12h 10m1 stop
4:15 pm - 7:40 pmBHD-BWI
32h 25m1 stop
$595British Airways
Find Deal
Sun, Oct 13 - Sat, Oct 19
8:17 pm - 3:20 pmBWI-BHD
14h 03m2 stops
10:10 am - 7:40 pmBHD-BWI
14h 30m1 stop
$609American Airlines
Find Deal
Tue, Sep 17 - Fri, Sep 27
11:15 am - 12:55 pmBWI-BHD
20h 40m2 stops
11:50 am - 7:40 pmBHD-BWI
12h 50m1 stop
$611American Airlines
Find Deal
Tue, Aug 27 - Wed, Sep 11
2:30 pm - 4:50 pmDCA-BHD
21h 20m2 stops
5:20 pm - 6:14 pmBHD-DCA
29h 54m2 stops
$643Delta
Find Deal
Sun, Oct 13 - Sat, Oct 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
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

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 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, 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 Delta for $434. British Airways proposed a round-trip connection from $595 and American Airlines from $609.

Good to know

Cheapest flight

$402
Flight from Washington Dulles Airport to Belfast Intl 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 $402 for a one-way ticket and $595 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?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Washington, D.C. and Belfast, with SkyTeam 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.
6/23Sun
2 stops
35h 20mIAD-BFS
$402
6/23Sun
2 stops
18h 30mIAD-BHD
$404
6/23Sun
3 stops
22h 14mBWI-BFS
$422
7/2Tue
2 stopsDelta
16h 30mIAD-BHD
$434
7/2Tue
1 stopAmerican Airlines
13h 40mIAD-BHD
$470
6/23Sun
2 stopsBritish Airways
13h 55mBWI-BHD
$473
6/23Sun
2 stopsBritish Airways
17h 19mDCA-BHD
$487
6/23Sun
1 stopBritish Airways
29h 05mIAD-BHD
$489
6/23Sun
2 stops
19h 45mBWI-BFS
$490
6/23Sun
3 stops
44h 55mIAD-BHD
$493

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