£271 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 22/9. 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
1 adult, Economy, 0 bags

KAYAK searches 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
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Everything you should know

Cheapest return fare
£600
Multiple Airlines
Wed 27/5Wed 3/6
IAD - BFS • 2 stops
Cheapest one-way flight
£271
British Airways
Tue 22/9
IAD - BHD • 1 stop
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Dulles Intl to Belfast (IAD-BHD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Dulles Intl 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 for you by selecting your travel dates on KAYAK.

Recent return flight deals from Dulles Intl to Belfast

Wed, 27 May - Wed, 3 Jun
Multiple Airlines Logo
09:55 - 15:55
IAD
-
BFS
25h 00m
2 stops
Multiple Airlines Logo
08:30 - 15:10
BFS
-
IAD
35h 40m
3 stops
£600Multiple Airlines
Mon, 24 Aug - Mon, 31 Aug
Multiple Airlines Logo
20:30 - 22:15
IAD
-
BFS
20h 45m
2 stops
Multiple Airlines Logo
08:40 - 15:10
BFS
-
IAD
35h 30m
3 stops
£611Multiple Airlines
Mon, 24 Aug - Mon, 31 Aug
Multiple Airlines Logo
20:30 - 23:20
IAD
-
BFS
21h 50m
3 stops
Multiple Airlines Logo
08:40 - 15:10
BFS
-
IAD
35h 30m
3 stops
£618Multiple Airlines
Sun, 31 May - Wed, 10 Jun
Multiple Airlines Logo
09:55 - 21:00
IAD
-
BFS
30h 05m
2 stops
Multiple Airlines Logo
20:15 - 15:10
BFS
-
IAD
47h 55m
3 stops
£627Multiple Airlines
Wed, 27 May - Wed, 3 Jun
Multiple Airlines Logo
09:55 - 17:05
IAD
-
BFS
26h 10m
2 stops
Multiple Airlines Logo
06:15 - 18:58
BFS
-
IAD
17h 43m
2 stops
£630Multiple Airlines
Mon, 11 May - Thu, 14 May
Multiple Airlines Logo
20:30 - 20:40
IAD
-
BFS
19h 10m
2 stops
Multiple Airlines Logo
09:15 - 15:10
BFS
-
IAD
34h 55m
3 stops
£636Multiple Airlines
Mon, 14 Sep - Wed, 23 Sep
British Airways Logo
19:15 - 12:55
IAD
-
BHD
12h 40m
1 stop
British Airways Logo
11:35 - 20:20
BHD
-
IAD
13h 45m
1 stop
£708British Airways
Tue, 22 Sep - Wed, 30 Sep
British Airways Logo
17:45 - 10:45
IAD
-
BHD
12h 00m
1 stop
British Airways Logo
06:30 - 20:20
BHD
-
IAD
18h 50m
1 stop
£709British Airways
Tue, 22 Sep - Wed, 30 Sep
American Airlines Logo
20:15 - 15:20
IAD
-
BHD
14h 05m
2 stops
American Airlines Logo
11:35 - 23:51
BHD
-
IAD
17h 16m
2 stops
£735American Airlines
Mon, 14 Sep - Wed, 23 Sep
Virgin Atlantic Logo
18:10 - 09:20
IAD
-
BHD
10h 10m
1 stop
Virgin Atlantic Logo
09:50 - 00:10
BHD
-
IAD
19h 20m
2 stops
£747Virgin Atlantic
Booking Insights

KAYAK’s insights & trends for Dulles Intl to Belfast flights

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.

Which airlines provide the cheapest flights from Washington Dulles Airport to Belfast?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest return tickets from Washington Dulles Airport to Belfast were found on British Airways (£708) and American Airlines (£735).

Find deals

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 return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns 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 £271 for a one-way ticket and £600 for a return.

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

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

Everything you need to know for your flight from Dulles Intl to Belfast

Information on your arrival and departure airports

Washington Dulles Airport (IAD)