IAD - BFS

$274 Find Cheap Flights from Washington Dulles Airport to Belfast Intl Airport

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 Intl departing on 4/27. 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 Intl Airport

 
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 round-trip
$686
Multiple Airlines
Sun 4/26Tue 5/12
IAD - BFS • 2 stops
Cheapest one-way
$274
Multiple Airlines
Mon 4/27
IAD - BFS • 3 stops
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Belfast Intl!
Flight Deals
Useful Info
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Belfast Intl 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 round-trip flight deals from Dulles Intl to Belfast Intl

Sun, Apr 26 - Tue, May 12
Multiple Airlines Logo
8:30 pm - 9:30 pm
IAD
-
BFS
20h 00m
2 stops
Multiple Airlines Logo
7:35 am - 3:10 pm
BFS
-
IAD
36h 35m
3 stops
$686Multiple Airlines
Tue, Apr 28 - Tue, May 5
Multiple Airlines Logo
8:30 pm - 11:20 pm
IAD
-
BFS
21h 50m
3 stops
Multiple Airlines Logo
7:35 am - 3:10 pm
BFS
-
IAD
36h 35m
3 stops
$712Multiple Airlines
Mon, Apr 27 - Mon, May 4
Multiple Airlines Logo
8:30 pm - 11:20 pm
IAD
-
BFS
21h 50m
3 stops
Multiple Airlines Logo
9:25 pm - 8:35 pm
BFS
-
IAD
28h 10m
3 stops
$748Multiple Airlines
Sun, Apr 26 - Tue, May 12
Multiple Airlines Logo
8:30 pm - 10:30 pm
IAD
-
BFS
21h 00m
3 stops
Multiple Airlines Logo
7:35 am - 3:10 pm
BFS
-
IAD
36h 35m
3 stops
$750Multiple Airlines
Wed, Apr 22 - Tue, Apr 28
Multiple Airlines Logo
8:30 pm - 9:00 pm
IAD
-
BFS
19h 30m
3 stops
Multiple Airlines Logo
8:15 pm - 3:10 pm
BFS
-
IAD
47h 55m
3 stops
$752Multiple Airlines
Wed, Apr 29 - Wed, May 6
Multiple Airlines Logo
1:20 pm - 3:35 pm
IAD
-
BFS
21h 15m
2 stops
Multiple Airlines Logo
5:55 am - 11:35 am
BFS
-
IAD
34h 40m
2 stops
$778Multiple Airlines
Tue, Apr 28 - Tue, May 5
Multiple Airlines Logo
8:30 pm - 4:20 pm
IAD
-
BFS
14h 50m
2 stops
Multiple Airlines Logo
8:15 pm - 8:35 pm
BFS
-
IAD
29h 20m
3 stops
$784Multiple Airlines
Wed, Apr 22 - Tue, Apr 28
Multiple Airlines Logo
1:20 pm - 9:00 pm
IAD
-
BFS
26h 40m
2 stops
Multiple Airlines Logo
8:50 am - 11:35 am
BFS
-
IAD
31h 45m
2 stops
$788Multiple Airlines
Mon, Apr 27 - Mon, May 4
Multiple Airlines Logo
8:30 pm - 8:40 pm
IAD
-
BFS
19h 10m
2 stops
Multiple Airlines Logo
9:25 pm - 8:35 pm
BFS
-
IAD
28h 10m
3 stops
$827Multiple Airlines
Wed, Apr 22 - Tue, Apr 28
Multiple Airlines Logo
8:30 pm - 10:20 pm
IAD
-
BFS
20h 50m
2 stops
Multiple Airlines Logo
8:15 pm - 3:10 pm
BFS
-
IAD
47h 55m
3 stops
$860Multiple Airlines
Useful Info

Good to know

Cheapest flight$274
Flight from Washington Dulles Airport to Belfast Intl Airport

When to book flights from Dulles Intl to Belfast Intl

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

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport was $274 for a one-way ticket and $686 for a round-trip.

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

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

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

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

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

    oneworld is the only airline alliance operating flights between Washington Dulles Airport and Belfast Intl Airport.

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

    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 Intl Airport.

  • 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 Intl Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast Intl Airport 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 Intl Airport?

    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 Intl Airport with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and BFS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to Belfast Intl Airport?

    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 Intl Airport from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Dulles Intl to Belfast Intl

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Belfast. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Dulles Intl to Belfast Intl? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
6.7
British AirwaysOverall score based on 7800 reviews
6.4Food
6.9Boarding
6.8Comfort
6.4Entertainment
7.6Crew
Airline reviews

Very good staff members with sincere passion and responsibility in their job.

10.0 ExcellentAnonymous, Mar 2026
ORD - LHR
Read more British Airways reviews

Very good staff members with sincere passion and responsibility in their job.

Very please with the seating that the Kayak staff booked for us!

Worth every penny to upgrade to BC. Treated and felt more like First Class

Good service, food and comfort in World Traveller Plus. Entertainment was poor - no wifi on the way out and barely working on the way back. Not a great choice of entertainment on the seat back tv.

They had us seating down for one hour just waiting on the plane

Flying with BA is always a good experience—even in economy class. It is better if in business and first class. Timely, breeze through security and timely connections

We waited at BOS at the gate for an hour and couldn’t get a drink or anything. Once in the air the service, food and ride was excellent.

My enetertainmnet screen was broken. Lost my bags. Almost missed my flight do to connection issues with (despite a request) ZERO help from crew. Food was edible. Potatoes pretty good even

The issue was not with BA it was with the link yoiu sent fopr booking the flight

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

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

Information on your arrival and departure airports

Washington Dulles Airport (IAD)
Belfast Intl (BFS)