$619 Find Cheap Flights from Washington Dulles Airport to Northern Ireland

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Northern Ireland departing on 9/2. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Northern Ireland

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Northern Ireland, 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 Northern Ireland, as well as popular online travel agencies
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Cheap Flights from Dulles Intl to Northern Ireland

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Belfast
Belfast1 stop$619
Belfast
Belfast1 stop$619

Book Cheap Dulles Intl to Northern Ireland Plane Tickets

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

Tue, Sep 2 - Fri, Sep 12
British Airways Logo
7:25 pm - 10:35 amIAD-BHD
10h 10m1 stop
British Airways Logo
8:05 pm - 3:00 pmBHD-IAD
23h 55m2 stops
$619British Airways
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Tue, Oct 7 - Sun, Oct 12
British Airways Logo
7:25 pm - 1:00 pmIAD-BHD
12h 35m1 stop
British Airways Logo
6:50 am - 8:20 pmBHD-IAD
18h 30m1 stop
$625British Airways
Find Deal
Sat, Sep 6 - Sat, Dec 20
British Airways Logo
2:21 pm - 12:15 pmIAD-BHD
16h 54m2 stops
British Airways Logo
6:00 pm - 3:35 pmBHD-IAD
26h 35m1 stop
$629British Airways
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Fri, Sep 12 - Fri, Sep 19
Logo
11:15 pm - 8:05 pmIAD-BFS
15h 50m2 stops
Logo
6:05 am - 10:10 pmBFS-IAD
21h 05m2 stops
$630
Find Deal
Sun, Aug 17 - Sun, Aug 24
Logo
5:25 pm - 4:55 pmIAD-BHD
18h 30m1 stop
Logo
6:30 am - 3:35 pmBHD-IAD
14h 05m1 stop
$706
Find Deal
Mon, Sep 1 - Mon, Sep 15
Delta Logo
5:25 pm - 9:15 pmIAD-BHD
22h 50m1 stop
Delta Logo
6:30 am - 3:35 pmBHD-IAD
14h 05m1 stop
$707Delta
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Sun, Aug 17 - Sun, Aug 24
Delta Logo
8:23 pm - 9:15 pmIAD-BHD
19h 52m2 stops
Delta Logo
6:30 am - 3:35 pmBHD-IAD
14h 05m1 stop
$710Delta
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Wed, Nov 12 - Sun, Nov 16
KLM Logo
11:00 am - 9:00 pmIAD-BHD
29h 00m2 stops
KLM Logo
6:30 am - 4:05 pmBHD-IAD
14h 35m1 stop
$765KLM
Find Deal
Wed, Nov 12 - Sun, Nov 16
KLM Logo
11:00 am - 4:50 pmIAD-BHD
24h 50m2 stops
KLM Logo
5:20 pm - 4:31 pmBHD-IAD
28h 11m2 stops
$775KLM
Find Deal
Wed, Nov 12 - Sun, Nov 16
Virgin Atlantic Logo
6:05 pm - 9:00 pmIAD-BHD
21h 55m1 stop
Virgin Atlantic Logo
6:30 am - 4:05 pmBHD-IAD
14h 35m1 stop
$796Virgin Atlantic
Find Deal
Booking Insights

KAYAK's insights & trends for Dulles Intl to Northern Ireland flights

Get data-powered insights and trends into flights from Dulles Intl to Northern Ireland to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Washington, D.C. Dulles Intl Airport to Northern Ireland?

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 round-trip tickets from Washington, D.C. Dulles Intl Airport to Northern Ireland were found on British Airways ($619) and Delta ($707).

Find deals

Good to know

Low seasonApril
Cheapest flight$619
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly with an average 19% increase in price.
Flight from Washington Dulles Airport to Belfast City Airport

FAQs - booking Northern Ireland flights

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

    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 Northern Ireland.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Washington Dulles Airport to Northern Ireland 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 Northern Ireland?

    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 from Washington Dulles Airport to Northern Ireland with an airline and back 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 Northern Ireland?

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

  • What is the cheapest time of day to fly to Northern Ireland?

    The cheapest time of day to fly to Northern Ireland is generally in the evening, when round-trip flights cost $767 on average. Morning departures are around 100% cheaper than evening flights, on average. The most expensive time of day to fly to Northern Ireland is generally at night, which is peak travel time and where the average cost of a ticket is $800.

Reviews of the top airline flying from Dulles Intl to Northern Ireland

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Northern Ireland. 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 Northern Ireland? 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.
6.6
British AirwaysOverall score based on 7217 reviews
7.6Crew
6.9Boarding
6.4Entertainment
6.7Comfort
6.3Food
Airline reviews

My experience with British Airways is excellent, thanks for all 🫶🏻✈️

10.0 ExcellentEmilio, Jul 2025BOS - LHR
Read more British Airways reviews

My experience with British Airways is excellent, thanks for all 🫶🏻✈️

Old tired plane, Uncomfortable business class seat. Breakfast dreadful and meagre. At least flight was on time!

The crew is very friendly and helpful. The food is good for airplane food. The flight is long and hard to sleep. The leg space is great. The plane arrived in plenty of time.

Enjoyable flight, helpful crew everything was organized to accommodate passengers.

Captain sick. Unable to get replacement so delayed me 30 hours, many others delayed 54 hours. TOTALLY DESTROYED ALL MY PLANS, including lost my rental car which would now cost over 5 times what I paid so stuck with buses n trains... lost hotel reservations.... HORRIBLE!!!

They’ve lost my bag and I have no way of really getting in touch with anyone and have received no updates.

Very crowded, no real explanation of food "chicken or pasta?" After dinner no drinks service. Plane was clean, but little help with finding soaces fir luggage to get into overhead bins. Many passengers putting 2 bags, hats, duty free in overhead bins so no space for roll ons

Flight was good but seat in 12D was not comfortable, better on the Airbus 321 from Tampa to Charlotte. No breakfast was served before landing in zLonfon only a coffee and orange juice.

I was transferred to an American Airlines flight. The boarding was late and unorganized. The seating was extremely tight and uncomfortable. Will not use AA again.

The entertainment selection was ok, but overall not bad! The crew was great.

Everything you need to know for your flight from Dulles Intl to Northern Ireland

Information on your arrival and departure airports

Washington Dulles Airport (IAD)

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