£445 Find Cheap Flights from Ireland to Washington, D.C.

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight to Dulles Intl departing on 19/5. 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 Washington, D.C. Dulles Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Washington, D.C., as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Washington, D.C., as well as popular online travel agencies
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Flight Deals

Cheap Flights from Ireland to Dulles Intl

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Ireland to Dulles 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 return flight deals from Ireland to Dulles Intl

Tue, 19 May - Fri, 29 May
British Airways Logo
08:35 - 15:45
DUB
-
IAD
12h 10m
1 stop
British Airways Logo
17:35 - 09:40
IAD
-
DUB
11h 05m
1 stop
£445British Airways
Tue, 23 Jun - Sun, 28 Jun
British Airways Logo
20:25 - 17:30
DUB
-
IAD
26h 05m
1 stop
British Airways Logo
22:25 - 16:20
IAD
-
DUB
12h 55m
1 stop
£447British Airways
Sat, 6 Jun - Thu, 2 Jul
British Airways Logo
08:35 - 17:30
DUB
-
IAD
13h 55m
1 stop
British Airways Logo
17:45 - 19:20
IAD
-
DUB
20h 35m
1 stop
£447British Airways
Tue, 23 Jun - Sun, 28 Jun
British Airways Logo
08:35 - 15:50
DUB
-
IAD
12h 15m
1 stop
British Airways Logo
17:40 - 16:20
IAD
-
DUB
17h 40m
1 stop
£448British Airways
Thu, 4 Jun - Wed, 10 Jun
Aer Lingus Logo
12:35 - 15:45
DUB
-
IAD
8h 10mdirect
Aer Lingus Logo
21:00 - 08:55
IAD
-
DUB
6h 55mdirect
£450Aer Lingus
Mon, 29 Jun - Mon, 6 Jul
British Airways Logo
11:45 - 00:13
DUB
-
IAD
17h 28m
1 stop
British Airways Logo
20:22 - 09:35
IAD
-
DUB
32h 13m
1 stop
£453British Airways
Tue, 19 May - Thu, 28 May
Aer Lingus Logo
12:35 - 15:45
DUB
-
IAD
8h 10mdirect
Aer Lingus Logo
20:45 - 08:40
IAD
-
DUB
6h 55mdirect
£457Aer Lingus
Thu, 4 Jun - Wed, 10 Jun
KLM Logo
08:55 - 15:35
DUB
-
IAD
11h 40m
1 stop
KLM Logo
17:29 - 10:00
IAD
-
DUB
11h 31m
1 stop
£458KLM
Tue, 20 Oct - Tue, 10 Nov
Icelandair Logo
14:15 - 19:20
DUB
-
IAD
10h 05m
1 stop
Icelandair Logo
19:40 - 10:15
IAD
-
DUB
9h 35m
1 stop
£459Icelandair
Wed, 3 Jun - Wed, 10 Jun
KLM Logo
08:55 - 15:35
DUB
-
IAD
11h 40m
1 stop
KLM Logo
17:29 - 10:00
IAD
-
DUB
11h 31m
1 stop
£461KLM
Booking Insights

KAYAK's insights & trends for flights to Dulles Intl

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

What is the cheapest flight to Washington, D.C.?

These are the best round-trip prices found by users searching on KAYAK in the last 72 hours.

In the last 3 days, the cheapest flight deal to Washington, D.C. was found on the route from Dublin, at £445 return. The most popular connection is from London to Washington, D.C. and KAYAK users have found return deals for as low as £423 in the last 3 days.

What is the cheapest day to fly to Washington, D.C.?

The average price of all round-trip flights to Washington, D.C. Dulles Intl Airport clicked on KAYAK for each day over the last 12 months.

Based on KAYAK data, the cheapest day to fly to Washington, D.C. is Tuesday where round-trip tickets can be as cheap as £580. On the other hand, the most expensive day to fly is Wednesday, where round-trip prices are £655 on average.

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Washington, D.C. Dulles Intl Airport, 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 to Washington, D.C. Dulles Intl Airport is November, where tickets cost £359 on average for return flights. On the other hand, the most expensive months are July and August, where the average cost of tickets from Ireland is £602 and £598 respectively. For one-way flights, the best month to travel is November with an average price of £359.

What is the cheapest time of day to fly to Washington, D.C. Dulles Intl Airport?

The average price for all round-trip flights to Washington, D.C. Dulles Intl Airport depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Washington, D.C. Dulles Intl Airport is generally in the evening, when round-trip flights cost £510 on average. The most expensive time of day to fly to Washington, D.C. Dulles Intl Airport is generally in the morning, which is peak travel time and where the average cost of a ticket is £627.

What is a good deal for flights to Washington, D.C. Dulles Intl Airport?

If you’re looking for cheap airfare to Washington, D.C. Dulles Intl Airport, 25% of our users found tickets to Washington, D.C. Dulles Intl Airport for the following prices or less: From Dublin £656 return.

How far in advance should I book a flight to Washington, D.C. Dulles Intl Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price, you should book around 5 weeks before departure, which saves you about 20% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know - Cheap tickets from Ireland to Washington, D.C.

Low seasonApril
Cheapest flight£445
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly (27% more expensive on average)
Flight from Dublin to Washington, D.C.

FAQs - booking Washington, D.C. flights

  • What is the cheapest flight to Washington, D.C.?

    In the last 3 days, the cheapest flight deal to Washington, D.C. was found on the route from Dublin, at £445 return. The most popular connection is from London to Washington, D.C. and KAYAK users have found return deals for as low as £423 in the last 3 days.

  • How far is Washington, D.C. Dulles Intl Airport from central Washington, D.C.?

    There are 22 miles between Washington, D.C. city centre and Washington, D.C. Dulles Intl Airport.

  • How much is a flight to Washington, D.C.?

    On average, a flight to Washington, D.C. costs £676. The cheapest price found on KAYAK in the last 2 weeks cost £352 and departed from Dublin Airport.

  • How does KAYAK find such low prices on flights to Washington, D.C.?

    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 to Washington, D.C..

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to Washington, D.C.?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington, D.C. is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights to Washington, D.C.?

    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 Washington, D.C. 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 to Washington, D.C.?

    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 Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Washington, D.C.

  • Looking for cheap airfare to Washington, D.C.? 25% of our users found round-trip tickets to Washington, D.C. for the following prices or less: Cheap flights to Washington, D.C. from Dublin £558
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Washington, D.C. flight deals.

Reviews of the top 3 airlines flying from Ireland to Dulles Intl

 
See real verified KAYAK customer reviews for airlines flying to Washington, D.C.. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Ireland to Washington, D.C.. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Dulles 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.
7.4
United AirlinesOverall score based on 9678 reviews
7.7Boarding
7.3Comfort
8.1Crew
6.6Food
7.1Entertainment
Airline reviews

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

8.0 ExcellentAnonymous, Apr 2026
DEN - IAD
Read more United Airlines reviews

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

Terrific in every way. On time, professional staff, multiple movie options to select, great food and drink.

My bags were misplaced!!! Im in a foreign country with no bags

I liked that it was on time, however, the food was not good.

Offered to check carry on to final destination. This is the most absurd thing in the world. I'm carrying on because I need what is in the carry-on. I'm okay with picking up at next stop but then I will be on much larger plane that can accommodate it. Also, if there is ever a change to your flight. Go to the airport and have the people there fix your ticket. Don't do it over the phone or online with United they screwed us up and ended up with flights for our last leg that took off before our first leg.

United is one airline which regardless of how many separate United tickets in existence, if one flight breaks down, the airline will take care of all the flights.

It was okay, the food was good, but after the landing there was not enough time for luggage and security to catch a connection. It was crowded on board.

When I went to check in at the United counter in Barcelona, Spain I had 2 different menat 2 different times in United uniforms (standing around with a couple other employees) ask me if I was traveling alone. The one man asked me 3 different ways if I was traveling alone. I am, 68 yeaers old and have all my faculties. I thought it was weird and it made me feel very uncomfortable. What difference does it make if I was traveling alone or with someone? What if I was a recent widow? That would have been horrible. They never gave me a reason why they needed to know who I was traveling with. I was hesitant to question them because I needed to be on that flight.

Crew was great. 2 1/2 hour delay was due to staff needing "rest" was avoidable and self inflicted as United not willing to hire enough crew to keep flight on time.. Ridiculous. The crew and the passengers both suffered due to this.

Fine not above and beyond as I had a connection that was delayed due to maintenance

I sat in the first row behind first class. There was plenty of legroom. The entertainment was great. I saw two excellent movies and one episode of a sitcom. Also enjoyed the flight tracker.

OK overall. Flight was delayed Crew on flight was good

On time, only a little turbulence, very competent and caring attendants. Clear information.

Late late late. Delayed and arrived an hour late for a 1 hour 45 minute connection. Every time. Poor record for this company. I try to fly any other carrier first.

The flights are literally always delayed arriving, boarding and taking off so they are always late for the connection. I planned ahead so I was okay but many others aren't. The food was terrible. The staff was very pleasant. I appreciate boarding back to front.

The crew was friendly. The plane was comfortable. In-flight wifi didn't work well at all. The ride was quite turbulent but understandable given the weather.

My issue is with the SkyWest terminal. The flight was not listed on the main airport flight screen list, and I had to do a Google search to locate the terminal and gate. We had to ask several airport employees where to locate the phantom gate. The airport did not provide adequate signage and was confusing. When we arrived, there was one vendor providing services that quickly closed, leaving zero options for food and drink while we waited hours for our delayed flight. The crew that assisted with check-in and boarding was VERY friendly.

Economy seats a bit small but other than that it was all good.

No complimentary drinks or snacks offered on a 2 hour flight was disappointing but everything else went well

All aspects were excellent - it helped that the flight was only 2/3 full and I had no one sitting in my row. The Pre-check (US Passport Control and Customs) in Dublin made everything so easy when we arrived in Chicago.

Flight was delayed by several hours and then cancelled due to weather. But Staff was very helpful getting me on a different flight. United should offer food coupons and tooth brush and paste for stranded passengers

Service was excellent. Flight was only about half full, which meant we had tons of room to stretch out. Boarding area was nice and well organized, flight attendants were super friendly and attentive and we loved the 3 snacks!

My flight was cancelled, but it was not Kayak's fault. Kayak did require me to pay for the ticket twice to two different venders who paid Lufthansa. Kayak/Lufthansa owes me for the first booking I made first was fraudulent on the part of the subcontracting ticket seller. There will be litigation over this issue under the current passenger protection laws.

flight was half full, plenty of empty seats, was able to lie down across 4 seats, food was good, arrived on time

Was never allowed on and not refunded the full amount of the ticket plus charged a $300 processing fee.

Terrible. Our flight was completely cancelled with no options to rebook until 4 days later.

Bulkhead seats should not be an extra charge. They are extremely uncomfortable. And we missed our connecting flight due to slow luggage retreaval.

Lufthansa flight LH04414 from Munich to Washington DC, was fine. Efficient and safe!

Bumpy ride, not Lufthansa‘s fault. Crew managed a situation over a back rest to far down well. It was two iles behind me. The person putting the seat down, against the other person’s knees, was quite rude and belligerent and needed to be told in a no nonsense matter to stopp. Male flight attendant did good job.

Had a few open seats and could use it for a great rest ful journey

Travelling to a place near Dulles Intl?

Book flights to Dulles Intl if you plan to visit one of these locations
Alexandria
Winchester
Annapolis
Fairfax
Gaithersburg
Fredericksburg
Silver Spring
Tysons
Rockville
National Harbor
Woodbridge
Sterling
Chantilly
Cambridge
Reston
Westminster
Falls Church
Owings Mills
Laurel
College Park

Everything you need to know for your flight to Dulles Intl

Information on the airport you'll fly into in Washington, D.C.