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Cheap flights from Ireland to Washington, D.C. Dulles Intl Airport from £347

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/7. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — IAD
24 Jun — 1 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ireland to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Ireland to Dulles Intl
Explore the most affordable flight options available from Ireland to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 May 2026.

Tue 28/714:15
DUB
-
IAD
1 stop10h 05m
Icelandair
Sat 22/820:30
IAD
-
DUB
1 stop9h 35m
Icelandair
Deal found 22/5£453
Fri 29/513:15
DUB
-
IAD
1 stop10h 38m
KLM
Sat 6/617:21
IAD
-
DUB
1 stop11h 39m
KLM
Deal found 22/5£454
Wed 29/711:45
DUB
-
IAD
1 stop15h 20m
British Airways
Fri 21/813:23
IAD
-
DUB
1 stop15h 12m
British Airways
Deal found 22/5£455
Wed 29/712:35
DUB
-
IAD
Nonstop8h 10m
Aer Lingus
Fri 21/820:55
IAD
-
DUB
Nonstop7h 00m
Aer Lingus
Deal found 23/5£455
Tue 28/712:35
DUB
-
IAD
Nonstop8h 10m
Aer Lingus
Sat 22/817:15
IAD
-
DUB
Nonstop7h 00m
Aer Lingus
Deal found 22/5£456
Mon 15/610:30
DUB
-
IAD
1 stop12h 00m
British Airways
Mon 29/617:40
IAD
-
DUB
1 stop11h 00m
British Airways
Deal found 23/5£460
Tue 28/713:45
DUB
-
IAD
2 stops15h 25m
American Airlines
Sat 22/818:24
IAD
-
DUB
1 stop10h 11m
American Airlines
Deal found 22/5£461
Wed 24/610:30
DUB
-
IAD
1 stop12h 00m
British Airways
Fri 10/719:15
IAD
-
DUB
1 stop17h 35m
British Airways
Deal found 24/5£463
Tue 1/911:40
DUB
-
IAD
2 stops34h 20m
Scandinavian Airlines
Sat 5/920:20
IAD
-
DUB
2 stops33h 05m
Scandinavian Airlines
Deal found 20/5£466
Tue 23/608:35
DUB
-
IAD
2 stops15h 58m
British Airways
Thu 9/717:45
IAD
-
DUB
1 stop15h 45m
British Airways
Deal found 24/5£466
Thu 30/711:45
DUB
-
IAD
1 stop12h 55m
American Airlines
Sat 22/818:24
IAD
-
DUB
1 stop10h 11m
American Airlines
Deal found 23/5£467
Tue 28/711:45
DUB
-
IAD
1 stop12h 49m
American Airlines
Thu 20/818:24
IAD
-
DUB
1 stop10h 11m
American Airlines
Deal found 20/5£469

Find flight deals from Ireland to Dulles Intl

Keep the following information in mind while searching for Ireland to Dulles Intl flight deals. Data was last updated 25 May 2026.

Round-trip from

£453

One-way from

£347

Popular in

March

Cheapest in

September

Average price

£548

Good round-trip deal

£550 or less
Icelandair
  • Icelandair
  • 28/7-22/8
  • 2 total stops
  • 19h 40m total
  • Ireland to Washington, D.C.
Search Deals
28/7
  • 28/7
  • 3 total stops
  • 34h 00m total
  • Ireland to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (£2 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from Ireland to Washington, D.C. Dulles Intl.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ireland to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 25 May 2026.
Use the filters below to find and compare flights from Ireland to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Tue 23/6

08:35-19:33

2 stops15h 58m

Washington, D.C. Dulles Intl

Wed 8/7

17:45-09:40

1 stop10h 55m

£466

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Tue 23/6

08:35-19:33

2 stops15h 58m

Washington, D.C. Dulles Intl

Thu 9/7

17:45-14:30

1 stop15h 45m

£466
Fastest return journey

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Tue 20/10

14:15-19:20

1 stop10h 05m

Washington, D.C. Dulles Intl

Tue 10/11

19:40-10:15

1 stop9h 35m

£497

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Wed 21/10

11:40-17:00

2 stops34h 20m

Washington, D.C. Dulles Intl

Wed 4/11

20:30-10:10

2 stops32h 40m

£498

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Fri 23/10

07:30-15:55

1 stop13h 25m

Washington, D.C. Dulles Intl

Fri 6/11

18:20-12:05

1 stop12h 45m

£513

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Wed 21/10

10:30-17:25

1 stop11h 55m

Washington, D.C. Dulles Intl

Wed 4/11

18:20-09:40

1 stop10h 20m

£513
Cheapest one-way

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Thu 12/11

08:50-15:35

1 stop11h 45m

£393

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Wed 29/7

09:40-10:45

3 stops30h 05m

£434

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Tue 11/8

06:25-15:30

2 stops38h 05m

£443

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Thu 1/10

13:45-20:20

1 stop11h 35m

£448

Flights are sorted by cheapest return flights first.

Deals found on 22/5

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

Best time to book a flight from Ireland to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Ireland with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ireland to Washington, D.C. Dulles Intl Airport

What is the cheapest month to book a flight from Ireland to Washington, D.C. Dulles Intl Airport?

Currently, December is the cheapest month in which you can book a flight from Ireland to Washington, D.C. Dulles Intl Airport (average of £272). Flying from Ireland to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £449). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IE to IAD?

Find hourly flight availability from Ireland to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 25 May 2026.

When flying from Ireland to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Ireland to Washington, D.C. Dulles Intl Airport

Explore weekly flight availability from Ireland to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 25 May 2026.

The most flights from IE0 to IAD are scheduled on a Friday (15 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 on average).

How often are flights from Ireland to Washington, D.C. delayed?

About 14% of weekly flights between Ireland and Washington, D.C. have experienced delays in the past year, with the average delay time being 155 minutes.

What is the most punctual flight time for Ireland to Washington, D.C. flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Ireland to Washington, D.C. flights?

Over the past year, Aer Lingus have had the lowest number of delays on this route, with just 13% of flights being delayed.

How far ahead should I book a flight from Ireland to Washington, D.C. Dulles Intl Airport?

Booking 33 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ireland to Washington, D.C. Dulles Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated 25 May 2026.
Get a feel of what it's like to fly with United Airlines,Aer Lingus, andLufthansa from Ireland to Washington, D.C. Dulles Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,752 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,752 reviews
United Airlines
7.4
Good
9,752 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
Aer Lingus
7.3
Good
1,580 reviews
United Airlines
7.4
Good
9,752 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
Lufthansa
6.8
Okay
8,024 reviews
United Airlines
7.4
Good
9,752 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

Related info for your journey

Find useful and relevant information for your journey from Ireland to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ireland to Washington, D.C. Dulles Intl Airport?

    For as low as £463, British Airways can have you in Washington, D.C. Dulles Intl Airport from Ireland in 12h. Airlines will cover a distance of 3393 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most reliable airlines from Ireland to Washington, D.C. Dulles Intl Airport?

    Before booking your flight to Washington, D.C. Dulles Intl Airport from Ireland, check out the most reliable airlines to get you to your destination on time: SWISS (89%), Lufthansa (87%), Air Canada( 86%).

  • What are the cheapest flights from Ireland to Washington, D.C. Dulles Intl Airport?

    On average you can expect to pay £685 for a flight from Ireland to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £428 while the most popular route, (Dublin - Washington, D.C. Dulles Intl) is currently priced at £455.

  • Can I find deals for flights from Ireland to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Ireland to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Ireland to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ireland to Dulles Intl.

  • Can I find deals for business class flights from Ireland to Dulles Intl?

    Yes. Cheapflights offers flight deals from Ireland to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ireland to Washington, D.C. Dulles Intl Airport?

    Currently, December is the cheapest month in which you can book a flight from Ireland to Washington, D.C. Dulles Intl Airport (average of £272). Flying from Ireland to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £449). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Gaithersburg
Woodbridge
Arlington
Alexandria
Sterling

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ireland to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Dulles Intl flights
Heathrow to Baltimore flights
Heathrow to Reagan-National flights
Gatwick to Dulles Intl flights
Stansted to Dulles Intl flights
London City to Dulles Intl flights
Gatwick to Baltimore flights
Gatwick to Reagan-National flights
Luton to Dulles Intl flights
Manchester to Dulles Intl flights
Edinburgh to Dulles Intl flights
Manchester to Baltimore flights
Manchester to Reagan-National flights
Luton to Baltimore flights
Newcastle upon Tyne to Dulles Intl flights
Glasgow Intl to Dulles Intl flights
Edinburgh to Reagan-National flights
Newcastle upon Tyne to Reagan-National flights
Birmingham to Dulles Intl flights
Newcastle upon Tyne to Baltimore flights
Stansted to Baltimore flights
Southampton to Dulles Intl flights
Edinburgh to Baltimore flights
Birmingham to Baltimore flights
Glasgow Intl to Baltimore flights
Birmingham to Reagan-National flights
Leeds to Dulles Intl flights
Glasgow Intl to Reagan-National flights
London City to Baltimore flights
London City to Reagan-National flights
Southend to Dulles Intl flights
Southampton to Baltimore flights
Amsterdam to Dulles Intl flights
Leeds to Baltimore flights
Bristol to Baltimore flights
Bristol to Dulles Intl flights
Cardiff to Dulles Intl flights
Leeds to Reagan-National flights
Bristol to Reagan-National flights
Dublin to Dulles Intl flights
Liverpool to Baltimore flights
Aberdeen to Dulles Intl flights
Belfast Intl to Baltimore flights

Top 3 airlines flying from Ireland to Dulles Intl

Discover the top 3 airlines that operate flights from Ireland to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 25 May 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£295Average£414FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£334Average£597FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Aer LingusCheapest£340Average£446FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ireland to Dulles Intl?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Dulles Intl from Ireland today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Ireland to Dulles Intl?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Ireland to Dulles Intl.

Can Cheapflights find flights from Ireland to Dulles Intl with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Ireland to Dulles Intl, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Ireland to Dulles Intl become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Dulles Intl from Ireland today and book when prices fit your budget.

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