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Cheap flights from Ireland to Washington, D.C. Dulles Intl Airport from £359

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 30/9. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — IAD
5 Aug — 12 Aug1
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 6 July 2026.

Tue 20/1005:55
DUB
-
IAD
2 stops16h 38m
Delta
Tue 3/1110:07
IAD
-
DUB
2 stops17h 53m
Delta
Deal found 2/7£446
Mon 24/809:40
DUB
-
IAD
2 stops15h 44m
Multiple Airlines
Mon 31/820:30
IAD
-
DUB
1 stop11h 45m
Multiple Airlines
Deal found 4/7£451
Wed 21/1008:55
DUB
-
IAD
2 stops19h 16m
Delta
Wed 4/1119:59
IAD
-
DUB
2 stops15h 21m
Delta
Deal found 4/7£451
Fri 28/819:50
DUB
-
IAD
2 stops26h 10m
Scandinavian Airlines
Thu 17/920:20
IAD
-
DUB
1 stop17h 00m
Scandinavian Airlines
Deal found 3/7£453
Thu 27/813:00
DUB
-
IAD
1 stop12h 20m
British Airways
Wed 2/917:45
IAD
-
DUB
1 stop14h 10m
British Airways
Deal found 2/7£454
Sun 4/1010:30
DUB
-
IAD
1 stop11h 55m
British Airways
Sat 17/1019:15
IAD
-
DUB
1 stop11h 45m
British Airways
Deal found 5/7£454
Fri 28/808:35
DUB
-
IAD
1 stop12h 20m
British Airways
Thu 3/922:25
IAD
-
DUB
1 stop15h 55m
British Airways
Deal found 3/7£455
Wed 28/1005:45
DUB
-
IAD
1 stop15h 10m
Delta
Sun 1/1116:44
IAD
-
DUB
2 stops14h 56m
Delta
Deal found 2/7£457
Tue 20/1005:55
DUB
-
IAD
2 stops16h 38m
Delta
Tue 10/1107:00
IAD
-
DUB
2 stops21h 00m
Delta
Deal found 1/7£457

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 6 July 2026.

Round-trip from

£446

One-way from

£359

Popular in

March

Cheapest in

February

Average price

£574

Good round-trip deal

£536 or less
Delta
  • Delta
  • 20/10-3/11
  • 4 total stops
  • 34h 31m total
  • Ireland to Washington, D.C.
Search Deals
Aer Lingus
  • Aer Lingus
  • 30/9
  • 1 total stop
  • 12h 50m total
  • Ireland to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (£5 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 6 July 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 20/10

05:55-17:33

2 stops16h 38m

Washington, D.C. Dulles Intl

Tue 3/11

10:07-09:00

2 stops17h 53m

£446

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Wed 21/10

05:55-23:11

2 stops22h 16m

Washington, D.C. Dulles Intl

Wed 4/11

21:30-18:25

1 stop15h 55m

£448

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Fri 28/8

19:50-17:00

2 stops26h 10m

Washington, D.C. Dulles Intl

Thu 17/9

20:20-18:20

1 stop17h 00m

£453
Fastest return journey

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Tue 20/10

08:55-15:35

1 stop11h 40m

Washington, D.C. Dulles Intl

Tue 10/11

12:30-14:30

2 stops21h 00m

£454

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Fri 23/10

09:15-23:11

2 stops18h 56m

Washington, D.C. Dulles Intl

Fri 6/11

10:07-07:45

1 stop16h 38m

£454

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Fri 28/8

18:55-19:40

1 stop29h 45m

Washington, D.C. Dulles Intl

Fri 4/9

17:45-17:50

1 stop19h 05m

£456

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Sun 4/10

05:55-17:46

2 stops16h 51m

Washington, D.C. Dulles Intl

Sat 17/10

18:25-15:25

2 stops16h 00m

£458

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Sat 10/10

05:55-23:11

2 stops22h 16m

Washington, D.C. Dulles Intl

Sat 17/10

12:30-08:15

2 stops14h 45m

£459
Cheapest one-way
Fastest single journey

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Wed 30/9

12:30-20:20

1 stop12h 50m

£359

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Thu 13/8

10:40-11:35

1 stop29h 55m

£490

Flights are sorted by cheapest return flights first.

Deals found on 4/7

Showing 1-10 of 18 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 £274). Flying from Ireland to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £429). 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 6 July 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 6 July 2026.

The most flights from IE0 to IAD are scheduled on a Monday (15 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (10 on average).

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

About 15% of weekly flights between Ireland and Washington, D.C. have experienced delays in the past year, with the average delay time being 157 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 14% of flights being delayed.

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

Booking 34 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 6 July 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
9,940 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,940 reviews
United Airlines
7.4
Good
9,940 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Aer Lingus
7.3
Good
1,647 reviews
United Airlines
7.4
Good
9,940 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Lufthansa
6.8
Okay
8,117 reviews
United Airlines
7.4
Good
9,940 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 £446, Delta can have you in Washington, D.C. Dulles Intl Airport from Ireland in 16h 38m. 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: Qatar Airways (87%), American Airlines (85%), Aer Lingus( 85%).

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

    On average you can expect to pay £1,287 for a flight from Ireland to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £435 while the most popular route, (Dublin - Washington, D.C. Dulles Intl) is currently priced at £514.

  • 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 £274). Flying from Ireland to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £429). 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
Gaithersburg
Oxon Hill
Hanover
Woodbridge
Alexandria
Sterling

Browse thousands of different options on Cheapflights for your next trip

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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 6 July 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£297Average£416FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£336Average£600FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Aer LingusCheapest£342Average£454FlexibilityNo 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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