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

For as low as £400, Delta can have you in Washington, D.C. Dulles Intl Airport from Ireland in 11h 40m. Airlines will cover a distance of 3393 mi.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

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

On average you can expect to pay £779 for a flight from Ireland to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £396 while the most popular route, (Dublin - Washington, D.C. Dulles Intl) is currently priced at £401.

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 (89%), American Airlines (82%), Aer Lingus( 82%).

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.

£298+ Cheap Flights from Ireland to Washington, D.C. Dulles Intl Airport

Cheap flight deals from Ireland to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

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 13 September 2026.

Wed 4/1111:30 -

1 stop12h 00m

Fri 27/1119:40 -

1 stop9h 35m

Deal found 11/9£358

Sat 5/1211:00 -

1 stop13h 55m

Wed 9/1218:05 -

1 stop10h 50m

Deal found 12/9£385

Tue 3/1108:50 -

1 stop11h 50m

Mon 23/1121:45 -

1 stop12h 40m

Deal found 11/9£386

Tue 3/1108:50 -

1 stop11h 50m

Wed 25/1118:05 -

1 stop10h 50m

Deal found 11/9£387

Wed 28/1005:45 -

1 stop15h 10m

Wed 4/1118:32 -

1 stop9h 13m

Deal found 13/9£390

Wed 18/1120:40 -

2 stops25h 31m

Wed 2/1221:55 -

1 stop11h 10m

Deal found 11/9£390

Sat 21/1109:55 -

1 stop18h 26m

Wed 2/1218:40 -

1 stop14h 50m

Deal found 11/9£393

Sun 25/1005:45 -

1 stop15h 00m

Sun 1/1117:45 -

1 stop17h 35m

Deal found 11/9£395

Sun 25/1005:45 -

1 stop15h 00m

Sun 1/1121:30 -

1 stop11h 55m

Deal found 12/9£396

Sun 1/1108:55 -

1 stop11h 50m

Sun 8/1122:00 -

1 stop11h 25m

Deal found 12/9£397

Sun 13/1205:45 -

1 stop15h 00m

Thu 31/1210:43 -

2 stops17h 17m

Deal found 9/9£398

Find flight deals from Ireland to Dulles Intl

Round-trip from	£327
One-way from	£298
Popular in	March
Cheapest in	February
Average price	£529
Good round-trip deal	£552 or less
Good one-way deal	£478 or less

Icelandair
8/3-15/3
2 total stops
21h 35m total
Ireland to Washington, D.C.

Search Deals

Delta
1/11-31/12
1 total stop
11h 50m total
Ireland to Washington, D.C.

Search Deals

High demand for flights, 0% potential price rise

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£11 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

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Price to beat on a round-trip flight from Ireland to Washington, D.C. Dulles Intl.

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Price to beat on a one-way flight from Ireland to Washington, D.C. Dulles Intl.

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Cheapflights Fare Finder

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 Dublin - IAD Washington, D.C. Dulles Intl

DUBIAD

Dublin

Fri 13/11

08:50-15:55

1 stop12h 05m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£298

DublinWashington, D.C.

DUB Dublin - IAD Washington, D.C. Dulles Intl

DUBIAD

Dublin

Tue 8/12

05:45-15:45

1 stop15h 00m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£298

DublinWashington, D.C.

DUB Dublin - IAD Washington, D.C. Dulles Intl

DUBIAD

Dublin

Sun 28/2

08:55-15:45

1 stop11h 50m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£299

DublinWashington, D.C.

DUB Dublin - IAD Washington, D.C. Dulles Intl

DUBIAD

Dublin

Mon 1/2

05:45-17:30

2 stops16h 45m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£302

DublinWashington, D.C.

DUB Dublin - IAD Washington, D.C. Dulles Intl

DUBIAD

Dublin

Sun 1/11

05:45-18:33

2 stops16h 48m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£302

DublinWashington, D.C.

DUB Dublin - IAD Washington, D.C. Dulles Intl

DUBIAD

Dublin

Sun 10/1

05:45-15:45

1 stop15h 00m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£328

Fastest return journey

DublinWashington, D.C.

DUB Dublin - IAD Washington, D.C. Dulles Intl

DUBIAD

Dublin

Tue 13/10

08:55-15:35

1 stop11h 40m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£332

DublinWashington, D.C.

DUB Dublin - IAD Washington, D.C. Dulles Intl

DUBIAD

Dublin

Wed 14/10

05:55-19:35

1 stop18h 40m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£336

DublinWashington, D.C.

DUB Dublin - IAD Washington, D.C. Dulles Intl

DUBIAD

Dublin

Thu 17/12

10:45-17:33

1 stop11h 48m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£340

DublinWashington, D.C.

DUB Dublin - IAD Washington, D.C. Dulles Intl

DUBIAD

Dublin

Tue 20/10

08:55-15:35

1 stop11h 40m

Washington, D.C. Dulles Intl

Tue 3/11

18:40-14:30

1 stop14h 50m

£400

Flights are sorted by cheapest return flights first.

Deals found on 9/9

Showing 1-10 of 15 resultsSorted by cheapest first

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.

DUB-IAD

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

IE0-IAD

DUB-IAD

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

Currently, November is the cheapest month in which you can book a flight from Ireland to Washington, D.C. Dulles Intl Airport (average of £355). Flying from Ireland to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £615). 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?

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

The most flights from IE0 to IAD are scheduled on a Saturday (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 13% of weekly flights between Ireland and Washington, D.C. have experienced delays in the past year, with the average delay time being 146 minutes.

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

Historically, flights departing in the evening 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 Sunday 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 12% of flights being delayed.

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

Booking 31 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 a feel of what it's like to fly with United Airlines and Aer Lingus 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

10,215 reviews

Check prices

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

10,215 reviews

United Airlines

7.4

Good

10,215 reviews

Check prices

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

1,758 reviews

United Airlines

7.4

Good

10,215 reviews

Check prices

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

How long is the flight from Ireland to Washington, D.C. Dulles Intl Airport?
For as low as £400, Delta can have you in Washington, D.C. Dulles Intl Airport from Ireland in 11h 40m. Airlines will cover a distance of 3393 mi.
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 (89%), American Airlines (82%), Aer Lingus( 82%).
What are the cheapest flights from Ireland to Washington, D.C. Dulles Intl Airport?
On average you can expect to pay £779 for a flight from Ireland to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £396 while the most popular route, (Dublin - Washington, D.C. Dulles Intl) is currently priced at £401.
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, November is the cheapest month in which you can book a flight from Ireland to Washington, D.C. Dulles Intl Airport (average of £355). Flying from Ireland to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £615). 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.

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Dublin to Baltimore flights

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Belfast Intl to Baltimore flights

Frankfurt to Dulles Intl flights

Leeds to Reagan-National flights

Belfast City to Dulles Intl flights

Top 2 airlines flying from Ireland to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest£331	Average£709	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Aer Lingus	Cheapest£338	Average£454	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights

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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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Cheap flights from Ireland to Washington, D.C. Dulles Intl Airport from £298

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ireland to Dulles Intl

Cheapest flights from Ireland to Dulles IntlExplore 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 13 September 2026.

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 13 September 2026.

Best flights from Ireland to Dulles IntlDiscover carefully curated flight deals from Ireland to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 September 2026.

Discover carefully curated flight deals from Ireland to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 September 2026.

Direct flights from Ireland to Dulles IntlExplore direct flight options from Ireland to Dulles Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 13 September 2026.

Explore direct flight options from Ireland to Dulles Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 13 September 2026.

Last-minute flights from Ireland to Dulles IntlDiscover last-minute flight deals from Ireland to Dulles Intl. Data last updated 13 September 2026 and is based on user searches.

Discover last-minute flight deals from Ireland to Dulles Intl. Data last updated 13 September 2026 and is based on user searches.

One-way flights from Ireland to Dulles IntlSearch for one-way flight options from Ireland to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 13 September 2026.

Search for one-way flight options from Ireland to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 13 September 2026.

Find flight deals from Ireland to Dulles Intl

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One-way from

Popular in

Cheapest in

Average price

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Good one-way deal

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ireland to Washington, D.C. Dulles Intl Airport that are best for you.

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.

Cheapflights Insights

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

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 13 September 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

The most flights from IE0 to IAD are scheduled on a Saturday (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 13% of weekly flights between Ireland and Washington, D.C. have experienced delays in the past year, with the average delay time being 146 minutes.

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

Historically, flights departing in the evening 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 Sunday 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 12% of flights being delayed.

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

Booking 31 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 a feel of what it's like to fly with United Airlines and Aer Lingus 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.

Related info for your journey

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

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

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

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

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ireland to Dulles Intl

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Complete your trip

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Other flights to Dulles Intl

Explore flights to Dulles Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 13 September 2026.

Search flights from Ireland to Dulles Intl by cabin class

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Ireland and Dulles Intl flights

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Top 2 airlines flying from Ireland to Dulles Intl

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

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

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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 13 September 2026.

Best flights from Ireland to Dulles Intl
Discover carefully curated flight deals from Ireland to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 September 2026.

Direct flights from Ireland to Dulles Intl
Explore direct flight options from Ireland to Dulles Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 13 September 2026.

Last-minute flights from Ireland to Dulles Intl
Discover last-minute flight deals from Ireland to Dulles Intl. Data last updated 13 September 2026 and is based on user searches.

One-way flights from Ireland to Dulles Intl
Search for one-way flight options from Ireland to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 13 September 2026.