What is the cheapest month to book a flight from Ireland to Washington, D.C. Reagan-National Airport?

Currently, February is the cheapest month in which you can book a flight from Ireland to Washington, D.C. Reagan-National Airport (average of $278). Flying from Ireland to Washington, D.C. Reagan-National Airport in March is currently the most expensive (average of $335). 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.

In terms of precipitation, rainfall in Washington, D.C. Reagan-National Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Reagan-National Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Reagan-National 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

What are the most popular routes from Ireland to Washington, D.C. Reagan-National Airport?

When deciding which route to take from Ireland to Washington, D.C. Reagan-National Airport consider Dublin - Washington, D.C. Reagan-National, Cork - Washington, D.C. Reagan-National or Shannon - Washington, D.C. Reagan-National as they are the most popular.

How far in advance should I book a flight from Ireland to Washington, D.C. Reagan-National Airport?

Travelers have found it’s best to book a flight 58 days in advance to save up to 57% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 58 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Ireland to Washington, D.C. Reagan-National Airport 1-2 weeks in advance for as low as $536, or $625 for flights within the next 24 hours.

What is the cheapest month to fly from Ireland to Washington, D.C. Reagan-National Airport?

The best pricing can be found in the month of January. Prices to Washington, D.C. Reagan-National Airport from Ireland average $573. You can even find prices in January for less than $573, as users have found deals to Washington, D.C. Reagan-National Airport from as low as $271. The month of August appears to be one of the more expensive times to travel to Washington, D.C. Reagan-National Airport from Ireland. Flying in the targeted month can save you up to 35%.

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

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

Can I find deals for flights from Ireland to Reagan-National that include hotel bookings?

Yes. In addition to deals on Ireland to Reagan-National flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Ireland to Reagan-National?

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

Can I find deals for business class flights from Ireland to Reagan-National?

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

$399+ Flights from Ireland to Washington, D.C. Reagan-National Airport

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Cheap flight deals from Ireland to Reagan-National

Round-trip from	$437 (Air Canada)
One-way from	$399 (Expedia)
Popular in	August
Cheapest in	January
Average price	$509

From Ireland to Washington, D.C. Reagan-National

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One-way flight from Ireland to Washington, D.C. Reagan-National

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Highest demand for flights based on searches. 13% potential increase in price ($88 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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Find flight deals from Ireland to Reagan-National

Cheapest flights from Ireland to Reagan-National
Explore the most affordable flight options available from Ireland to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Wed 11/265:10 amDUB - DCA

2 stops15h 21mMultiple Airlines

Tue 2/2411:05 amDCA - DUB

2 stops15h 05mMultiple Airlines

Deal found 9/14

$437

Tue 11/115:00 amDUB - DCA

2 stops15h 31mMultiple Airlines

Sun 11/1611:05 amDCA - DUB

2 stops15h 05mMultiple Airlines

Deal found 9/14

$438

Mon 9/229:20 amDUB - DCA

1 stop11h 31mUnited Airlines

Sun 10/512:00 pmDCA - DUB

1 stop16h 45mUnited Airlines

Deal found 9/15

$443

Tue 11/111:25 pmDUB - DCA

2 stops14h 31mDelta

Sun 11/165:03 pmDCA - DUB

1 stop10h 42mDelta

Deal found 9/15

$446

Tue 10/288:50 amDUB - DCA

2 stops18h 09mDelta

Tue 11/46:45 pmDCA - DUB

1 stop9h 35mDelta

Deal found 9/13

$447

Wed 10/291:25 pmDUB - DCA

2 stops14h 27mDelta

Wed 11/54:50 pmDCA - DUB

2 stops14h 50mDelta

Deal found 9/14

$448

Mon 9/229:20 amDUB - DCA

1 stop11h 31mAir Canada

Sun 10/512:55 pmDCA - DUB

2 stops14h 20mAir Canada

Deal found 9/15

$449

Tue 10/211:20 pmDUB - DCA

2 stops14h 44mDelta

Tue 10/286:45 pmDCA - DUB

1 stop10h 35mDelta

Deal found 9/15

$450

Fri 12/59:00 amDUB - DCA

1 stop15h 45mAir Canada

Wed 1/78:40 pmDCA - DUB

1 stop29h 30mAir Canada

Deal found 9/14

$451

Fri 12/511:30 amDUB - DCA

1 stop9h 34mAmerican Airlines

Mon 1/51:44 pmDCA - DUB

1 stop13h 56mAmerican Airlines

Deal found 9/14

$456

Sat 9/209:20 amDUB - DCA

1 stop11h 31mUnited Airlines

Fri 9/268:00 pmDCA - DUB

1 stop32h 45mUnited Airlines

Deal found 9/13

$457

Sun 9/219:30 amSNN - DCA

1 stop32h 29mUnited Airlines

Sun 9/285:27 pmDCA - SNN

1 stop11h 48mUnited Airlines

Deal found 9/13

$491

Best flights from Ireland to Reagan-National
Discover carefully curated flight deals from Ireland to Reagan-National that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2025.

Tue 11/115:00 amDUB - DCA

2 stops15h 31mMultiple Airlines

Sun 11/1611:05 amDCA - DUB

2 stops15h 05mMultiple Airlines

Deal found 9/14

$438

Thu 9/259:20 amDUB - DCA

1 stop11h 31mUnited Airlines

Sat 10/43:27 pmDCA - DUB

1 stop10h 53mUnited Airlines

Deal found 9/15

$443

Wed 11/261:25 pmDUB - DCA

2 stops14h 31mDelta

Tue 2/245:00 pmDCA - DUB

1 stop10h 45mDelta

Deal found 9/13

$446

Wed 2/115:55 amDUB - DCA

2 stops18h 14mDelta

Wed 2/185:00 pmDCA - DUB

1 stop10h 45mDelta

Deal found 9/13

$446

Thu 10/305:55 amDUB - DCA

2 stops17h 45mDelta

Thu 11/64:50 pmDCA - DUB

1 stop11h 30mDelta

Deal found 9/15

$446

Sun 9/219:30 amSNN - DCA

1 stop32h 29mUnited Airlines

Sun 9/285:27 pmDCA - SNN

1 stop11h 48mUnited Airlines

Deal found 9/13

$491

Thu 10/305:55 amDUB - DCA

2 stops17h 45mDelta

Wed 11/54:50 pmDCA - DUB

2 stops14h 50mDelta

Deal found 9/14

$448

Thu 3/56:00 amORK - DCA

2 stops15h 32mDelta

Mon 3/95:15 pmDCA - ORK

2 stops15h 40mDelta

Deal found 9/12

$487

Wed 10/226:00 amORK - DCA

2 stops17h 59mDelta

Fri 10/317:35 pmDCA - ORK

2 stops17h 10mDelta

Deal found 9/13

$616

Last-minute flights from Ireland to Reagan-National
Discover last-minute flight deals from Ireland to Reagan-National. Data last updated September 15, 2025 and is based on user searches.

Sat 9/209:20 amDUB - DCA

1 stop11h 31mUnited Airlines

Fri 9/268:00 pmDCA - DUB

1 stop32h 45mUnited Airlines

Deal found 9/13

$457

Sun 9/219:30 amSNN - DCA

1 stop32h 29mUnited Airlines

Sun 9/285:27 pmDCA - SNN

1 stop11h 48mUnited Airlines

Deal found 9/13

$491

Mon 9/229:20 amDUB - DCA

1 stop11h 31mUnited Airlines

Sun 10/512:00 pmDCA - DUB

1 stop16h 45mUnited Airlines

Deal found 9/15

$443

Mon 9/229:20 amDUB - DCA

1 stop11h 31mAir Canada

Sun 10/512:55 pmDCA - DUB

2 stops14h 20mAir Canada

Deal found 9/15

$449

Tue 10/211:20 pmDUB - DCA

2 stops14h 44mDelta

Tue 10/286:45 pmDCA - DUB

1 stop10h 35mDelta

Deal found 9/15

$450

Wed 10/226:00 amORK - DCA

2 stops18h 33mDelta

Fri 10/316:45 pmDCA - ORK

2 stops18h 00mDelta

Deal found 9/15

$616

Tue 10/288:50 amDUB - DCA

2 stops18h 09mDelta

Tue 11/46:45 pmDCA - DUB

1 stop9h 35mDelta

Deal found 9/13

$447

Tue 10/289:30 amDUB - DCA

1 stop12h 53mUnited Airlines

Tue 11/43:00 pmDCA - DUB

1 stop11h 30mUnited Airlines

Deal found 9/13

$455

Wed 10/291:25 pmDUB - DCA

2 stops14h 27mDelta

Wed 11/54:50 pmDCA - DUB

2 stops14h 50mDelta

Deal found 9/14

$448

Thu 10/305:55 amDUB - DCA

2 stops17h 45mDelta

Thu 11/64:50 pmDCA - DUB

1 stop11h 30mDelta

Deal found 9/15

$446

Thu 10/309:30 amDUB - DCA

1 stop10h 02mUnited Airlines

Wed 11/511:05 amDCA - DUB

1 stop17h 50mUnited Airlines

Deal found 9/15

$456

Thu 10/309:45 amDUB - DCA

1 stop17h 40mDelta

Wed 11/54:50 pmDCA - DUB

2 stops14h 50mDelta

Deal found 9/15

$459

One-way flights from Ireland to Reagan-National
Search for one-way flight options from Ireland to Reagan-National. Find affordable one-way fares based on user searches. Data last updated September 15, 2025.

Mon 10/1311:30 amDUB - DCA

1 stop16h 26mJetBlue

Deal found 9/15

$399

Sun 10/512:50 pmDUB - DCA

2 stops57h 09mMultiple Airlines

Deal found 9/14

$434

Mon 12/87:40 amDUB - DCA

3 stops38h 19mMultiple Airlines

Deal found 9/15

$445

Fri 11/711:30 amDUB - DCA

1 stop9h 26mMultiple Airlines

Deal found 9/13

$449

Sun 10/59:30 amDUB - DCA

1 stop15h 29mBritish Airways

Deal found 9/13

$453

Mon 11/311:30 amDUB - DCA

1 stop14h 28mMultiple Airlines

Deal found 9/15

$457

Thu 10/911:45 amDUB - DCA

1 stop15h 31mBritish Airways

Deal found 9/12

$458

Mon 12/2911:30 amDUB - DCA

1 stop14h 43mMultiple Airlines

Deal found 9/15

$460

Mon 11/179:40 pmDUB - DCA

3 stops43h 21mMultiple Airlines

Deal found 9/15

$461

Mon 10/69:30 amDUB - DCA

1 stop15h 29mBritish Airways

Deal found 9/15

$467

Wed 10/89:30 amDUB - DCA

1 stop15h 29mMultiple Airlines

Deal found 9/14

$473

Wed 10/297:50 amSNN - DCA

2 stops16h 09mBritish Airways

Deal found 9/13

$643

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

DublinWashington, D.C.

DUB - DCA

DUBDCA

Dublin

Tue 11/11

5:00 am-3:31 pm

2 stops15h 31m

Washington, D.C. Reagan-National

Sun 11/16

11:05 am-7:10 am

2 stops15h 05m

$438

DublinWashington, D.C.

DUB - DCA

DUBDCA

Dublin

Thu 9/25

9:20 am-3:51 pm

1 stop11h 31m

Washington, D.C. Reagan-National

Sat 10/4

3:27 pm-7:20 am

1 stop10h 53m

$443

DublinWashington, D.C.

DUB - DCA

DUBDCA

Dublin

Wed 11/26

1:25 pm-10:56 pm

2 stops14h 31m

Washington, D.C. Reagan-National

Tue 2/24

5:00 pm-8:45 am

1 stop10h 45m

$446

DublinWashington, D.C.

DUB - DCA

DUBDCA

Dublin

Wed 2/11

5:55 am-7:09 pm

2 stops18h 14m

Washington, D.C. Reagan-National

Wed 2/18

5:00 pm-8:45 am

1 stop10h 45m

$446

DublinWashington, D.C.

DUB - DCA

DUBDCA

Dublin

Thu 10/30

5:55 am-7:40 pm

2 stops17h 45m

Washington, D.C. Reagan-National

Thu 11/6

4:50 pm-9:20 am

1 stop11h 30m

$446

DublinWashington, D.C.

DUB - DCA

DUBDCA

Dublin

Thu 10/30

5:55 am-7:40 pm

2 stops17h 45m

Washington, D.C. Reagan-National

Wed 11/5

4:50 pm-12:40 pm

2 stops14h 50m

$448

CorkWashington, D.C.

ORK - DCA

ORKDCA

Cork

Thu 3/5

6:00 am-4:32 pm

2 stops15h 32m

Washington, D.C. Reagan-National

Mon 3/9

5:15 pm-12:55 pm

2 stops15h 40m

$487

ShannonWashington, D.C.

SNN - DCA

SNNDCA

Shannon

Sun 9/21

9:30 am-12:59 pm

1 stop32h 29m

Washington, D.C. Reagan-National

Sun 9/28

5:27 pm-10:15 am

1 stop11h 48m

$491

CorkWashington, D.C.

ORK - DCA

ORKDCA

Cork

Wed 10/22

6:00 am-6:59 pm

2 stops17h 59m

Washington, D.C. Reagan-National

Fri 10/31

7:35 pm-4:45 pm

2 stops17h 10m

$616

DublinWashington, D.C.

DUB - DCA

DUBDCA

Dublin

Sun 10/5

12:50 pm-12:08 pm

3 stops28h 18m

$435

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 20 results

Best time to book a flight from Ireland to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Ireland with our price prediction graph.

Estimated round-trip 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. Reagan-National Airport

No data available for this route at this time. Please check back soon.

Related info for your journey

How long is the flight from Ireland to Washington, D.C. Reagan-National Airport?
For as low as $443, United Airlines can have you in Washington, D.C. Reagan-National Airport from Ireland in 11h 31m. Ireland and Washington, D.C. Reagan-National Airport are separated by a distance of 3381 mi. This flight may include one or multiple stops.
What are the most popular routes from Ireland to Washington, D.C. Reagan-National Airport?
When deciding which route to take from Ireland to Washington, D.C. Reagan-National Airport consider Dublin - Washington, D.C. Reagan-National, Cork - Washington, D.C. Reagan-National or Shannon - Washington, D.C. Reagan-National as they are the most popular.
Can I find deals for flights from Ireland to Reagan-National that include hotel bookings?
Yes. In addition to deals on Ireland to Reagan-National flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ireland to Reagan-National?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ireland to Reagan-National.
Can I find deals for business class flights from Ireland to Reagan-National?
Yes. Cheapflights offers flight deals from Ireland to Reagan-National 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. Reagan-National Airport?
Currently, February is the cheapest month in which you can book a flight from Ireland to Washington, D.C. Reagan-National Airport (average of $278). Flying from Ireland to Washington, D.C. Reagan-National Airport in March is currently the most expensive (average of $335). 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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Linthicum Heights

Fairfax

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$399+ Cheap flights from Ireland to Reagan-National (DCA)

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 10/13. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ireland to Reagan-National with Cheapflights

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Cheap flight deals from Ireland to Reagan-National

Keep the following information in mind while searching for Ireland to Reagan-National flight deals. Data was last updated September 15, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ireland to Reagan-National

Cheapest flights from Ireland to Reagan-NationalExplore the most affordable flight options available from Ireland to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Explore the most affordable flight options available from Ireland to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Ireland to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Ireland with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Ireland to Washington, D.C. Reagan-National Airport

Related info for your journey

Find useful and relevant information for your journey from Ireland to Reagan-National. 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. Reagan-National Airport?

What are the most popular routes from Ireland to Washington, D.C. Reagan-National Airport?

Can I find deals for flights from Ireland to Reagan-National that include hotel bookings?

How can I find direct flights from Ireland to Reagan-National?

Can I find deals for business class flights from Ireland to Reagan-National?

What is the cheapest month to book a flight from Ireland to Washington, D.C. Reagan-National Airport?

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Cheapest flights from Ireland to Reagan-National
Explore the most affordable flight options available from Ireland to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.