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 is the cheapest time of day to fly from NIR to DCA?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Northern Ireland to Washington, D.C. Reagan-National Airport as you normally would.

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

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

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

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

Yes. Cheapflights offers flight deals from Northern 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.

$591+ Flights from Northern Ireland to Washington, D.C. Reagan-National Airport

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Cheap flight deals from Northern Ireland to Reagan-National

Cheapest flights from Northern Ireland to Reagan-National
Explore the most affordable flight options available from Northern Ireland to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on janeiro 28, 2026.

qui 2/1210:40 am

BHD

DCA

2 stops17h 20m

British Airways

seg 2/166:23 am

DCA

BHD

2 stops21h 42m

British Airways

Deal found 1/25

$766

qui 2/511:05 am

BHD

DCA

2 stops15h 59m

British Airways

seg 2/93:30 pm

DCA

BHD

2 stops17h 45m

British Airways

Deal found 1/25

$796

Best flights from Northern Ireland to Reagan-National
Discover carefully curated flight deals from Northern Ireland to Reagan-National that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated janeiro 28, 2026.

qui 2/1210:40 am

BHD

DCA

2 stops17h 20m

British Airways

seg 2/166:23 am

DCA

BHD

2 stops21h 42m

British Airways

Deal found 1/25

$766

Last-minute flights from Northern Ireland to Reagan-National
Discover last-minute flight deals from Northern Ireland to Reagan-National. Data last updated janeiro 28, 2026 and is based on user searches.

qui 2/511:05 am

BHD

DCA

2 stops15h 59m

British Airways

seg 2/93:30 pm

DCA

BHD

2 stops17h 45m

British Airways

Deal found 1/25

$796

qui 2/1210:40 am

BHD

DCA

2 stops17h 20m

British Airways

seg 2/166:23 am

DCA

BHD

2 stops21h 42m

British Airways

Deal found 1/25

$766

One-way flights from Northern Ireland to Reagan-National
Search for one-way flight options from Northern Ireland to Reagan-National. Find affordable one-way fares based on user searches. Data last updated janeiro 28, 2026.

sex 3/136:30 am

BFS

DCA

2 stops17h 15m

Multiple Airlines

Deal found 1/27

$591

Find flight deals from Northern Ireland to Reagan-National

Round-trip from	$766 (British Airways)
One-way from	$591 (Booking.com)

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

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

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

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Fly to

Route

Depart

Return

Price

BelfastWashington, D.C.

BHD - DCA

BHDDCA

Belfast City

qui 2/12

10:40 am-11:00 pm

2 stops17h 20m

Washington, D.C. Reagan-National

seg 2/16

6:23 am-9:05 am

2 stops21h 42m

$766

BelfastWashington, D.C.

BFS - DCA

BFSDCA

Belfast Intl

sex 3/13

6:30 am-7:45 pm

2 stops17h 15m

$591

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

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

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

Estimated round-trip price

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

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Related info for your journey

How long is the flight from Northern Ireland to Washington, D.C. Reagan-National Airport?
For as low as $766, British Airways can have you in Washington, D.C. Reagan-National Airport from Northern Ireland in 17h 20m. The distance between Northern Ireland and Washington, D.C. Reagan-National Airport is about 3378 mi.
Can I find deals for flights from Northern Ireland to Reagan-National that include hotel bookings?
Yes. In addition to deals on Northern Ireland to Reagan-National flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Northern 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 Northern Ireland to Reagan-National.
Can I find deals for business class flights from Northern Ireland to Reagan-National?
Yes. Cheapflights offers flight deals from Northern 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.

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$591+ Cheap flights from Northern 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 3/13. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Northern Ireland to Reagan-National with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Northern Ireland to Reagan-National

Cheapest flights from Northern Ireland to Reagan-NationalExplore the most affordable flight options available from Northern Ireland to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on janeiro 28, 2026.

Explore the most affordable flight options available from Northern Ireland to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on janeiro 28, 2026.

Find flight deals from Northern Ireland to Reagan-National

Keep the following information in mind while searching for Northern Ireland to Reagan-National flight deals. Data was last updated janeiro 28, 2026.

Round-trip from

One-way from

Cheapflights Fare Finder

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

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

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

Cheapflights Insights

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

Related info for your journey

Find useful and relevant information for your journey from Northern 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 Northern Ireland to Washington, D.C. Reagan-National Airport?

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

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

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

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Cheapest flights from Northern Ireland to Reagan-National
Explore the most affordable flight options available from Northern Ireland to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on janeiro 28, 2026.