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

April is one of the best times of the year to fly to Washington, D.C. Reagan-National Airport from Islip, New York. Prices for April average $243 per person but you can even find prices for as low as $91. The most expensive prices can be found in the month of December. Opting for a April flight can save you 22% on your journey compared to booking in December

Most accurate provider : When it comes to deals on Islip, New York-Washington, D.C. Reagan-National Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Washington, D.C. Reagan-National Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-Washington, D.C. Reagan-National Airport flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Islip, New York-Washington, D.C. Reagan-National Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-Washington, D.C. Reagan-National Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly from for flights from Islip to Washington, D.C. Reagan-National?

Islip Long Island (ISP) is the airport you will fly out of if you book a flight from Islip to Washington, D.C. Reagan-National. You should not have trouble finding flights to Washington, D.C. Reagan-National from Long Island; the airport handles an average of 0 outbound flights to Washington, D.C. Reagan-National per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Islip airport to Washington, D.C. Reagan-National. It is only a 7.2 mi journey to Long Island (ISP) from Islip’s city center.

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

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

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

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

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

Yes. Cheapflights offers flight deals from Islip 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.

$108+ Flights from Islip, NY to Washington, D.C. Reagan-National Airport

Q: How far in advance should I book a flight from Islip, New York to Washington, D.C. Reagan-National Airport?

Users have found that booking a flight from Islip, New York to Washington, D.C. Reagan-National Airport at least 27 days early can save you up to 236% on average compared to booking a flight this week. If booking 27 days before your flight isn’t an option for you, users have found flights from Islip, New York to Washington, D.C. Reagan-National Airport for as little as $296 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $466 for flights departing within the next 3 days.

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1. Tell us where you want to go

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2. Select your favorite providers

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Cheap flight deals from Islip to Reagan-National

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$195 (JetBlue)
One-way from	$108 (JetBlue)
Popular in	December
Cheapest in	April
Average price	$263

Provider with most accurate pricing for Islip Long Island-Washington, D.C. Reagan-National flight deals.

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Provider most trusted by Cheapflights users for Islip Long Island-Washington, D.C. Reagan-National flights.

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From Islip Long Island to Washington, D.C. Reagan-National

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One-way flight from Islip Long Island to Washington, D.C. Reagan-National

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Highest demand for flights based on searches. 13% potential increase in price ($36 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).

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Average for round-trip flights in March 2025

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Find flight deals from Islip to Reagan-National

Cheapest flights from Islip to Reagan-National
Explore the most affordable flight options available from Islip to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

Tue 5/66:00 amISP - DCA

1 stop4h 37mJetBlue

Tue 5/131:59 pmDCA - ISP

1 stop7h 29mJetBlue

Deal found 3/23

$195

Mon 5/125:00 amISP - DCA

1 stop6h 10mSouthwest

Fri 5/161:15 pmDCA - ISP

1 stop9h 15mSouthwest

Deal found 3/24

$372

Best flights from Islip to Reagan-National
Discover carefully curated flight deals from Islip to Reagan-National that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 25, 2025.

Tue 5/66:00 amISP - DCA

1 stop6h 00mJetBlue

Mon 5/123:15 pmDCA - ISP

1 stop6h 13mJetBlue

Deal found 3/23

$195

Mon 5/125:00 amISP - DCA

1 stop6h 10mSouthwest

Fri 5/161:15 pmDCA - ISP

1 stop9h 15mSouthwest

Deal found 3/24

$372

Last-minute flights from Islip to Reagan-National
Discover last-minute flight deals from Islip to Reagan-National. Data last updated March 25, 2025 and is based on user searches.

Tue 4/17:20 amISP - DCA

1 stop9h 15mSouthwest

Sun 4/67:35 amDCA - ISP

1 stop9h 50mSouthwest

Deal found 3/23

$552

Tue 4/87:30 amISP - DCA

1 stop9h 25mSouthwest

Thu 4/101:15 pmDCA - ISP

1 stop9h 15mSouthwest

Deal found 3/23

$408

One-way flights from Islip to Reagan-National
Search for one-way flight options from Islip to Reagan-National. Find affordable one-way fares based on user searches. Data last updated March 25, 2025.

Tue 6/106:00 amISP - DCA

1 stop5h 37mJetBlue

Deal found 3/23

$108

Sun 4/204:20 pmISP - DCA

1 stop6h 15mSouthwest

Deal found 3/23

$404

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Tue 5/6

6:00 am-10:37 am

1 stop4h 37m

Washington, D.C. Reagan-National

Tue 5/13

1:59 pm-9:28 pm

1 stop7h 29m

$195

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Mon 5/12

5:00 am-11:10 am

1 stop6h 10m

Washington, D.C. Reagan-National

Fri 5/16

1:15 pm-10:30 pm

1 stop9h 15m

$372

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Tue 6/10

6:00 am-11:37 am

1 stop5h 37m

$108

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Sun 4/20

4:20 pm-10:35 pm

1 stop6h 15m

$404

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/23

Compare providers for flights from Islip to Reagan-National

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to Reagan-National in March.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Islip, New York-Washington, D.C. Reagan-National Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Washington, D.C. Reagan-National Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-Washington, D.C. Reagan-National Airport flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Islip, New York-Washington, D.C. Reagan-National Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-Washington, D.C. Reagan-National Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Islip 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 Islip to Washington, D.C. Reagan-National Airport

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

Currently, February is the cheapest month in which you can book a flight from Islip, New York to Washington, D.C. Reagan-National Airport (average of $278). Flying from Islip, New York to Washington, D.C. Reagan-National Airport in June is currently the most expensive (average of $345). 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 ISP to DCA?

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

Rainfall in Reagan-National by month

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.

Temperature in Reagan-National by month

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).

Reviews of airlines servicing Reagan-National

Southwest

8.0

Very good

4,272 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Southwest

8.0

Very good

4,272 reviews

Southwest

8.0

Very good

4,272 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

JetBlue

7.3

Good

2,924 reviews

Southwest

8.0

Very good

4,272 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

What airport do you fly from for flights from Islip to Washington, D.C. Reagan-National?
Islip Long Island (ISP) is the airport you will fly out of if you book a flight from Islip to Washington, D.C. Reagan-National. You should not have trouble finding flights to Washington, D.C. Reagan-National from Long Island; the airport handles an average of 0 outbound flights to Washington, D.C. Reagan-National per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Islip airport to Washington, D.C. Reagan-National. It is only a 7.2 mi journey to Long Island (ISP) from Islip’s city center.
What are the cheapest airlines flying from Islip, New York to Washington, D.C. Reagan-National Airport round-trip?
Currently priced at $195, JetBlue will fly you from Islip, New York to Washington, D.C. Reagan-National Airport and back. In addition to JetBlue, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Southwest for as low as $372.
Can I find deals for flights from Islip to Reagan-National that include hotel bookings?
Yes. In addition to deals on Islip to Reagan-National flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Islip to Reagan-National?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Reagan-National.
Can I find deals for business class flights from Islip to Reagan-National?
Yes. Cheapflights offers flight deals from Islip 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 Islip, New York to Washington, D.C. Reagan-National Airport?
Currently, February is the cheapest month in which you can book a flight from Islip, New York to Washington, D.C. Reagan-National Airport (average of $278). Flying from Islip, New York to Washington, D.C. Reagan-National Airport in June is currently the most expensive (average of $345). 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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$108+ Cheap flights from Islip, NY (ISP) 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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Islip 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 Islip to Reagan-National

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Islip to Reagan-National

Cheapest flights from Islip to Reagan-NationalExplore the most affordable flight options available from Islip to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

Explore the most affordable flight options available from Islip to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

Cheapflights Fare Finder

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

Compare providers for flights from Islip to Reagan-National

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to Reagan-National in March.

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

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

Cheapflights Insights

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

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

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

Find hourly flight availability from Islip to Reagan-National. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 25, 2025.

Rainfall in Reagan-National by month

Plan your trip to Reagan-National by taking into account the average rainfall totals by month.

Temperature in Reagan-National by month

Plan your trip to Reagan-National by taking into account the average temperature totals by month.

Reviews of airlines servicing Reagan-National

Related info for your journey

Find useful and relevant information for your journey from Islip to Reagan-National. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Islip to Washington, D.C. Reagan-National?

What are the cheapest airlines flying from Islip, New York to Washington, D.C. Reagan-National Airport round-trip?

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

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

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

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

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Cheapest flights from Islip to Reagan-National
Explore the most affordable flight options available from Islip to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.