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Reagan-National

$113+ 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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — DCA
nov. 26 — déc. 31
mer. 11/26
mer. 12/3
1 adult, Economy
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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 octobre 27, 2025.

This JetBlue deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 11/121:15 pmISP - DCA
1 stop9h 00mJetBlue
jeu. 11/136:30 amDCA - ISP
1 stop6h 18mJetBlue
Deal found 10/24$308
This JetBlue deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 11/2010:30 amISP - DCA
1 stop7h 05mJetBlue
jeu. 11/2710:45 amDCA - ISP
1 stop7h 16mJetBlue
Deal found 10/27$353
This JetBlue deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 10/312:06 pmISP - DCA
1 stop8h 23mJetBlue
dim. 11/25:35 amDCA - ISP
1 stop6h 17mJetBlue
Deal found 10/24$440
This Southwest deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 11/133:25 pmISP - DCA
1 stop7h 25mSouthwest
dim. 11/1611:55 amDCA - ISP
1 stop10h 40mSouthwest
Deal found 10/26$493
This JetBlue deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 12/1011:50 amISP - DCA
1 stop7h 05mJetBlue
mer. 12/1711:00 amDCA - ISP
1 stop8h 50mJetBlue
Deal found 10/27$502
This Southwest deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 12/281:35 pmISP - DCA
1 stop7h 10mSouthwest
lun. 12/297:30 amDCA - ISP
1 stop9h 35mSouthwest
Deal found 10/26$521
This Southwest deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 11/21:40 pmISP - DCA
2 stops9h 05mSouthwest
mar. 11/116:55 amDCA - ISP
2 stops8h 10mSouthwest
Deal found 10/25$597
This JetBlue deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 11/11:57 pmISP - DCA
1 stop8h 18mJetBlue
lun. 11/36:35 amDCA - ISP
1 stop6h 17mJetBlue
Deal found 10/27$601
This Southwest deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 11/27:00 amISP - DCA
1 stop8h 55mSouthwest
mar. 11/46:55 amDCA - ISP
1 stop5h 35mSouthwest
Deal found 10/24$652

Cheap flight deals from Islip to Reagan-National

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Reagan-National (DCA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated octobre 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$308
(JetBlue)

One-way from

$113
(Trip.com)

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.
Search Deals
Provider most trusted by Cheapflights users for Islip Long Island-Washington, D.C. Reagan-National flights.
Search Deals
From Islip Long Island to Washington, D.C. Reagan-National
Search Deals
One-way flight from Islip Long Island to Washington, D.C. Reagan-National
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($56 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Reagan-National 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 2,558,603 searches. Data last updated octobre 27, 2025.
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

Islip

Fly to

Reagan-National

Route

Depart

Return

Price

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

mer. 11/12

1:15 pm-10:15 pm

1 stop9h 00m

Washington, D.C. Reagan-National

jeu. 11/13

6:30 am-12:48 pm

1 stop6h 18m

$308

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

lun. 1/12

9:15 am-3:45 pm

1 stop6h 30m

Washington, D.C. Reagan-National

ven. 1/16

7:30 am-1:30 pm

1 stop6h 00m

$327

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

jeu. 11/20

10:30 am-5:35 pm

1 stop7h 05m

Washington, D.C. Reagan-National

jeu. 11/27

10:45 am-6:01 pm

1 stop7h 16m

$353

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

sam. 11/15

7:25 am-3:55 pm

1 stop8h 30m

Washington, D.C. Reagan-National

dim. 11/16

11:55 am-10:35 pm

1 stop10h 40m

$493

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

jeu. 11/13

1:40 pm-10:50 pm

2 stops9h 10m

Washington, D.C. Reagan-National

dim. 11/16

11:55 am-10:35 pm

1 stop10h 40m

$499

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

mer. 12/10

11:50 am-6:55 pm

1 stop7h 05m

Washington, D.C. Reagan-National

mer. 12/17

11:00 am-7:50 pm

1 stop8h 50m

$502

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

lun. 1/12

7:30 am-4:34 pm

2 stops9h 04m

Washington, D.C. Reagan-National

ven. 1/16

10:15 am-7:45 pm

2 stops9h 30m

$695

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

dim. 12/28

2:45 pm-10:50 pm

2 stops8h 05m

Washington, D.C. Reagan-National

lun. 12/29

7:30 am-5:05 pm

1 stop9h 35m

$732

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

mar. 1/27

9:40 am-6:00 pm

1 stop8h 20m

$127

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

jeu. 1/22

9:40 am-6:00 pm

1 stop8h 20m

$143

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 17 results
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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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Islip, New York-Washington, D.C. Reagan-National Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, July is the cheapest month in which you can book a flight from Islip, New York to Washington, D.C. Reagan-National Airport (average of $64). Flying from Islip, New York to Washington, D.C. Reagan-National Airport in January is currently the most expensive (average of $208). 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?

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 octobre 27, 2025.

A simple way to save on the total cost of your ticket is to fly from Islip, New York to Washington, D.C. Reagan-National Airport in the afternoon. If you’re flexible enough to do this you can expect to save up to 60% on your trip compared to booking a flight in the morning.

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?

    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.

  • How long is the flight from Islip, New York to Washington, D.C. Reagan-National Airport?

    Departing from Islip, New York to Washington, D.C. Reagan-National Airport will take you 6h 30m. The distance between Islip, New York and Washington, D.C. Reagan-National Airport is about 248 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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, July is the cheapest month in which you can book a flight from Islip, New York to Washington, D.C. Reagan-National Airport (average of $64). Flying from Islip, New York to Washington, D.C. Reagan-National Airport in January is currently the most expensive (average of $208). 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

Traveling to a place near Washington, D.C. Reagan-National Airport?

Book flights to Washington, D.C. Reagan-National Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Springfield
Silver Spring
Hanover
Gaithersburg
Fredericksburg
Fairfax
Linthicum Heights
Falls Church
Owings Mills
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf

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