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Islip

$154+ Cheap flights from Reagan-National (DCA) to Islip, NY (ISP)

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 7/26. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — ISP
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheap flight deals from Reagan-National to Islip

Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) to Islip (ISP). 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 junio 12, 2025.

Round-trip from

$268
(Southwest)

One-way from

$154
(Southwest)

Popular in

December

Cheapest in

April

Average price

$218
From Washington, D.C. Reagan-National to Islip Long Island
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One-way flight from Washington, D.C. Reagan-National to Islip Long Island
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Highest demand for flights based on searches. 17% potential increase in price ($47 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 June 2025
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Find flight deals from Reagan-National to Islip

Cheapest flights from Reagan-National to Islip
Explore the most affordable flight options available from Reagan-National to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.

This Southwest deal was found by Cheapflights users on 6/10. 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.
mié. 8/2012:50 pmDCA - ISP
1 stop8h 15mSouthwest
mar. 8/265:30 amISP - DCA
1 stop5h 40mSouthwest
Deal found 6/10$268
This JetBlue deal was found by Cheapflights users on 6/12. 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.
sáb. 7/128:12 pmDCA - ISP
1 stop15h 29mJetBlue
lun. 7/1412:55 pmISP - DCA
1 stop22h 05mJetBlue
Deal found 6/12$318
This JetBlue Airways deal was found by Cheapflights users on 6/9. 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 Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/148:00 pmDCA - ISP
1 stop14h 51mMultiple Airlines
vie. 8/152:19 pmISP - DCA
1 stop18h 20mMultiple Airlines
Deal found 6/9$566
This Vliegwinkel deal was found by Cheapflights users on 6/9. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/318:30 amDCA - ISP
1 stop4h 54mAlaska Airlines
lun. 8/44:33 pmISP - DCA
1 stop4h 26mAlaska Airlines
Deal found 6/9$798

Cheapflights Fare Finder

Customize your flight search to find flights from Reagan-National to Islip 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 junio 12, 2025.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Islip that are best for you.

Fly from

Reagan-National

Fly to

Islip

Route

Depart

Return

Price

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

mié. 8/20

12:50 pm-9:05 pm

1 stop8h 15m

Islip Long Island

mar. 8/26

5:30 am-11:10 am

1 stop5h 40m

$268

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

sáb. 7/12

8:12 pm-11:41 am

1 stop15h 29m

Islip Long Island

lun. 7/14

12:55 pm-11:00 am

1 stop22h 05m

$318

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

jue. 8/14

8:00 pm-10:51 am

1 stop14h 51m

Islip Long Island

vie. 8/15

2:19 pm-8:39 am

1 stop18h 20m

$566

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

jue. 7/31

8:30 am-1:24 pm

1 stop4h 54m

Islip Long Island

lun. 8/4

4:33 pm-8:59 pm

1 stop4h 26m

$798

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

dom. 7/27

6:55 am-5:20 pm

2 stops10h 25m

$159

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

lun. 11/3

3:12 pm-1:35 pm

1 stop22h 23m

$169

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

jue. 8/28

10:30 am-3:21 pm

1 stop4h 51m

$354

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

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

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

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Islip, New York (average of $108). Flying from Washington, D.C. Reagan-National Airport to Islip, New York in November is currently the most expensive (average of $213). 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 DCA to ISP?

Find hourly flight availability from Reagan-National to Islip. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated junio 12, 2025.

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

Rainfall in Islip by month

Plan your trip to Islip by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Islip, New York ranges from 3.3 - 4.4 inches per month. March is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Islip, New York when rainfall is around 3.3 in.

Temperature in Islip by month

Plan your trip to Islip by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Islip, New York, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Islip. Reviews last updated junio 12, 2025.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
JetBlue
7.3
Good
2,925 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from Reagan-National to Islip. 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 into for flights to Islip from Washington, D.C. Reagan-National?

    For a flight from Washington, D.C. Reagan-National to Islip, you will be flying into Long Island. Islip Long Island (ISP) is just 7.2 mi from the center of the city. Long Island is the only Islip airport and it handles 0 inbound flights from Washington, D.C. Reagan-National per day. 0 airlines have flights to Islip Long Island from Washington, D.C. Reagan-National on a regular basis.

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

    Cheapflights users have booked flights from Washington, D.C. Reagan-National Airport to Islip, New York round-trip from $268. Other airlines that can offer you cheap pricing are JetBlue, from $318, and Alaska Airlines, from $798.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Reagan-National to Islip 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 Washington, D.C. Reagan-National Airport to Islip, New York?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Islip, New York (average of $108). Flying from Washington, D.C. Reagan-National Airport to Islip, New York in November is currently the most expensive (average of $213). 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
Southampton
Riverhead

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Alternative routes for Reagan-National to Islip

See prices for flight routes from nearby airports that may be better suited for you.
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