$118 Cheap Flights from Washington (DCA) to Islip (ISP)

View $118 flight on Tue, Oct 28, 2025Opens in a new window

Popular airlines from Ronald Reagan Washington National Airport (DCA) to MacArthur Airport (ISP)

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Cheap Flights from Washington to Islip (DCA-ISP)

Prices were available within the past 7 days and start at $118 for one-way flights and $213 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Tue, Nov 11 - Mon, Nov 17
DCA
Washington
ISP
Islip
$213 Roundtrip, found 4 days ago
$213
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Tue, Nov 11 from Washington to Islip, returning Mon, Nov 17, priced at $213 found 4 days ago
JetBlue Airways
Tue, Nov 11 - Fri, Nov 14
DCA
Washington
ISP
Islip
$214 Roundtrip, found 4 days ago
$214
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Tue, Nov 11 from Washington to Islip, returning Fri, Nov 14, priced at $214 found 4 days ago
JetBlue Airways
Mon, Oct 27 - Wed, Nov 5
DCA
Washington
ISP
Islip
$223 Roundtrip, found 11 hours ago
$223
Roundtrip
found 11 hours ago
Select JetBlue Airways flight, departing Mon, Oct 27 from Washington to Islip, returning Wed, Nov 5, priced at $223 found 11 hours ago
JetBlue Airways
Tue, Nov 11 - Thu, Nov 13
DCA
Washington
ISP
Islip
$224 Roundtrip, found 4 days ago
$224
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Tue, Nov 11 from Washington to Islip, returning Thu, Nov 13, priced at $224 found 4 days ago
JetBlue Airways
Mon, Sep 15 - Wed, Sep 17
DCA
Washington
ISP
Islip
$231 Roundtrip, found 2 days ago
$231
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Mon, Sep 15 from Washington to Islip, returning Wed, Sep 17, priced at $231 found 2 days ago
JetBlue Airways
Mon, Oct 27 - Wed, Oct 29
DCA
Washington
ISP
Islip
$233 Roundtrip, found 11 hours ago
$233
Roundtrip
found 11 hours ago
Select JetBlue Airways flight, departing Mon, Oct 27 from Washington to Islip, returning Wed, Oct 29, priced at $233 found 11 hours ago
JetBlue Airways
Tue, Sep 9 - Mon, Sep 15
DCA
Washington
ISP
Islip
$236 Roundtrip, found 2 days ago
$236
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Tue, Sep 9 from Washington to Islip, returning Mon, Sep 15, priced at $236 found 2 days ago
JetBlue Airways
Tue, Oct 7 - Wed, Oct 15
DCA
Washington
ISP
Islip
$239 Roundtrip, found 5 days ago
$239
Roundtrip
found 5 days ago
Select JetBlue Airways flight, departing Tue, Oct 7 from Washington to Islip, returning Wed, Oct 15, priced at $239 found 5 days ago
JetBlue Airways
Mon, Nov 17 - Wed, Nov 19
DCA
Washington
ISP
Islip
$243 Roundtrip, found 4 days ago
$243
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Mon, Nov 17 from Washington to Islip, returning Wed, Nov 19, priced at $243 found 4 days ago
Southwest Airlines
Mon, Sep 15 - Tue, Sep 16
DCA
Washington
ISP
Islip
$246 Roundtrip, found 4 days ago
$246
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Mon, Sep 15 from Washington to Islip, returning Tue, Sep 16, priced at $246 found 4 days ago

Alternative airports near Islip

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to MacArthur ISP. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $246
ISP
MacArthur
CheapestClosest
Average driving time to city center14 min
Flights from $246
Flights from Washington (DCA) to Islip (ISP)
Origin airport
Ronald Reagan Washington National
Destination airport
MacArthur
Airlines serving
JetBlue Airways, Southwest Airlines
Roundtrip price
$213
Distance
248 mi

Washington to Islip Flights

The cheapest times to fly from Washington to Islip

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Islip are during the month of November. You can find some of the cheapest flights from Washington to Islip with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Islip

Sunday is one of the best days to book for cheap flights from Washington to Islip: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Islip

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Islip in 2025. You can also book with separate airlines for your outbound and return journeys, from $118 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Islip flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Islip airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Ronald Reagan Washington National Airport (DCA) to MacArthur Airport (ISP) cost?
Snag a cheap one-way flight from $118 or cheap return flight from $213 from Ronald Reagan Washington National Airport (DCA) to MacArthur Airport (ISP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Ronald Reagan Washington National Airport (DCA) to MacArthur Airport (ISP)?
The cheapest month to fly from DCA to ISP is November, when there's less demand. Off-peak months are generally when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Ronald Reagan Washington National Airport (DCA) to MacArthur Airport (ISP)?
To find the cheapest airline flying from DCA to ISP, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Ronald Reagan Washington National Airport (DCA) to MacArthur Airport (ISP)?
You'll have to take a flight with a layover if you're traveling from Ronald Reagan Washington National Airport (DCA) to MacArthur Airport (ISP). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from DCA to ISP?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can vary based on a number of factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Ronald Reagan Washington National Airport (DCA) to MacArthur Airport (ISP)?
To avoid possible delays on the Ronald Reagan Washington National Airport (DCA) to MacArthur Airport (ISP) route, fly before 3 PM. Later flights have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Islip from Ronald Reagan Washington National Airport (DCA)?
You can arrive at any one of these Islip airports after your direct flight from Ronald Reagan Washington National Airport (DCA):

  • LaGuardia Airport (LGA)
  • John F. Kennedy Intl. Airport (JFK)
  • Westchester County Airport (HPN)

Is it cheaper to buy a plane ticket from Ronald Reagan Washington National Airport (DCA) to MacArthur Airport (ISP) last-minute?
Booking your ticket from DCA to ISP just before your getaway is generally more expensive. However, if there's some wiggle room with your departure times and dates, you could land a cheap last-minute fare.
Is it cheaper to book a DCA to ISP flight and hotel package?
Compared with arranging hotels and flights separately, booking a DCA to ISP flight and hotel package with Expedia could result in significant savings. Better still, having everything in one place takes the hassle out of planning your trip. Simply secure your flights and select from our wide range of stays, then customize your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Ronald Reagan Washington National Airport (DCA) to MacArthur Airport (ISP)?
In most cases, you can cancel or modify your DCA to ISP flight. However, additional charges may apply, especially if you booked over 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you want further information, head to our Customer Service portal.

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*Available to One Key members.