$111 Cheap Flights from Islip (ISP) to Washington (DCA)

View $111 flight on Tue, Oct 28, 2025Opens in a new window

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

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Cheap Flights from Islip to Washington (ISP-DCA)

Prices were available within the past 7 days and start at $111 for one-way flights and $221 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Sat, Nov 15 - Tue, Nov 18
ISP
Islip
DCA
Washington
$221 Roundtrip, found 9 hours ago
$221
Roundtrip
found 9 hours ago
Select JetBlue Airways flight, departing Sat, Nov 15 from Islip to Washington, returning Tue, Nov 18, priced at $221 found 9 hours ago
JetBlue Airways
Tue, Nov 11 - Tue, Nov 18
ISP
Islip
DCA
Washington
$232 Roundtrip, found 9 hours ago
$232
Roundtrip
found 9 hours ago
Select JetBlue Airways flight, departing Tue, Nov 11 from Islip to Washington, returning Tue, Nov 18, priced at $232 found 9 hours ago
JetBlue Airways
Sat, Nov 15 - Wed, Nov 19
ISP
Islip
DCA
Washington
$236 Roundtrip, found 9 hours ago
$236
Roundtrip
found 9 hours ago
Select JetBlue Airways flight, departing Sat, Nov 15 from Islip to Washington, returning Wed, Nov 19, priced at $236 found 9 hours ago
JetBlue Airways
Wed, Nov 12 - Tue, Nov 18
ISP
Islip
DCA
Washington
$242 Roundtrip, found 9 hours ago
$242
Roundtrip
found 9 hours ago
Select JetBlue Airways flight, departing Wed, Nov 12 from Islip to Washington, returning Tue, Nov 18, priced at $242 found 9 hours ago
JetBlue Airways
Tue, Nov 11 - Mon, Nov 17
ISP
Islip
DCA
Washington
$243 Roundtrip, found 9 hours ago
$243
Roundtrip
found 9 hours ago
Select JetBlue Airways flight, departing Tue, Nov 11 from Islip to Washington, returning Mon, Nov 17, priced at $243 found 9 hours ago
JetBlue Airways
Tue, Nov 11 - Wed, Nov 19
ISP
Islip
DCA
Washington
$247 Roundtrip, found 9 hours ago
$247
Roundtrip
found 9 hours ago
Select JetBlue Airways flight, departing Tue, Nov 11 from Islip to Washington, returning Wed, Nov 19, priced at $247 found 9 hours ago
JetBlue Airways
Tue, Nov 11 - Wed, Nov 12
ISP
Islip
DCA
Washington
$250 Roundtrip, found 9 hours ago
$250
Roundtrip
found 9 hours ago
Select JetBlue Airways flight, departing Tue, Nov 11 from Islip to Washington, returning Wed, Nov 12, priced at $250 found 9 hours ago
JetBlue Airways
Tue, Oct 21 - Tue, Oct 28
ISP
Islip
DCA
Washington
$252 Roundtrip, found 2 hours ago
$252
Roundtrip
found 2 hours ago
Select JetBlue Airways flight, departing Tue, Oct 21 from Islip to Washington, returning Tue, Oct 28, priced at $252 found 2 hours ago
JetBlue Airways
Wed, Nov 12 - Mon, Nov 17
ISP
Islip
DCA
Washington
$253 Roundtrip, found 9 hours ago
$253
Roundtrip
found 9 hours ago
Select JetBlue Airways flight, departing Wed, Nov 12 from Islip to Washington, returning Mon, Nov 17, priced at $253 found 9 hours ago
Southwest Airlines
Thu, Oct 23 - Sun, Oct 26
ISP
Islip
DCA
Washington
$300 Roundtrip, found 1 day ago
$300
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Thu, Oct 23 from Islip to Washington, returning Sun, Oct 26, priced at $300 found 1 day ago

Frequently asked questions

How much does a flight from MacArthur Airport (ISP) to Ronald Reagan Washington National Airport (DCA) cost?
Grab a cheap one-way flight from $111 or cheap return flight from $221 from MacArthur Airport (ISP) to Ronald Reagan Washington National Airport (DCA) 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 MacArthur Airport (ISP) to Ronald Reagan Washington National Airport (DCA)?
The cheapest month to fly from ISP to DCA is November, when there's less demand. Off-peak season is generally when better flight deals are available between these airports.
Which airlines fly direct from MacArthur Airport (ISP) to Ronald Reagan Washington National Airport (DCA)?
You can't take a direct flight from Islip, NY (ISP-MacArthur) to Ronald Reagan Washington National Airport (DCA). However, you can easily journey to Washington without any layovers by taking off from John F. Kennedy Intl. Airport (JFK).
What is the cheapest airline that flies from MacArthur Airport (ISP) to Ronald Reagan Washington National Airport (DCA)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest ISP to DCA flight.
How many flights per day from MacArthur Airport (ISP) to Ronald Reagan Washington National Airport (DCA)?
You'll need to catch a flight with a layover if you're traveling from MacArthur Airport (ISP) to Ronald Reagan Washington National Airport (DCA). Direct flights don't operate daily on this route. However, simply 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 ISP to DCA?
Usually you'll have the most choice when it comes to flights on a Friday. Tuesdays are often the quietest.* But this can vary based on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from MacArthur Airport (ISP) to Ronald Reagan Washington National Airport (DCA)?
Select a flight from MacArthur Airport (ISP) to Ronald Reagan Washington National Airport (DCA) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures after this time are on average 22% more likely to be canceled.**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 Washington from MacArthur Airport (ISP)?
Baltimore Washington Intl. Thurgood Marshall Airport (BWI) is the only airport in Washington with direct flights from MacArthur Airport (ISP). Consider your options and discover affordable fares on Expedia.
Is it cheaper to buy a plane ticket from MacArthur Airport (ISP) to Ronald Reagan Washington National Airport (DCA) last-minute?
Waiting until right before your break to book your flight from ISP to DCA often results in higher prices. Although you may find some last-minute discounts, they aren't always guaranteed. Keep your travel schedule open to boost your chances of snagging a bargain.
Is it cheaper to book an ISP to DCA flight and hotel package?
Opting for an ISP to DCA flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Pick from our extensive range of stays and then add activities, flights and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from MacArthur Airport (ISP) to Ronald Reagan Washington National Airport (DCA)?
In most instances, you're able to reschedule or cancel your ISP to DCA flight. However, there may be additional charges, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's policies and fees on flight changes, or if you need further information, head to our Customer Service portal.

Travel information

Travel information

Origin airport
MacArthur
Destination airport
Ronald Reagan Washington National
Airlines serving
JetBlue Airways, Southwest Airlines
Roundtrip price
$220
Distance
248 mi

Book with confidence

Book with confidence

Islip to Washington Flights

The cheapest times to fly from Islip to Washington

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 Islip to Washington are during the month of November. You can find some of the cheapest flights from Islip to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Islip to Washington

Sunday is one of the best days to book for cheap flights from Islip to Washington: 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 Islip to Washington

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 Islip to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $111 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 Islip to Washington 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 Islip to Washington 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.

 

Islip to Washington Flights

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*Available to One Key members.