$83 Cheap Flights from Islip (ISP) to Washington (DCA)

View $83 flight on Wed, Sep 10, 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 $83 for one-way flights and $165 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Wed, Oct 1 - Mon, Oct 6
ISP
Islip
DCA
Washington
$165 Roundtrip, found 3 days ago
$165
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Wed, Oct 1 from Islip to Washington, returning Mon, Oct 6, priced at $165 found 3 days ago
Southwest Airlines
Wed, Aug 13 - Sat, Aug 16
ISP
Islip
DCA
Washington
$178 Roundtrip, found 3 days ago
$178
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Wed, Aug 13 from Islip to Washington, returning Sat, Aug 16, priced at $178 found 3 days ago
Southwest Airlines
Tue, Aug 19 - Wed, Aug 20
ISP
Islip
DCA
Washington
$184 Roundtrip, found 2 days ago
$184
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Tue, Aug 19 from Islip to Washington, returning Wed, Aug 20, priced at $184 found 2 days ago
Southwest Airlines
Tue, Aug 19 - Wed, Aug 20
ISP
Islip
DCA
Washington
$189 Roundtrip, found 2 days ago
$189
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Tue, Aug 19 from Islip to Washington, returning Wed, Aug 20, priced at $189 found 2 days ago
Southwest Airlines
Wed, Oct 1 - Mon, Oct 6
ISP
Islip
DCA
Washington
$195 Roundtrip, found 3 days ago
$195
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Wed, Oct 1 from Islip to Washington, returning Mon, Oct 6, priced at $195 found 3 days ago
Southwest Airlines
Sun, Aug 24 - Wed, Aug 27
ISP
Islip
DCA
Washington
$198 Roundtrip, found 2 days ago
$198
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Sun, Aug 24 from Islip to Washington, returning Wed, Aug 27, priced at $198 found 2 days ago
Southwest Airlines
Tue, Aug 5 - Thu, Aug 7
ISP
Islip
DCA
Washington
$204 Roundtrip, found 3 days ago
$204
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Tue, Aug 5 from Islip to Washington, returning Thu, Aug 7, priced at $204 found 3 days ago
JetBlue Airways
Wed, Oct 1 - Mon, Oct 6
ISP
Islip
DCA
Washington
$206 Roundtrip, found 3 days ago
$206
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Wed, Oct 1 from Islip to Washington, returning Mon, Oct 6, priced at $206 found 3 days ago
Southwest Airlines
Sun, Aug 24 - Wed, Aug 27
ISP
Islip
DCA
Washington
$208 Roundtrip, found 2 days ago
$208
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Sun, Aug 24 from Islip to Washington, returning Wed, Aug 27, priced at $208 found 2 days ago
Southwest Airlines
Wed, Aug 13 - Sat, Aug 16
ISP
Islip
DCA
Washington
$209 Roundtrip, found 3 days ago
$209
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Wed, Aug 13 from Islip to Washington, returning Sat, Aug 16, priced at $209 found 3 days ago

Alternative airports near Washington

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

Select flight to Baltimore Washington Intl. Thurgood Marshall BWI. Average driving time to city center is 40 minutes. Flights from $361
BWI
Baltimore Washington Intl. Thurgood Marshall
Average driving time to city center40 min
Flights from $361
Select flight to Washington Dulles Intl. IAD. Cheapest option available. Average driving time to city center is 36 minutes. Flights from $284
IAD
Washington Dulles Intl.
Cheapest
Average driving time to city center36 min
Flights from $284
Flights from Islip (ISP) to Washington (DCA)
Origin airport
MacArthur
Destination airport
Ronald Reagan Washington National
Airlines serving
JetBlue Airways, Southwest Airlines
Roundtrip price
$164
Distance
248 mi

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 October. 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 $83 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.

 

Frequently asked questions

How much does a flight from MacArthur Airport (ISP) to Ronald Reagan Washington National Airport (DCA) cost?
Discover the latest flight deals from ISP to DCA by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from ISP to DCA?
The cheapest flights from ISP to DCA are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
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 ISP to DCA?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from ISP to DCA. Sort your results by "Price (lowest to highest)" to snap up a great deal.
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.

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*Available to One Key members.