Cheap flights from Islip, New York to Washington, D.C. from $82

The month of November is, on average, the cheapest month to fly to Washington, D.C. from Islip, New York, with most prices found around $0. If you’re not able to fly to Washington, D.C. in November, then February is your next best option. Flight prices from Islip, New York to Washington, D.C. during February average around $0.

On average, the least expensive day to fly to Washington, D.C. from Islip, New York is on a Friday. momondo users have found tickets for Friday departures for as low as $368. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Islip, New York to Washington, D.C. for around $447.

At noon is the cheapest time of day to fly from Islip, New York to Washington, D.C. when you can find flight prices for as low as $385. Flying to Washington, D.C. at noon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the evening because they tend to be around $464. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Islip Long Island to Baltimore/Washington for the best Islip Long Island - Washington, D.C. flight prices

There is only 1 cabin class available to choose from on Islip, New York to Washington, D.C. flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 15% on your flight if you consider stops on a Islip, New York to Washington, D.C. flight.

Southwest is the most popular carrier operating from Islip Long Island to Washington, D.C.

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Washington, D.C. from Islip, New York according to our data. United Airlines is the first choice among our users, with 54% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 5 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.

The number of flights available between Islip, New York and Washington, D.C. is 1 per day as of September 2026. The most frequent departure time is 6:00AM, with 45% of daily flights leaving at noon.

As of September 2026, there are 11 flights per week flying from Islip, New York to Washington, D.C.. The most common day of the week flights depart is Mon, with 36% of flights taking off on this day.