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Flights from Washington D.C. to Islip

Find the cheapest flights from Washington D.C. to Islip within the next three months. Book one-way flights from IDR 1,272,366 or return tickets from IDR 2,920,605.

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Flight Information from Washington D.C. to Islip

The distance between Washington D.C. and Islip is about 397.38km. The most popular month to Islip is July. The off-season for travel is September.

Cheapest one-way flight priceIDR 1,272,366
Cheapest return ticket priceIDR 2,920,605
Off-season travel monthSeptember
Peak season for travelJuly
Flight distance397.38km

Find the best time to fly from Washington D.C. to Islip

The cheapest time for Washington D.C. to Islip flights: Oct 30 to Nov 5 — one way flight prices from IDR 1,272,366.

Cheapest flights
From price
Search
  • 2329

  • Nov

    305
  • 612
  • 1319
  • 2026

  • Dec

    273
  • 410
  • 1117
  • 1824
  • 2531

  • Jan

    17
  • 814
Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

FAQ

  • When is the best time to book flights from Washington D.C. to Islip?

    By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Washington D.C. to Islip is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • The cheapest months to fly from Washington D.C. to Islip is September, when demand for travel is lower.
  • After crunching the numbers on our October flight calendar, it's currently cheapest to fly from Washington D.C. to Islip on October 30, 2025 with Frontier Airlines, with prices starting at IDR 2,920,604.
  • The time difference between Islip and Washington D.C. is 0h.
  • Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

How to find a cheap flight from Washington D.C. to Islip

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Washington D.C. to Islip. Book your flights at the right time and save more.
1
Be flexible with your travel dates to get the cheapest flight from Washington D.C. to Islip.
Simply tap "Date" on the flight search bar to browse through the calendar and check out airfare from Washington D.C. to Islip over the next 6 months in 2025. If you're planning to fly within the next three months, it looks like the most affordable option is on Sun, Nov 2, with one-way flights priced at just IDR 1272366.
2
Compare cheap flight deals from Washington D.C. to Islip across hundreds of airlines.
With our extensive search, you can compare prices from over 500 airlines to find the cheapest flight tickets from Washington D.C. to Islip. The cheapest airline for this route is Frontier Airlines.
3
Set up a Price Alert
By setting up a Price Alert for your journey from Washington D.C. to Islip, you can easily keep an eye on ticket prices without having to check every day.
4
Don't miss out on cheap flight deals and promo codes from Washington D.C. to Islip.
You can always find the latest offers through Trip.com Deals and Promo Codes for cheap flights. By signing up for a free membership, you'll get access to even more deals for your flights.
5
Book early or wait until the last minute.
It's usually best to book early. Flight tickets are often cheapest when they're first released, typically about a year before the departure date. So, have a look online as soon as the flights you're interested in become available. If you miss the cheapest time, you might still find some good deals as the departure date gets closer.
6
Search for flights on the go.
For the best travel flight booking experience, download the Trip.com app. You can search for cheap flights from Washington D.C. to Islip and snag some exclusive deals just for you.

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