AU$ 270 Cheap Flights from Manassas to Islip

FAQ

FAQs for flights from Manassas to Islip when there’s no local airport. Departures and arrivals are through Washington D.C. to Islip.

• 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.

• When are flight tickets from Washington D.C. (WAS) to Islip (ISP) the cheapest?

  The cheapest months to fly from Washington D.C. to Islip is September, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Washington D.C. to Islip on?

  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 AU$ 269.

• Is there any time difference between Washington D.C. and Islip?

  The time difference between Islip and Washington D.C. is 0h.

• How do I change or cancel my ticket from Washington D.C. to Islip?

  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.