Trip.com
>
Flights
>
Flights to United States
>
Flights to New York State
>
Flights to Islip
>
Flights from Manassas to Islip

No flights were found from Manassas to Islip. Instead, check out the deals below for nearby routes from Washington D.C. to Islip.

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

Flight Info | Manassas to Islip

Check out flight details for routes from Washington D.C. to Islip—including distance, duration, and the best value month—to help plan your trip from Manassas to Islip.

Cheapest one-way flight priceDKK 493
Cheapest return ticket priceDKK 1,132
Off-season for travelSeptember
Peak season for travelJuly
Flight distance397.38 km

When is the cheapest time to fly from Manassas to Islip?

Analyze price trends for flights from Washington D.C. to Islip—including distance, duration, and the most cost-effective month—to plan your journey from Manassas to Islip.

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.

Frequently Asked Questions

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.
  • 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 DKK 1,131.
  • The time difference between Islip and Washington D.C. is 0h.
  • Tickets can only be changed or canceled 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 Manassas 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 Manassas to Islip. Book your flights at the right time and save more.
1
Being flexible with your dates to get the cheapest Manassas to Islip ticket.
Tap "Date" on flight search bar to scan through the calender for Manassas to Islip airfare over next 6 months in 2025. If you would like to fly in next 3 months, it seems the cheapest date is on Sun, Nov 2 at DKK 493 for one-way flights.
2
Compare cheap Manassas to Islip flight deals from over hundreds of airlines.
Our extensive search allows you to compare prices from over 500 airlines to choose the cheapest flight tickets from Manassas to Islip. The cheapest airline operating is Frontier Airlines.
3
Set up a Price Alert
By setting up a Price Alert for your Manassas to Islip route, you can easily track the price of your airline tickets from without manually checking every day.
4
Don't miss cheap Manassas to Islip flight deals and promo codes.
You can always get the latest deals through Trip.com Deals and Promo Codes for cheap flights. If registering a free membership, you can receive more deals for your flights.
5
Book early or wait unitl the last minute.
It's always better to book early. Flight tickets tend to be the cheapest when they are first released, normally about a year before the departure date. So, check online as soon as the flights you want become available. If you miss the cheapest time, you can still find lower-priced tickets as the flight date approaches.
6
Search for flights on the go.
To get the best flight booking experience on the go, download Trip.com and search for cheap flight tickets from Manassas to Islip to get exclusive deals for you.

More Travel Options