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 priceCLP 72,282
Cheapest round-trip ticket priceCLP 165,916
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 CLP 165,915.
  • 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
Be flexible with your travel dates to get the cheapest Manassas to Islip ticket.
Tap "Date" in the flight search bar to browse the calendar and find airfare from Manassas to Islip for the next six months in 2025. If you're looking to fly within the next three months, the lowest fare is CLP 72282 for a one-way ticket on Sun, Nov 2.
2
Compare cheap Manassas to Islip flight deals from hundreds of airlines.
Our powerful search system compares prices from over 500 airlines. So you can find the cheapest flights from Manassas to Islip. The most affordable airline currently operating on this route is Frontier Airlines.
3
Set up a Price Alert to track fare drops.
Set up a Price Alert for your Manassas to Islip route to track ticket prices effortlessly—no need to check manually every day.
4
Don't miss out on cheap Manassas to Islip flight deals and promo codes.
Stay updated on the latest deals with Trip.com Deals and Promo Codes for cheap flights. Sign up for a free membership to unlock even more exclusive flight discounts.
5
Book early or wait unitl the last minute to fine the best fares.
It's always better to book early! Airlines typically release their lowest fares about a year before departure, so check as soon as flights become available. If you miss that window, you may still find great deals closer to your travel date.
6
Search for flights on the go.
For the best booking experience on the go, download Trip.com and search for cheap flights from Manassas to Islip to access exclusive deals just for you.