Trip.com
>
Flights
>
Flights to United States
>
Flights to Missouri
>
Flights to St. Louis
Hotels in St. Louis
>
Flights from Islip to St. Louis

Cheap flight deals from Islip to St. Louis

Here are our top budget-friendly flights, offering flexible one-way or round-trip options. Additional flights with other timings and airlines are also available.

  • Round-trip
  • One way

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

When is the cheapest time to fly from Islip to St. Louis?

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights
From price
Search
  • 11 18
  • 18 25

  • Jun

    25 1
  • 1 8
  • 8 15
  • 15 22
  • 22 29

  • Jul

    29 6
  • 6 13
  • 13 20
  • 20 27

  • Aug

    27 3
Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • When are flight tickets from Islip (ISP) to St. Louis (STL) the cheapest?

    Airlines adjust prices for flights from Islip to St. Louis based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Islip (ISP) to St. Louis (STL) cost?

    According to Trip.com's data, the lowest price is around PHP 11,029.

How to find a cheap flight from Islip to St. Louis

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 Islip to St. Louis. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flying from Islip to St. Louis

Off-season for travel March
Peak season for travel February
Flight distance 1,478.87 km
Popular airline Jetblue Airways

More Travel Options

  • Popular Routes to St. Louis
  • Popular Airlines to St. Louis
  • Popular Flights From Islip
  • Popular St. Louis Hotels