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Cheap flights from Islip to St Louis (ISP - STL)

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How to find the cheapest flight from
Islip (ISP) to St Louis (STL)

What is the cheapest day to fly round-trip from Islip to St Louis?

Thursday flights are generally found to be more expensive for flights from Islip to St Louis. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to St Louis.

How far in advance should I book a flight from Islip to St Louis?

Users have found that booking a flight from Islip to St Louis at least 31 days early can save you up to 96% on average compared to booking a flight this week. If booking 31 days before your flight isn’t an option for you, users have found flights from Islip to St Louis for as little as $374 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $553 for flights departing within the next 3 days.

What is the cheapest month to fly from Islip to St Louis?

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, August can be a great choice for travel to St Louis. Flights to St Louis from Islip in August are about $266 on average during August, but can be found for as low as $158.

When is the cheapest time to fly from Islip to St Louis (ISP - STL)?

Unlike in the morning, when flights are generally more expensive, you can save up to 5% on flights from Islip to St Louis by exploring options for tickets at noon.

Cheap flights from Islip to St Louis in December, January 2021

The best prices found for ISP to STL flights for December, January
15 Jan - 18 Jan
$142pp
ISP
Islip Long Island
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
 
1 STOP
ISP
Islip Long Island
15 Jan - 18 Jan
$204pp
ISP
Islip Long Island
American Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
   
2 STOPS
ISP
Islip Long Island
23 Dec - 27 Dec
$206pp
ISP
Islip Long Island
American Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
 
1 STOP
ISP
Islip Long Island

Islip to St Louis 2021 flight deals

Cheap flights to St Louis from Islip found for this year
23 Dec - 27 Dec
$206pp
ISP
Islip Long Island
American Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
 
1 STOP
ISP
Islip Long Island
18 Dec - 20 Dec
$303pp
ISP
Islip Long Island
American Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
   
2 STOPS
ISP
Islip Long Island
18 Dec - 20 Dec
$305pp
ISP
Islip Long Island
American Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
 
1 STOP
ISP
Islip Long Island

Related info for your journey

Useful info, stats and facts about Islip to St Louis flights.

Flight FAQs

From Islip to St Louis

Are flight prices decreasing from Islip to St Louis due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Islip and St Louis for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Which airlines flying from Islip Long Island to Lambert-St Louis have flexible cancellations due to COVID-19?

Some of our airline partners flying from Islip Long Island to Lambert-St Louis have new flexible policies in place due to COVID-19. Frontier and American Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like Frontier with this kind of flexibility.

Can I find flights from Islip to St Louis for under $200 on Cheapflights?

Yes, there are multiple flights from Islip to St Louis for under $200. The cheapest flight booked recently is on Multiple Airlines for just $142, but on average you can expect to pay $322.

Are there nonstop flights from Islip to St Louis for under $100 on Cheapflights?

There are no nonstop flights from Islip to St Louis, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

Does it rain more in Islip or St Louis?

The rainfall in Islip is generally less than the rainfall in St Louis. This will continue over the next 14 days.

Is Islip weather warmer or cooler than St Louis?

We forecast the temperature to be around the 90 °F's in July, on average. The temperature in St Louis is generally hotter than in Islip. Book flights in a timely manner in correlation to your departure date.

How long is the flight from Islip to St Louis?

For as low as $303, American Airlines can have you in St Louis from Islip in 4h 52m.

What is the cheapest airline to fly from Islip to St Louis round-trip?

American Airlines, at $204, was found to be the cheapest airline from Islip to St Louis..

Alternative routes for Islip to St Louis

Destination information for St Louis

Things to know before you go. Useful info for your trip from Islip to St Louis
Average temperature for December in St Louis
46.4 °F
Avg rainfall for December in St Louis
2.5 ″

Airports servicing Islip

Airports servicing St. Louis

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