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Cheap flights from Islip, New York to St. Louis from $81

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to St. Louis departing on 10/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Islip, New York to St. Louis

Cheap round-trip flights

Southwest Logo
6:00 am - 11:30 amISP-STL
6h 30m1 stop
Southwest Logo
7:00 am - 11:55 amSTL-ISP
3h 55m1 stop
$184Southwest
Find Deal
vie., ago. 29 - mar., sep. 2
Southwest Logo
6:00 am - 11:30 amISP-STL
6h 30m1 stop
Southwest Logo
5:25 am - 3:15 pmSTL-ISP
8h 50m2 stops
$189Southwest
Find Deal
vie., ago. 29 - mar., sep. 2
Southwest Logo
3:05 pm - 7:35 pmISP-STL
5h 30m1 stop
Southwest Logo
5:25 am - 12:00 pmSTL-ISP
5h 35m2 stops
$220Southwest
Find Deal
vie., ago. 29 - lun., sep. 1
Southwest Logo
3:05 pm - 10:35 pmISP-STL
8h 30m2 stops
Southwest Logo
5:25 am - 3:15 pmSTL-ISP
8h 50m2 stops
$231Southwest
Find Deal
vie., ago. 29 - mar., sep. 2
Southwest Logo
3:05 pm - 7:35 pmISP-STL
5h 30m1 stop
Southwest Logo
8:10 am - 5:00 pmSTL-ISP
7h 50m1 stop
$239Southwest
Find Deal
vie., ago. 15 - dom., ago. 17
Southwest Logo
3:05 pm - 10:35 pmISP-STL
8h 30m2 stops
Southwest Logo
5:25 am - 12:00 pmSTL-ISP
5h 35m2 stops
$262Southwest
Find Deal
vie., ago. 29 - lun., sep. 1
Southwest Logo
3:05 pm - 10:20 pmISP-STL
8h 15m2 stops
Southwest Logo
8:10 am - 5:00 pmSTL-ISP
7h 50m1 stop
$281Southwest
Find Deal
vie., ago. 15 - dom., ago. 17
Frontier Logo
6:05 am - 1:07 pmISP-STL
8h 02m1 stop
Frontier Logo
2:02 pm - 11:59 pmSTL-ISP
8h 57m1 stop
$296Frontier
Find Deal
jue., ago. 28 - dom., ago. 31
Frontier Logo
6:05 am - 1:07 pmISP-STL
8h 02m1 stop
Frontier Logo
4:00 pm - 9:04 amSTL-ISP
16h 04m2 stops
$341Frontier
Find Deal
jue., ago. 28 - jue., sep. 4
Southwest Logo
3:05 pm - 10:20 pmISP-STL
8h 15m2 stops
Southwest Logo
10:10 am - 7:50 pmSTL-ISP
8h 40m2 stops
$348Southwest
Find Deal
vie., ago. 15 - dom., ago. 17

Southwest flights from Islip, New York to St. Louis

Our best Southwest deals on Islip, New York to St. Louis flight tickets
Southwest
Aug 29
ISP6:00 amIslip Long Island
6h 30m
1 stop
STL11:30 amLambert-St Louis
Sep 2
STL7:00 amLambert-St Louis
3h 55m
1 stop
ISP11:55 amIslip Long Island
$184
Find similar
Southwest
Aug 29
ISP6:00 amIslip Long Island
6h 30m
1 stop
STL11:30 amLambert-St Louis
Sep 2
STL5:25 amLambert-St Louis
8h 50m
2 stops
ISP3:15 pmIslip Long Island
$189
Find similar
Southwest
Aug 29
ISP3:05 pmIslip Long Island
5h 30m
1 stop
STL7:35 pmLambert-St Louis
Sep 1
STL5:25 amLambert-St Louis
5h 35m
2 stops
ISP12:00 pmIslip Long Island
$220
Find similar

Frontier flights from Islip, New York to St. Louis

Our best Frontier deals on Islip, New York to St. Louis flight tickets
Frontier
Aug 28
ISP6:05 amIslip Long Island
8h 02m
1 stop
STL1:07 pmLambert-St Louis
Aug 31
STL2:02 pmLambert-St Louis
8h 57m
1 stop
ISP11:59 pmIslip Long Island
$296
Find similar
Frontier
Aug 28
ISP6:05 amIslip Long Island
8h 02m
1 stop
STL1:07 pmLambert-St Louis
Sep 4
STL4:00 pmLambert-St Louis
16h 04m
2 stops
ISP9:04 amIslip Long Island
$341
Find similar
Frontier
Aug 28
ISP6:05 amIslip Long Island
8h 02m
1 stop
STL1:07 pmLambert-St Louis
Aug 31
STL7:54 pmLambert-St Louis
15h 22m
2 stops
ISP12:16 pmIslip Long Island
$362
Find similar

See travel insights to St. Louis from

How to get the cheapest flight ticket from Islip, New York to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $331. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $436. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Islip, New York in the morning is the least expensive time of day to depart. momondo users have found prices as low as $348 when looking at flights departing in the morning. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $400 per ticket.

When to book flights from Islip, New York to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Islip, New York to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Islip, New York to St. Louis (ISP to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip, New York to St. Louis

Best Price Found

$81

Fastest flight time

5h 30m

Direct flights

None

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Islip, New York in the past 72 hours is $81. The best round-trip flight deal from Islip, New York to St. Louis found on momondo in the last 72 hours is $184.
The fastest flight from Islip, New York to St. Louis takes 5h 30m
There are no direct flights from Islip, New York to St. Louis. Popular non-direct route for this connection is Islip Long Island Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
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  • How far is Islip Long Island to Lambert-St Louis by plane?

    There are 912.8 mi between Islip Long Island and Lambert-St Louis. In terms of flight time, this usually takes a little over 5h 30m.

  • When did momondo last update prices for flights from Islip Long Island Airport to Lambert-St Louis Airport?

    Prices for flights from Islip Long Island Airport to Lambert-St Louis Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Islip Long Island Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from Islip Long Island Airport to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Islip, New York to St. Louis?

Best airlines flying from Islip, New York to St. Louis

Compare and see reviews for airlines that fly from Islip, New York to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $304Free CancellationRating
8.0
4,250 reviews
Search Southwest flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
Florissant
Collinsville
Fenton
Farmington
O'Fallon
St. Peters
Alton
Wentzville
Festus
Glencoe
Clayton
Eureka
Edwardsville
Grafton
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Islip to St. Louis?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Islip to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Islip to St. Louis with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Islip to St. Louis flights to just show those with flexible booking policies.

How can momondo help me find flights from Islip to St. Louis?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Islip to St. Louis.

I’m not ready to book a flight from Islip to St. Louis right now. Can momondo alert me if prices change?

Price alerts on flights to St. Louis from Islip are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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