Find cheap flights from St. Louis to Islip

STL - ISP

Find cheap flights from St. Louis to Islip

Round-trip
Economy
St. Louis (STL)
Islip Long Island
Fri 3/5
Fri 3/12
Any month
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Good to know

Low season

AugustBest time to beat the crowds with an average 52% drop in price.

High season

FebruaryMost popular time to fly with an average 49% increase in price.

Average price round-trip

$361(avg. price over the last 2 weeks)

Good deal round-trip

$277or less

Good deal one-way

$143or less

When to book flights from St. Louis to Islip

Estimated round-trip price
Average price per month

Top tips for finding a cheap flight

  • Looking for a cheap flight? 25% of our users found flights on this route for $143 or less one-way and $277 or less round-trip.
  • High season is considered to be January, February and March. The cheapest month to fly is August.
  • Morning departure is around 19% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for booking flights from St. Louis to Islip

Are there Islip travel restrictions currently due to Coronavirus?

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How does KAYAK find such low prices on flights from St. Louis to Islip?

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What is the Hacker Fare option on flights from St. Louis to Islip?

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Top airline flying Lambert-St Louis to Islip Long Island

Scores according to KAYAK customer reviews

7.2
American Airlines
Overall score based on 45,169 reviews
7.5
Boarding
7.1
Comfort
7.8
Crew
6.8
Entertainment
6.7
Food
Airline reviews

Cons: "First time we have flown First Class on American Airlines and service was outstanding and perfect! Thank you for an amazing experience!!"

Pros: "Timelness"
Cons: "More leg room"

Pros: "Seat uncomfortable. I am an elite flier and was put in an n uncomfortable middle seat with no choice."
Cons: "Seat should with choice."

Pros: "Nothing"
Cons: "Handicap issues. We were exiting on the tarmac in Charlotte- all crew left us on the plane waiting for assistance to get off. Finally when someone showed they would not come up the ramo to get my Mom. I backed her down myself while 5 bewildered airport workers looked confused."

Cons: "2 hour delays on both flights of a round trip"

Cons: "4 hour plane availability delay - of course planned on weather but not planning"

Pros: "On time"
Cons: "Having to walk from concourse b to concourse e for my connecting flight in less than 15min before the doors were shut. Was literally in my seat for 5min and the door was shut. Most people (older or families) would have missed it. Shame on CLT or American Airlines"

Pros: "On time. Friendly and attentive staff."

Pros: "A cheap option to upgrade to 1st was offered that ended up being a net 0 cost upgrade for me so I took it. Comfortable on an old (but oh so nice) aircraft."
Cons: "Arrived 30 minutes early to the airport but then had to sit at a remote pad so that we ended up being 5 minutes late to the gate. A short transfer was made even more difficult, and a massive waste if time and fuel sitting and waiting. Figure out your gates early and better, and move around if needed. At the very least, bring up some stairs and buses to get passengers to the terminal and then tow the aircraft in when you have a gate available."

Pros: "I fflew Delta last Nov. Had meals movies dinner inks etc. American I am serv d beverages no meals and no movies. Getting ridiculous"

Pros: "Room between rows Entertainment from St Louis to Phoenix"

Cons: "Flight was cancelled with no compensation"

Pros: "Fast"

Pros: "The crew was great"
Cons: "The seats were not comfortable and boarding was a pain. Not sure why you wouldn’t want to board from the back to front. Weather grounded us at our loading airport so we were stuck with the option of staying the flight or going in the lobby."

Pros: "The pilot was great. Avoided turbulence and arrived about 20min early. Easy to find seat and stow bag. Smooth takeoff and landing."
Cons: "Alaska airlines was who I thought I was riding with but the itinerary changed past min. Gate change and the airline itself was changed. Really confusing since I printed my boarding pass the night before."

Pros: "Everything went smoothly."

Pros: "The flight was what one would expect from a domestic airline. They did provide free movies/tv which was nice. It was one time to leave and on time to arrive."

Pros: "Quick boarding, on time departure and early arrival. No waiting for a gate at LGA upon arrival - excellent."

Cons: "Flight connections time was not enough for mam with infant.we missed the flight should better set up that kind of big airport"

Pros: "To be fair. The flight is only 50 minutes. By th time you get a drink it's time to land. It is completely unfair to the staff to have to do that. A flight like that. Have a box with a snack and some coolers that have 5 different beverages. I wouldn't even sell booze. I person can hold out for a flight that shot to get one on the connection or in the terminal."
Cons: "It's always a cramped flight. Nothing to be done except use a bigger, more spacious plane. The good thing is it's the fastest way to get to Chicago from where I lived it would take 6hrs by car."

Pros: "Spacious seats"

Pros: "I was so happy I could check in online and boarding was a breeze. I actually got to sit by the window when my original seat was in the middle. So nice of the ladies to suggest it to me."
Cons: "No complaints"

Cons: "The video monitor for my seat was broken. So, low entertainment score."

Pros: "everything was on tyime"

Pros: "On time take off"

Pros: "A nonstop flight, with a friendly efficient crew, met my expectations. A crew member went above and beyond when I asked for a coffee stirrer with my coke and ice."
Cons: "I've been spoiled by another airline's access to screens on the back of the headrest. I have my own hand held devices to entertain myself instead."

Cons: "Delayed a total of four hous!"

Cons: "good"

Pros: "Flight was on time, staff was friendly and boarding was organized."
Cons: "I'm a small person (5'-2", 105lbs) and I didn't have room to breathe in that tiny little seat."

Pros: "Smooth - trouble free - calm process"

Pros: "Arrived to the airport well ahead of time and encountered lines so long that we were not able to make our flight. Only 2 attendants working and so many people had to be rebooked we didn't get another flight for 3 days. Did I mention I was traveling with a baby?"

Pros: "On time arrival"
Cons: "Everything else"

Pros: "Nothing"
Cons: "The storage are very small, by the time i boarded everything was full. I had to hand carry bags and i had to put it in front of me which is a very small space already, on top of that i had the window sit so i had no space to move. it was very uncomfortable, and flight was delayed. We sat there for an hour before taking off but i understand its due to the weather but it was my worst plane ride not worth 300dollars. I will not ride american airline again."

Pros: "JAL is customer oriented and it's always a pleasant experience. Unfortunately, though the return trip is also JAL, the cabin crew isn't."

Cons: "Everything was great."

Cons: "Only suggestion would be to make the connection process a little easier. If the passenger doesn't speak English, the fact you need to print the international ticket in Miami, then re-enter at checkpoint might create confusion."

Pros: "On time. Good leg room."
Cons: "Valet flight, i.e. even normal sized carry-on cannot be stowed above the seat We arrived at the gate 20 min before departure, due to TSA delays. But they closed the door and no one was around to even talk to. At least they put us in the next flight.... Still, as we're not checking in any bags, they could have let us in."

Cons: "Got to charlotte with 80 minutes to connect. Sat on the tarmac for 60 waiting for a gate. Missed connection by <5 minutes. Thanks, AA!"

Pros: "Non stop"
Cons: "Airline"

Cons: "Boarding took forever, the flight was over 2 hours late which caused me to miss my connecting flight and my military orders were not honored - I still had to pay extra to take all my gear back to my duty station. Never had that issue with any other American airline."

Cons: "No food or beverages for me. I slept comfortably on my flight"

Pros: "I don't know how airlines get away with all the stipulations and regualations they have in the buying process there is. Otho g I like about the scam artist they are"
Cons: "The fact they they can just make it a policy and then because the employees have to have a job and enforce it blows my mind. 200 dollar transfer fee plus the difference in the ticket when it's over two weeks in advance. You people are scam artist"

Pros: "You provide me with the best ticket prices and to me that was the the most important part of of the trip thx"
Cons: "The airlines charging for your luggage"

Pros: "Plenty of leg room no entertainment so I dozed."
Cons: "People stuffing oversized bags in overhead."

Pros: "The movies"
Cons: "No Food"

Pros: "Boarding was pleasant, flight attendant was very nice. Served several snacks and choice of drinks."
Cons: "no entertainment"

Pros: "Frankly there isn't much to say here. After 7 flights in 2 weeks there was only 1 flight with great staff that actually cared about the customers and looked like they enjoyed their job. The rest treated guests with indifference at best."
Cons: "Customer service is dreadful, the planes are so old they still have cigarette lighter charges in first (but of course no adapters), no food/snacks of any significance, and they seemingly cancel flights at a whim with basically no staff to help re-book the lines of guests that have been disrupted. I pity those who loose luggage AA baggage services are flooded with lost baggage they just don't care any more. Seriously its embarrassing how little they care about customer service."

Cons: "Flight was delayed."

Cons: "Would be nice to know ahead of time if flight is equipped with an in seat television so as to be prepared to bring headphones."

Read more about American Airlines
COVID-19 information

Safety measures for airlines flying from St. Louis to Islip

Airlines flying from St. Louis to Islip have enacted additional safety measures and adjusted policies to better accommodate travelers. Policies vary by airline.

Heightened sanitation

Daily cleaning, installation of cabin HEPA filters on flights from St. Louis to Islip

Mandatory masks

Masks required on board, masks provided on flights from St. Louis to Islip

Social distancing seating

Middle seats unavailable to book on flights from St. Louis to Islip

Pre-flight testing

Testing for antibodies, testing for symptoms for flights from St. Louis to Islip

Book cheap flights from St. Louis to Islip

Recent round-trip flight deals

8/23
Mon
1 stop
American Airlines
6h 02m
STL - ISP
9/7
Tue
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American Airlines
4h 53m
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4/12
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American Airlines
4h 48m
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21h 19m
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4/1
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American Airlines
9h 10m
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4/5
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6h 08m
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4/5
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American Airlines
10h 27m
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4/5
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8/21
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9/1
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4h 53m
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8/22
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9/4
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4h 53m
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8/5
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Recent one-way flight deals

3/18
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American Airlines
4h 49m
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