$159 Find Cheap Flights from Islip to Missouri

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Islip to Missouri departing on 8/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Missouri

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Missouri, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Missouri, as well as popular online travel agencies
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Flights Deals

Best Missouri Flight Deals from Islip

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
St. Louis
St. Louis1 stop$268
Kansas City
Kansas City1 stop$332
St. Louis
St. Louis1 stop$268
Kansas City
Kansas City1 stop$332

Cheap Flights from Islip to Missouri

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Islip to Missouri that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Islip to Missouri

Fri, Aug 15 - Sun, Aug 17
Southwest Logo
3:05 pm - 7:35 pmISP-STL
5h 30m1 stop
Southwest Logo
8:10 am - 5:00 pmSTL-ISP
7h 50m1 stop
$268Southwest
Find Deal
Wed, Oct 15 - Sun, Oct 19
Southwest Logo
4:55 pm - 10:05 pmISP-STL
6h 10m2 stops
Southwest Logo
6:10 am - 12:10 pmSTL-ISP
5h 00m1 stop
$273Southwest
Find Deal
Sat, Jul 26 - Sun, Jul 27
Southwest Logo
6:00 am - 9:25 amISP-STL
4h 25m1 stop
Southwest Logo
5:20 am - 5:25 pmSTL-ISP
11h 05m1 stop
$298Southwest
Find Deal
Sat, Aug 16 - Sun, Aug 17
Southwest Logo
5:40 am - 11:30 amISP-STL
6h 50m2 stops
Southwest Logo
8:10 am - 5:00 pmSTL-ISP
7h 50m1 stop
$310Southwest
Find Deal
Sat, Aug 16 - Sun, Aug 17
Southwest Logo
5:40 am - 2:45 pmISP-STL
10h 05m1 stop
Southwest Logo
8:10 am - 5:00 pmSTL-ISP
7h 50m1 stop
$317Southwest
Find Deal
Sat, Jul 26 - Sat, Jul 26
Southwest Logo
6:00 am - 9:25 amISP-STL
4h 25m1 stop
Southwest Logo
3:20 pm - 11:10 pmSTL-ISP
6h 50m2 stops
$318Southwest
Find Deal
Sat, Jul 26 - Sat, Jul 26
Southwest Logo
6:00 am - 9:25 amISP-STL
4h 25m1 stop
Southwest Logo
3:10 pm - 10:05 pmSTL-ISP
5h 55m1 stop
$323Southwest
Find Deal
Sat, Jul 26 - Sun, Jul 27
Southwest Logo
5:25 pm - 10:00 pmISP-STL
5h 35m1 stop
Southwest Logo
8:30 am - 5:25 pmSTL-ISP
7h 55m2 stops
$328Southwest
Find Deal
Fri, Jul 11 - Thu, Jul 17
 Logo
3:59 pm - 5:09 pmISP-MCI
26h 10m3 stops
 Logo
10:30 am - 10:04 amMCI-ISP
22h 34m3 stops
Fri, Jul 11 - Thu, Jul 17
 Logo
3:59 pm - 5:09 pmISP-MCI
26h 10m3 stops
 Logo
4:23 pm - 3:19 pmMCI-ISP
21h 56m2 stops
Useful Info

KAYAK's insights & trends for Islip to Missouri flights

Get data-powered insights and trends into flights from Islip to Missouri to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Islip to Missouri flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from Islip to Missouri.

The cheapest ticket to Missouri from Islip found in the last 72 hours was to St. Louis, at $404 round-trip. The most popular route is from Islip (ISP) to St. Louis (STL), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $404.


Good to know

Cheapest flight$159
Flight from Islip to St. Louis

FAQs - booking Missouri flights

  • How does KAYAK find such low prices on flights from Islip to Missouri?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Islip to Missouri.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Islip to Missouri?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Islip to Missouri is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Islip to Missouri?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Islip to Missouri with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Islip to Missouri?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Islip to Missouri up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Islip to Missouri

 
See real verified KAYAK customer reviews for airlines flying from Islip to Missouri. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Islip to Missouri? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4279 reviews
8.0Comfort
7.6Entertainment
8.2Boarding
8.6Crew
7.1Food
Airline reviews

Southwest is Southwest. No frills. If you're luck enough to get a happy crew (we did), then it makes for a nicer flight.

10.0 ExcellentMichael, Jun 2025SMF - SEA
Read more Southwest reviews

Southwest is Southwest. No frills. If you're luck enough to get a happy crew (we did), then it makes for a nicer flight.

Southwest is typically delayed, and it gets wearisome. It is no longer a discount airline and you get way less than you pay for when it comes to comfort and Ce.

We sat on the plane on the tarmac for 4 hours.

I'm not a fan of Southwest's model. I don't like the herding style of boarding.

Flight crew and cabin crew were great. I had to rearrange flights because my original flight was 3hrs delayed for weather, the rub is the flight I moved to boarded on time then we sat at the gate for 2 hours because scheduling stole our first officer for another flight, TWICE. Then our actual FO was an hour delayed. To make it worse my original flight went from a 3 hour delay to departing 15min EARLY. Just poor scheduling operations all around.

Bring back peanuts Take our drink orders when were all seated, especially after you switch to assigned seating.

Staff was far less than helpful at all times. Departure and arrival times mean nothing to Southwest. Extremely disappointed, will never fly with them again, and I’ll be sure to share my experience with all.

It is southwest seat was ok. Not the most comfortable seat

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

The price of the tickets isn't matching the flight experience. No matter how long the flight is, you're only getting pretzels. The flight attendants looked unkept and over it.

Everything you need to know for your flight from Islip to Missouri

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