$88 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 5/5. 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

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$181
Kansas City
Kansas City1 stop$327
St. Louis
St. Louis1 stop$181
Kansas City
Kansas City1 stop$327

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.

Recent round-trip flight deals from Islip to Missouri

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Islip to Missouri.
Discover the best prices for you by selecting your travel dates on KAYAK.
Frontier Logo
6:48 pm - 12:06 amISP-STL
6h 18m1 stop
Frontier Logo
5:45 pm - 10:12 amSTL-ISP
15h 27m1 stop
$181Frontier
Find Deal
Mon, May 12 - Wed, May 14
Frontier Logo
6:48 pm - 12:06 amISP-STL
6h 18m1 stop
Frontier Logo
5:45 pm - 10:12 amSTL-ISP
15h 27m1 stop
$221Frontier
Find Deal
Thu, May 15 - Sun, May 18
Frontier Logo
8:21 pm - 11:44 pmISP-STL
28h 23m1 stop
Frontier Logo
5:45 pm - 7:41 pmSTL-ISP
24h 56m1 stop
$241Frontier
Find Deal
Fri, May 30 - Sun, Jun 1
Southwest Logo
6:00 am - 10:50 amISP-STL
5h 50m1 stop
Southwest Logo
5:25 am - 5:15 pmSTL-ISP
10h 50m2 stops
$244Southwest
Find Deal
Wed, Jun 18 - Sat, Jun 21
Southwest Logo
6:00 am - 12:35 pmISP-STL
7h 35m2 stops
Southwest Logo
5:25 am - 5:15 pmSTL-ISP
10h 50m2 stops
$249Southwest
Find Deal
Wed, Jun 18 - Sat, Jun 21
Frontier Logo
6:48 pm - 12:06 amISP-STL
6h 18m1 stop
Frontier Logo
5:35 pm - 7:34 pmSTL-ISP
24h 59m1 stop
$251Frontier
Find Deal
Mon, May 19 - Sat, May 24
Frontier Logo
8:21 pm - 11:44 pmISP-STL
28h 23m1 stop
Frontier Logo
5:45 pm - 7:34 pmSTL-ISP
24h 49m1 stop
$261Frontier
Find Deal
Fri, May 23 - Tue, May 27
Frontier Logo
6:48 pm - 12:06 amISP-STL
6h 18m1 stop
Frontier Logo
5:45 pm - 7:34 pmSTL-ISP
24h 49m1 stop
$271Frontier
Find Deal
Mon, May 19 - Thu, May 22
Southwest Logo
6:00 am - 10:50 amISP-STL
5h 50m1 stop
Southwest Logo
6:05 am - 11:35 amSTL-ISP
4h 30m1 stop
$278Southwest
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Wed, Jun 18 - Sat, Jun 21
Frontier Logo
8:21 pm - 11:52 pmISP-STL
28h 31m1 stop
Frontier Logo
5:45 pm - 7:26 pmSTL-ISP
24h 41m1 stop
$291Frontier
Find Deal
Thu, May 22 - Mon, May 26
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.

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Good to know

Cheapest flight$88
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.

  • What is the cheapest time of day to fly to Missouri?

    The cheapest time of day to fly to Missouri is generally in the morning, when round-trip flights cost $366 on average. The most expensive time of day to fly to Missouri is generally in the morning, which is peak travel time and where the average cost of a ticket is $366.

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 4294 reviews
8.0Comfort
8.2Boarding
7.6Entertainment
7.1Food
8.6Crew
Airline reviews

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

8.0 ExcellentJohn, Apr 2025PVD - FLL
Read more Southwest reviews

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.

Plz don't take away free bags and free seating

The seats were a bit cramped and worn, but otherwise okay.

I would have liked to arrive on time - not 5 hours late!

After a 3 hour layover in Denver my flight was delayed over 5 hours! No explanation; no assistance; no offer to provide compensation; no one at Southwest was willing to offer any assistance. 8 hours in the Denver airport - ridiculous!

It was a perfect flight in all aspects! Both legs!

Only one drink pass through the cabin for a 4 hour flight. Quite rough and bumpy landing.

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

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

Information on your arrival and departure airports

Islip (ISP)

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