$90 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 4/10. 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, 0 bags

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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Cheap Flights from Islip to Missouri

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
St. Louis
St. Louis1 stop$411
Kansas City
Kansas City1 stop$436
St. Louis
St. Louis1 stop$411
Kansas City
Kansas City1 stop$436

Book Cheap Islip to Missouri Plane Tickets

 
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

Mon, Mar 30 - Fri, Apr 3
Southwest Logo
5:15 pm - 12:40 am
ISP
-
STL
8h 25m
1 stop
Southwest Logo
4:45 pm - 11:55 pm
STL
-
ISP
6h 10m
1 stop
$411Southwest
Mon, Mar 30 - Fri, Apr 3
Southwest Logo
5:55 pm - 12:05 am
ISP
-
STL
7h 10m
2 stops
Southwest Logo
7:15 am - 4:30 pm
STL
-
ISP
8h 15m
1 stop
$416Southwest
Sun, Mar 29 - Thu, Apr 2
Southwest Logo
5:40 pm - 12:15 am
ISP
-
STL
7h 35m
1 stop
Southwest Logo
7:15 am - 4:30 pm
STL
-
ISP
8h 15m
1 stop
$434Southwest
Thu, Apr 23 - Sun, Apr 26
Southwest Logo
4:30 pm - 10:40 pm
ISP
-
MCI
7h 10m
1 stop
Southwest Logo
6:10 pm - 11:50 pm
MCI
-
ISP
4h 40m
1 stop
$436Southwest
Thu, Apr 23 - Sun, Apr 26
Southwest Logo
4:30 pm - 10:40 pm
ISP
-
MCI
7h 10m
1 stop
Southwest Logo
2:35 pm - 11:50 pm
MCI
-
ISP
8h 15m
2 stops
$450Southwest
Mon, Mar 30 - Fri, Apr 3
Southwest Logo
5:55 pm - 12:05 am
ISP
-
STL
7h 10m
2 stops
Southwest Logo
2:15 pm - 11:55 pm
STL
-
ISP
8h 40m
2 stops
$454Southwest
Sun, Mar 29 - Thu, Apr 2
Southwest Logo
5:40 pm - 12:15 am
ISP
-
STL
7h 35m
1 stop
Southwest Logo
7:35 am - 5:20 pm
STL
-
ISP
8h 45m
2 stops
$472Southwest
Fri, May 22 - Mon, May 25
Southwest Logo
5:10 pm - 11:00 pm
ISP
-
MCI
6h 50m
1 stop
Southwest Logo
5:35 pm - 11:30 pm
MCI
-
ISP
4h 55m
1 stop
$476Southwest
Thu, Apr 2 - Sun, Apr 5
Southwest Logo
5:55 pm - 11:05 pm
ISP
-
STL
6h 10m
1 stop
Southwest Logo
5:50 am - 11:45 am
STL
-
ISP
4h 55m
1 stop
$481Southwest
Thu, Apr 9 - Sun, Apr 12
Multiple Airlines Logo
3:55 pm - 11:53 pm
ISP
-
MCI
8h 58m
1 stop
Multiple Airlines Logo
5:45 am - 8:05 pm
MCI
-
ISP
37h 20m
2 stops
$582Multiple Airlines
Booking Insights

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?

Data is based on round-trip flight searches on KAYAK over the past month.

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$90
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 4320 reviews
7.5Entertainment
7.0Food
8.1Boarding
8.0Comfort
8.6Crew
Airline reviews

Boarding was easy. The seats are small and fairly uncomfortable

8.0 ExcellentNicole, Mar 2026
LGB - OAK
Read more Southwest reviews

Boarding was easy. The seats are small and fairly uncomfortable

I was supposed to be on a later flight. When I showed up at the gate, the woman working there was extremely helpful getting moved up to this earlier flight.

We had a 5 hour delay on the tarmac in Baltimore

Long layover between flights to Long Island from BWI - need better coordination between flights

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

I realize they are still working out kinks with the new boarding process, but by the time I boarded in group 5, most of the bins were full. All airlines should better enforce small bags and jackets going under the seats until everyone has boarded.

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

Information on your arrival and departure airports