$157 Find Cheap Flights from Islip to Missouri

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Islip to Missouri departing on 2/26. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

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$157
Kansas City
Kansas City1 stop$225
St. Louis
St. Louis1 stop$157
Kansas City
Kansas City1 stop$225

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

Thu, Feb 26 - Tue, Mar 3
Frontier Logo
3:34 pm - 11:59 pm
ISP
-
STL
9h 25m
1 stop
Frontier Logo
3:49 pm - 8:40 am
STL
-
ISP
15h 51m
1 stop
$157Frontier
Thu, Feb 26 - Tue, Mar 3
Multiple Airlines Logo
3:34 pm - 6:51 am
ISP
-
STL
16h 17m
2 stops
Multiple Airlines Logo
3:49 pm - 8:40 am
STL
-
ISP
15h 51m
1 stop
$211Multiple Airlines
Fri, Feb 20 - Thu, Feb 26
Multiple Airlines Logo
8:33 am - 3:29 pm
ISP
-
MCI
7h 56m
1 stop
Multiple Airlines Logo
11:26 am - 7:38 am
MCI
-
ISP
19h 12m
2 stops
$225Multiple Airlines
Fri, Feb 20 - Thu, Feb 26
Multiple Airlines Logo
8:33 am - 3:29 pm
ISP
-
MCI
7h 56m
1 stop
Multiple Airlines Logo
5:59 pm - 4:12 pm
MCI
-
ISP
21h 13m
1 stop
$245Multiple Airlines
Thu, Feb 26 - Tue, Mar 3
Southwest Logo
1:10 pm - 9:25 pm
ISP
-
STL
9h 15m
2 stops
Southwest Logo
2:15 pm - 9:55 pm
STL
-
ISP
6h 40m
2 stops
$261Southwest
Tue, Mar 31 - Tue, Apr 7
Southwest Logo
5:45 am - 11:15 am
ISP
-
MCI
6h 30m
1 stop
Southwest Logo
6:05 am - 1:50 pm
MCI
-
ISP
6h 45m
1 stop
$335Southwest
Tue, Mar 31 - Tue, Apr 7
Southwest Logo
5:45 am - 1:30 pm
ISP
-
MCI
8h 45m
2 stops
Southwest Logo
6:05 am - 1:50 pm
MCI
-
ISP
6h 45m
1 stop
$340Southwest
Tue, Mar 31 - Tue, Apr 7
Southwest Logo
5:45 am - 1:30 pm
ISP
-
MCI
8h 45m
2 stops
Southwest Logo
5:30 am - 1:50 pm
MCI
-
ISP
7h 20m
2 stops
$345Southwest
Fri, Feb 20 - Thu, Feb 26
Southwest Logo
5:35 am - 1:15 pm
ISP
-
MCI
8h 40m
2 stops
Southwest Logo
12:15 pm - 11:30 pm
MCI
-
ISP
10h 15m
2 stops
$437Southwest
Thu, Apr 9 - Sun, Apr 12
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
$476Southwest
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.

Find deals

Good to know

Cheapest flight$157
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 4267 reviews
7.0Food
8.1Boarding
7.5Entertainment
8.6Crew
8.0Comfort
Airline reviews

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled. No snack or drink on this flight.

10.0 ExcellentJoseph, Jan 2026
BWI - RIC
Read more Southwest reviews

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled. No snack or drink on this flight.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled.

The wifi on the plane is great. The only issue that I have is that I prefer an aisle seat and on my trips this week, I was either in the middle or window. If we can work to secure aisle seating, I will be thrilled. Nice trip.

All good except once again bags took an hour at Midway Airport Happens all the time. Ridiculous

Everything went smoothly and we even arrived a little bit early.

Great vacation. Can't wait till next year for another one.

Great flight but super high price. Glad it was a business trip and not personal

On time. Friendly staff. Took to long to pre bord all the specialty groups. Cramped small plane

The seats were comfortable, and the boarding process was pretty smooth.

3 hour delay. Had to change plans and was still delayed.

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

Information on your arrival and departure airports

Islip (ISP)