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Islip

$137+ Cheap flights from Missouri to Islip, NY (ISP)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ISP
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheap flight deals from Missouri to Islip

Keep the following information in mind while searching for Missouri to Islip flight deals. Data was last updated July 3, 2025.

Round-trip from

$333
(Gotogate)

One-way from

$137
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$326
From Missouri to Islip Long Island
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One-way flight from Missouri to Islip Long Island
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Highest demand for flights based on searches. 11% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Missouri to Islip

Cheapest flights from Missouri to Islip
Explore the most affordable flight options available from Missouri to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

This Gotogate deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/35:40 pmSTL - ISP
1 stop25h 12mFrontier
Sat 8/98:37 pmISP - STL
1 stop28h 10mFrontier
Deal found 7/1$333
This Southwest deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/35:20 pmSTL - ISP
1 stop5h 35mSouthwest
Sat 8/95:40 amISP - STL
2 stops9h 35mSouthwest
Deal found 7/1$372

Cheapflights Fare Finder

Customize your flight search to find flights from Missouri to Islip that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 3, 2025.
Use the filters below to find and compare flights from Missouri to Islip that are best for you.

Fly from

Missouri

Fly to

Islip

Route

Depart

Return

Price

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

Sun 8/3

5:40 pm-7:52 pm

1 stop25h 12m

Islip Long Island

Sat 8/9

8:37 pm-11:47 pm

1 stop28h 10m

$333

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

Sun 8/3

5:20 pm-11:55 pm

1 stop5h 35m

Islip Long Island

Sat 8/9

5:40 am-2:15 pm

2 stops9h 35m

$372

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

Sun 9/7

2:02 pm-10:40 am

1 stop19h 38m

$137

Kansas CityIslip

MCI - ISP

MCIISP

Kansas City

Fri 9/19

2:55 pm-10:40 am

2 stops18h 45m

$213

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

Sun 9/7

2:30 pm-1:45 pm

3 stops22h 15m

$238

SpringfieldIslip

SGF - ISP

SGFISP

Springfield-Branson

Sat 8/2

10:00 pm-9:56 am

3 stops34h 56m

$378

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Best time to book a flight from Missouri to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Missouri with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Missouri to Islip, New York?

Currently, January is the cheapest month in which you can book a flight from Missouri to Islip, New York (average of $108). Flying from Missouri to Islip, New York in November is currently the most expensive (average of $213). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from MO to ISP?

Find hourly flight availability from Missouri to Islip. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Missouri to Islip, New York as you normally would.

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Islip. Reviews last updated July 3, 2025.
Read reviews from past customers who have flown Southwest and Frontier from Missouri to Islip. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,270 reviews

Crew

8.6

Food

7.0

Entertainment

7.6

Comfort

8.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,270 reviews
Southwest
8.0
Very good
4,270 reviews

Crew

8.6

Food

7.0

Entertainment

7.6

Comfort

8.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Frontier
5.9
Fair
3,284 reviews
Southwest
8.0
Very good
4,270 reviews

Crew

8.6

Food

7.0

Entertainment

7.6

Comfort

8.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Related info for your journey

Find useful and relevant information for your journey from Missouri to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Islip from Missouri?

    If you book a flight to Islip from Missouri, you will be flying to Long Island, which is the city’s only airport. Islip Long Island (ISP) is located 7.2 mi from the center of Islip.

  • What are the most popular routes from Missouri to Islip, New York?

    The most popular route from Missouri to Islip, New York is Kansas City - Islip Long Island. You may also consider Springfield-Branson - Islip Long Island or Lambert-St Louis - Islip Long Island.

  • Can I find deals for flights from Missouri to Islip that include hotel bookings?

    Yes. In addition to deals on Missouri to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Missouri to Islip?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Missouri to Islip.

  • Can I find deals for business class flights from Missouri to Islip?

    Yes. Cheapflights offers flight deals from Missouri to Islip by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Missouri to Islip, New York?

    Currently, January is the cheapest month in which you can book a flight from Missouri to Islip, New York (average of $108). Flying from Missouri to Islip, New York in November is currently the most expensive (average of $213). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top airline flying from Missouri to Islip

Discover the top airline that operate flights from Missouri to Islip. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$290Average$394FlexibilityNo cancel feeOn-time63%

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