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Missouri

$122+ Cheap flights from Islip, NY (ISP) to Missouri

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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — MCI
ene. 16 — ene. 231
vie. 1/16
vie. 1/23
1 adult, Economy
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Cheap flight deals from Islip to Missouri

Best flights from Islip to Missouri
Discover carefully curated flight deals from Islip to Missouri that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated diciembre 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 1/612:55 pmISP - STL
1 stop10h 38mFrontier
lun. 1/125:11 pmSTL - ISP
1 stop28h 35mFrontier
Deal found 12/15$193
This Southwest deal was found by Cheapflights users on 12/16. 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.
mar. 1/63:45 pmISP - STL
2 stops7h 10mSouthwest
lun. 1/122:35 pmSTL - ISP
1 stop6h 20mSouthwest
Deal found 12/16$247
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 1/138:00 amISP - MCI
1 stop9h 09mMultiple Airlines
mar. 1/205:04 pmMCI - ISP
2 stops48h 42mMultiple Airlines
Deal found 12/16$264
This Frontier deal was found by Cheapflights users on 12/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 1/52:04 pmISP - STL
1 stop9h 29mFrontier
lun. 1/128:50 amSTL - ISP
1 stop10h 01mFrontier
Deal found 12/15$242
This Trip.com deal was found by Cheapflights users on 12/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 2/412:25 pmISP - MCI
1 stop23h 06mMultiple Airlines
lun. 2/911:26 amMCI - ISP
1 stop23h 09mMultiple Airlines
Deal found 12/16$275
This Frontier deal was found by Cheapflights users on 12/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 1/52:04 pmISP - STL
1 stop9h 29mFrontier
dom. 1/119:35 amSTL - ISP
1 stop9h 10mFrontier
Deal found 12/15$277
This Southwest deal was found by Cheapflights users on 12/16. 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.
mar. 1/1312:40 pmISP - MCI
1 stop5h 50mSouthwest
mar. 1/206:15 amMCI - ISP
1 stop4h 40mSouthwest
Deal found 12/16$333
This Southwest deal was found by Cheapflights users on 12/16. 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.
mié. 2/46:00 amISP - MCI
1 stop5h 35mSouthwest
lun. 2/96:20 amMCI - ISP
1 stop4h 35mSouthwest
Deal found 12/16$342
This Frontier deal was found by Cheapflights users on 12/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 1/112:20 pmISP - STL
1 stop11h 13mFrontier
lun. 1/510:40 amSTL - ISP
1 stop7h 59mFrontier
Deal found 12/16$393
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 1/122:01 pmISP - STL
2 stops41h 50mMultiple Airlines
lun. 1/198:39 amSTL - ISP
1 stop10h 30mMultiple Airlines
Deal found 12/14$445

Find flight deals from Islip to Missouri

Keep the following information in mind while searching for Islip to Missouri flight deals. Data was last updated diciembre 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$185
(Kiwi.com)

One-way from

$122
(Frontier)

Popular in

December

Cheapest in

March

Average price

$439
Provider with most accurate pricing for New York (NYC)-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for New York (NYC)-Lambert-St Louis flights.
Search Deals
From Islip Long Island to Missouri
Search Deals
One-way flight from Islip Long Island to Missouri
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Missouri 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 diciembre 17, 2025.
Use the filters below to find and compare flights from Islip to Missouri that are best for you.

Fly from

Islip

Fly to

Missouri

Route

Depart

Return

Price

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

mar. 1/6

12:55 pm-10:33 pm

1 stop10h 38m

Lambert-St Louis

lun. 1/12

5:11 pm-10:46 pm

1 stop28h 35m

$193

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

lun. 1/5

2:04 pm-10:33 pm

1 stop9h 29m

Lambert-St Louis

lun. 1/12

8:50 am-7:51 pm

1 stop10h 01m

$242

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

mar. 1/6

3:45 pm-9:55 pm

2 stops7h 10m

Lambert-St Louis

lun. 1/12

2:35 pm-9:55 pm

1 stop6h 20m

$247

IslipKansas City

ISP - MCI

ISPMCI

Islip Long Island

mar. 1/13

8:00 am-4:09 pm

1 stop9h 09m

Kansas City

mar. 1/20

5:04 pm-6:46 pm

2 stops48h 42m

$264

IslipKansas City

ISP - MCI

ISPMCI

Islip Long Island

mié. 2/4

12:25 pm-10:31 am

1 stop23h 06m

Kansas City

lun. 2/9

11:26 am-11:35 am

1 stop23h 09m

$275

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

lun. 1/5

2:04 pm-10:33 pm

1 stop9h 29m

Lambert-St Louis

dom. 1/11

9:35 am-7:45 pm

1 stop9h 10m

$277

IslipKansas City

ISP - MCI

ISPMCI

Islip Long Island

mar. 1/13

12:40 pm-5:30 pm

1 stop5h 50m

Kansas City

mar. 1/20

6:15 am-11:55 am

1 stop4h 40m

$333

IslipKansas City

ISP - MCI

ISPMCI

Islip Long Island

mié. 2/4

6:00 am-10:35 am

1 stop5h 35m

Kansas City

lun. 2/9

6:20 am-11:55 am

1 stop4h 35m

$342

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

jue. 1/1

12:20 pm-10:33 pm

1 stop11h 13m

Lambert-St Louis

lun. 1/5

10:40 am-7:39 pm

1 stop7h 59m

$393

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

lun. 1/12

2:01 pm-6:51 am

2 stops41h 50m

Lambert-St Louis

lun. 1/19

8:39 am-8:09 pm

1 stop10h 30m

$445

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 15 results
1
2

Best time to book a flight from Islip to Missouri

Have a flexible travel schedule? Discover the best time to fly to Missouri from Islip 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 Islip to Missouri

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

Currently, March is the cheapest month in which you can book a flight from Islip, New York to Missouri (average of $60). Flying from Islip, New York to Missouri in July is currently the most expensive (average of $214). 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 ISP to MO?

Find hourly flight availability from Islip to Missouri. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated diciembre 17, 2025.

It’s typically best to fly out from Islip, New York to Missouri in the evening. Doing so could potentially save you 33% on the flight price compared to flying in the afternoon, which is usually more expensive.

Reviews of airlines servicing Missouri

Get insights into the airlines that provide service to Missouri. 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 Missouri. Reviews last updated diciembre 17, 2025.
Peruse reviews from past customers who have flown with Southwest from Islip to Missouri to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,250 reviews

Food

7.0

Overall

7.9

Comfort

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
7.9
Good
4,250 reviews
Southwest
7.9
Good
4,250 reviews

Food

7.0

Overall

7.9

Comfort

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Islip to Missouri. 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 from for flights from Islip to Missouri?

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

  • How long is the flight from Islip, New York to Missouri?

    There are many flights that can get you from Islip, New York to Missouri in 7h 10m. Fly via Frontier or Southwest to get the fastest option. Airlines will cover a distance of 926 mi. This flight may include one or multiple stops.

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

    While some choose either Islip Long Island - Kansas City or Islip Long Island - Columbia Regional, Islip Long Island - Lambert-St Louis is the most popular route from Islip, New York to Missouri.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Islip to Missouri 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 Islip, New York to Missouri?

    Currently, March is the cheapest month in which you can book a flight from Islip, New York to Missouri (average of $60). Flying from Islip, New York to Missouri in July is currently the most expensive (average of $214). 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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Alternative routes for Islip to Missouri

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Top airline flying from Islip to Missouri

Discover the top airline that operate flights from Islip to Missouri. 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 diciembre 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$259Average$383FlexibilityNo cancel feeOn-time63%

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