In terms of precipitation, rainfall in Islip, New York ranges from 3.3 - 4.4 inches per month. March is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Islip, New York when rainfall is around 3.3 in.

If weather is an important factor for your trip to Islip, New York, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 Lambert-St Louis - Islip Long Island or Springfield-Branson - Islip Long Island.

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

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.

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.

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.

$110+ Flights from Missouri to Islip, NY

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Cheap flight deals from Missouri to Islip

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$280 (Kiwi.com)
One-way from	$110 (Priceline)
Popular in	November
Cheapest in	April
Average price	$321

Provider with most accurate pricing for Lambert-St Louis-New York (NYC) flight deals.

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Provider most trusted by Cheapflights users for Lambert-St Louis-New York (NYC) flights.

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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. 12% potential increase in price ($43 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).

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Average for round-trip flights in January 2026

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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 January 11, 2026.

Sat 1/245:42 pmSTL - ISP

1 stop13h 58mMultiple Airlines

Wed 1/2811:50 amISP - STL

2 stops12h 43mMultiple Airlines

Deal found 1/9

$280

Thu 7/235:05 amMCI - ISP

1 stop5h 45mSouthwest

Sun 7/266:00 amISP - MCI

1 stop5h 00mSouthwest

Deal found 1/10

$447

Best flights from Missouri to Islip
Discover carefully curated flight deals from Missouri to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 11, 2026.

Sat 1/245:42 pmSTL - ISP

1 stop13h 58mMultiple Airlines

Wed 1/2811:50 amISP - STL

2 stops12h 43mMultiple Airlines

Deal found 1/9

$280

Last-minute flights from Missouri to Islip
Discover last-minute flight deals from Missouri to Islip. Data last updated January 11, 2026 and is based on user searches.

Sat 1/245:42 pmSTL - ISP

1 stop13h 58mMultiple Airlines

Wed 1/2811:50 amISP - STL

2 stops12h 43mMultiple Airlines

Deal found 1/9

$280

One-way flights from Missouri to Islip
Search for one-way flight options from Missouri to Islip. Find affordable one-way fares based on user searches. Data last updated January 11, 2026.

Thu 3/267:47 amSTL - ISP

1 stop7h 26mFrontier

Deal found 1/9

$110

Thu 3/264:55 pmSTL - ISP

2 stops6h 00mSouthwest

Deal found 1/9

$167

Thu 3/269:50 amSTL - ISP

3 stops22h 58mMultiple Airlines

Deal found 1/9

$241

Thu 3/197:47 amSTL - ISP

1 stop7h 02mFrontier

Deal found 1/8

$260

Tue 1/206:50 amSTL - ISP

1 stop4h 05mSouthwest

Deal found 1/9

$300

Sun 3/227:47 amSTL - ISP

1 stop7h 02mFrontier

Deal found 1/8

$499

Tue 1/205:42 pmSTL - ISP

3 stops45h 28mMultiple Airlines

Deal found 1/9

$503

Mon 1/1912:47 pmSTL - ISP

1 stop6h 03mFrontier

Deal found 1/9

$548

Sun 3/157:47 amSTL - ISP

1 stop7h 02mFrontier

Deal found 1/9

$598

Fly from

Fly to

Route

Depart

Return

Price

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

Sat 1/24

5:42 pm-8:40 am

1 stop13h 58m

Islip Long Island

Wed 1/28

11:50 am-11:33 pm

2 stops12h 43m

$280

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

Thu 3/26

7:47 am-4:13 pm

1 stop7h 26m

$110

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

Thu 3/26

4:55 pm-11:55 pm

2 stops6h 00m

$167

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

Thu 3/26

9:50 am-9:48 am

3 stops22h 58m

$241

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

Thu 3/19

7:47 am-3:49 pm

1 stop7h 02m

$260

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

Tue 1/20

6:50 am-11:55 am

1 stop4h 05m

$300

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

Sun 3/22

7:47 am-3:49 pm

1 stop7h 02m

$499

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

Tue 1/20

5:42 pm-4:10 pm

3 stops45h 28m

$503

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/9

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, August is the cheapest month in which you can book a flight from Missouri to Islip, New York (average of $129). Flying from Missouri to Islip, New York in November is currently the most expensive (average of $182). 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.

Related info for your journey

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 Lambert-St Louis - Islip Long Island or Springfield-Branson - 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, August is the cheapest month in which you can book a flight from Missouri to Islip, New York (average of $129). Flying from Missouri to Islip, New York in November is currently the most expensive (average of $182). 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

Airline	Cheapest	Average	Flexibility	On-time
Southwest	Cheapest$259	Average$387	FlexibilityNo cancel fee	On-time63%

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$110+ 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 3/26. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Missouri to Islip with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 January 11, 2026.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Missouri to Islip

Cheapest flights from Missouri to IslipExplore 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 January 11, 2026.

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 January 11, 2026.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Missouri to Islip that are best for you.

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.

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?

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?

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

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

How can I find direct flights from Missouri to Islip?

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

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

Traveling to a place near Islip?

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Alternative routes for Missouri to Islip

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Top airline flying from Missouri to Islip

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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 January 11, 2026.