When did momondo last update prices for flights from Islip Long Island Airport to Missouri?

Prices for flights from Islip Long Island Airport to Missouri were last updated today.

How many operators does momondo search for flights from Islip Long Island Airport to Missouri?

As of December 2025, there is 1 operator available to choose from for flights from Islip Long Island Airport to Missouri.

How old do you have to be to fly from Islip Long Island Airport to Missouri?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to Missouri.

What documentation or ID do you need to fly to Missouri?

The travel and health documents required for your trip to Missouri can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Missouri. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$122 Cheap Flights from Islip to Missouri in 2025/26

1 adult

0 bags

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Find the cheapest flights from Islip, New York to Missouri

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:55 pm - 10:33 pm

ISP

STL

10h 38m1 stop

5:11 pm - 10:46 pm

STL

ISP

28h 35m1 stop

$193Frontier

Tue, Jan 6 - Mon, Jan 12

12:55 pm - 10:33 pm

ISP

STL

10h 38m1 stop

7:43 pm - 10:46 pm

STL

ISP

26h 03m2 stops

$216Frontier

Tue, Jan 6 - Mon, Jan 12

2:04 pm - 10:33 pm

ISP

STL

9h 29m1 stop

8:50 am - 7:51 pm

STL

ISP

10h 01m1 stop

$242Frontier

Mon, Jan 5 - Mon, Jan 12

2:04 pm - 10:33 pm

ISP

STL

9h 29m1 stop

9:35 am - 7:45 pm

STL

ISP

9h 10m1 stop

$277Frontier

Mon, Jan 5 - Sun, Jan 11

3:45 pm - 9:00 pm

ISP

STL

6h 15m2 stops

2:15 pm - 9:55 pm

STL

ISP

6h 40m2 stops

$407Southwest

Tue, Jan 6 - Mon, Jan 12

2:01 pm - 6:51 am

ISP

STL

41h 50m2 stops

8:39 am - 8:09 pm

STL

ISP

10h 30m1 stop

$445Multiple Airlines

Mon, Jan 12 - Mon, Jan 19

12:20 pm - 10:59 pm

ISP

MCI

11h 39m1 stop

6:15 pm - 11:59 pm

MCI

ISP

28h 44m2 stops

$539Multiple Airlines

Tue, Dec 30 - Sat, Jan 3

12:20 pm - 10:59 pm

ISP

MCI

11h 39m1 stop

3:47 pm - 7:39 pm

MCI

ISP

26h 52m1 stop

$672Multiple Airlines

Tue, Dec 30 - Sat, Jan 3

2:04 pm - 10:33 pm

ISP

STL

9h 29m1 stop

10:40 am - 7:40 pm

STL

ISP

8h 00m1 stop

$811Frontier

Mon, Dec 29 - Fri, Jan 2

Southwest flights from Islip, New York to Missouri

Our best Southwest deals on Islip, New York to Missouri flight tickets

Southwest

Jan 6

ISP3:45 pmIslip Long Island

7h 10m

2 stops

STL9:55 pmLambert-St Louis

Jan 12

STL2:35 pmLambert-St Louis

6h 20m

1 stop

ISP9:55 pmIslip Long Island

$247

Find similar

Southwest

Jan 6

ISP3:45 pmIslip Long Island

7h 10m

2 stops

STL9:55 pmLambert-St Louis

Jan 12

STL2:15 pmLambert-St Louis

6h 40m

2 stops

ISP9:55 pmIslip Long Island

$252

Find similar

Southwest

Jan 6

ISP3:45 pmIslip Long Island

6h 15m

2 stops

STL9:00 pmLambert-St Louis

Jan 12

STL2:15 pmLambert-St Louis

6h 40m

2 stops

ISP9:55 pmIslip Long Island

$407

Find similar

Frontier flights from Islip, New York to Missouri

Our best Frontier deals on Islip, New York to Missouri flight tickets

Frontier

Jan 6

ISP12:55 pmIslip Long Island

10h 38m

1 stop

STL10:33 pmLambert-St Louis

Jan 12

STL5:11 pmLambert-St Louis

28h 35m

1 stop

ISP10:46 pmIslip Long Island

$193

Find similar

Frontier

Jan 6

ISP12:55 pmIslip Long Island

10h 38m

1 stop

STL10:33 pmLambert-St Louis

Jan 12

STL8:50 amLambert-St Louis

10h 01m

1 stop

ISP7:51 pmIslip Long Island

$207

Find similar

Frontier

Jan 6

ISP12:55 pmIslip Long Island

10h 38m

1 stop

STL10:33 pmLambert-St Louis

Jan 12

STL7:43 pmLambert-St Louis

26h 03m

2 stops

ISP10:46 pmIslip Long Island

$216

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Tue 1/6

12:55 pm-10:33 pm

1 stop10h 38m

Lambert-St Louis

Mon 1/12

5:11 pm-10:46 pm

1 stop28h 35m

$193

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Tue 1/6

12:55 pm-10:33 pm

1 stop10h 38m

Lambert-St Louis

Mon 1/12

7:43 pm-10:46 pm

2 stops26h 03m

$216

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Mon 1/5

2:04 pm-10:33 pm

1 stop9h 29m

Lambert-St Louis

Mon 1/12

8:50 am-7:51 pm

1 stop10h 01m

$242

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Mon 1/5

2:04 pm-10:33 pm

1 stop9h 29m

Lambert-St Louis

Sun 1/11

9:35 am-7:45 pm

1 stop9h 10m

$277

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Tue 1/6

3:45 pm-9:00 pm

2 stops6h 15m

Lambert-St Louis

Mon 1/12

2:15 pm-9:55 pm

2 stops6h 40m

$407

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Mon 1/12

2:01 pm-6:51 am

2 stops41h 50m

Lambert-St Louis

Mon 1/19

8:39 am-8:09 pm

1 stop10h 30m

$445

IslipKansas City

ISP - MCI

ISPMCI

Islip Long Island

Tue 12/30

12:20 pm-10:59 pm

1 stop11h 39m

Kansas City

Sat 1/3

6:15 pm-11:59 pm

2 stops28h 44m

$539

IslipKansas City

ISP - MCI

ISPMCI

Islip Long Island

Tue 12/30

12:20 pm-10:59 pm

1 stop11h 39m

Kansas City

Sat 1/3

3:47 pm-7:39 pm

1 stop26h 52m

$672

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Mon 12/29

2:04 pm-10:33 pm

1 stop9h 29m

Lambert-St Louis

Fri 1/2

10:40 am-7:40 pm

1 stop8h 00m

$811

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Sun 1/11

8:40 pm-8:05 am

1 stop12h 25m

$122

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first

How to get the cheapest flight ticket from Islip, New York to Missouri

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Islip Long Island to Missouri?

Frontier is the most popular carrier operating from Islip Long Island to Missouri

What airlines fly to Missouri?

Delta, United Airlines and American Airlines are the top three most popular airlines that fly to Missouri from Islip, New York according to our data. Delta is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Missouri. Keep in mind that there are 6 different airlines that fly to Missouri on a routine basis, so you have a few additional options to choose from.

Cheap Islip, New York to Missouri flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip, New York to Missouri

Fastest flight time	7h 40m
Direct flights	None

The fastest flight from Islip, New York to Missouri takes 7h 40m

There are no direct flights from Islip, New York to Missouri. There are no popular flight routes from Islip, New York to Missouri.

Search flight deals

When did momondo last update prices for flights from Islip Long Island Airport to Missouri?
Prices for flights from Islip Long Island Airport to Missouri were last updated today.
How many operators does momondo search for flights from Islip Long Island Airport to Missouri?
As of December 2025, there is 1 operator available to choose from for flights from Islip Long Island Airport to Missouri.
How old do you have to be to fly from Islip Long Island Airport to Missouri?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to Missouri.
What documentation or ID do you need to fly to Missouri?
The travel and health documents required for your trip to Missouri can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Missouri. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Islip, New York to Missouri

Compare and see reviews for airlines that fly from Islip, New York to Missouri with momondo

Airline	Rating	Free Cancellation	Price
Southwest	PriceFrom $259	Free Cancellation	Rating 7.9 4,250 reviews		Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Islip to Missouri?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Islip to Missouri. momondo saves you time and could save you money on your trip.

Can I find flights from Islip to Missouri with flexible booking policies on momondo?

Yes. All flights to Missouri from Islip on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Islip to Missouri?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Islip to Missouri.

I’m not ready to book a flight from Islip to Missouri right now. Can momondo alert me if prices change?

Price alerts on flights to Missouri from Islip are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.