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 April 2026, 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.

$111 Cheap Flights from Islip to Missouri in 2026

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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.

6:00 am - 10:50 am

ISP

STL

5h 50m

1 stop

6:35 am - 11:55 am

STL

ISP

4h 20m

1 stop

$286Southwest

Fri, May 8 - Tue, May 12

4:30 pm - 11:15 pm

ISP

STL

7h 45m

2 stops

6:35 am - 1:50 pm

STL

ISP

6h 15m

1 stop

$291Southwest

Fri, May 8 - Tue, May 12

4:30 pm - 11:15 pm

ISP

STL

7h 45m

2 stops

12:40 pm - 10:10 pm

STL

ISP

8h 30m

2 stops

$296Southwest

Fri, May 8 - Tue, May 12

6:00 am - 10:50 am

ISP

STL

5h 50m

1 stop

11:15 am - 4:30 pm

STL

ISP

4h 15m

1 stop

$313Southwest

Fri, May 1 - Fri, May 8

8:35 am - 1:50 pm

ISP

STL

6h 15m

1 stop

7:20 am - 4:30 pm

STL

ISP

8h 10m

2 stops

$318Southwest

Fri, May 1 - Fri, May 8

4:30 pm - 11:40 pm

ISP

STL

8h 10m

2 stops

2:25 pm - 11:30 pm

STL

ISP

8h 05m

2 stops

$323Southwest

Fri, May 1 - Fri, May 8

5:50 pm - 11:10 pm

ISP

STL

6h 20m

1 stop

6:40 am - 11:45 am

STL

ISP

4h 05m

1 stop

$328Southwest

Fri, Jun 12 - Sun, Jun 14

4:30 pm - 11:40 pm

ISP

STL

8h 10m

2 stops

2:25 pm - 11:20 pm

STL

ISP

7h 55m

2 stops

$344Southwest

Thu, May 14 - Sat, May 16

5:38 pm - 9:29 am

ISP

MCI

16h 51m

1 stop

6:24 pm - 4:47 pm

MCI

ISP

21h 23m

2 stops

$393Multiple Airlines

Tue, May 12 - Mon, May 18

5:38 pm - 9:29 am

ISP

MCI

16h 51m

1 stop

2:34 pm - 10:05 am

MCI

ISP

18h 31m

2 stops

$416Multiple Airlines

Tue, May 12 - Tue, May 19

Southwest flights from Islip, New York to Missouri

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

Southwest

May 8

ISP6:00 amIslip Long Island

5h 50m

1 stop

STL10:50 amLambert-St Louis

May 12

STL6:35 amLambert-St Louis

4h 20m

1 stop

ISP11:55 amIslip Long Island

$286

Southwest

May 8

ISP4:30 pmIslip Long Island

7h 45m

2 stops

STL11:15 pmLambert-St Louis

May 12

STL6:35 amLambert-St Louis

6h 15m

1 stop

ISP1:50 pmIslip Long Island

$291

Southwest

May 8

ISP4:30 pmIslip Long Island

7h 45m

2 stops

STL11:15 pmLambert-St Louis

May 12

STL12:40 pmLambert-St Louis

8h 30m

2 stops

ISP10:10 pmIslip Long Island

$296

Frontier flights from Islip, New York to Missouri

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

Frontier

Apr 11

ISP5:02 pmIslip Long Island

7h 23m

1 stop

STL11:25 pmLambert-St Louis

Apr 13

STL8:41 amLambert-St Louis

9h 08m

1 stop

ISP6:49 pmIslip Long Island

$351

Frontier

Apr 10

ISP11:51 amIslip Long Island

13h 07m

1 stop

STL11:58 pmLambert-St Louis

Apr 13

STL8:41 amLambert-St Louis

9h 08m

1 stop

ISP6:49 pmIslip Long Island

$410

Frontier

Apr 12

ISP7:59 pmIslip Long Island

12h 52m

1 stop

STL7:51 amLambert-St Louis

Apr 15

STL4:59 pmLambert-St Louis

15h 34m

1 stop

ISP9:33 amIslip Long Island

$482

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Fri 5/8

6:00 am-10:50 am

1 stop5h 50m

Lambert-St Louis

Tue 5/12

6:35 am-11:55 am

1 stop4h 20m

$286

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Fri 5/8

4:30 pm-11:15 pm

2 stops7h 45m

Lambert-St Louis

Tue 5/12

6:35 am-1:50 pm

1 stop6h 15m

$291

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Fri 5/8

4:30 pm-11:15 pm

2 stops7h 45m

Lambert-St Louis

Tue 5/12

12:40 pm-10:10 pm

2 stops8h 30m

$296

Quickest round-trip

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Fri 5/1

6:00 am-10:50 am

1 stop5h 50m

Lambert-St Louis

Fri 5/8

11:15 am-4:30 pm

1 stop4h 15m

$313

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Fri 5/1

8:35 am-1:50 pm

1 stop6h 15m

Lambert-St Louis

Fri 5/8

7:20 am-4:30 pm

2 stops8h 10m

$318

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Fri 5/1

4:30 pm-11:40 pm

2 stops8h 10m

Lambert-St Louis

Fri 5/8

2:25 pm-11:30 pm

2 stops8h 05m

$323

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Fri 6/12

5:50 pm-11:10 pm

1 stop6h 20m

Lambert-St Louis

Sun 6/14

6:40 am-11:45 am

1 stop4h 05m

$328

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Thu 5/14

4:30 pm-11:40 pm

2 stops8h 10m

Lambert-St Louis

Sat 5/16

2:25 pm-11:20 pm

2 stops7h 55m

$344

IslipKansas City

ISP - MCI

ISPMCI

Islip Long Island

Tue 5/12

5:38 pm-9:29 am

1 stop16h 51m

Kansas City

Mon 5/18

6:24 pm-4:47 pm

2 stops21h 23m

$393

IslipKansas City

ISP - MCI

ISPMCI

Islip Long Island

Tue 5/12

5:38 pm-9:29 am

1 stop16h 51m

Kansas City

Tue 5/19

2:34 pm-10:05 am

2 stops18h 31m

$416

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 and Southwest are the most popular carriers operating from Islip Long Island to Missouri

What airlines fly to Missouri?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Missouri from Islip, New York according to our data. United Airlines is the first choice among our users, with 37% 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	5h 20m
Direct flights	None

The fastest flight from Islip, New York to Missouri takes 5h 20m

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

Frequently asked questions about flying from Islip, New York to Missouri

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 April 2026, 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 $317	Free Cancellation	Rating 8.0 4,340 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.