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 February 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.

$164 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

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:01 pm - 11:59 pm

ISP

STL

12h 58m

1 stop

8:12 pm - 11:33 am

STL

ISP

38h 21m

2 stops

$259Frontier

sáb., feb. 28 - sáb., mar. 7

6:30 am - 12:50 pm

ISP

STL

7h 20m

2 stops

6:20 am - 11:35 am

STL

ISP

4h 15m

1 stop

$264Southwest

mié., may. 6 - sáb., may. 9

6:30 am - 12:50 pm

ISP

STL

7h 20m

2 stops

2:05 pm - 11:20 pm

STL

ISP

8h 15m

2 stops

$269Southwest

mié., may. 6 - sáb., may. 9

1:10 pm - 7:50 pm

ISP

STL

7h 40m

1 stop

5:00 am - 1:45 pm

STL

ISP

7h 45m

1 stop

$325Southwest

sáb., feb. 28 - sáb., mar. 7

1:10 pm - 9:10 pm

ISP

STL

9h 00m

2 stops

12:45 pm - 11:35 pm

STL

ISP

9h 50m

2 stops

$377Southwest

sáb., feb. 28 - sáb., mar. 7

12:40 pm - 5:30 pm

ISP

MCI

5h 50m

1 stop

6:00 am - 11:40 am

MCI

ISP

4h 40m

1 stop

$427Southwest

mar., mar. 3 - mar., mar. 10

3:45 pm - 9:25 pm

ISP

MCI

6h 40m

2 stops

6:45 am - 1:40 pm

MCI

ISP

5h 55m

1 stop

$432Southwest

mar., mar. 3 - mar., mar. 10

3:45 pm - 9:25 pm

ISP

MCI

6h 40m

2 stops

2:05 pm - 10:50 pm

MCI

ISP

7h 45m

2 stops

$437Southwest

mar., mar. 3 - mar., mar. 10

3:34 pm - 3:29 pm

ISP

MCI

24h 55m

1 stop

11:00 am - 11:10 am

MCI

ISP

23h 10m

2 stops

$463Multiple Airlines

lun., feb. 16 - vie., feb. 20

5:51 pm - 11:59 pm

ISP

STL

7h 08m

1 stop

9:05 pm - 10:03 am

STL

ISP

11h 58m

1 stop

$539Frontier

dom., mar. 1 - dom., mar. 8

Frontier flights from Islip, New York to Missouri

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

Frontier

Feb 28

ISP12:01 pmIslip Long Island

12h 58m

1 stop

STL11:59 pmLambert-St Louis

Mar 7

STL8:12 pmLambert-St Louis

38h 21m

2 stops

ISP11:33 amIslip Long Island

$259

Frontier

Mar 1

ISP5:51 pmIslip Long Island

7h 08m

1 stop

STL11:59 pmLambert-St Louis

Mar 8

STL9:05 pmLambert-St Louis

11h 58m

1 stop

ISP10:03 amIslip Long Island

$539

Southwest flights from Islip, New York to Missouri

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

Southwest

May 6

ISP6:30 amIslip Long Island

7h 20m

2 stops

STL12:50 pmLambert-St Louis

May 9

STL6:20 amLambert-St Louis

4h 15m

1 stop

ISP11:35 amIslip Long Island

$264

Southwest

May 6

ISP6:30 amIslip Long Island

7h 20m

2 stops

STL12:50 pmLambert-St Louis

May 9

STL2:05 pmLambert-St Louis

8h 15m

2 stops

ISP11:20 pmIslip Long Island

$269

Southwest

Feb 28

ISP1:10 pmIslip Long Island

7h 40m

1 stop

STL7:50 pmLambert-St Louis

Mar 7

STL5:00 amLambert-St Louis

7h 45m

1 stop

ISP1:45 pmIslip Long Island

$325

Fly from

Fly to

Route

Depart

Return

Price

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

sáb. 2/28

12:01 pm-11:59 pm

1 stop12h 58m

Lambert-St Louis

sáb. 3/7

8:12 pm-11:33 am

2 stops38h 21m

$259

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

mié. 5/6

6:30 am-12:50 pm

2 stops7h 20m

Lambert-St Louis

sáb. 5/9

6:20 am-11:35 am

1 stop4h 15m

$264

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

mié. 5/6

6:30 am-12:50 pm

2 stops7h 20m

Lambert-St Louis

sáb. 5/9

2:05 pm-11:20 pm

2 stops8h 15m

$269

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

sáb. 2/28

1:10 pm-7:50 pm

1 stop7h 40m

Lambert-St Louis

sáb. 3/7

5:00 am-1:45 pm

1 stop7h 45m

$325

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

sáb. 2/28

1:10 pm-9:10 pm

2 stops9h 00m

Lambert-St Louis

sáb. 3/7

12:45 pm-11:35 pm

2 stops9h 50m

$377

IslipKansas City

ISP - MCI

ISPMCI

Islip Long Island

mar. 3/3

12:40 pm-5:30 pm

1 stop5h 50m

Kansas City

mar. 3/10

6:00 am-11:40 am

1 stop4h 40m

$427

IslipKansas City

ISP - MCI

ISPMCI

Islip Long Island

mar. 3/3

3:45 pm-9:25 pm

2 stops6h 40m

Kansas City

mar. 3/10

6:45 am-1:40 pm

1 stop5h 55m

$432

IslipKansas City

ISP - MCI

ISPMCI

Islip Long Island

mar. 3/3

3:45 pm-9:25 pm

2 stops6h 40m

Kansas City

mar. 3/10

2:05 pm-10:50 pm

2 stops7h 45m

$437

IslipKansas City

ISP - MCI

ISPMCI

Islip Long Island

lun. 2/16

3:34 pm-3:29 pm

1 stop24h 55m

Kansas City

vie. 2/20

11:00 am-11:10 am

2 stops23h 10m

$463

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

dom. 3/1

5:51 pm-11:59 pm

1 stop7h 08m

Lambert-St Louis

dom. 3/8

9:05 pm-10:03 am

1 stop11h 58m

$539

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 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?

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 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	5h 50m
Direct flights	None

The fastest flight from Islip, New York to Missouri takes 5h 50m

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 February 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 $259	Free Cancellation	Rating 8.0 4,271 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.