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Cheap flights from Islip to Missouri from $80

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip to Missouri departing on 10/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Islip to Missouri

Cheap round-trip flights

Frontier Logo
6:37 pm - 1:17 pmISP-STL
19h 40m1 stop
Frontier Logo
7:45 pm - 10:37 amSTL-ISP
13h 52m2 stops
$201Frontier
Find Deal
Thu, Oct 30 - Tue, Nov 4
Frontier Logo
6:37 pm - 3:57 pmISP-STL
22h 20m2 stops
Frontier Logo
7:45 pm - 10:37 amSTL-ISP
13h 52m2 stops
$220Frontier
Find Deal
Thu, Oct 30 - Tue, Nov 4
Frontier Logo
6:37 pm - 10:17 amISP-MCI
16h 40m2 stops
Frontier Logo
11:12 am - 9:09 amMCI-ISP
20h 57m2 stops
$229Frontier
Find Deal
Thu, Oct 30 - Sun, Nov 2
Frontier Logo
6:37 pm - 3:57 pmISP-STL
22h 20m2 stops
Frontier Logo
7:45 pm - 10:37 amSTL-ISP
13h 52m2 stops
$232Frontier
Find Deal
Thu, Oct 30 - Tue, Nov 4
Southwest Logo
5:30 am - 11:30 amISP-STL
7h 00m1 stop
Southwest Logo
12:05 pm - 9:40 pmSTL-ISP
8h 35m1 stop
$241Southwest
Find Deal
Thu, Oct 30 - Tue, Nov 4
Frontier Logo
4:58 pm - 9:07 amISP-STL
17h 09m2 stops
Frontier Logo
1:41 pm - 8:52 pmSTL-ISP
6h 11m1 stop
$277Frontier
Find Deal
Wed, Oct 15 - Sun, Oct 19
Southwest Logo
3:40 pm - 7:30 pmISP-STL
4h 50m1 stop
Southwest Logo
5:05 pm - 11:50 pmSTL-ISP
5h 45m1 stop
$282Southwest
Find Deal
Sat, Dec 6 - Sun, Dec 7
Southwest Logo
1:30 pm - 9:10 pmISP-STL
8h 40m2 stops
Southwest Logo
5:05 pm - 11:50 pmSTL-ISP
5h 45m1 stop
$287Southwest
Find Deal
Sat, Dec 6 - Sun, Dec 7
Multiple Airlines Logo
5:05 pm - 9:59 pmISP-MCI
29h 54m1 stop
Multiple Airlines Logo
5:11 pm - 8:42 pmMCI-ISP
26h 31m2 stops
$443Multiple Airlines
Find Deal
Sat, Oct 4 - Mon, Oct 6
Southwest Logo
6:05 am - 12:10 pmISP-MCI
7h 05m1 stop
Southwest Logo
5:45 am - 2:35 pmMCI-ISP
7h 50m1 stop
$767Southwest
Find Deal
Sat, Oct 4 - Mon, Oct 6

Frontier flights from Islip to Missouri

Our best Frontier deals on Islip to Missouri flight tickets
Frontier
Oct 30
ISP6:37 pmIslip Long Island
19h 40m
1 stop
STL1:17 pmLambert-St Louis
Nov 4
STL7:45 pmLambert-St Louis
13h 52m
2 stops
ISP10:37 amIslip Long Island
$201
Find similar
Frontier
Oct 30
ISP6:37 pmIslip Long Island
22h 20m
2 stops
STL3:57 pmLambert-St Louis
Nov 4
STL7:45 pmLambert-St Louis
13h 52m
2 stops
ISP10:37 amIslip Long Island
$220
Find similar
Frontier
Oct 30
ISP6:37 pmIslip Long Island
16h 40m
2 stops
MCI10:17 amKansas City
Nov 2
MCI11:12 amKansas City
20h 57m
2 stops
ISP9:09 amIslip Long Island
$229
Find similar

Southwest flights from Islip to Missouri

Our best Southwest deals on Islip to Missouri flight tickets
Southwest
Oct 30
ISP5:30 amIslip Long Island
7h 00m
1 stop
STL11:30 amLambert-St Louis
Nov 4
STL12:05 pmLambert-St Louis
8h 35m
1 stop
ISP9:40 pmIslip Long Island
$241
Find similar
Southwest
Dec 6
ISP3:40 pmIslip Long Island
4h 50m
1 stop
STL7:30 pmLambert-St Louis
Dec 7
STL5:05 pmLambert-St Louis
5h 45m
1 stop
ISP11:50 pmIslip Long Island
$282
Find similar
Southwest
Dec 6
ISP1:30 pmIslip Long Island
8h 40m
2 stops
STL9:10 pmLambert-St Louis
Dec 7
STL5:05 pmLambert-St Louis
5h 45m
1 stop
ISP11:50 pmIslip Long Island
$287
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated September 24, 2025.
Use the filters below to find and compare flights from Islip to Missouri that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Thu 10/30

6:37 pm-1:17 pm

1 stop19h 40m

Lambert-St Louis

Tue 11/4

7:45 pm-10:37 am

2 stops13h 52m

$201

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Thu 10/30

6:37 pm-3:57 pm

2 stops22h 20m

Lambert-St Louis

Tue 11/4

7:45 pm-10:37 am

2 stops13h 52m

$220

IslipKansas City

ISP - MCI

ISPMCI

Islip Long Island

Thu 10/30

6:37 pm-10:17 am

2 stops16h 40m

Kansas City

Sun 11/2

11:12 am-9:09 am

2 stops20h 57m

$229

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Thu 10/30

6:37 pm-3:57 pm

2 stops22h 20m

Lambert-St Louis

Tue 11/4

7:45 pm-10:37 am

2 stops13h 52m

$232

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Thu 10/30

5:30 am-11:30 am

1 stop7h 00m

Lambert-St Louis

Tue 11/4

12:05 pm-9:40 pm

1 stop8h 35m

$241

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Wed 10/15

4:58 pm-9:07 am

2 stops17h 09m

Lambert-St Louis

Sun 10/19

1:41 pm-8:52 pm

1 stop6h 11m

$277

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Sat 12/6

3:40 pm-7:30 pm

1 stop4h 50m

Lambert-St Louis

Sun 12/7

5:05 pm-11:50 pm

1 stop5h 45m

$282

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Sat 12/6

1:30 pm-9:10 pm

2 stops8h 40m

Lambert-St Louis

Sun 12/7

5:05 pm-11:50 pm

1 stop5h 45m

$287

IslipKansas City

ISP - MCI

ISPMCI

Islip Long Island

Sat 10/4

5:05 pm-9:59 pm

1 stop29h 54m

Kansas City

Mon 10/6

5:11 pm-8:42 pm

2 stops26h 31m

$443

IslipKansas City

ISP - MCI

ISPMCI

Islip Long Island

Sat 10/4

6:05 am-12:10 pm

1 stop7h 05m

Kansas City

Mon 10/6

5:45 am-2:35 pm

1 stop7h 50m

$767

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Missouri from

How to get the cheapest flight ticket from Islip 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?

Delta, United Airlines and American Airlines are the top three most popular airlines that fly to Missouri from Islip according to our data. Delta is the first choice among our users, with 34% 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 to Missouri flight deals and tips

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

Direct flights

None
There are no direct flights from Islip to Missouri. There are no popular flight routes from Islip 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?

  • 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 to Missouri

Compare and see reviews for airlines that fly from Islip to Missouri with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $304Free CancellationRating
8.0
4,244 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.

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