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Cheap flights from Islip, New York to Indianapolis from $125

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, New York to Indianapolis departing on 8/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Islip, New York to Indianapolis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
10:57 am - 6:38 pm
ISP
-
IND
7h 41m
1 stop
Frontier Logo
10:26 am - 4:58 pm
IND
-
ISP
6h 32m
1 stop
$249Frontier
Tue, Sep 8 - Thu, Sep 10
Frontier Logo
10:57 am - 6:38 pm
ISP
-
IND
7h 41m
1 stop
Frontier Logo
9:59 pm - 9:53 am
IND
-
ISP
11h 54m
1 stop
$250Frontier
Wed, Aug 19 - Thu, Aug 20
Frontier Logo
10:57 am - 6:38 pm
ISP
-
IND
7h 41m
1 stop
Frontier Logo
12:15 pm - 9:53 am
IND
-
ISP
21h 38m
1 stop
$264Frontier
Fri, Aug 21 - Mon, Aug 24
Frontier Logo
5:43 pm - 10:25 am
ISP
-
IND
16h 42m
1 stop
Frontier Logo
7:41 pm - 4:58 pm
IND
-
ISP
21h 17m
1 stop
$277Frontier
Thu, Sep 10 - Sun, Sep 13
Frontier Logo
10:57 am - 9:14 pm
ISP
-
IND
10h 17m
1 stop
Frontier Logo
9:59 pm - 9:53 am
IND
-
ISP
11h 54m
1 stop
$284Frontier
Thu, Aug 27 - Thu, Sep 3
Frontier Logo
5:43 pm - 10:25 am
ISP
-
IND
16h 42m
1 stop
Frontier Logo
7:48 pm - 4:58 pm
IND
-
ISP
21h 10m
2 stops
$294Frontier
Sun, Sep 13 - Wed, Sep 16
Frontier Logo
5:43 pm - 10:25 am
ISP
-
IND
16h 42m
1 stop
Frontier Logo
11:21 am - 4:58 pm
IND
-
ISP
29h 37m
1 stop
$296Frontier
Sun, Sep 13 - Wed, Sep 16
Frontier Logo
10:57 am - 6:38 pm
ISP
-
IND
7h 41m
1 stop
Frontier Logo
9:59 pm - 9:53 am
IND
-
ISP
11h 54m
1 stop
$298Frontier
Wed, Aug 19 - Thu, Aug 20
Frontier Logo
10:57 am - 6:48 pm
ISP
-
IND
7h 51m
1 stop
Frontier Logo
12:15 pm - 6:14 pm
IND
-
ISP
5h 59m
1 stop
$300Frontier
Sat, Sep 5 - Mon, Sep 7
Southwest Logo
6:10 am - 2:50 pm
ISP
-
IND
8h 40m
2 stops
Southwest Logo
5:25 am - 9:40 am
IND
-
ISP
4h 15m
1 stop
$314Southwest
Thu, Sep 24 - Mon, Sep 28

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Southwest flights from Islip, New York to Indianapolis

Our best Southwest deals on Islip, New York to Indianapolis flight tickets
Southwest
Sep 24
ISP6:10 amIslip Long Island
8h 40m
2 stops
IND2:50 pmIndianapolis
Sep 28
IND5:25 amIndianapolis
4h 15m
1 stop
ISP9:40 amIslip Long Island
$314
Southwest
Sep 24
ISP6:10 amIslip Long Island
8h 40m
2 stops
IND2:50 pmIndianapolis
Sep 28
IND7:20 amIndianapolis
14h 50m
2 stops
ISP10:10 pmIslip Long Island
$325
Southwest
Sep 24
ISP6:45 amIslip Long Island
6h 55m
1 stop
IND1:40 pmIndianapolis
Sep 28
IND5:25 amIndianapolis
4h 15m
1 stop
ISP9:40 amIslip Long Island
$353

Frontier flights from Islip, New York to Indianapolis

Our best Frontier deals on Islip, New York to Indianapolis flight tickets
Frontier
Sep 8
ISP10:57 amIslip Long Island
7h 41m
1 stop
IND6:38 pmIndianapolis
Sep 10
IND10:26 amIndianapolis
6h 32m
1 stop
ISP4:58 pmIslip Long Island
$249
Frontier
Aug 19
ISP10:57 amIslip Long Island
7h 41m
1 stop
IND6:38 pmIndianapolis
Aug 20
IND9:59 pmIndianapolis
11h 54m
1 stop
ISP9:53 amIslip Long Island
$250
Frontier
Aug 21
ISP10:57 amIslip Long Island
7h 41m
1 stop
IND6:38 pmIndianapolis
Aug 24
IND12:15 pmIndianapolis
21h 38m
1 stop
ISP9:53 amIslip Long Island
$264

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York to Indianapolis 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 July 30, 2026.
Use the filters below to find and compare flights from Islip, New York to Indianapolis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipIndianapolis

ISP - IND

ISPIND

Islip Long Island

Tue 9/8

10:57 am-6:38 pm

1 stop7h 41m

Indianapolis

Thu 9/10

10:26 am-4:58 pm

1 stop6h 32m

$249

IslipIndianapolis

ISP - IND

ISPIND

Islip Long Island

Wed 8/19

10:57 am-6:38 pm

1 stop7h 41m

Indianapolis

Thu 8/20

9:59 pm-9:53 am

1 stop11h 54m

$250

IslipIndianapolis

ISP - IND

ISPIND

Islip Long Island

Fri 8/21

10:57 am-6:38 pm

1 stop7h 41m

Indianapolis

Mon 8/24

12:15 pm-9:53 am

1 stop21h 38m

$264

IslipIndianapolis

ISP - IND

ISPIND

Islip Long Island

Thu 9/10

5:43 pm-10:25 am

1 stop16h 42m

Indianapolis

Sun 9/13

7:41 pm-4:58 pm

1 stop21h 17m

$277

IslipIndianapolis

ISP - IND

ISPIND

Islip Long Island

Thu 8/27

10:57 am-9:14 pm

1 stop10h 17m

Indianapolis

Thu 9/3

9:59 pm-9:53 am

1 stop11h 54m

$284

IslipIndianapolis

ISP - IND

ISPIND

Islip Long Island

Sun 9/13

5:43 pm-10:25 am

1 stop16h 42m

Indianapolis

Wed 9/16

7:48 pm-4:58 pm

2 stops21h 10m

$294

IslipIndianapolis

ISP - IND

ISPIND

Islip Long Island

Sun 9/13

5:43 pm-10:25 am

1 stop16h 42m

Indianapolis

Wed 9/16

11:21 am-4:58 pm

1 stop29h 37m

$296

IslipIndianapolis

ISP - IND

ISPIND

Islip Long Island

Wed 8/19

10:57 am-6:38 pm

1 stop7h 41m

Indianapolis

Thu 8/20

9:59 pm-9:53 am

1 stop11h 54m

$298

IslipIndianapolis

ISP - IND

ISPIND

Islip Long Island

Sat 9/5

10:57 am-6:48 pm

1 stop7h 51m

Indianapolis

Mon 9/7

12:15 pm-6:14 pm

1 stop5h 59m

$300
Quickest round-trip

IslipIndianapolis

ISP - IND

ISPIND

Islip Long Island

Thu 9/24

6:10 am-2:50 pm

2 stops8h 40m

Indianapolis

Mon 9/28

5:25 am-9:40 am

1 stop4h 15m

$314

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Indianapolis from

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

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 day to depart on your flight to Indianapolis?

Our data shows that Saturday is the least expensive day to fly to Indianapolis. Tickets to fly out on this day can be as low as $310. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Indianapolis on Monday is $488.

What is the cheapest time of day to depart on your flight to Indianapolis?

Flying to Indianapolis from Islip, New York at noon is the least expensive time of day to depart. momondo users have found prices as low as $344 when looking at flights departing at noon. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $363 on average. Flights to Indianapolis from Islip, New York in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Islip, New York to Indianapolis

Are you open to changing your travel dates? Check out the ideal times to fly from Islip, New York to Indianapolis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Islip, New York to Indianapolis (ISP to IND) flight deals and tips

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

Fastest flight time

4h 35m

Direct flights

None
The fastest flight from Islip, New York to Indianapolis takes 4h 35m
There are no direct flights from Islip, New York to Indianapolis. There are no popular flight routes from Islip, New York to Indianapolis.
Search flight deals

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

  • How far is Islip Long Island to Indianapolis by plane?

    There are 684.9 mi between Islip Long Island and Indianapolis. Flights usually cover this in 4h 35m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Islip Long Island Airport to Indianapolis Airport are refreshed on a daily basis.

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Islip Long Island Airport to Indianapolis Airport.

  • What documentation or ID do you need to fly to Indianapolis Airport?

    The travel and health documents you'll need for your trip to Indianapolis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Indianapolis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Indianapolis?

Book flights to Indianapolis if you plan to visit one of these locations
Terre Haute
Bloomington
Kokomo
Muncie
Anderson
Plainfield
Greenwood
Noblesville
Carmel
Speedway
Fishers
Franklin
West Lafayette
Westfield
Seymour
Shelbyville
Crawfordsville
Brownsburg
Greenfield
Mooresville

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Islip to Indianapolis. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for Islip to Indianapolis flights to just show those with flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to Indianapolis from Islip. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Islip to Indianapolis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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