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$85+ Cheap flights from Indianapolis to Islip (IND - ISP)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
IND — ISP
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Indianapolis to Islip

Discover tips and strategies to find the most affordable flight options for your journey from Indianapolis (IND) to Islip (ISP). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 16, 2025.

Round-trip from

$148
(CheapOair)

One-way from

$85
(CheapOair)

Popular in

October

Cheapest in

January

Average price

$433
From Indianapolis to Islip Long Island
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One-way flight from Indianapolis to Islip Long Island
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Highest demand for flights based on searches. 20% potential increase in price ($108 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Indianapolis to Islip

Cheapest flights from Indianapolis to Islip
Explore the most affordable flight options available from Indianapolis to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This CheapOair deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1310:00 pmIND - ISP
1 stop12h 37mFrontier
Sun 11/169:27 pmISP - IND
1 stop23h 52mFrontier
Deal found 9/15$148
This CheapOair deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/266:21 pmIND - ISP
1 stop16h 34mFrontier
Sun 9/289:49 amISP - IND
1 stop23h 58mFrontier
Deal found 9/14$155
This CheapOair deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1410:14 pmIND - ISP
1 stop12h 23mFrontier
Sun 11/169:27 pmISP - IND
1 stop23h 52mFrontier
Deal found 9/15$167
This CheapOair deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/276:26 pmIND - ISP
1 stop16h 14mFrontier
Sun 9/285:12 pmISP - IND
1 stop16h 35mFrontier
Deal found 9/15$208
This CheapOair deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/256:58 pmIND - ISP
1 stop15h 42mFrontier
Sun 9/289:49 amISP - IND
1 stop23h 58mFrontier
Deal found 9/15$209
This CheapOair deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/108:51 amIND - ISP
1 stop25h 46mFrontier
Sun 10/129:47 pmISP - IND
1 stop14h 30mFrontier
Deal found 9/15$218
This Frontier deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:52 pmIND - ISP
2 stops20h 45mFrontier
Sun 11/29:27 pmISP - IND
2 stops13h 02mFrontier
Deal found 9/15$227
This CheapOair deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/910:06 pmIND - ISP
1 stop12h 31mFrontier
Sun 10/129:47 pmISP - IND
1 stop23h 45mFrontier
Deal found 9/14$246
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/319:09 pmIND - ISP
1 stop13h 28mMultiple Airlines
Sun 11/29:27 pmISP - IND
1 stop11h 53mMultiple Airlines
Deal found 9/15$295
This CheapOair deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1212:08 pmIND - ISP
1 stop8h 06mFrontier
Sun 12/149:09 pmISP - IND
1 stop11h 30mFrontier
Deal found 9/13$306
This CheapOair deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/259:34 pmIND - ISP
1 stop23h 18mFrontier
Wed 10/294:58 pmISP - IND
1 stop15h 46mFrontier
Deal found 9/15$322

Cheapflights Fare Finder

 
Customize your flight search to find flights from Indianapolis to Islip 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, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Indianapolis to Islip that are best for you.

Fly from

Indianapolis

Fly to

Islip

Route

Depart

Return

Price

IndianapolisIslip

IND - ISP

INDISP

Indianapolis

Thu 11/13

10:00 pm-10:37 am

1 stop12h 37m

Islip Long Island

Sun 11/16

9:27 pm-9:19 pm

1 stop23h 52m

$148

IndianapolisIslip

IND - ISP

INDISP

Indianapolis

Thu 10/16

10:06 pm-10:37 am

1 stop12h 31m

Islip Long Island

Sun 10/19

9:47 pm-9:11 pm

1 stop23h 24m

$148

IndianapolisIslip

IND - ISP

INDISP

Indianapolis

Fri 9/26

6:21 pm-10:55 am

1 stop16h 34m

Islip Long Island

Sun 9/28

9:49 am-9:47 am

1 stop23h 58m

$155

IndianapolisIslip

IND - ISP

INDISP

Indianapolis

Fri 11/14

10:14 pm-10:37 am

1 stop12h 23m

Islip Long Island

Sun 11/16

9:27 pm-9:19 pm

1 stop23h 52m

$167

IndianapolisIslip

IND - ISP

INDISP

Indianapolis

Sat 9/27

6:26 pm-10:40 am

1 stop16h 14m

Islip Long Island

Sun 9/28

5:12 pm-9:47 am

1 stop16h 35m

$208

IndianapolisIslip

IND - ISP

INDISP

Indianapolis

Thu 9/25

6:58 pm-10:40 am

1 stop15h 42m

Islip Long Island

Sun 9/28

9:49 am-9:47 am

1 stop23h 58m

$209

IndianapolisIslip

IND - ISP

INDISP

Indianapolis

Fri 10/10

8:51 am-10:37 am

1 stop25h 46m

Islip Long Island

Sun 10/12

9:47 pm-12:17 pm

1 stop14h 30m

$218

IndianapolisIslip

IND - ISP

INDISP

Indianapolis

Fri 10/31

1:52 pm-10:37 am

2 stops20h 45m

Islip Long Island

Sun 11/2

9:27 pm-10:29 am

2 stops13h 02m

$227

IndianapolisIslip

IND - ISP

INDISP

Indianapolis

Fri 10/31

9:09 pm-10:37 am

1 stop13h 28m

Islip Long Island

Sun 11/2

9:27 pm-9:20 am

1 stop11h 53m

$295

IndianapolisIslip

IND - ISP

INDISP

Indianapolis

Fri 10/17

10:22 pm-10:37 am

1 stop12h 15m

$85

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 18 results
1
2

Best time to book a flight from Indianapolis to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Indianapolis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Indianapolis to Islip

What is the cheapest month to book a flight from Indianapolis to Islip?

Currently, January is the cheapest month in which you can book a flight from Indianapolis to Islip (average of $108). Flying from Indianapolis to Islip in November is currently the most expensive (average of $213). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IND to ISP?

Find hourly flight availability from Indianapolis to Islip. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 28% on flights from Indianapolis to Islip by exploring options for tickets in the morning.

How much does it cost to fly round-trip from Indianapolis to Islip?

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Islip. Reviews last updated September 16, 2025.
See what other customers who have flown with Southwest from Indianapolis to Islip have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Indianapolis to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Indianapolis to Islip?

    Airlines like Frontier fly from Indianapolis to Islip in about 12h 37m. The time it takes to get you to your destination can typically vary by up to . There are 699 mi between Indianapolis and Islip.

  • What is the cheapest airline to fly from Indianapolis to Islip round-trip?

    According to our current data, Southwest ($280), offers the cheapest pricing from Indianapolis to Islip. This flight start at 32% lower than the current average price 3 months from now.

  • Can I find deals for flights from Indianapolis to Islip that include hotel bookings?

    Yes. In addition to deals on Indianapolis to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Indianapolis to Islip?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Indianapolis to Islip.

  • Can I find deals for business class flights from Indianapolis to Islip?

    Yes. Cheapflights offers flight deals from Indianapolis to Islip by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Indianapolis to Islip?

    Currently, January is the cheapest month in which you can book a flight from Indianapolis to Islip (average of $108). Flying from Indianapolis to Islip in November is currently the most expensive (average of $213). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Islip?

Book flights to Islip if you plan to visit one of these locations
Riverhead
Southampton

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Alternative routes for Indianapolis to Islip

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Indianapolis to Islip

Discover the top airline that operate flights from Indianapolis to Islip. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$280Average$386FlexibilityNo cancel feeOn-time63%

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