How long is the flight from Islip to Indianapolis?

A quick flight from Islip to Indianapolis can take about 4h 40m. Frontier provides one of the quickest options available for as low as $373. The distance from Islip to Indianapolis is about 699 mi. This flight may include one or multiple stops.

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

Cheapflights users have booked flights from Islip to Indianapolis round-trip from $271. Southwest is currently priced 25% below the average price you’ll pay for this route.

In terms of precipitation, rainfall in Indianapolis ranges from 2.3 - 5.1 inches per month. May is typically the wettest month, when rainfall can reach 5.1 in. February is typically the driest time to visit Indianapolis when rainfall is around 2.3 in.

If weather is an important factor for your trip to Indianapolis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 28.4 F).

How far in advance should I book a flight from Islip to Indianapolis?

To save on the cost of your flight from Islip to Indianapolis, book at least 53 days before your planned departure. Booking around this time can save you about 71% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $264 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $344.

What is the cheapest month to fly from Islip to Indianapolis?

February can be a great time to fly to Indianapolis from Islip with a flight ticket averaging about $267. Cheapflights users have found deals in the month of February for as cheap as $59. The most expensive prices can be found in the month of May.

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

Unlike at noon, when flights are generally more expensive, you can save up to 32% on flights from Islip to Indianapolis by exploring options for tickets in the morning.

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

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

How can I find direct flights from Islip to Indianapolis?

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

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

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

$79+ Flights from Islip to Indianapolis

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

Airfare is below average for this route at the moment. Islip to Indianapolis flights typically cost between $276 and $344 in November. The cheapest round-trip price found within the last 3 days was $223 on Frontier (Nov 7-Nov 9).

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Cheap flight deals from Islip to Indianapolis

Round-trip from	$223 (Frontier)
One-way from	$79 (Cheapflightsfares)
Popular in	December
Cheapest in	March
Average price	$281

From Islip Long Island to Indianapolis

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One-way flight from Islip Long Island to Indianapolis

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Highest demand for flights based on searches. 19% potential increase in price ($86 potential increase over avg. RT price).

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Cheapest flight prices on average. 4% potential price decrease ($18 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 Islip to Indianapolis

Cheapest flights from Islip to Indianapolis
Explore the most affordable flight options available from Islip to Indianapolis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Fri 11/72:47 pmISP - IND

1 stop6h 32mFrontier

Sun 11/910:21 pmIND - ISP

1 stop12h 16mFrontier

Deal found 9/14

$223

Sun 9/282:19 pmISP - IND

2 stops26h 51mMultiple Airlines

Thu 10/26:53 pmIND - ISP

1 stop15h 47mMultiple Airlines

Deal found 9/12

$304

Fri 10/175:30 amISP - IND

1 stop4h 40mSouthwest

Tue 10/215:40 amIND - ISP

1 stop6h 45mSouthwest

Deal found 9/13

$373

Thu 9/1811:40 amISP - IND

1 stop6h 18mFrontier

Mon 9/228:54 pmIND - ISP

2 stops13h 46mFrontier

Deal found 9/12

$397

Best flights from Islip to Indianapolis
Discover carefully curated flight deals from Islip to Indianapolis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2025.

Fri 11/72:47 pmISP - IND

1 stop6h 32mFrontier

Sun 11/910:21 pmIND - ISP

1 stop12h 16mFrontier

Deal found 9/14

$223

Sun 9/282:19 pmISP - IND

2 stops26h 51mMultiple Airlines

Thu 10/26:53 pmIND - ISP

1 stop15h 47mMultiple Airlines

Deal found 9/12

$304

Fri 10/175:30 amISP - IND

1 stop4h 40mSouthwest

Tue 10/215:40 amIND - ISP

1 stop6h 45mSouthwest

Deal found 9/13

$373

Last-minute flights from Islip to Indianapolis
Discover last-minute flight deals from Islip to Indianapolis. Data last updated September 15, 2025 and is based on user searches.

Thu 9/1811:40 amISP - IND

1 stop6h 18mFrontier

Mon 9/228:54 pmIND - ISP

2 stops13h 46mFrontier

Deal found 9/12

$397

Sun 9/282:19 pmISP - IND

2 stops26h 51mMultiple Airlines

Thu 10/26:53 pmIND - ISP

1 stop15h 47mMultiple Airlines

Deal found 9/12

$304

Fri 10/175:30 amISP - IND

1 stop4h 40mSouthwest

Tue 10/215:40 amIND - ISP

1 stop6h 45mSouthwest

Deal found 9/13

$373

One-way flights from Islip to Indianapolis
Search for one-way flight options from Islip to Indianapolis. Find affordable one-way fares based on user searches. Data last updated September 15, 2025.

Thu 9/2511:40 amISP - IND

1 stop6h 18mFrontier

Deal found 9/13

$79

Fri 12/1910:16 amISP - IND

1 stop7h 07mFrontier

Deal found 9/13

$323

Cheapflights Fare Finder

Use the filters below to find and compare flights from Islip to Indianapolis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipIndianapolis

ISP - IND

ISPIND

Islip Long Island

Fri 11/7

2:47 pm-9:19 pm

1 stop6h 32m

Indianapolis

Sun 11/9

10:21 pm-10:37 am

1 stop12h 16m

$223

IslipIndianapolis

ISP - IND

ISPIND

Islip Long Island

Sun 9/28

2:19 pm-5:10 pm

2 stops26h 51m

Indianapolis

Thu 10/2

6:53 pm-10:40 am

1 stop15h 47m

$304

IslipIndianapolis

ISP - IND

ISPIND

Islip Long Island

Fri 10/17

5:30 am-10:10 am

1 stop4h 40m

Indianapolis

Tue 10/21

5:40 am-12:25 pm

1 stop6h 45m

$373

IslipIndianapolis

ISP - IND

ISPIND

Islip Long Island

Thu 9/25

11:40 am-5:58 pm

1 stop6h 18m

$79

IslipIndianapolis

ISP - IND

ISPIND

Islip Long Island

Fri 12/19

10:16 am-5:23 pm

1 stop7h 07m

$323

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Best time to book a flight from Islip to Indianapolis

Have a flexible travel schedule? Discover the best time to fly to Indianapolis from Islip 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 Islip to Indianapolis

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

Currently, August is the cheapest month in which you can book a flight from Islip to Indianapolis (average of $286). Flying from Islip to Indianapolis in March is currently the most expensive (average of $360). 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.

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

Reviews of airlines servicing Indianapolis

See what other customers who have flown with Southwest from Islip to Indianapolis 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

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

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

How long is the flight from Islip to Indianapolis?
A quick flight from Islip to Indianapolis can take about 4h 40m. Frontier provides one of the quickest options available for as low as $373. The distance from Islip to Indianapolis is about 699 mi. This flight may include one or multiple stops.
What is the cheapest airline to fly from Islip to Indianapolis round-trip?
Cheapflights users have booked flights from Islip to Indianapolis round-trip from $271. Southwest is currently priced 25% below the average price you’ll pay for this route.
Can I find deals for flights from Islip to Indianapolis that include hotel bookings?
Yes. In addition to deals on Islip to Indianapolis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Islip to Indianapolis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Indianapolis.
Can I find deals for business class flights from Islip to Indianapolis?
Yes. Cheapflights offers flight deals from Islip to Indianapolis 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 Islip to Indianapolis?
Currently, August is the cheapest month in which you can book a flight from Islip to Indianapolis (average of $286). Flying from Islip to Indianapolis in March is currently the most expensive (average of $360). 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

Muncie

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Fishers

Anderson

Kokomo

Greenwood

Bloomington

Franklin

Plainfield

Carmel

Crawfordsville

Speedway

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Top airline flying from Islip to Indianapolis

Airline	Cheapest	Average	Flexibility	On-time
Southwest	Cheapest$271	Average$346	FlexibilityNo cancel fee	On-time63%

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$79+ Cheap flights from Islip to Indianapolis (ISP - IND)

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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Islip to Indianapolis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Islip to Indianapolis

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Islip to Indianapolis

Cheapest flights from Islip to IndianapolisExplore the most affordable flight options available from Islip to Indianapolis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Explore the most affordable flight options available from Islip to Indianapolis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Islip to Indianapolis that are best for you.

Best time to book a flight from Islip to Indianapolis

Have a flexible travel schedule? Discover the best time to fly to Indianapolis from Islip with our price prediction graph.

Cheapflights Insights

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

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

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

Reviews of airlines servicing Indianapolis

See what other customers who have flown with Southwest from Islip to Indianapolis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Islip to Indianapolis. 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 Islip to Indianapolis?

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

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

How can I find direct flights from Islip to Indianapolis?

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

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

Traveling to a place near Indianapolis?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Islip to Indianapolis

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Islip to Indianapolis

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Book with Flexibility

Travel Smart

Cheapest flights from Islip to Indianapolis
Explore the most affordable flight options available from Islip to Indianapolis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.