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$75+ Cheap flights from Indianapolis to Ontario (IND - ONT)

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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
IND — ONT
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Indianapolis to Ontario are usually found in July or August, booked 44 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap flight deals from Indianapolis to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Indianapolis (IND) to Ontario (ONT). 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 August 14, 2025.

Round-trip from

$150
(CheapOair)

One-way from

$75
(CheapOair)

Popular in

December

Cheapest in

July

Average price

$360
From Indianapolis to Ontario
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One-way flight from Indianapolis to Ontario
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Highest demand for flights based on searches. 18% potential increase in price ($89 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Indianapolis to Ontario

Cheapest flights from Indianapolis to Ontario
Explore the most affordable flight options available from Indianapolis to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This CheapOair deal was found by Cheapflights users on 8/14. 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 9/48:54 pmIND - ONT
1 stop13h 29mFrontier
Fri 9/128:59 pmONT - IND
1 stop16h 15mFrontier
Deal found 8/14$150
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/48:54 pmIND - ONT
1 stop13h 29mFrontier
Thu 9/114:14 pmONT - IND
1 stop23h 30mFrontier
Deal found 8/14$163
This FlightHub deal was found by Cheapflights users on 8/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/58:54 pmIND - ONT
1 stop26h 00mFrontier
Sun 9/77:15 pmONT - IND
1 stop20h 10mFrontier
Deal found 8/14$169
This Mytrip deal was found by Cheapflights users on 8/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/48:54 pmIND - ONT
1 stop26h 00mFrontier
Sun 9/74:09 pmONT - IND
1 stop23h 16mFrontier
Deal found 8/14$171
This CheapOair deal was found by Cheapflights users on 8/13. 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.
Thu 10/168:51 pmIND - ONT
1 stop5h 59mFrontier
Sat 10/187:04 amONT - IND
1 stop6h 25mFrontier
Deal found 8/13$172
This Booking.com deal was found by Cheapflights users on 8/13. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/268:58 pmIND - ONT
1 stop25h 56mFrontier
Sun 9/287:15 pmONT - IND
1 stop20h 10mFrontier
Deal found 8/13$173
This CheapOair deal was found by Cheapflights users on 8/14. 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 8/288:59 pmIND - ONT
1 stop5h 51mFrontier
Thu 9/43:43 pmONT - IND
1 stop25h 21mFrontier
Deal found 8/14$190
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/155:24 pmIND - ONT
1 stop9h 26mFrontier
Sun 10/1910:47 pmONT - IND
2 stops12h 04mFrontier
Deal found 8/14$192
This Mytrip deal was found by Cheapflights users on 8/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/234:25 pmIND - ONT
1 stop19h 20mFrontier
Sun 8/245:09 pmONT - IND
1 stop24h 05mFrontier
Deal found 8/14$200
This Mytrip deal was found by Cheapflights users on 8/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/228:59 pmIND - ONT
1 stop5h 51mFrontier
Sun 8/245:09 pmONT - IND
1 stop24h 05mFrontier
Deal found 8/14$201

Cheapflights Fare Finder

 
Customize your flight search to find flights from Indianapolis to Ontario 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 August 14, 2025.
Use the filters below to find and compare flights from Indianapolis to Ontario that are best for you.

Fly from

Indianapolis

Fly to

Ontario

Route

Depart

Return

Price

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Fri 11/7

8:39 pm-11:50 pm

1 stop6h 11m

Ontario

Mon 11/10

6:53 am-7:44 pm

1 stop9h 51m

$150

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Fri 10/3

8:58 pm-7:54 pm

1 stop25h 56m

Ontario

Sun 10/5

8:59 pm-8:04 pm

1 stop20h 05m

$150

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Sat 9/13

5:01 pm-7:23 am

1 stop17h 22m

Ontario

Thu 9/18

3:43 pm-8:04 pm

1 stop25h 21m

$150

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Thu 10/2

8:54 pm-7:53 am

1 stop13h 59m

Ontario

Sun 10/5

3:43 pm-8:04 pm

1 stop25h 21m

$150

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Fri 9/19

8:58 pm-7:54 pm

1 stop25h 56m

Ontario

Thu 9/25

8:59 pm-8:04 pm

1 stop20h 05m

$150

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Thu 9/4

8:54 pm-7:23 am

1 stop13h 29m

Ontario

Fri 9/5

4:08 pm-4:14 pm

1 stop21h 06m

$150

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Sat 9/13

5:01 pm-7:23 am

1 stop17h 22m

Ontario

Fri 9/19

8:59 pm-4:14 pm

1 stop16h 15m

$150

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Thu 9/11

8:54 pm-7:23 am

1 stop13h 29m

Ontario

Thu 9/18

3:43 pm-8:04 pm

1 stop25h 21m

$150

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Fri 10/17

8:51 pm-11:50 pm

1 stop5h 59m

Ontario

Mon 10/20

6:53 am-8:06 pm

1 stop10h 13m

$150

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Thu 9/4

8:54 pm-7:23 am

1 stop13h 29m

Ontario

Fri 9/12

8:59 pm-4:14 pm

1 stop16h 15m

$150

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 22 results
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Best time to book a flight from Indianapolis to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario 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 Ontario

How far ahead should I book a flight from Indianapolis to Ontario?

Use this chart to determine the optimal time to book a round-trip flight from Indianapolis to Ontario. Price data was last updated on August 8, 2025.

The price you pay for your flight from Indianapolis to Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 44 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, August is the cheapest month in which you can book a flight from Indianapolis to Ontario (average of $246). Flying from Indianapolis to Ontario in March is currently the most expensive (average of $328). 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 ONT?

Find hourly flight availability from Indianapolis to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 18% on flights from Indianapolis to Ontario by exploring options for tickets at noon.

What is the cheapest day to fly from Indianapolis to Ontario?

Use this chart to determine the cheapest time to fly round-trip from Indianapolis to Ontario. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Indianapolis to Ontario flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated August 14, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from Indianapolis to Ontario 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
4,244 reviews

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,980 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,916 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,217 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

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

  • What are the cheapest airlines flying from Indianapolis to Ontario round-trip?

    Our cheapest airline available from Indianapolis to Ontario is Frontier. Our recent data shows that you can find tickets from as low as $148 on this airline. Additional options worth looking into are Delta and Southwest, starting at $230 and $320 round-trip. These flights start at 63% lower than the current average price 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Indianapolis to Ontario 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 Ontario?

    Currently, August is the cheapest month in which you can book a flight from Indianapolis to Ontario (average of $246). Flying from Indianapolis to Ontario in March is currently the most expensive (average of $328). 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

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Alternative routes for Indianapolis to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Indianapolis to Ontario

Discover the top 5 airlines that operate flights from Indianapolis to Ontario. 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$148Average$212FlexibilityNo cancel feeOn-time62%
DeltaCheapest$230Average$376FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$320Average$436FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$324Average$550FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$328Average$437FlexibilityNo cancel feeOn-time71%

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