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$73+ 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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
IND — ONT
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
1 adult, Economy
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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 January 8, 2026.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$144
(Frontier)

One-way from

$73
(Booking.com)

Popular in

December

Cheapest in

July

Average price

$448
Provider with most accurate pricing for Indianapolis-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Indianapolis-Ontario flights.
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From Indianapolis to Ontario
Search Deals
One-way flight from Indianapolis to Ontario
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($79 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 8, 2026.

This Frontier deal was found by Cheapflights users on 1/7. 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 2/54:30 pmIND - ONT
1 stop10h 50mFrontier
Thu 2/126:05 amONT - IND
1 stop11h 02mFrontier
Deal found 1/7$144
This Frontier deal was found by Cheapflights users on 1/7. 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.
Sat 3/148:33 pmIND - ONT
1 stop6h 28mFrontier
Wed 3/186:15 amONT - IND
1 stop10h 23mFrontier
Deal found 1/7$150
This CheapOair deal was found by Cheapflights users on 1/7. 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 3/218:33 pmIND - ONT
1 stop6h 28mFrontier
Sat 3/286:15 amONT - IND
1 stop10h 23mFrontier
Deal found 1/7$151
This Frontier deal was found by Cheapflights users on 1/8. 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.
Mon 3/210:05 amIND - ONT
1 stop7h 25mFrontier
Sat 3/76:15 amONT - IND
1 stop10h 23mFrontier
Deal found 1/8$160
This Mytrip deal was found by Cheapflights users on 1/7. 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.
Mon 2/2310:05 amIND - ONT
1 stop7h 25mFrontier
Thu 2/266:05 amONT - IND
1 stop10h 52mFrontier
Deal found 1/7$163
This Frontier deal was found by Cheapflights users on 1/7. 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.
Sun 2/14:30 pmIND - ONT
1 stop10h 50mFrontier
Thu 2/56:20 amONT - IND
1 stop6h 15mFrontier
Deal found 1/7$177
This Frontier deal was found by Cheapflights users on 1/7. 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 3/198:33 pmIND - ONT
1 stop6h 26mFrontier
Wed 3/256:15 amONT - IND
1 stop10h 23mFrontier
Deal found 1/7$185
This Frontier deal was found by Cheapflights users on 1/7. 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 1/224:30 pmIND - ONT
1 stop10h 50mFrontier
Sun 1/256:20 amONT - IND
1 stop6h 15mFrontier
Deal found 1/7$190

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 January 8, 2026.
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

Mon 2/23

10:05 am-2:30 pm

1 stop7h 25m

Ontario

Thu 2/26

6:05 am-7:57 pm

1 stop10h 52m

$144

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Wed 1/28

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Mon 2/2

6:00 am-7:05 pm

1 stop10h 05m

$267

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Wed 1/28

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Thu 2/5

6:00 am-7:05 pm

1 stop10h 05m

$267

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Wed 2/4

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Sun 2/8

6:00 am-7:05 pm

1 stop10h 05m

$280

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Mon 2/23

1:57 pm-10:07 pm

2 stops11h 10m

Ontario

Tue 3/3

12:18 pm-12:18 am

2 stops9h 00m

$283

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Fri 1/30

6:35 am-12:16 pm

1 stop8h 41m

Ontario

Tue 2/3

10:30 pm-8:59 am

1 stop7h 29m

$285

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Fri 1/30

4:24 pm-9:05 pm

1 stop7h 41m

Ontario

Thu 2/5

1:11 pm-10:49 pm

1 stop6h 38m

$285

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Sun 2/8

6:35 am-12:16 pm

1 stop8h 41m

Ontario

Mon 2/9

10:30 pm-8:59 am

1 stop7h 29m

$285

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Sat 2/7

6:35 am-12:16 pm

1 stop8h 41m

Ontario

Mon 2/9

10:30 pm-10:36 am

1 stop9h 06m

$285

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Tue 1/27

6:35 am-12:16 pm

1 stop8h 41m

Ontario

Sun 2/1

1:11 pm-10:49 pm

1 stop6h 38m

$285

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 22 results
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2
3

Compare providers for flights from Indianapolis to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Indianapolis to Ontario in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
MytripPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Indianapolis-Ontario flights, users find the pricing of Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on Indianapolis-Ontario flight deals on Cheapflights vs. Mytrip >95% of the time. Price accuracy is based on data collected from Indianapolis-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Indianapolis-Ontario flights, Cheapflights users trust Mytrip the most. Mytrip has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Indianapolis-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 January 2, 2026.

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 26 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 $96). Flying from Indianapolis to Ontario in January is currently the most expensive (average of $180). 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.

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 January 8, 2026.
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
4,250 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Overall

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
4,250 reviews
Southwest
8.0
Very good
4,250 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Overall

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
7.9
Good
8,025 reviews
Southwest
8.0
Very good
4,250 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Overall

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
9,139 reviews
Southwest
8.0
Very good
4,250 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Overall

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
11,095 reviews
Southwest
8.0
Very good
4,250 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Overall

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
5.7
Fair
3,062 reviews
Southwest
8.0
Very good
4,250 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Overall

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.

  • How long is the flight from Indianapolis to Ontario?

    Frontier and Alaska Airlines can get you from Indianapolis to Ontario in just under 7h 25m. Your travel time can differ by up to 3h 43m. The distance between Indianapolis and Ontario is about 1763 mi. This flight may include one or multiple stops.

  • 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 $155 on this airline. Additional options worth looking into are Delta and United Airlines, starting at $183 and $271 round-trip. These flights start at 60% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Indianapolis to Ontario one-way?

    One-way options have recently been found by users for as low as $100 on Frontier. Other airlines that offer cheap prices include United Airlines from $137 and American Airlines from $138 one-way.

  • 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 $96). Flying from Indianapolis to Ontario in January is currently the most expensive (average of $180). 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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$150Average$231FlexibilityNo cancel feeOn-time62%
DeltaCheapest$183Average$346FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$271Average$424FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$319Average$421FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$324Average$407FlexibilityNo cancel feeOn-time71%

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