HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$122+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
IND — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Indianapolis to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Indianapolis to Ontario are usually found in August or July, booked 30 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 June 12, 2025.

Round-trip from

$257
(CheapOair)

One-way from

$122
(FlightHub)

Popular in

December

Cheapest in

August

Average price

$437
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 ($77 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

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 June 12, 2025.

This CheapOair deal was found by Cheapflights users on 6/9. 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 8/26:00 amIND - ONT
1 stop6h 09mFrontier
Wed 9/312:59 amONT - IND
1 stop11h 32mFrontier
Deal found 6/9$257
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/56:30 amIND - ONT
1 stop11h 16mAlaska Airlines
Tue 8/194:00 pmONT - IND
1 stop10h 00mAlaska Airlines
Deal found 6/10$296
This Southwest deal was found by Cheapflights users on 6/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/47:30 amIND - ONT
1 stop6h 15mSouthwest
Fri 7/115:05 pmONT - IND
1 stop5h 50mSouthwest
Deal found 6/11$338
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/122:30 pmIND - ONT
1 stop7h 24mAmerican Airlines
Sat 9/2010:54 amONT - IND
1 stop6h 29mAmerican Airlines
Deal found 6/11$341
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/911:42 amIND - ONT
2 stops9h 18mUnited Airlines
Sun 12/146:02 amONT - IND
1 stop6h 55mUnited Airlines
Deal found 6/11$362
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/264:50 pmIND - ONT
1 stop8h 35mDelta
Tue 7/15:08 pmONT - IND
2 stops13h 33mDelta
Deal found 6/11$402

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 June 12, 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

Sat 8/2

6:00 am-9:09 am

1 stop6h 09m

Ontario

Wed 9/3

12:59 am-3:31 pm

1 stop11h 32m

$257

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Tue 8/5

6:30 am-2:46 pm

1 stop11h 16m

Ontario

Tue 8/19

4:00 pm-5:00 am

1 stop10h 00m

$296

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Fri 7/4

7:30 am-10:45 am

1 stop6h 15m

Ontario

Fri 7/11

5:05 pm-1:55 am

1 stop5h 50m

$338

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Fri 9/12

2:30 pm-6:54 pm

1 stop7h 24m

Ontario

Sat 9/20

10:54 am-8:23 pm

1 stop6h 29m

$341

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Thu 8/7

11:46 am-10:52 pm

2 stops14h 06m

Ontario

Mon 8/11

7:00 am-5:53 pm

1 stop7h 53m

$392

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Thu 6/26

4:50 pm-10:25 pm

1 stop8h 35m

Ontario

Tue 7/1

5:08 pm-9:41 am

2 stops13h 33m

$402

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Mon 8/18

6:00 am-9:13 am

1 stop6h 13m

$122

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Tue 7/1

6:38 pm-9:38 pm

1 stop6h 00m

$130

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Sun 8/31

6:55 pm-11:59 pm

1 stop8h 04m

$139

IndianapolisOntario

IND - ONT

INDONT

Indianapolis

Tue 7/15

5:05 pm-9:52 pm

1 stop7h 47m

$140

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 14 results
1
2

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 June 9, 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 30 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 June 12, 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 June 12, 2025.
To help decide which airline to fly from Indianapolis to Ontario, see what other customers have to say about Alaska Airlines, Southwest and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Food

7.1

Comfort

7.8

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Food

7.1

Comfort

7.8

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Food

7.1

Comfort

7.8

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Food

7.1

Comfort

7.8

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Food

7.1

Comfort

7.8

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Food

7.1

Comfort

7.8

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 $257 on this airline. Additional options worth looking into are Alaska Airlines and Southwest, starting at $296 and $338 round-trip. These flights start at 36% 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 $122 on Frontier. Other airlines that offer cheap prices include American Airlines from $130 and Alaska Airlines from $139 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 $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

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 Indianapolis to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Las Vegas flights
O'Hare Intl to Los Angeles flights
O'Hare Intl to San Francisco flights
O'Hare Intl to Santa Ana flights
O'Hare Intl to San Diego flights
O'Hare Intl to Ontario flights
Midway to Las Vegas flights
Cincinnati to Las Vegas flights
O'Hare Intl to Burbank flights
Midway to Los Angeles flights
Indianapolis to Las Vegas flights
Midway to San Francisco flights
O'Hare Intl to Oakland flights
O'Hare Intl to Sacramento flights
O'Hare Intl to San Jose flights
O'Hare Intl to Reno flights
Louisville to Las Vegas flights
Cincinnati to San Francisco flights
Cincinnati to Los Angeles flights
Indianapolis to Los Angeles flights
O'Hare Intl to Palm Springs flights
Indianapolis to San Francisco flights
Midway to San Diego flights
Midway to Ontario flights
Midway to Santa Ana flights
Indianapolis to San Diego flights
Cincinnati to Santa Ana flights
Cincinnati to Ontario flights
Rockford to Las Vegas flights
Dayton to Las Vegas flights
Louisville to Los Angeles flights
Indianapolis to Santa Ana flights
Midway to Reno flights
O'Hare Intl to Fresno flights
Midway to Oakland flights
Indianapolis to Burbank flights
Cincinnati to San Diego flights
Cincinnati to Sacramento flights
Dayton to San Francisco flights
Midway to San Jose flights
Dayton to Los Angeles flights
O'Hare Intl to Santa Barbara flights
South Bend to Las Vegas flights
Cincinnati to San Jose flights
Fort Wayne to Las Vegas flights
O'Hare Intl to Long Beach flights
Midway to Palm Springs flights
Indianapolis to Oakland flights
Midway to Long Beach flights

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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$148Average$238FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$236Average$424FlexibilityNo cancel feeOn-time71%
DeltaCheapest$306Average$384FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$332Average$448FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$342Average$494FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.