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$123+ Cheap flights from Jacksonville to Ontario (JAX - 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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
JAX — ONT
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheapflights Tip: The best prices from Jacksonville to Ontario are usually found in October or September, booked 38 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap flight deals from Jacksonville to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Jacksonville (JAX) 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 September 17, 2025.

Round-trip from

$225
(Frontier)

One-way from

$123
(Kiwi.com)

Popular in

August

Cheapest in

October

Average price

$347
From Jacksonville to Ontario
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One-way flight from Jacksonville to Ontario
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Highest demand for flights based on searches. 6% potential increase in price ($32 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($24 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 Jacksonville to Ontario

Cheapest flights from Jacksonville to Ontario
Explore the most affordable flight options available from Jacksonville to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

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.
Thu 11/610:38 pmJAX - ONT
2 stops22h 50mFrontier
Mon 11/108:24 amONT - JAX
1 stop6h 45mFrontier
Deal found 9/15$225
This Frontier deal was found by Cheapflights users on 9/16. 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 10/166:03 pmJAX - ONT
2 stops16h 46mFrontier
Thu 10/2310:30 amONT - JAX
2 stops21h 22mFrontier
Deal found 9/16$280
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 11/77:04 pmJAX - ONT
2 stops31h 46mFrontier
Mon 11/108:24 amONT - JAX
1 stop6h 45mFrontier
Deal found 9/15$311
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/228:32 amJAX - ONT
1 stop8h 11mAmerican Airlines
Wed 10/2911:59 pmONT - JAX
1 stop8h 42mAmerican Airlines
Deal found 9/15$317
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/224:01 pmJAX - ONT
1 stop9h 21mDelta
Wed 10/297:35 amONT - JAX
2 stops13h 24mDelta
Deal found 9/15$322
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/84:01 pmJAX - ONT
1 stop9h 21mDelta
Mon 10/1310:00 pmONT - JAX
1 stop7h 59mDelta
Deal found 9/15$334
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/85:20 pmJAX - ONT
1 stop7h 16mAmerican Airlines
Mon 10/1311:59 pmONT - JAX
2 stops8h 45mAmerican Airlines
Deal found 9/15$339
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/256:00 amJAX - ONT
1 stop7h 26mDelta
Mon 10/2710:00 pmONT - JAX
1 stop9h 06mDelta
Deal found 9/15$351
This American Airlines deal was found by Cheapflights users on 9/16. 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.
Sat 10/117:59 amJAX - ONT
1 stop7h 02mAmerican Airlines
Sat 10/1812:47 pmONT - JAX
1 stop6h 11mAmerican Airlines
Deal found 9/16$353
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/253:25 pmJAX - ONT
2 stops8h 25mSouthwest
Mon 10/2712:55 pmONT - JAX
1 stop7h 05mSouthwest
Deal found 9/15$356

Cheapflights Fare Finder

 
Customize your flight search to find flights from Jacksonville 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 September 17, 2025.
Use the filters below to find and compare flights from Jacksonville to Ontario that are best for you.

Fly from

Jacksonville

Fly to

Ontario

Route

Depart

Return

Price

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Tue 12/9

6:38 pm-11:03 pm

1 stop7h 25m

Ontario

Wed 12/17

11:45 am-8:40 pm

1 stop5h 55m

$317

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Wed 10/22

4:01 pm-10:22 pm

1 stop9h 21m

Ontario

Wed 10/29

7:35 am-11:59 pm

2 stops13h 24m

$322

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Wed 10/8

4:01 pm-10:22 pm

1 stop9h 21m

Ontario

Mon 10/13

10:00 pm-8:59 am

1 stop7h 59m

$334

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Sat 12/6

3:57 pm-10:04 pm

1 stop9h 07m

Ontario

Wed 12/17

11:45 am-8:40 pm

1 stop5h 55m

$334

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Sun 12/7

6:10 am-10:40 am

1 stop7h 30m

Ontario

Wed 12/17

11:45 am-8:40 pm

1 stop5h 55m

$377

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Wed 12/10

6:38 pm-11:03 pm

1 stop7h 25m

Ontario

Sun 12/21

10:29 pm-8:41 am

1 stop7h 12m

$377

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Tue 12/9

5:10 am-12:22 pm

2 stops10h 12m

Ontario

Sun 12/21

10:29 pm-8:41 am

1 stop7h 12m

$382

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Mon 12/8

4:02 pm-11:59 pm

2 stops10h 57m

Ontario

Wed 12/17

11:45 am-8:40 pm

1 stop5h 55m

$393

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Mon 12/8

6:38 pm-11:03 pm

1 stop7h 25m

Ontario

Sun 12/21

10:29 pm-8:41 am

1 stop7h 12m

$394

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Tue 12/23

6:49 pm-10:59 pm

1 stop7h 10m

$159

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 20 results
1
2

Best time to book a flight from Jacksonville to Ontario

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

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

Use this chart to determine the optimal time to book a round-trip flight from Jacksonville to Ontario. Price data was last updated on September 12, 2025.

Booking 37 days in advance of your planned departure date is, on average, the best time to get cheap flights from Jacksonville to Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, August is the cheapest month in which you can book a flight from Jacksonville to Ontario (average of $246). Flying from Jacksonville to Ontario in March is currently the most expensive (average of $327). 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 JAX to ONT?

Find hourly flight availability from Jacksonville 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 September 17, 2025.

A simple way to save on the total cost of your ticket is to fly from Jacksonville to Ontario at noon. If you’re flexible enough to do this you can expect to save up to 27% on your trip compared to booking a flight in the evening.

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 September 17, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and American Airlines from Jacksonville to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
7,961 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
4,242 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

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 Jacksonville 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 Jacksonville to Ontario?

    There are many flights that can get you from Jacksonville to Ontario in 7h 25m. Fly via Delta to get the fastest option. The distance from Jacksonville to Ontario is about 2100 mi.

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

    According to our current data, Delta ($204), American Airlines ($342), and Southwest ($351) offers the cheapest pricing from Jacksonville to Ontario. Delta is priced at 55% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Jacksonville to Ontario (average of $246). Flying from Jacksonville to Ontario in March is currently the most expensive (average of $327). 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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Top 3 airlines flying from Jacksonville to Ontario

Discover the top 3 airlines that operate flights from Jacksonville 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$204Average$538FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$342Average$442FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$351Average$416FlexibilityNo cancel feeOn-time63%

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