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$105+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
JAX — ONT
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheapflights Tip: The best prices from Jacksonville to Ontario are usually found in April or July, booked 57 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 July 3, 2025.

Round-trip from

$266
(Booking.com)

One-way from

$105
(Mytrip)

Popular in

February

Cheapest in

April

Average price

$371
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. 14% potential increase in price ($72 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 3, 2025.

This Booking.com deal was found by Cheapflights users on 7/3. 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.
Mon 7/287:05 pmJAX - ONT
1 stop17h 04mFrontier
Thu 7/318:09 pmONT - JAX
1 stop18h 54mFrontier
Deal found 7/3$266
This United Airlines deal was found by Cheapflights users on 7/1. 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 7/298:45 amJAX - ONT
1 stop6h 47mUnited Airlines
Tue 8/56:00 amONT - JAX
1 stop8h 50mUnited Airlines
Deal found 7/1$345
This Southwest deal was found by Cheapflights users on 7/2. 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.
Wed 9/171:20 pmJAX - ONT
1 stop8h 30mSouthwest
Sat 9/205:35 amONT - JAX
1 stop8h 05mSouthwest
Deal found 7/2$351
This American Airlines deal was found by Cheapflights users on 7/1. 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.
Tue 7/298:55 amJAX - ONT
2 stops10h 19mAmerican Airlines
Tue 8/512:55 pmONT - JAX
2 stops8h 24mAmerican Airlines
Deal found 7/1$355
This Delta deal was found by Cheapflights users on 7/2. 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 9/1712:45 pmJAX - ONT
2 stops12h 55mDelta
Sat 9/209:50 amONT - JAX
2 stops11h 05mDelta
Deal found 7/2$361
This JetBlue deal was found by Cheapflights users on 6/30. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/112:24 pmJAX - ONT
1 stop10h 46mJetBlue
Mon 8/1811:59 pmONT - JAX
1 stop10h 30mJetBlue
Deal found 6/30$371

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 July 3, 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

Mon 7/28

7:05 pm-9:09 am

1 stop17h 04m

Ontario

Thu 7/31

8:09 pm-6:03 pm

1 stop18h 54m

$266

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Tue 7/29

8:45 am-12:32 pm

1 stop6h 47m

Ontario

Tue 8/5

6:00 am-5:50 pm

1 stop8h 50m

$345

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Wed 9/17

1:20 pm-6:50 pm

1 stop8h 30m

Ontario

Sat 9/20

5:35 am-4:40 pm

1 stop8h 05m

$351

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Tue 7/29

8:55 am-4:14 pm

2 stops10h 19m

Ontario

Tue 8/5

12:55 pm-12:19 am

2 stops8h 24m

$355

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Wed 9/17

12:45 pm-10:40 pm

2 stops12h 55m

Ontario

Sat 9/20

9:50 am-11:55 pm

2 stops11h 05m

$361

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Mon 8/11

2:24 pm-10:10 pm

1 stop10h 46m

Ontario

Mon 8/18

11:59 pm-1:29 pm

1 stop10h 30m

$371

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Mon 8/4

7:05 pm-9:09 am

1 stop17h 04m

$105

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Sun 7/27

8:26 pm-9:13 am

2 stops15h 47m

$159

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Fri 8/8

2:24 pm-10:10 pm

1 stop10h 46m

$161

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Sat 11/8

8:00 am-12:33 pm

1 stop7h 33m

$169

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

Showing 1-10 of 13 results
1
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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 June 27, 2025.

Booking 57 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 $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 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 July 3, 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 July 3, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United 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
4,270 reviews

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.0
Very good
4,270 reviews
Southwest
8.0
Very good
4,270 reviews

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Delta
8.0
Very good
7,970 reviews
Southwest
8.0
Very good
4,270 reviews

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,845 reviews
Southwest
8.0
Very good
4,270 reviews

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
JetBlue
7.3
Good
2,916 reviews
Southwest
8.0
Very good
4,270 reviews

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,270 reviews

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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.

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

    According to our current data, Frontier ($266), United Airlines ($345), and Southwest ($351) offers the cheapest pricing from Jacksonville to Ontario. Frontier is priced at 39% lower than the current average price of a flight leaving 3 months from now.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $105. However, be on the lookout for offers from JetBlue and United Airlines, as they are both options that can get you from Jacksonville to Ontario for a low price.

  • 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 $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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Top 4 airlines flying from Jacksonville to Ontario

Discover the top 4 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$204Average$565FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$228Average$371FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$337Average$428FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$351Average$421FlexibilityNo cancel feeOn-time63%

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