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$149+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
JAX — ONT
juin 17 — juin 241
mar. 6/17
mar. 6/24
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 juin 12, 2025.

Round-trip from

$297
(American Airlines)

One-way from

$149
(Delta)

Popular in

February

Cheapest in

April

Average price

$457
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 June 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 juin 12, 2025.

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.
mar. 8/124:47 pmJAX - ONT
1 stop7h 23mAmerican Airlines
mar. 8/196:10 amONT - JAX
1 stop6h 33mAmerican Airlines
Deal found 6/11$297
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 9/67:20 amJAX - ONT
1 stop6h 15mDelta
sam. 9/1312:00 pmONT - JAX
1 stop9h 02mDelta
Deal found 6/10$315
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.
mar. 7/16:00 amJAX - ONT
1 stop7h 25mSouthwest
mer. 7/91:00 pmONT - JAX
1 stop6h 20mSouthwest
Deal found 6/11$363
This Booking.com deal was found by Cheapflights users on 6/12. 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.
lun. 7/217:05 pmJAX - ONT
1 stop17h 04mFrontier
jeu. 7/248:09 pmONT - JAX
1 stop18h 54mFrontier
Deal found 6/12$370
This JetBlue 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/183:04 pmJAX - ONT
1 stop10h 26mJetBlue
ven. 8/2211:45 pmONT - JAX
1 stop11h 17mJetBlue
Deal found 6/10$381
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.
mar. 8/129:10 amJAX - ONT
2 stops11h 15mUnited Airlines
mar. 8/191:15 pmONT - JAX
1 stop6h 54mUnited Airlines
Deal found 6/11$402
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/82:24 pmJAX - ONT
2 stops12h 35mAlaska Airlines
lun. 9/157:22 pmONT - JAX
2 stops14h 49mAlaska Airlines
Deal found 6/11$527

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 juin 12, 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

mar. 8/12

4:47 pm-9:10 pm

1 stop7h 23m

Ontario

mar. 8/19

6:10 am-3:43 pm

1 stop6h 33m

$297

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

sam. 9/6

7:20 am-10:35 am

1 stop6h 15m

Ontario

sam. 9/13

12:00 pm-12:02 am

1 stop9h 02m

$315

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

mar. 7/1

6:00 am-10:25 am

1 stop7h 25m

Ontario

mer. 7/9

1:00 pm-10:20 pm

1 stop6h 20m

$363

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

lun. 7/21

7:05 pm-9:09 am

1 stop17h 04m

Ontario

jeu. 7/24

8:09 pm-6:03 pm

1 stop18h 54m

$370

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

lun. 8/18

3:04 pm-10:30 pm

1 stop10h 26m

Ontario

ven. 8/22

11:45 pm-2:02 pm

1 stop11h 17m

$381

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

mar. 8/12

9:10 am-5:25 pm

2 stops11h 15m

Ontario

mar. 8/19

1:15 pm-11:09 pm

1 stop6h 54m

$402

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

lun. 9/8

2:24 pm-11:59 pm

2 stops12h 35m

Ontario

lun. 9/15

7:22 pm-1:11 pm

2 stops14h 49m

$527

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

lun. 8/18

6:44 pm-10:20 pm

1 stop6h 36m

$149

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

mar. 8/5

5:40 am-12:00 pm

2 stops9h 20m

$154

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

lun. 8/18

3:04 pm-10:30 pm

1 stop10h 26m

$161

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 14 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 9, 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 juin 12, 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.

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 juin 12, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Jacksonville to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

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

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

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

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

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

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
JetBlue
7.3
Good
2,925 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

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 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, American Airlines ($297), Delta ($315), and Southwest ($363) offers the cheapest pricing from Jacksonville to Ontario. American Airlines is priced at 32% 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 Delta, with whom users have recently found tickets for as low as $149. However, be on the lookout for offers from American Airlines and JetBlue, 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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Alternative routes for Jacksonville to Ontario

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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 juin 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$204Average$595FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$228Average$373FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$341Average$427FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$351Average$421FlexibilityNo cancel feeOn-time63%

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