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$174+ Cheap flights from Ontario to Jacksonville (ONT - JAX)

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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — JAX
Jun 19 — Jun 261
Thu 6/19
Thu 6/26
1 adult, Economy
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Cheapflights Tip: The best prices from Ontario to Jacksonville are usually found in August or November, booked 60 days in advance, depart on a Thursday or Monday and return on a Tuesday

Cheap flight deals from Ontario to Jacksonville

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Jacksonville (JAX). 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 14, 2025.

Round-trip from

$297
(Delta)

One-way from

$174
(Delta)

Popular in

March

Cheapest in

August

Average price

$427
From Ontario to Jacksonville
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One-way flight from Ontario to Jacksonville
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Highest demand for flights based on searches. 7% potential increase in price ($35 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 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 Ontario to Jacksonville

Cheapest flights from Ontario to Jacksonville
Explore the most affordable flight options available from Ontario to Jacksonville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 14, 2025.

This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/710:05 pmONT - JAX
1 stop8h 32mDelta
Tue 8/197:20 amJAX - ONT
1 stop6h 15mDelta
Deal found 6/12$297
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2812:22 pmONT - JAX
2 stops8h 57mAmerican Airlines
Wed 9/311:17 amJAX - ONT
2 stops10h 37mAmerican Airlines
Deal found 6/12$307
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/178:09 pmONT - JAX
1 stop18h 54mFrontier
Mon 7/217:05 pmJAX - ONT
1 stop17h 04mFrontier
Deal found 6/12$360
This Southwest deal was found by Cheapflights users on 6/13. 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.
Thu 9/186:20 amONT - JAX
1 stop12h 35mSouthwest
Sun 9/214:45 pmJAX - ONT
2 stops9h 40mSouthwest
Deal found 6/13$374
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/306:00 amONT - JAX
1 stop8h 50mUnited Airlines
Fri 8/17:25 amJAX - ONT
2 stops13h 00mUnited Airlines
Deal found 6/12$403
This Alaska Airlines deal was found by Cheapflights users on 6/13. 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.
Wed 8/136:58 pmONT - JAX
2 stops12h 25mAlaska Airlines
Mon 8/1811:37 amJAX - ONT
2 stops15h 22mAlaska Airlines
Deal found 6/13$587
This JetBlue 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/811:59 pmONT - JAX
1 stop10h 30mJetBlue
Fri 7/112:24 pmJAX - ONT
1 stop10h 35mJetBlue
Deal found 6/12$677

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Jacksonville 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 14, 2025.
Use the filters below to find and compare flights from Ontario to Jacksonville that are best for you.

Fly from

Ontario

Fly to

Jacksonville

Route

Depart

Return

Price

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Thu 8/7

10:05 pm-9:37 am

1 stop8h 32m

Jacksonville

Tue 8/19

7:20 am-10:35 am

1 stop6h 15m

$297

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Thu 8/28

12:22 pm-12:19 am

2 stops8h 57m

Jacksonville

Wed 9/3

11:17 am-6:54 pm

2 stops10h 37m

$307

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Thu 7/17

8:09 pm-6:03 pm

1 stop18h 54m

Jacksonville

Mon 7/21

7:05 pm-9:09 am

1 stop17h 04m

$360

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Thu 9/18

6:20 am-9:55 pm

1 stop12h 35m

Jacksonville

Sun 9/21

4:45 pm-11:25 pm

2 stops9h 40m

$374

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Wed 7/30

6:00 am-5:50 pm

1 stop8h 50m

Jacksonville

Fri 8/1

7:25 am-5:25 pm

2 stops13h 00m

$403

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Wed 8/13

6:58 pm-10:23 am

2 stops12h 25m

Jacksonville

Mon 8/18

11:37 am-11:59 pm

2 stops15h 22m

$587

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Tue 7/8

11:59 pm-1:29 pm

1 stop10h 30m

Jacksonville

Fri 7/11

2:24 pm-9:59 pm

1 stop10h 35m

$677

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Fri 7/4

11:49 am-9:34 pm

1 stop6h 45m

$174

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Tue 7/8

12:46 pm-10:34 pm

1 stop6h 48m

$190

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Sat 8/23

6:04 am-5:43 pm

1 stop8h 39m

$208

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 14 results
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Best time to book a flight from Ontario to Jacksonville

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

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

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Jacksonville. Price data was last updated on June 9, 2025.

Booking 4 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Jacksonville. 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 Ontario to Jacksonville?

Currently, August is the cheapest month in which you can book a flight from Ontario to Jacksonville (average of $278). Flying from Ontario to Jacksonville in March is currently the most expensive (average of $365). 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 ONT to JAX?

Find hourly flight availability from Ontario to Jacksonville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 14, 2025.

It’s optimal to fly from Ontario to Jacksonville in the afternoon. By choosing this option you can save up to 10% on the cost of your flight, compared to a flight in the morning.

Rainfall in Jacksonville by month

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

In terms of precipitation, rainfall in Jacksonville ranges from 2.1 - 8.2 inches per month. September is typically the wettest month, when rainfall can reach 8.2 in. November is typically the driest time to visit Jacksonville when rainfall is around 2.1 in.

Temperature in Jacksonville by month

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

If weather is an important factor for your trip to Jacksonville, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Jacksonville

Get insights into the airlines that provide service to Jacksonville. 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 Jacksonville. Reviews last updated June 14, 2025.
Read through reviews of airlines operating flights from Ontario to Jacksonville, such as Alaska Airlines, Southwest and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

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

Food

7.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

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
4,283 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

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
7,956 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

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
8,793 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

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
2,923 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

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 Ontario to Jacksonville. 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 Ontario to Jacksonville round-trip?

    Flying on Delta is currently your cheapest option to Jacksonville, with prices starting at $297. Additional round-trip tickets that might be worth considering are offered by American Airlines and Frontier, with the lowest prices starting at $307 and $360, respectively. These flights start at 33% lower than the current average price 3 months from now.

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

    The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $174. However, be on the lookout for offers from American Airlines and United Airlines, as they are both options that can get you from Ontario to Jacksonville for a low price.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Ontario to Jacksonville (average of $278). Flying from Ontario to Jacksonville in March is currently the most expensive (average of $365). 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

Traveling to a place near Ontario?

Book flights to Ontario if you plan to visit one of these locations
Jacksonville Beach
Orange Park
Kingsland
Waycross
Fernandina Beach

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Top 4 airlines flying from Ontario to Jacksonville

Discover the top 4 airlines that operate flights from Ontario to Jacksonville. 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 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$296Average$440FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$306Average$434FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$342Average$426FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$366Average$566FlexibilityNo cancel feeOn-time69%

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