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$117+ 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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — JAX
Aug 30 — Sep 61
Sun 8/30
Sun 9/6
1 adult, Economy
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Cheap 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 July 31, 2026.

This Delta deal was found by Cheapflights users on 7/27. 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.
Tue 8/2512:00 pm
ONT
-
JAX
1 stop8h 55m
Delta
Tue 9/16:00 am
JAX
-
ONT
1 stop7h 42m
Delta
Deal found 7/27$323
This Southwest deal was found by Cheapflights users on 7/29. 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 8/268:35 am
ONT
-
JAX
2 stops8h 50m
Southwest
Wed 9/22:05 pm
JAX
-
ONT
1 stop7h 50m
Southwest
Deal found 7/29$328
This Southwest deal was found by Cheapflights users on 7/28. 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 9/168:35 am
ONT
-
JAX
2 stops8h 55m
Southwest
Wed 10/212:25 pm
JAX
-
ONT
2 stops9h 55m
Southwest
Deal found 7/28$338
This United Airlines deal was found by Cheapflights users on 7/26. 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.
Sat 8/225:00 am
ONT
-
JAX
1 stop7h 33m
United Airlines
Sat 8/299:25 am
JAX
-
ONT
2 stops13h 36m
United Airlines
Deal found 7/26$369
This Southwest deal was found by Cheapflights users on 7/28. 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.
Tue 12/229:30 pm
ONT
-
JAX
2 stops10h 15m
Southwest
Tue 12/295:35 am
JAX
-
ONT
1 stop6h 35m
Southwest
Deal found 7/28$372
This Kiwi.com deal was found by Cheapflights users on 7/27. 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.
Tue 8/183:40 pm
ONT
-
JAX
1 stop25h 05m
Multiple Airlines
Fri 8/217:05 pm
JAX
-
ONT
2 stops26h 56m
Multiple Airlines
Deal found 7/27$374
This Southwest deal was found by Cheapflights users on 7/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:15 am
ONT
-
JAX
2 stops10h 20m
Southwest
Thu 9/35:50 am
JAX
-
ONT
1 stop6h 25m
Southwest
Deal found 7/30$375
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 9/188:24 pm
ONT
-
JAX
1 stop20h 38m
Multiple Airlines
Fri 9/257:46 pm
JAX
-
ONT
2 stops31h 01m
Multiple Airlines
Deal found 7/29$377

Find 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 July 31, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$323
(Delta)

One-way from

$117
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$546
Provider with most accurate pricing for Ontario-Jacksonville flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Jacksonville flights.
Search Deals
From Ontario to Jacksonville
Search Deals
One-way flight from Ontario to Jacksonville
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($24 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 July 31, 2026.
Use the filters below to find and compare flights from Ontario to Jacksonville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Thu 8/27

5:00 am-3:33 pm

1 stop7h 33m

Jacksonville

Thu 9/3

4:45 pm-10:35 pm

1 stop8h 50m

$323

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Wed 9/16

8:35 am-8:30 pm

2 stops8h 55m

Jacksonville

Wed 10/21

2:25 pm-9:20 pm

2 stops9h 55m

$338
Quickest round-trip

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Tue 12/22

12:50 pm-12:05 am

1 stop8h 15m

Jacksonville

Tue 12/29

5:35 am-9:10 am

1 stop6h 35m

$383

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Thu 10/1

2:40 pm-11:40 pm

1 stop6h 00m

Jacksonville

Sun 10/4

2:50 pm-9:35 pm

2 stops9h 45m

$410

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Mon 9/14

10:00 pm-10:08 am

1 stop9h 08m

Jacksonville

Mon 9/21

5:34 pm-10:24 pm

1 stop7h 50m

$420

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Wed 10/28

6:00 am-6:00 pm

1 stop9h 00m

Jacksonville

Wed 11/4

3:44 pm-9:40 pm

1 stop8h 56m

$433

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Fri 11/6

7:00 am-5:57 pm

1 stop7h 57m

Jacksonville

Wed 11/11

9:20 am-6:01 pm

2 stops11h 41m

$485

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Sat 8/22

5:00 am-3:33 pm

1 stop7h 33m

Jacksonville

Wed 8/26

4:45 pm-6:11 pm

2 stops28h 26m

$514

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Sun 10/25

5:00 am-3:03 pm

1 stop7h 03m

Jacksonville

Sat 10/31

11:35 am-8:51 pm

2 stops12h 16m

$520

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Tue 8/18

7:00 am-7:25 pm

1 stop9h 25m

Jacksonville

Sat 8/22

8:15 am-12:50 pm

1 stop7h 35m

$535

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Compare providers for flights from Ontario to Jacksonville

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Jacksonville in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Jacksonville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Jacksonville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Jacksonville flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Jacksonville flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Jacksonville flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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?

Booking 43 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, January is the cheapest month in which you can book a flight from Ontario to Jacksonville (average of $368). Flying from Ontario to Jacksonville in December is currently the most expensive (average of $583). 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.

How much does it cost to fly round-trip from Ontario to Jacksonville?

Airfare is below average for this route at the moment.

Ontario to Jacksonville flights typically cost between $432 and $585 in August.
The cheapest round-trip price found within the last 5 days was $323 on Delta (Aug 25-Sep 1).

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 July 31, 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from Ontario to Jacksonville have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,226 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Overall

8.0

Food

7.0

Reviews

1 / 20
6.0
Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.
Southwest
8.0
Very good
4,226 reviews
Southwest
8.0
Very good
4,226 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Overall

8.0

Food

7.0

Reviews

1 / 20
6.0
Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.
Delta
7.8
Good
8,494 reviews
Southwest
8.0
Very good
4,226 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Overall

8.0

Food

7.0

Reviews

1 / 20
6.0
Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.
United Airlines
7.4
Good
10,053 reviews
Southwest
8.0
Very good
4,226 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Overall

8.0

Food

7.0

Reviews

1 / 20
6.0
Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.
American Airlines
7.1
Good
11,846 reviews
Southwest
8.0
Very good
4,226 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Overall

8.0

Food

7.0

Reviews

1 / 20
6.0
Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

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.

  • How long is the flight from Ontario to Jacksonville?

    There are many flights that can get you from Ontario to Jacksonville in 7h 33m. Fly via United Airlines, Southwest, or Delta to get the fastest option. Airlines will cover a distance of 2100 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 $302. Additional round-trip tickets that might be worth considering are offered by United Airlines and American Airlines, with the lowest prices starting at $330 and $336, respectively. These flights start at 37% 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 Southwest, with whom users have recently found tickets for as low as $130. However, be on the lookout for offers from Frontier and American 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, January is the cheapest month in which you can book a flight from Ontario to Jacksonville (average of $368). Flying from Ontario to Jacksonville in December is currently the most expensive (average of $583). 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 Jacksonville?

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

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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 July 31, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$302Average$442FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$330Average$368FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$336Average$470FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$350Average$522FlexibilityNo cancel feeOn-time63%

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