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$136+ 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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — JAX
May 10 — May 171
Sun 5/10
Sun 5/17
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 April 10, 2026.

This United Airlines deal was found by Cheapflights users on 4/7. 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 5/66:00 am
ONT
-
JAX
1 stop7h 13m
United Airlines
Wed 5/135:25 pm
JAX
-
ONT
1 stop7h 33m
United Airlines
Deal found 4/7$306
This United Airlines deal was found by Cheapflights users on 4/8. 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 5/66:00 am
ONT
-
JAX
1 stop7h 13m
United Airlines
Sat 5/95:25 pm
JAX
-
ONT
1 stop7h 33m
United Airlines
Deal found 4/8$317
This Southwest deal was found by Cheapflights users on 4/7. 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 5/610:30 am
ONT
-
JAX
2 stops8h 45m
Southwest
Wed 5/136:30 am
JAX
-
ONT
2 stops10h 00m
Southwest
Deal found 4/7$321
This Delta deal was found by Cheapflights users on 4/6. 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 5/1310:00 pm
ONT
-
JAX
1 stop7h 41m
Delta
Thu 5/283:48 pm
JAX
-
ONT
1 stop9h 00m
Delta
Deal found 4/6$322
This American Airlines deal was found by Cheapflights users on 4/7. 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 5/132:08 pm
ONT
-
JAX
1 stop6h 36m
American Airlines
Thu 5/286:05 pm
JAX
-
ONT
1 stop7h 31m
American Airlines
Deal found 4/7$328
This Southwest deal was found by Cheapflights users on 4/6. 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 5/71:50 pm
ONT
-
JAX
1 stop5h 55m
Southwest
Sat 5/95:45 am
JAX
-
ONT
1 stop6h 50m
Southwest
Deal found 4/6$333
This United Airlines deal was found by Cheapflights users on 4/9. 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.
Thu 5/76:00 am
ONT
-
JAX
1 stop7h 13m
United Airlines
Mon 5/115:00 pm
JAX
-
ONT
1 stop8h 35m
United Airlines
Deal found 4/9$340

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 April 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$306
(United Airlines)

One-way from

$136
(Kiwi.com)

Popular in

November

Cheapest in

January

Average price

$414
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. 10% potential increase in price ($55 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 10, 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 4/30

5:00 am-9:50 pm

2 stops13h 50m

Jacksonville

Wed 5/6

5:25 pm-9:58 pm

1 stop7h 33m

$360

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Wed 5/13

5:00 am-9:50 pm

2 stops13h 50m

Jacksonville

Mon 5/18

5:25 pm-9:58 pm

1 stop7h 33m

$414

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Fri 5/8

11:35 am-10:55 pm

2 stops8h 20m

Jacksonville

Sat 5/9

8:40 am-4:45 pm

2 stops11h 05m

$415

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Tue 5/5

5:00 am-3:17 pm

1 stop7h 17m

Jacksonville

Wed 5/6

5:25 pm-9:58 pm

1 stop7h 33m

$416

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Thu 5/21

10:00 pm-8:41 am

1 stop7h 41m

Jacksonville

Wed 5/27

5:30 pm-11:34 pm

2 stops9h 04m

$419
Quickest round-trip

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Fri 5/1

6:00 am-4:13 pm

1 stop7h 13m

Jacksonville

Wed 5/6

5:25 pm-9:58 pm

1 stop7h 33m

$419

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Wed 4/29

5:10 am-10:04 pm

2 stops13h 54m

Jacksonville

Tue 6/2

7:05 am-5:28 pm

2 stops13h 23m

$431

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Sun 5/10

5:00 am-8:02 pm

2 stops12h 02m

Jacksonville

Tue 5/19

5:25 pm-9:58 pm

1 stop7h 33m

$511
Cheapest one-way

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Thu 5/7

11:59 pm-10:31 am

1 stop7h 32m

$167

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Wed 5/6

6:00 am-4:13 pm

1 stop7h 13m

$211

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/6

Showing 1-10 of 18 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 April.
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

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

Currently, September is the cheapest month in which you can book a flight from Ontario to Jacksonville (average of $120). Flying from Ontario to Jacksonville in March is currently the most expensive (average of $376). 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?

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 April 10, 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
4,334 reviews

Entertainment

7.5

Crew

8.6

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

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
4,334 reviews
Southwest
8.0
Very good
4,334 reviews

Entertainment

7.5

Crew

8.6

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

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
7.9
Good
8,398 reviews
Southwest
8.0
Very good
4,334 reviews

Entertainment

7.5

Crew

8.6

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

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
9,562 reviews
Southwest
8.0
Very good
4,334 reviews

Entertainment

7.5

Crew

8.6

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

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
11,564 reviews
Southwest
8.0
Very good
4,334 reviews

Entertainment

7.5

Crew

8.6

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

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 8h 20m. Fly via United Airlines or Southwest 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 American Airlines is currently your cheapest option to Jacksonville, with prices starting at $306. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at $326 and $330, respectively. These flights start at 31% 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 $107. 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, September is the cheapest month in which you can book a flight from Ontario to Jacksonville (average of $120). Flying from Ontario to Jacksonville in March is currently the most expensive (average of $376). 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
Orange Park
Fernandina Beach
Kingsland
Waycross
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 April 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$306Average$421FlexibilityNo cancel feeOn-time71%
DeltaCheapest$326Average$434FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$330Average$368FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$342Average$442FlexibilityNo cancel feeOn-time63%

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