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$141+ 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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — JAX
Nov 16 — Nov 231
Sun 11/16
Sun 11/23
1 adult, Economy
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Find cheap flights from Ontario to Jacksonville with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Ontario to Jacksonville are usually found in July or May, booked 4 days in advance, depart on a Thursday or Monday and return on a Tuesday

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 October 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/17. 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.
Sat 11/18:39 amONT - JAX
1 stop23h 33mMultiple Airlines
Wed 11/59:38 amJAX - ONT
1 stop14h 04mMultiple Airlines
Deal found 10/17$243
This Kiwi.com deal was found by Cheapflights users on 10/15. 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.
Wed 11/128:45 amONT - JAX
2 stops28h 28mMultiple Airlines
Wed 11/199:38 amJAX - ONT
1 stop14h 04mMultiple Airlines
Deal found 10/15$281
This Kiwi.com deal was found by Cheapflights users on 10/15. 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.
Wed 12/176:15 amONT - JAX
1 stop10h 42mMultiple Airlines
Wed 1/79:39 amJAX - ONT
1 stop13h 34mMultiple Airlines
Deal found 10/15$297
This United Airlines deal was found by Cheapflights users on 10/16. 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 12/161:34 pmONT - JAX
1 stop6h 40mUnited Airlines
Wed 12/244:55 pmJAX - ONT
1 stop7h 57mUnited Airlines
Deal found 10/16$298
This Frontier deal was found by Cheapflights users on 10/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:54 amONT - JAX
1 stop8h 07mFrontier
Wed 11/269:34 pmJAX - ONT
1 stop13h 16mFrontier
Deal found 10/16$300
This Frontier deal was found by Cheapflights users on 10/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:54 amONT - JAX
1 stop8h 07mFrontier
Mon 11/249:34 pmJAX - ONT
1 stop12h 46mFrontier
Deal found 10/16$313
This United Airlines deal was found by Cheapflights users on 10/16. 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.
Mon 12/151:34 pmONT - JAX
1 stop6h 40mUnited Airlines
Wed 12/244:55 pmJAX - ONT
1 stop7h 57mUnited Airlines
Deal found 10/16$315
This Kiwi.com deal was found by Cheapflights users on 10/15. 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.
Wed 12/176:15 amONT - JAX
1 stop10h 42mMultiple Airlines
Thu 1/812:05 pmJAX - ONT
2 stops29h 26mMultiple Airlines
Deal found 10/15$330
This Delta deal was found by Cheapflights users on 10/16. 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 12/1612:12 pmONT - JAX
1 stop6h 57mDelta
Wed 1/77:30 amJAX - ONT
1 stop7h 08mDelta
Deal found 10/16$334

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 October 17, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$281
(Kiwi.com)

One-way from

$141
(Priceline)

Popular in

August

Cheapest in

July

Average price

$416
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
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 17, 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

Mon 12/15

12:12 pm-10:04 pm

1 stop6h 52m

Jacksonville

Thu 12/25

6:00 am-10:05 am

1 stop7h 05m

$315

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Wed 12/17

6:00 am-10:09 pm

2 stops13h 09m

Jacksonville

Tue 1/6

5:30 am-11:38 am

1 stop9h 08m

$339

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Mon 12/15

10:25 pm-10:41 am

1 stop9h 16m

Jacksonville

Thu 1/8

3:45 pm-9:14 pm

1 stop8h 29m

$351

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Tue 3/3

5:05 pm-8:49 am

2 stops12h 44m

Jacksonville

Wed 3/4

3:45 pm-9:14 pm

1 stop8h 29m

$356

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Wed 11/5

7:05 am-7:06 pm

1 stop9h 01m

Jacksonville

Sat 11/8

11:27 am-9:20 pm

2 stops12h 53m

$364

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Fri 11/14

12:16 pm-12:10 am

1 stop8h 54m

Jacksonville

Sat 11/15

7:00 am-4:09 pm

2 stops12h 09m

$393

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Mon 12/15

4:49 pm-8:40 am

2 stops12h 51m

Jacksonville

Mon 1/5

5:30 am-11:38 am

1 stop9h 08m

$399

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Tue 12/16

10:25 pm-8:40 am

1 stop7h 15m

Jacksonville

Thu 1/1

1:44 pm-7:50 pm

1 stop9h 06m

$428

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Thu 10/30

6:53 am-6:09 pm

2 stops32h 16m

$149

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Tue 12/16

10:25 pm-8:40 am

1 stop7h 15m

$159

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/15

Showing 1-10 of 18 results
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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice 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?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Jacksonville. Price data was last updated on October 10, 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, April is the cheapest month in which you can book a flight from Ontario to Jacksonville (average of $82). Flying from Ontario to Jacksonville in July 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.

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 October 17, 2025.
See what other customers who have flown with Southwest, Delta, and United 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
4,244 reviews

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
7.9
Good
7,976 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,987 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
11,036 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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 6h 52m. Fly via Delta to get the fastest option. Airlines will cover a distance of 2100 mi.

  • 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 $306. Additional round-trip tickets that might be worth considering are offered by American Airlines and Southwest, with the lowest prices starting at $326 and $342, respectively. These flights start at 33% lower than the current average price 3 months from now.

  • 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, April is the cheapest month in which you can book a flight from Ontario to Jacksonville (average of $82). Flying from Ontario to Jacksonville in July 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

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

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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 October 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$306Average$454FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$326Average$439FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$342Average$416FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$360Average$514FlexibilityNo cancel feeOn-time69%

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