HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Jacksonville

$143+ 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 1/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — JAX
janv. 27 — févr. 31
mar. 1/27
mar. 2/3
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Jacksonville with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 décembre 28, 2025.

This American Airlines deal was found by Cheapflights users on 12/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/3010:40 pmONT - JAX
1 stop13h 13mAmerican Airlines
jeu. 1/112:50 pmJAX - ONT
1 stop11h 08mAmerican Airlines
Deal found 12/26$763
This Kiwi.com deal was found by Cheapflights users on 12/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/306:17 pmONT - JAX
1 stop22h 40mMultiple Airlines
jeu. 1/18:35 pmJAX - ONT
2 stops46h 56mMultiple Airlines
Deal found 12/26$772
This Kiwi.com deal was found by Cheapflights users on 12/25. 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.
lun. 12/298:14 amONT - JAX
1 stop7h 14mMultiple Airlines
dim. 1/48:55 amJAX - ONT
2 stops35h 20mMultiple Airlines
Deal found 12/25$876
This Southwest deal was found by Cheapflights users on 12/25. 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.
lun. 12/299:30 amONT - JAX
1 stop7h 30mSouthwest
dim. 1/42:40 pmJAX - ONT
1 stop9h 00mSouthwest
Deal found 12/25$972
This United Airlines deal was found by Cheapflights users on 12/26. 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.
dim. 12/281:40 pmONT - JAX
1 stop6h 36mUnited Airlines
dim. 1/44:20 pmJAX - ONT
1 stop7h 47mUnited Airlines
Deal found 12/26$977
This American Airlines deal was found by Cheapflights users on 12/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 12/286:10 amONT - JAX
1 stop6h 52mAmerican Airlines
dim. 1/47:49 pmJAX - ONT
1 stop6h 57mAmerican Airlines
Deal found 12/26$979
This United Airlines deal was found by Cheapflights users on 12/26. 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.
sam. 12/275:05 amONT - JAX
1 stop7h 14mUnited Airlines
sam. 1/311:45 amJAX - ONT
2 stops12h 22mUnited Airlines
Deal found 12/26$982
This United Airlines deal was found by Cheapflights users on 12/25. 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.
lun. 12/295:05 amONT - JAX
2 stops9h 36mUnited Airlines
mer. 12/314:39 pmJAX - ONT
1 stop8h 46mUnited Airlines
Deal found 12/25$1,062
This United Airlines deal was found by Cheapflights users on 12/26. 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.
ven. 12/2611:59 pmONT - JAX
1 stop7h 58mUnited Airlines
dim. 1/411:45 amJAX - ONT
2 stops12h 22mUnited Airlines
Deal found 12/26$1,162
This United Airlines deal was found by Cheapflights users on 12/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/301:40 pmONT - JAX
1 stop6h 36mUnited Airlines
sam. 1/104:17 pmJAX - ONT
1 stop7h 41mUnited Airlines
Deal found 12/27$1,517

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 décembre 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$270
(Kiwi.com)

One-way from

$143
(Kiwi.com)

Popular in

November

Cheapest in

January

Average price

$473
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. 6% potential increase in price ($29 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 December 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 décembre 28, 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

sam. 1/17

12:41 pm-11:58 pm

1 stop8h 17m

Jacksonville

mar. 1/20

6:30 am-11:31 am

1 stop8h 01m

$301

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

dim. 1/18

12:41 pm-11:58 pm

1 stop8h 17m

Jacksonville

mer. 2/11

7:30 am-11:31 am

1 stop7h 01m

$330

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

sam. 1/17

12:41 pm-11:58 pm

1 stop8h 17m

Jacksonville

mer. 1/21

7:30 am-11:31 am

1 stop7h 01m

$330

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

mar. 1/20

12:41 pm-9:57 pm

1 stop6h 16m

Jacksonville

jeu. 1/22

7:30 am-11:31 am

1 stop7h 01m

$343

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

mer. 1/28

10:30 pm-10:17 am

1 stop8h 47m

Jacksonville

mer. 2/11

7:30 am-11:31 am

1 stop7h 01m

$359

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

mer. 1/28

10:30 pm-10:17 am

1 stop8h 47m

Jacksonville

sam. 1/31

5:30 am-1:56 pm

2 stops11h 26m

$368

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

lun. 3/2

1:15 pm-10:58 pm

1 stop6h 43m

Jacksonville

mer. 3/11

6:30 am-11:40 am

1 stop8h 10m

$372

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

mar. 2/24

6:05 am-6:10 pm

2 stops9h 05m

Jacksonville

sam. 2/28

11:30 am-8:05 pm

2 stops11h 35m

$373

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

mer. 1/14

7:15 am-8:52 pm

3 stops34h 37m

$149

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

jeu. 2/19

10:20 pm-8:44 am

1 stop7h 24m

$193

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

Showing 1-10 of 19 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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Jacksonville flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 December 26, 2025.

Booking 62 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 décembre 28, 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
4,256 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,256 reviews
Southwest
8.0
Very good
4,256 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Delta
7.9
Good
8,019 reviews
Southwest
8.0
Very good
4,256 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
United Airlines
7.4
Good
9,113 reviews
Southwest
8.0
Very good
4,256 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.2
Good
11,073 reviews
Southwest
8.0
Very good
4,256 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

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 17m. 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 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 Southwest, with the lowest prices starting at $306 and $342, respectively. These flights start at 32% 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 American Airlines, with whom users have recently found tickets for as low as $150. However, be on the lookout for offers from Southwest and Delta, 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, 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
Yulee

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Jacksonville

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Miami flights
Los Angeles to Orlando flights
Los Angeles to Fort Lauderdale flights
San Francisco to Miami flights
San Francisco to Orlando flights
San Francisco to Fort Lauderdale flights
Los Angeles to Tampa flights
Ontario to Orlando flights
San Diego to Orlando flights
Ontario to Miami flights
Burbank to Fort Lauderdale flights
Las Vegas to Orlando flights
Las Vegas to Miami flights
Las Vegas to Fort Lauderdale flights
San Diego to Miami flights
San Francisco to Tampa flights
Santa Ana to Orlando flights
Los Angeles to West Palm Beach flights
Sacramento to Orlando flights
San Diego to Fort Lauderdale flights
Ontario to Fort Lauderdale flights
San Diego to Tampa flights
Santa Ana to Fort Lauderdale flights
Ontario to Tampa flights
San Jose to Miami flights
Santa Ana to Miami flights
San Jose to Orlando flights
Las Vegas to Tampa flights
Santa Ana to Tampa flights
Fresno to Orlando flights
San Francisco to West Palm Beach flights
Sacramento to Miami flights
San Jose to Fort Lauderdale flights
Sacramento to Fort Lauderdale flights
Burbank to Orlando flights
Oakland to Orlando flights
Los Angeles to Jacksonville flights
Oakland to Miami flights
San Francisco to Fort Myers flights
San Francisco to Jacksonville flights
Los Angeles to Fort Myers flights
Burbank to Miami flights
Oakland to Fort Lauderdale flights
Reno to Orlando flights
Fresno to Miami flights
San Jose to West Palm Beach flights
Ontario to West Palm Beach flights
Medford to Orlando flights
San Diego to Sarasota flights

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 décembre 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$306Average$436FlexibilityNo cancel feeOn-time71%
DeltaCheapest$326Average$454FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$342Average$426FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$360Average$496FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.