HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Jacksonville

$172+ 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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — JAX
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
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.

Cheapflights Tip: The best prices from Ontario to Jacksonville are usually found in August or October, 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 July 1, 2025.

Round-trip from

$301
(JetBlue)

One-way from

$172
(American Airlines)

Popular in

March

Cheapest in

August

Average price

$446
From Ontario to Jacksonville
Search Deals
One-way flight from Ontario to Jacksonville
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 July 1, 2025.

This JetBlue deal was found by Cheapflights users on 7/1. 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.
Thu 7/2411:59 pmONT - JAX
1 stop10h 30mJetBlue
Sun 7/272:24 pmJAX - ONT
1 stop10h 35mJetBlue
Deal found 7/1$301
This CheapOair deal was found by Cheapflights users on 6/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/512:59 amONT - JAX
2 stops38h 55mFrontier
Fri 8/87:05 pmJAX - ONT
1 stop27h 09mFrontier
Deal found 6/30$317
This Delta deal was found by Cheapflights users on 6/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1410:59 pmONT - JAX
1 stop6h 48mDelta
Tue 11/115:05 pmJAX - ONT
1 stop8h 36mDelta
Deal found 6/30$343
This American Airlines deal was found by Cheapflights users on 6/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1411:59 pmONT - JAX
2 stops8h 45mAmerican Airlines
Tue 11/115:28 amJAX - ONT
1 stop7h 00mAmerican Airlines
Deal found 6/30$348
This United Airlines deal was found by Cheapflights users on 6/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/151:34 pmONT - JAX
1 stop6h 32mUnited Airlines
Mon 8/183:41 pmJAX - ONT
1 stop8h 56mUnited Airlines
Deal found 6/30$366
This Southwest deal was found by Cheapflights users on 6/29. 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.
Fri 8/159:15 amONT - JAX
2 stops9h 20mSouthwest
Mon 8/185:35 amJAX - ONT
2 stops10h 05mSouthwest
Deal found 6/29$376

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 1, 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 7/24

11:59 pm-1:29 pm

1 stop10h 30m

Jacksonville

Sun 7/27

2:24 pm-9:59 pm

1 stop10h 35m

$301

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Tue 8/5

12:59 am-6:54 pm

2 stops38h 55m

Jacksonville

Fri 8/8

7:05 pm-7:14 pm

1 stop27h 09m

$317

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Tue 10/14

10:59 pm-8:47 am

1 stop6h 48m

Jacksonville

Tue 11/11

5:05 pm-10:41 pm

1 stop8h 36m

$343

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Tue 10/14

11:59 pm-11:44 am

2 stops8h 45m

Jacksonville

Tue 11/11

5:28 am-9:28 am

1 stop7h 00m

$348

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Fri 8/15

1:34 pm-11:06 pm

1 stop6h 32m

Jacksonville

Mon 8/18

3:41 pm-9:37 pm

1 stop8h 56m

$366

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Fri 8/15

9:15 am-9:35 pm

2 stops9h 20m

Jacksonville

Mon 8/18

5:35 am-12:40 pm

2 stops10h 05m

$376

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Wed 9/24

11:55 am-10:37 pm

1 stop7h 42m

$172

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Tue 7/29

6:15 am-7:27 pm

2 stops10h 12m

$179

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Sun 7/27

12:59 am-6:03 pm

2 stops14h 04m

$193

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Wed 8/13

6:00 am-5:50 pm

1 stop8h 50m

$222

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 13 results
1
2

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 27, 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 July 1, 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.

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 1, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

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

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

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
4,273 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

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
7,973 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

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
8,858 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

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
2,919 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

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 JetBlue is currently your cheapest option to Jacksonville, with prices starting at $301. Additional round-trip tickets that might be worth considering are offered by Frontier and Delta, with the lowest prices starting at $317 and $343, 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 American Airlines, with whom users have recently found tickets for as low as $172. However, be on the lookout for offers from Delta and Frontier, 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
Fernandina Beach
Waycross

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 Orlando flights
Los Angeles to Miami flights
Los Angeles to Fort Lauderdale flights
San Francisco to Miami flights
San Francisco to Orlando flights
Ontario to Miami flights
Ontario to Orlando flights
Burbank to Fort Lauderdale flights
Los Angeles to Tampa flights
San Diego to Orlando flights
Santa Ana to Fort Lauderdale flights
Las Vegas to Miami flights
San Diego to Miami flights
San Francisco to Fort Lauderdale flights
Santa Ana to Orlando flights
Las Vegas to Fort Lauderdale flights
Burbank to Orlando flights
Las Vegas to Orlando flights
Santa Ana to Miami flights
San Francisco to Tampa flights
Ontario to Fort Lauderdale flights
Burbank to Miami flights
Sacramento to Orlando flights
San Diego to Fort Lauderdale flights
Los Angeles to West Palm Beach flights
Ontario to Tampa flights
Oakland to Miami flights
Oakland to Fort Lauderdale flights
San Diego to Tampa flights
San Jose to Orlando flights
San Jose to Miami flights
Sacramento to Miami flights
Oakland to Orlando flights
Las Vegas to Tampa flights
Sacramento to Fort Lauderdale flights
San Francisco to West Palm Beach flights
Burbank to Tampa flights
Los Angeles to Valparaiso flights
Sacramento to Tampa flights
Sacramento to West Palm Beach flights
Los Angeles to Fort Myers flights
San Jose to Fort Lauderdale flights
Los Angeles to Jacksonville flights
Los Angeles to Pensacola flights
Los Angeles to Orlando Sanford Intl flights
Ontario to West Palm Beach flights
San Francisco to Jacksonville flights
Los Angeles to Sarasota flights
Long Beach to Orlando 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 July 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$296Average$447FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$306Average$430FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$342Average$426FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$366Average$566FlexibilityNo 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.