HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Jacksonville

$154+ 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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — JAX
Apr 14 — Apr 211
Mon 4/14
Mon 4/21
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 November or January, booked 4 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 April 9, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$307
(Delta)

One-way from

$154
(American Airlines)

Popular in

March

Cheapest in

November

Average price

$470
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. 3% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 9, 2025.

This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/612:07 pmONT - JAX
1 stop8h 57mDelta
Sun 5/116:10 amJAX - ONT
1 stop7h 58mDelta
Deal found 4/7$307
This JetBlue 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/310:40 pmONT - JAX
1 stop10h 05mJetBlue
Fri 5/912:35 pmJAX - ONT
1 stop11h 36mJetBlue
Deal found 4/7$336
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/62:15 pmONT - JAX
1 stop6h 25mSouthwest
Sun 6/86:10 amJAX - ONT
1 stop6h 25mSouthwest
Deal found 4/8$398
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/66:00 amONT - JAX
2 stops13h 42mAlaska Airlines
Wed 5/78:34 amJAX - ONT
2 stops14h 55mAlaska Airlines
Deal found 4/7$417
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.
Tue 10/1411:59 pmONT - JAX
1 stop8h 32mAmerican Airlines
Tue 11/114:06 pmJAX - ONT
2 stops8h 35mAmerican Airlines
Deal found 4/7$422
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.
Sat 5/36:08 amONT - JAX
1 stop6h 32mUnited Airlines
Tue 5/64:54 pmJAX - ONT
1 stop8h 06mUnited Airlines
Deal found 4/8$427

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 9, 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

Tue 5/6

12:07 pm-12:04 am

1 stop8h 57m

Jacksonville

Sun 5/11

5:10 am-11:08 am

1 stop8h 58m

$307

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Wed 5/7

1:14 pm-10:10 pm

1 stop5h 56m

Jacksonville

Wed 5/14

10:38 am-6:23 pm

2 stops10h 45m

$312

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Sat 5/3

10:40 pm-11:45 am

1 stop10h 05m

Jacksonville

Fri 5/9

12:35 pm-9:11 pm

1 stop11h 36m

$336

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Fri 6/6

5:15 am-7:00 pm

2 stops10h 45m

Jacksonville

Sun 6/8

4:55 pm-12:05 am

2 stops10h 10m

$408

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Tue 5/6

6:00 am-10:42 pm

2 stops13h 42m

Jacksonville

Wed 5/7

8:34 am-8:29 pm

2 stops14h 55m

$417

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Sat 5/3

6:08 am-3:40 pm

1 stop6h 32m

Jacksonville

Tue 5/6

4:54 pm-10:00 pm

1 stop8h 06m

$427

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Wed 5/7

7:30 am-6:55 pm

1 stop8h 25m

$154

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Mon 5/12

10:59 pm-10:40 am

1 stop8h 41m

$161

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Fri 6/6

10:00 pm-10:03 am

1 stop9h 03m

$190

OntarioJacksonville

ONT - JAX

ONTJAX

Ontario

Tue 5/6

5:05 am-9:37 pm

2 stops13h 32m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/8

Showing 1-10 of 12 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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust 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 April 4, 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 April 9, 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.

Rainfall in Jacksonville by month

Plan your trip to Jacksonville by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Jacksonville ranges from 2.1 - 8.2 inches per month. September is typically the wettest month, when rainfall can reach 8.2 in. November is typically the driest time to visit Jacksonville when rainfall is around 2.1 in.

Temperature in Jacksonville by month

Plan your trip to Jacksonville by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Jacksonville, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 53.6 F).

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 9, 2025.
Read through reviews of airlines operating flights from Ontario to Jacksonville, such as Alaska Airlines, Southwest and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,847 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,847 reviews
Alaska Airlines
8.0
Very good
9,847 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,277 reviews
Alaska Airlines
8.0
Very good
9,847 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,906 reviews
Alaska Airlines
8.0
Very good
9,847 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,633 reviews
Alaska Airlines
8.0
Very good
9,847 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
JetBlue
7.3
Good
2,923 reviews
Alaska Airlines
8.0
Very good
9,847 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 Delta is currently your cheapest option to Jacksonville, with prices starting at $307. Additional round-trip tickets that might be worth considering are offered by JetBlue and American Airlines, with the lowest prices starting at $336 and $379, respectively. These flights start at 34% 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 $154. However, be on the lookout for offers from JetBlue 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, 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
Waycross
Fernandina Beach

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
Burbank to Fort Lauderdale flights
Los Angeles to Tampa flights
Ontario to Miami flights
Ontario to Orlando flights
San Diego to Orlando flights
Santa Ana to Fort Lauderdale flights
San Diego to Miami flights
Burbank to Orlando flights
San Francisco to Tampa flights
Santa Ana to Orlando flights
Oakland to Fort Lauderdale flights
Las Vegas to Orlando flights
San Francisco to Fort Lauderdale flights
San Diego to Fort Lauderdale flights
Las Vegas to Fort Lauderdale flights
Los Angeles to West Palm Beach flights
Santa Ana to Miami flights
Sacramento to Orlando flights
Las Vegas to Miami flights
Burbank to Miami flights
Ontario to Fort Lauderdale flights
San Jose to Orlando flights
Las Vegas to Tampa flights
Oakland to Miami flights
San Diego to Tampa flights
Sacramento to Miami flights
Ontario to Tampa flights
Santa Ana to Tampa flights
San Jose to Miami flights
Oakland to Orlando flights
Los Angeles to Jacksonville flights
Fresno to Orlando flights
Los Angeles to Pensacola flights
Burbank to Tampa flights
Los Angeles to Fort Myers flights
San Diego to Pensacola flights
San Francisco to Jacksonville flights
San Francisco to West Palm Beach flights
Ontario to West Palm Beach flights
Ontario to Pensacola flights
San Francisco to Panama City flights
San Jose to Fort Lauderdale flights
Long Beach to Orlando flights
San Francisco to Pensacola flights
Oakland to Tampa 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 April 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$296Average$472FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$342Average$426FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$342Average$456FlexibilityNo cancel feeOn-time71%
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.
Site
©2025 Cheapflights