HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$65+ Cheap flights from Jacksonville to Ontario (JAX - ONT)

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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
JAX — ONT
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Jacksonville to Ontario 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 Jacksonville to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Jacksonville (JAX) to Ontario (ONT). 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 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$230
(Kiwi.com)

One-way from

$65
(Frontier)

Popular in

August

Cheapest in

September

Average price

$437
Provider with most accurate pricing for Jacksonville-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Jacksonville-Ontario flights.
Search Deals
From Jacksonville to Ontario
Search Deals
One-way flight from Jacksonville to Ontario
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($24 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from Jacksonville to Ontario

Cheapest flights from Jacksonville to Ontario
Explore the most affordable flight options available from Jacksonville to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/41:57 pmJAX - ONT
1 stop7h 38mFrontier
Sun 12/72:59 pmONT - JAX
2 stops23h 37mFrontier
Deal found 10/29$230
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/111:57 pmJAX - ONT
1 stop7h 38mMultiple Airlines
Wed 12/176:15 amONT - JAX
1 stop10h 42mMultiple Airlines
Deal found 10/27$281
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Thu 12/111:57 pmJAX - ONT
1 stop7h 38mMultiple Airlines
Tue 12/1612:30 pmONT - JAX
2 stops28h 27mMultiple Airlines
Deal found 10/28$314
This Delta deal was found by Cheapflights users on 10/28. 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 12/165:35 pmJAX - ONT
1 stop8h 29mDelta
Mon 1/51:04 pmONT - JAX
1 stop6h 53mDelta
Deal found 10/28$351
This American Airlines deal was found by Cheapflights users on 10/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:18 amJAX - ONT
2 stops12h 44mAmerican Airlines
Wed 12/1712:55 pmONT - JAX
1 stop7h 00mAmerican Airlines
Deal found 10/29$356
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/19:34 pmJAX - ONT
1 stop16h 53mMultiple Airlines
Mon 12/85:18 pmONT - JAX
2 stops36h 35mMultiple Airlines
Deal found 10/29$376
This Frontier deal was found by Cheapflights users on 10/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1211:31 amJAX - ONT
1 stop9h 03mFrontier
Mon 12/228:14 amONT - JAX
1 stop7h 14mFrontier
Deal found 10/29$377
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:56 pmJAX - ONT
2 stops28h 31mFrontier
Sun 11/239:54 amONT - JAX
1 stop7h 54mFrontier
Deal found 10/30$384
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:40 pmJAX - ONT
1 stop7h 24mDelta
Wed 12/1710:25 pmONT - JAX
1 stop9h 16mDelta
Deal found 10/29$385

Cheapflights Fare Finder

 
Customize your flight search to find flights from Jacksonville to Ontario 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 30, 2025.
Use the filters below to find and compare flights from Jacksonville to Ontario that are best for you.

Fly from

Jacksonville

Fly to

Ontario

Route

Depart

Return

Price

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Thu 12/11

1:57 pm-6:35 pm

1 stop7h 38m

Ontario

Wed 12/17

6:15 am-7:57 pm

1 stop10h 42m

$281

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Thu 12/11

1:57 pm-6:35 pm

1 stop7h 38m

Ontario

Tue 12/16

12:30 pm-7:57 pm

2 stops28h 27m

$314

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Wed 12/17

5:05 am-10:31 am

1 stop8h 26m

Ontario

Mon 1/5

1:04 pm-10:57 pm

1 stop6h 53m

$351

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Thu 12/11

4:30 pm-8:42 pm

1 stop7h 12m

Ontario

Tue 12/16

1:34 pm-11:14 pm

1 stop6h 40m

$351

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Tue 12/16

5:35 pm-11:04 pm

1 stop8h 29m

Ontario

Mon 1/5

1:04 pm-10:57 pm

1 stop6h 53m

$351

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Thu 12/11

6:40 pm-11:04 pm

1 stop7h 24m

Ontario

Tue 12/16

10:25 pm-10:41 am

1 stop9h 16m

$351

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Wed 12/17

5:05 am-10:31 am

1 stop8h 26m

Ontario

Wed 1/7

1:04 pm-11:59 pm

1 stop7h 55m

$351

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Wed 12/17

5:05 am-10:31 am

1 stop8h 26m

Ontario

Thu 1/8

1:04 pm-11:59 pm

1 stop7h 55m

$351

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Thu 12/11

11:46 am-11:04 pm

2 stops14h 18m

Ontario

Wed 12/17

4:49 pm-8:40 am

2 stops12h 51m

$361

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Thu 11/20

6:00 am-7:42 pm

2 stops16h 42m

Ontario

Thu 11/27

6:00 am-8:39 pm

2 stops11h 39m

$401

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 22 results
1
2
3

Compare providers for flights from Jacksonville to Ontario

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 Jacksonville to Ontario in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*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 Jacksonville-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Jacksonville-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Jacksonville-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Jacksonville-Ontario 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 Jacksonville-Ontario 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 Jacksonville to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Jacksonville 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 Jacksonville to Ontario

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

Currently, November is the cheapest month in which you can book a flight from Jacksonville to Ontario (average of $119). Flying from Jacksonville to Ontario in March is currently the most expensive (average of $281). 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 JAX to ONT?

Find hourly flight availability from Jacksonville to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

A simple way to save on the total cost of your ticket is to fly from Jacksonville to Ontario at noon. If you’re flexible enough to do this you can expect to save up to 26% on your trip compared to booking a flight in the evening.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated October 30, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Jacksonville to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Food

7.0

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
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Food

7.0

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
7,998 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Food

7.0

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
8,998 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Food

7.0

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
11,035 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Food

7.0

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 Jacksonville to Ontario. 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 Jacksonville to Ontario?

    There are many flights that can get you from Jacksonville to Ontario in 8h 26m. Fly via Delta to get the fastest option. The distance from Jacksonville to Ontario is about 2100 mi.

  • What are the cheapest airlines flying from Jacksonville to Ontario round-trip?

    According to our current data, Delta ($204), United Airlines ($228), and American Airlines ($342) offers the cheapest pricing from Jacksonville to Ontario. Delta is priced at 56% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Jacksonville to Ontario one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $173. However, be on the lookout for offers from Delta and United Airlines, as they are both options that can get you from Jacksonville to Ontario for a low price.

  • Can I find deals for flights from Jacksonville to Ontario that include hotel bookings?

    Yes. In addition to deals on Jacksonville to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Jacksonville to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Jacksonville to Ontario.

  • Can I find deals for business class flights from Jacksonville to Ontario?

    Yes. Cheapflights offers flight deals from Jacksonville to Ontario 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 Jacksonville to Ontario?

    Currently, November is the cheapest month in which you can book a flight from Jacksonville to Ontario (average of $119). Flying from Jacksonville to Ontario in March is currently the most expensive (average of $281). 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

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 Jacksonville to Ontario

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

Top 4 airlines flying from Jacksonville to Ontario

Discover the top 4 airlines that operate flights from Jacksonville to Ontario. 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 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$204Average$581FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$228Average$361FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$342Average$464FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$351Average$419FlexibilityNo cancel feeOn-time63%

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.