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Ontario

$124+ 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 4/30. Fares are subject to change and may not be available on all flights or dates of travel.
JAX — ONT
Mar 30 — Apr 61
Mon 3/30
Mon 4/6
1 adult, Economy
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Cheap 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 February 28, 2026.

This American Airlines deal was found by Cheapflights users on 2/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/251:44 pm
JAX
-
ONT
1 stop10h 40m
American Airlines
Tue 3/3110:36 pm
ONT
-
JAX
1 stop7h 15m
American Airlines
Deal found 2/25$311
This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/253:59 pm
JAX
-
ONT
2 stops10h 52m
Delta
Tue 3/315:09 pm
ONT
-
JAX
2 stops12h 37m
Delta
Deal found 2/25$321
This American Airlines deal was found by Cheapflights users on 2/24. 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 3/183:55 pm
JAX
-
ONT
1 stop8h 29m
American Airlines
Mon 3/2311:59 pm
ONT
-
JAX
1 stop9h 04m
American Airlines
Deal found 2/24$332
This Delta deal was found by Cheapflights users on 2/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2011:45 am
JAX
-
ONT
2 stops14h 59m
Delta
Wed 4/2210:15 pm
ONT
-
JAX
1 stop7h 32m
Delta
Deal found 2/27$340
This American Airlines deal was found by Cheapflights users on 2/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/183:52 pm
JAX
-
ONT
2 stops10h 54m
American Airlines
Tue 4/2111:59 pm
ONT
-
JAX
2 stops9h 40m
American Airlines
Deal found 2/27$345
This American Airlines deal was found by Cheapflights users on 2/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/237:45 pm
JAX
-
ONT
1 stop7h 14m
American Airlines
Mon 3/3011:59 pm
ONT
-
JAX
1 stop9h 04m
American Airlines
Deal found 2/25$353

Find 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 February 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$311
(American Airlines)

One-way from

$124
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$442
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. 10% potential increase in price ($51 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 February 2026
Search Deals

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 February 28, 2026.
Use the filters below to find and compare flights from Jacksonville to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Mon 4/20

11:45 am-11:44 pm

2 stops14h 59m

Ontario

Wed 4/22

10:15 pm-8:47 am

1 stop7h 32m

$340

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Sat 3/21

3:59 pm-9:00 pm

1 stop8h 01m

Ontario

Sat 5/23

12:08 pm-12:17 am

1 stop9h 09m

$386

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Tue 4/14

8:15 am-12:38 pm

1 stop7h 23m

Ontario

Tue 4/21

5:10 am-10:04 pm

2 stops13h 54m

$426

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Tue 3/24

3:40 pm-11:10 pm

2 stops10h 30m

Ontario

Sat 5/23

6:00 am-9:15 pm

2 stops12h 15m

$430

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Thu 7/30

5:35 am-8:55 am

1 stop6h 20m

Ontario

Thu 8/6

11:00 am-9:45 pm

1 stop7h 45m

$437

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Wed 5/13

5:25 pm-9:58 pm

1 stop7h 33m

Ontario

Sat 5/16

5:00 am-8:02 pm

2 stops12h 02m

$441

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Fri 3/27

5:10 am-12:30 pm

2 stops10h 20m

Ontario

Wed 5/27

9:45 pm-10:05 am

2 stops9h 20m

$447

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Mon 4/27

5:27 pm-9:50 pm

1 stop7h 23m

Ontario

Tue 4/28

5:10 am-10:04 pm

2 stops13h 54m

$462

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Tue 5/26

5:30 pm-11:34 pm

2 stops9h 04m

Ontario

Sun 5/31

10:00 pm-9:41 am

1 stop8h 41m

$463

JacksonvilleOntario

JAX - ONT

JAXONT

Jacksonville

Tue 3/24

8:04 am-5:41 pm

2 stops12h 37m

Ontario

Tue 3/31

7:00 am-7:34 pm

1 stop9h 34m

$477

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/23

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
JustAirTicketPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Jacksonville-Ontario flight deals on Cheapflights vs. FlightHub >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 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 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, October is the cheapest month in which you can book a flight from Jacksonville to Ontario (average of $124). Flying from Jacksonville to Ontario in January is currently the most expensive (average of $292). 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 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 February 28, 2026.
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
4,303 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

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
4,303 reviews
Southwest
8.0
Very good
4,303 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

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
8,245 reviews
Southwest
8.0
Very good
4,303 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

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
9,363 reviews
Southwest
8.0
Very good
4,303 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

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
11,367 reviews
Southwest
8.0
Very good
4,303 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

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 6h 20m. Fly via United Airlines, Delta, or Southwest to get the fastest option. The distance from Jacksonville to Ontario is about 2100 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    According to our current data, Delta ($204), United Airlines ($228), and Southwest ($331) offers the cheapest pricing from Jacksonville to Ontario. Delta is priced at 55% 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 Delta, with whom users have recently found tickets for as low as $138. However, be on the lookout for offers from American Airlines 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, October is the cheapest month in which you can book a flight from Jacksonville to Ontario (average of $124). Flying from Jacksonville to Ontario in January is currently the most expensive (average of $292). 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.

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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 February 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$204Average$498FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$228Average$411FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$331Average$397FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$342Average$439FlexibilityNo cancel feeOn-time71%

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