$148+ 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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — JAX
Aug 15 — Aug 221
Round-trip
1 adult, Economy
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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
Best
Last-minute
One-way
Cheapest flights from Ontario to JacksonvilleExplore 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 16, 2026.
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 16, 2026.
This Delta deal was found by Cheapflights users on 7/14. 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 8/1112:00 pm
ONT
- JAX
1 stop6h 43m
Delta
Tue 8/256:00 am
JAX
- ONT
1 stop7h 42m
Delta
Deal found 7/14![Delta logo]()
$323
This Southwest deal was found by Cheapflights users on 7/14. 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.
Mon 8/175:15 am
ONT
- JAX
2 stops10h 20m
Southwest
Thu 8/205:50 am
JAX
- ONT
1 stop6h 25m
Southwest
Deal found 7/14![Southwest logo]()
$328
This Southwest deal was found by Cheapflights users on 7/13. 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.
Wed 11/118:45 am
ONT
- JAX
2 stops10h 25m
Southwest
Wed 11/186:35 am
JAX
- ONT
2 stops11h 05m
Southwest
Deal found 7/13![Southwest logo]()
$333
This Southwest deal was found by Cheapflights users on 7/14. 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.
Wed 8/125:45 am
ONT
- JAX
2 stops9h 10m
Southwest
Mon 8/245:50 am
JAX
- ONT
1 stop6h 25m
Southwest
Deal found 7/14![Southwest logo]()
$346
This Southwest deal was found by Cheapflights users on 7/11. 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.
Wed 10/146:10 am
ONT
- JAX
2 stops9h 20m
Southwest
Sat 10/171:20 pm
JAX
- ONT
2 stops10h 20m
Southwest
Deal found 7/11![Southwest logo]()
$372
This Kiwi.com deal was found by Cheapflights users on 7/11. 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.
Tue 10/132:58 pm
ONT
- JAX
1 stop26h 04m
Multiple Airlines
Mon 10/196:46 pm
JAX
- ONT
2 stops32h 09m
Multiple Airlines
Deal found 7/11![Multiple Airlines logo]()
$375
This Kiwi.com deal was found by Cheapflights users on 7/14. 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.
Tue 8/114:09 pm
ONT
- JAX
1 stop24h 36m
Multiple Airlines
Mon 8/247:05 pm
JAX
- ONT
2 stops31h 45m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$378
This Kiwi.com deal was found by Cheapflights users on 7/14. 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.
Tue 8/114:09 pm
ONT
- JAX
1 stop24h 36m
Multiple Airlines
Tue 8/257:05 pm
JAX
- ONT
2 stops31h 45m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$379
This Kiwi.com deal was found by Cheapflights users on 7/11. 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.
Tue 10/132:58 pm
ONT
- JAX
1 stop26h 04m
Multiple Airlines
Sun 10/186:46 pm
JAX
- ONT
2 stops23h 01m
Multiple Airlines
Deal found 7/11![Multiple Airlines logo]()
$384
This United Airlines deal was found by Cheapflights users on 7/14. 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.
Thu 8/135:00 am
ONT
- JAX
1 stop7h 33m
United Airlines
Tue 8/188:15 am
JAX
- ONT
1 stop7h 35m
United Airlines
Deal found 7/14![United Airlines logo]()
$387
Best flights from Ontario to JacksonvilleDiscover carefully curated flight deals from Ontario to Jacksonville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 16, 2026.
Discover carefully curated flight deals from Ontario to Jacksonville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 16, 2026.
This Southwest deal was found by Cheapflights users on 7/14. 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.
Mon 8/175:15 am
ONT
- JAX
2 stops10h 20m
Southwest
Thu 8/205:50 am
JAX
- ONT
1 stop6h 25m
Southwest
Deal found 7/14![Southwest logo]()
$328
This United Airlines deal was found by Cheapflights users on 7/12. 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.
Thu 11/56:46 am
ONT
- JAX
1 stop8h 11m
United Airlines
Wed 11/113:39 pm
JAX
- ONT
1 stop9h 11m
United Airlines
Deal found 7/12![United Airlines logo]()
$506
This Delta deal was found by Cheapflights users on 7/13. 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 8/310:00 pm
ONT
- JAX
1 stop7h 47m
Delta
Thu 8/62:29 pm
JAX
- ONT
1 stop7h 01m
Delta
Deal found 7/13![Delta logo]()
$537
This Southwest deal was found by Cheapflights users on 7/14. 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.
Wed 8/127:25 am
ONT
- JAX
1 stop9h 15m
Southwest
Mon 8/245:50 am
JAX
- ONT
1 stop6h 25m
Southwest
Deal found 7/14![Southwest logo]()
$396
This United Airlines deal was found by Cheapflights users on 7/10. 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.
Tue 9/226:00 am
ONT
- JAX
1 stop14h 39m
United Airlines
Sat 9/265:25 pm
JAX
- ONT
1 stop7h 34m
United Airlines
Deal found 7/10![United Airlines logo]()
$536
This Delta deal was found by Cheapflights users on 7/14. 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.
Thu 7/3010:00 pm
ONT
- JAX
1 stop7h 36m
Delta
Thu 8/62:29 pm
JAX
- ONT
1 stop7h 01m
Delta
Deal found 7/14![Delta logo]()
$567
This Southwest deal was found by Cheapflights users on 7/12. 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.
Mon 8/39:40 pm
ONT
- JAX
1 stop9h 40m
Southwest
Fri 8/74:50 pm
JAX
- ONT
1 stop8h 20m
Southwest
Deal found 7/12![Southwest logo]()
$537
This United Airlines deal was found by Cheapflights users on 7/14. 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.
Tue 10/275:00 am
ONT
- JAX
1 stop7h 29m
United Airlines
Wed 10/289:25 am
JAX
- ONT
2 stops13h 41m
United Airlines
Deal found 7/14![United Airlines logo]()
$545
Last-minute flights from Ontario to JacksonvilleDiscover last-minute flight deals from Ontario to Jacksonville. Data last updated July 16, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Jacksonville. Data last updated July 16, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 7/14. 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 8/1112:00 pm
ONT
- JAX
1 stop6h 43m
Delta
Tue 8/256:00 am
JAX
- ONT
1 stop7h 42m
Delta
Deal found 7/14![Delta logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 7/14. 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.
Tue 8/114:09 pm
ONT
- JAX
1 stop24h 36m
Multiple Airlines
Mon 8/247:05 pm
JAX
- ONT
2 stops31h 45m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$378
This Kiwi.com deal was found by Cheapflights users on 7/14. 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.
Tue 8/114:09 pm
ONT
- JAX
1 stop24h 36m
Multiple Airlines
Tue 8/257:05 pm
JAX
- ONT
2 stops31h 45m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$379
This Southwest deal was found by Cheapflights users on 7/14. 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.
Wed 8/125:45 am
ONT
- JAX
2 stops9h 10m
Southwest
Mon 8/245:50 am
JAX
- ONT
1 stop6h 25m
Southwest
Deal found 7/14![Southwest logo]()
$346
This American Airlines deal was found by Cheapflights users on 7/14. 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 8/126:00 am
ONT
- JAX
1 stop7h 26m
American Airlines
Tue 8/257:00 am
JAX
- ONT
1 stop9h 31m
American Airlines
Deal found 7/14![American Airlines logo]()
$433
This United Airlines deal was found by Cheapflights users on 7/14. 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.
Thu 8/135:00 am
ONT
- JAX
1 stop7h 33m
United Airlines
Tue 8/188:15 am
JAX
- ONT
1 stop7h 35m
United Airlines
Deal found 7/14![United Airlines logo]()
$387
This American Airlines deal was found by Cheapflights users on 7/13. 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.
Thu 8/136:15 am
ONT
- JAX
2 stops13h 51m
American Airlines
Tue 8/187:00 am
JAX
- ONT
1 stop9h 31m
American Airlines
Deal found 7/13![American Airlines logo]()
$390
This Southwest deal was found by Cheapflights users on 7/13. 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.
Thu 8/135:40 am
ONT
- JAX
2 stops7h 35m
Southwest
Tue 8/183:35 pm
JAX
- ONT
2 stops8h 20m
Southwest
Deal found 7/13![Southwest logo]()
$424
This Southwest deal was found by Cheapflights users on 7/14. 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.
Mon 8/175:15 am
ONT
- JAX
2 stops10h 20m
Southwest
Thu 8/205:50 am
JAX
- ONT
1 stop6h 25m
Southwest
Deal found 7/14![Southwest logo]()
$328
One-way flights from Ontario to JacksonvilleSearch for one-way flight options from Ontario to Jacksonville. Find affordable one-way fares based on user searches. Data last updated July 16, 2026.
Search for one-way flight options from Ontario to Jacksonville. Find affordable one-way fares based on user searches. Data last updated July 16, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/12. 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.
Sat 8/229:37 am
ONT
- JAX
2 stops29h 33m
Frontier
Deal found 7/12![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 7/15. 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.
Wed 9/26:00 am
ONT
- JAX
2 stops33h 10m
Frontier
Deal found 7/15![Frontier logo]()
$152
This Delta deal was found by Cheapflights users on 7/13. 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 8/1010:00 pm
ONT
- JAX
1 stop7h 47m
Delta
Deal found 7/13![Delta logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 7/15. 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.
Wed 9/26:00 am
ONT
- JAX
3 stops31h 25m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$202
This United Airlines deal was found by Cheapflights users on 7/12. 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 10/316:00 am
ONT
- JAX
1 stop8h 59m
United Airlines
Deal found 7/12![United Airlines logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 7/11. 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 7/303:40 pm
ONT
- JAX
2 stops22h 54m
Frontier
Deal found 7/11![Frontier logo]()
$227
This United Airlines deal was found by Cheapflights users on 7/13. 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 10/177:00 am
ONT
- JAX
1 stop9h 09m
United Airlines
Deal found 7/13![United Airlines logo]()
$235
This United Airlines deal was found by Cheapflights users on 7/15. 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 7/315:00 am
ONT
- JAX
1 stop7h 39m
United Airlines
Deal found 7/15![United Airlines logo]()
$239
This Kiwi.com deal was found by Cheapflights users on 7/11. 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.
Tue 7/283:40 pm
ONT
- JAX
2 stops22h 54m
Frontier
Deal found 7/11![Frontier logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 7/15. 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.
Fri 7/313:40 pm
ONT
- JAX
2 stops22h 54m
Frontier
Deal found 7/15![Frontier logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 7/11. 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 7/2710:49 am
ONT
- JAX
2 stops27h 45m
Frontier
Deal found 7/11![Frontier logo]()
$245
This CheapOair deal was found by Cheapflights users on 7/10. 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 9/811:50 pm
ONT
- JAX
1 stop15h 07m
JetBlue
Deal found 7/10![JetBlue logo]()
$267
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 July 16, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $323 (Delta) |
One-way from | $148 (Kiwi.com) |
Popular in | December |
Cheapest in | January |
Average price | $546 |
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 16, 2026.
Use the filters below to find and compare flights from Ontario to Jacksonville that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Mon 8/17
5:15 am-6:35 pm
2 stops10h 20m
Jacksonville
Thu 8/20
5:50 am-9:15 am
1 stop6h 25m
$328
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Wed 8/12
7:25 am-7:40 pm
1 stop9h 15m
Jacksonville
Mon 8/24
5:50 am-9:15 am
1 stop6h 25m
$396
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Thu 11/5
6:46 am-5:57 pm
1 stop8h 11m
Jacksonville
Wed 11/11
3:39 pm-9:50 pm
1 stop9h 11m
$506
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Tue 9/22
6:00 am-11:39 pm
1 stop14h 39m
Jacksonville
Sat 9/26
5:25 pm-9:59 pm
1 stop7h 34m
$536
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Mon 8/3
10:00 pm-8:47 am
1 stop7h 47m
Jacksonville
Thu 8/6
2:29 pm-6:30 pm
1 stop7h 01m
$537
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Mon 8/3
9:40 pm-10:20 am
1 stop9h 40m
Jacksonville
Fri 8/7
4:50 pm-10:10 pm
1 stop8h 20m
$537
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Tue 10/27
5:00 am-3:29 pm
1 stop7h 29m
Jacksonville
Wed 10/28
9:25 am-8:06 pm
2 stops13h 41m
$545
Quickest round-trip
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Thu 7/30
10:00 pm-8:36 am
1 stop7h 36m
Jacksonville
Thu 8/6
2:29 pm-6:30 pm
1 stop7h 01m
$567
Cheapest one-way
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Fri 8/21
11:59 pm-4:34 pm
1 stop13h 35m
$282
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Sat 7/25
12:00 pm-12:09 am
1 stop9h 09m
$286
Showing 1-10 of 20 resultsSorted by cheapest first
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 July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
ONT-JAX
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?
Booking 43 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, January is the cheapest month in which you can book a flight from Ontario to Jacksonville (average of $368). Flying from Ontario to Jacksonville in December is currently the most expensive (average of $587). 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.
How much does it cost to fly round-trip from Ontario to Jacksonville?
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 16, 2026.
See what other customers who have flown with Southwest,Delta, andUnited 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.
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
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.
Traveling to a place near Jacksonville?
Book flights to Jacksonville if you plan to visit one of these locationsJacksonville Beach
Fernandina Beach
Orange Park
Kingsland
Waycross
Atlantic Beach
Yulee
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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 16, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$330 | Average$368 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$336 | Average$467 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$342 | Average$442 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$350 | Average$522 | FlexibilityNo cancel fee | On-time63% |