$149+ 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 20 — Aug 271
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
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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
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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 21, 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 21, 2026.
This Delta deal was found by Cheapflights users on 7/20. 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.
Sat 9/1912:17 pm
ONT
- JAX
1 stop8h 41m
Delta
Sat 9/266:00 am
JAX
- ONT
1 stop8h 05m
Delta
Deal found 7/20![Delta logo]()
$359
This Southwest deal was found by Cheapflights users on 7/18. 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.
Sat 9/126:55 am
ONT
- JAX
1 stop6h 35m
Southwest
Sat 9/266:15 am
JAX
- ONT
2 stops12h 00m
Southwest
Deal found 7/18![Southwest logo]()
$364
This Delta deal was found by Cheapflights users on 7/20. 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 9/2110:00 pm
ONT
- JAX
1 stop7h 37m
Delta
Sat 9/266:00 am
JAX
- ONT
1 stop8h 05m
Delta
Deal found 7/20![Delta logo]()
$389
This Southwest deal was found by Cheapflights users on 7/17. 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 8/1311:00 am
ONT
- JAX
1 stop7h 45m
Southwest
Tue 8/186:45 am
JAX
- ONT
2 stops8h 55m
Southwest
Deal found 7/17![Southwest logo]()
$394
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 8/86:00 am
ONT
- JAX
2 stops32h 34m
Multiple Airlines
Wed 8/129:33 am
JAX
- ONT
1 stop8h 41m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$396
This Delta deal was found by Cheapflights users on 7/21. 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.
Sat 9/1912:17 pm
ONT
- JAX
1 stop8h 41m
Delta
Thu 10/155:05 am
JAX
- ONT
1 stop9h 03m
Delta
Deal found 7/21![Delta logo]()
$399
This Southwest deal was found by Cheapflights users on 7/18. 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.
Sat 8/86:55 am
ONT
- JAX
1 stop6h 35m
Southwest
Wed 8/128:55 am
JAX
- ONT
1 stop8h 30m
Southwest
Deal found 7/18![Southwest logo]()
$414
This Delta deal was found by Cheapflights users on 7/20. 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.
Sun 9/2010:00 pm
ONT
- JAX
1 stop7h 37m
Delta
Sat 9/267:15 am
JAX
- ONT
1 stop6h 50m
Delta
Deal found 7/20![Delta logo]()
$418
This Delta deal was found by Cheapflights users on 7/20. 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 8/1012:00 pm
ONT
- JAX
1 stop8h 55m
Delta
Sat 8/157:05 am
JAX
- ONT
1 stop6h 37m
Delta
Deal found 7/20![Delta logo]()
$419
This Delta deal was found by Cheapflights users on 7/16. 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 10/712:18 pm
ONT
- JAX
1 stop6h 26m
Delta
Tue 10/135:05 am
JAX
- ONT
1 stop9h 03m
Delta
Deal found 7/16![Delta logo]()
$421
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 21, 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 21, 2026.
This Delta deal was found by Cheapflights users on 7/20. 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 9/2110:00 pm
ONT
- JAX
1 stop7h 37m
Delta
Sat 9/266:00 am
JAX
- ONT
1 stop8h 05m
Delta
Deal found 7/20![Delta logo]()
$389
This Southwest deal was found by Cheapflights users on 7/18. 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.
Sun 9/138:30 am
ONT
- JAX
1 stop11h 00m
Southwest
Thu 9/175:50 am
JAX
- ONT
1 stop6h 25m
Southwest
Deal found 7/18![Southwest logo]()
$423
This United Airlines deal was found by Cheapflights users on 7/16. 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 8/155:00 am
ONT
- JAX
1 stop7h 33m
United Airlines
Sat 8/224:45 pm
JAX
- ONT
1 stop8h 50m
United Airlines
Deal found 7/16![United Airlines logo]()
$497
This Delta deal was found by Cheapflights users on 7/20. 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 8/1012:00 pm
ONT
- JAX
1 stop8h 55m
Delta
Thu 8/136:00 am
JAX
- ONT
1 stop7h 42m
Delta
Deal found 7/20![Delta logo]()
$389
This Southwest deal was found by Cheapflights users on 7/18. 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 9/45:15 am
ONT
- JAX
2 stops8h 00m
Southwest
Mon 9/75:50 am
JAX
- ONT
1 stop6h 25m
Southwest
Deal found 7/18![Southwest logo]()
$440
This Delta deal was found by Cheapflights users on 7/20. 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.
Sun 9/2010:00 pm
ONT
- JAX
1 stop9h 08m
Delta
Sat 10/106:10 am
JAX
- ONT
1 stop7h 58m
Delta
Deal found 7/20![Delta logo]()
$418
This Southwest deal was found by Cheapflights users on 7/20. 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 9/411:00 am
ONT
- JAX
1 stop7h 45m
Southwest
Sun 9/63:45 pm
JAX
- ONT
1 stop9h 20m
Southwest
Deal found 7/20![Southwest logo]()
$448
This Delta deal was found by Cheapflights users on 7/16. 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 10/712:18 pm
ONT
- JAX
1 stop6h 26m
Delta
Tue 10/135:05 am
JAX
- ONT
1 stop9h 03m
Delta
Deal found 7/16![Delta logo]()
$421
This United Airlines deal was found by Cheapflights users on 7/17. 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 8/155:00 am
ONT
- JAX
1 stop7h 33m
United Airlines
Tue 8/254:45 pm
JAX
- ONT
1 stop8h 50m
United Airlines
Deal found 7/17![United Airlines logo]()
$524
This United Airlines deal was found by Cheapflights users on 7/20. 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 8/217:00 am
ONT
- JAX
1 stop9h 25m
United Airlines
Tue 8/254:45 pm
JAX
- ONT
1 stop8h 50m
United Airlines
Deal found 7/20![United Airlines logo]()
$528
This United Airlines deal was found by Cheapflights users on 7/21. 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.
Mon 9/211:56 pm
ONT
- JAX
2 stops30h 24m
United Airlines
Sat 10/103:00 pm
JAX
- ONT
1 stop8h 58m
United Airlines
Deal found 7/21![United Airlines logo]()
$542
Last-minute flights from Ontario to JacksonvilleDiscover last-minute flight deals from Ontario to Jacksonville. Data last updated July 21, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Jacksonville. Data last updated July 21, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 8/86:00 am
ONT
- JAX
2 stops32h 34m
Multiple Airlines
Wed 8/129:33 am
JAX
- ONT
1 stop8h 41m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$396
This Southwest deal was found by Cheapflights users on 7/18. 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.
Sat 8/86:55 am
ONT
- JAX
1 stop6h 35m
Southwest
Wed 8/128:55 am
JAX
- ONT
1 stop8h 30m
Southwest
Deal found 7/18![Southwest logo]()
$414
This Delta deal was found by Cheapflights users on 7/20. 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 8/1012:00 pm
ONT
- JAX
1 stop8h 55m
Delta
Sat 8/157:05 am
JAX
- ONT
1 stop6h 37m
Delta
Deal found 7/20![Delta logo]()
$419
This Delta deal was found by Cheapflights users on 7/20. 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
Thu 8/136:00 am
JAX
- ONT
1 stop7h 42m
Delta
Deal found 7/20![Delta logo]()
$359
This Delta deal was found by Cheapflights users on 7/20. 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
Sat 8/156:00 am
JAX
- ONT
1 stop7h 42m
Delta
Deal found 7/20![Delta logo]()
$389
This Delta deal was found by Cheapflights users on 7/18. 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 8/127:05 am
ONT
- JAX
1 stop6h 24m
Delta
Thu 8/205:34 pm
JAX
- ONT
1 stop7h 18m
Delta
Deal found 7/18![Delta logo]()
$448
This Southwest deal was found by Cheapflights users on 7/17. 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 8/1311:00 am
ONT
- JAX
1 stop7h 45m
Southwest
Tue 8/186:45 am
JAX
- ONT
2 stops8h 55m
Southwest
Deal found 7/17![Southwest logo]()
$394
This American Airlines deal was found by Cheapflights users on 7/18. 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 8/256:00 am
ONT
- JAX
1 stop7h 26m
American Airlines
Sun 8/307:00 am
JAX
- ONT
1 stop7h 43m
American Airlines
Deal found 7/18![American Airlines logo]()
$418
This Southwest deal was found by Cheapflights users on 7/20. 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.
Tue 8/2510:55 am
ONT
- JAX
1 stop6h 30m
Southwest
Sun 8/301:45 pm
JAX
- ONT
2 stops8h 50m
Southwest
Deal found 7/20![Southwest logo]()
$423
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 21, 2026.
Search for one-way flight options from Ontario to Jacksonville. Find affordable one-way fares based on user searches. Data last updated July 21, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 7/16![Frontier logo]()
$149
This United Airlines deal was found by Cheapflights users on 7/16. 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 8/225:00 am
ONT
- JAX
1 stop7h 33m
United Airlines
Deal found 7/16![United Airlines logo]()
$162
This Southwest deal was found by Cheapflights users on 7/20. 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 9/27:45 am
ONT
- JAX
2 stops8h 55m
Southwest
Deal found 7/20![Southwest logo]()
$167
This Delta deal was found by Cheapflights users on 7/20. 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.
Sat 8/2212:00 pm
ONT
- JAX
1 stop6h 43m
Delta
Deal found 7/20![Delta logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 7/17. 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 7/17![Frontier logo]()
$246
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 8/223:40 pm
ONT
- JAX
3 stops25h 28m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$247
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 9/23:40 pm
ONT
- JAX
3 stops21h 45m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$253
This American Airlines deal was found by Cheapflights users on 7/19. 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 9/912:37 pm
ONT
- JAX
1 stop6h 45m
American Airlines
Deal found 7/19![American Airlines logo]()
$256
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 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $359 (Delta) |
One-way from | $149 (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 21, 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 9/21
10:00 pm-8:37 am
1 stop7h 37m
Jacksonville
Sat 9/26
6:00 am-11:05 am
1 stop8h 05m
$389
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Mon 8/10
12:00 pm-11:55 pm
1 stop8h 55m
Jacksonville
Thu 8/13
6:00 am-10:42 am
1 stop7h 42m
$389
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Sun 9/20
10:00 pm-10:08 am
1 stop9h 08m
Jacksonville
Sat 10/10
6:10 am-11:08 am
1 stop7h 58m
$418
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Wed 10/7
12:18 pm-9:44 pm
1 stop6h 26m
Jacksonville
Tue 10/13
5:05 am-11:08 am
1 stop9h 03m
$421
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Sun 9/13
8:30 am-10:30 pm
1 stop11h 00m
Jacksonville
Thu 9/17
5:50 am-9:15 am
1 stop6h 25m
$423
Quickest round-trip
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Fri 9/4
5:15 am-4:15 pm
2 stops8h 00m
Jacksonville
Mon 9/7
5:50 am-9:15 am
1 stop6h 25m
$440
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Fri 9/4
11:00 am-9:45 pm
1 stop7h 45m
Jacksonville
Sun 9/6
3:45 pm-10:05 pm
1 stop9h 20m
$448
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Sat 8/15
5:00 am-3:33 pm
1 stop7h 33m
Jacksonville
Sat 8/22
4:45 pm-10:35 pm
1 stop8h 50m
$497
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Sat 8/15
5:00 am-3:33 pm
1 stop7h 33m
Jacksonville
Tue 8/25
4:45 pm-10:35 pm
1 stop8h 50m
$524
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Fri 8/21
7:00 am-7:25 pm
1 stop9h 25m
Jacksonville
Tue 8/25
4:45 pm-10:35 pm
1 stop8h 50m
$528
Showing 1-10 of 18 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 $583). 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 21, 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.
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Comfort
8.0
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 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$330 | Average$368 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$336 | Average$469 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$342 | Average$453 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$350 | Average$522 | FlexibilityNo cancel fee | On-time63% |