$189+ 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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — JAX
Sep 22 — Sep 291
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
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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 August 23, 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 August 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/22. 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 9/2311:45 am -
2 stops28h 16m
Sat 9/269:44 am -
1 stop9h 50m
Deal found 8/22![Multiple Airlines logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:04 am -
1 stop6h 58m
Mon 10/267:46 pm -
2 stops41h 49m
Deal found 8/20![Multiple Airlines logo]()
$345
This Kiwi.com deal was found by Cheapflights users on 8/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:04 am -
1 stop6h 58m
Fri 10/167:46 pm -
2 stops31h 04m
Deal found 8/21![Multiple Airlines logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 8/22. 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 9/196:15 am -
2 stops9h 46m
Sat 9/269:44 am -
1 stop9h 50m
Deal found 8/22![Multiple Airlines logo]()
$362
This Kiwi.com deal was found by Cheapflights users on 8/18. 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.
Fri 9/118:24 pm -
1 stop20h 38m
Tue 9/157:46 pm -
2 stops31h 01m
Deal found 8/18![Multiple Airlines logo]()
$373
This Kiwi.com deal was found by Cheapflights users on 8/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/22:30 pm -
1 stop26h 32m
Tue 10/67:46 pm -
2 stops31h 01m
Deal found 8/19![Multiple Airlines logo]()
$375
This Delta deal was found by Cheapflights users on 8/22. 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 9/197:05 am -
1 stop9h 17m
Sat 9/262:32 pm -
1 stop7h 09m
Deal found 8/22![Delta logo]()
$377
This Southwest deal was found by Cheapflights users on 8/22. 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 10/222:40 pm -
1 stop6h 00m
Tue 10/276:40 am -
2 stops11h 55m
Deal found 8/22![Southwest logo]()
$382
This Southwest deal was found by Cheapflights users on 8/22. 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 9/1911:55 pm -
2 stops14h 55m
Sat 9/2612:25 pm -
2 stops10h 40m
Deal found 8/22![Southwest logo]()
$393
This Delta deal was found by Cheapflights users on 8/18. 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.
Sun 9/67:05 am -
1 stop9h 40m
Mon 9/286:59 pm -
1 stop6h 25m
Deal found 8/18![Delta logo]()
$394
This Delta deal was found by Cheapflights users on 8/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/212:19 pm -
1 stop8h 39m
Tue 10/62:28 pm -
1 stop8h 57m
Deal found 8/19![Delta logo]()
$395
This Delta deal was found by Cheapflights users on 8/18. 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 9/212:00 pm -
1 stop8h 55m
Sat 9/191:02 pm -
1 stop8h 39m
Deal found 8/18![Delta logo]()
$397
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 August 23, 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 August 23, 2026.
This Delta deal was found by Cheapflights users on 8/22. 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 9/197:05 am -
1 stop9h 17m
Sat 9/262:32 pm -
1 stop7h 09m
Deal found 8/22![Delta logo]()
$377
This Southwest deal was found by Cheapflights users on 8/22. 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 10/221:05 pm -
2 stops7h 35m
Tue 10/276:40 am -
2 stops11h 55m
Deal found 8/22![Southwest logo]()
$405
This United Airlines deal was found by Cheapflights users on 8/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:00 am -
1 stop7h 23m
Mon 11/164:15 pm -
1 stop7h 36m
Deal found 8/18![United Airlines logo]()
$487
This Southwest deal was found by Cheapflights users on 8/18. 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 9/115:15 am -
2 stops10h 20m
Tue 9/156:45 am -
2 stops8h 55m
Deal found 8/18![Southwest logo]()
$442
This United Airlines deal was found by Cheapflights users on 8/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:00 am -
1 stop9h 09m
Sat 10/103:04 pm -
1 stop8h 54m
Deal found 8/18![United Airlines logo]()
$524
This United Airlines deal was found by Cheapflights users on 8/22. 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 11/56:00 am -
1 stop7h 23m
Fri 11/135:29 pm -
1 stop7h 11m
Deal found 8/22![United Airlines logo]()
$542
This United Airlines deal was found by Cheapflights users on 8/22. 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 9/115:00 am -
1 stop7h 33m
Tue 9/154:45 pm -
2 stops23h 05m
Deal found 8/22![United Airlines logo]()
$552
This United Airlines deal was found by Cheapflights users on 8/21. 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.
Sat 9/57:00 am -
1 stop9h 19m
Wed 9/94:45 pm -
1 stop9h 14m
Deal found 8/21![United Airlines logo]()
$576
This United Airlines deal was found by Cheapflights users on 8/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/27:00 am -
1 stop9h 25m
Sun 9/65:00 pm -
1 stop7h 59m
Deal found 8/18![United Airlines logo]()
$579
This United Airlines deal was found by Cheapflights users on 8/21. 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.
Thu 10/156:00 am -
1 stop14h 20m
Mon 10/194:58 pm -
1 stop8h 51m
Deal found 8/21![United Airlines logo]()
$586
This United Airlines deal was found by Cheapflights users on 8/21. 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 12/2111:52 pm -
1 stop7h 59m
Wed 12/305:19 pm -
1 stop7h 52m
Deal found 8/21![United Airlines logo]()
$597
Last-minute flights from Ontario to JacksonvilleDiscover last-minute flight deals from Ontario to Jacksonville. Data last updated August 23, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Jacksonville. Data last updated August 23, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 8/18. 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.
Tue 9/112:00 pm -
1 stop6h 43m
Fri 9/255:34 pm -
1 stop7h 50m
Deal found 8/18![Delta logo]()
$415
This Delta deal was found by Cheapflights users on 8/18. 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 9/212:00 pm -
1 stop8h 55m
Sat 9/191:02 pm -
1 stop8h 39m
Deal found 8/18![Delta logo]()
$397
This Delta deal was found by Cheapflights users on 8/18. 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.
Sat 9/512:00 pm -
1 stop6h 43m
Fri 9/256:59 pm -
1 stop6h 25m
Deal found 8/18![Delta logo]()
$412
This Delta deal was found by Cheapflights users on 8/18. 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.
Sun 9/67:05 am -
1 stop9h 40m
Mon 9/286:59 pm -
1 stop6h 25m
Deal found 8/18![Delta logo]()
$394
This United Airlines deal was found by Cheapflights users on 8/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/67:00 am -
1 stop9h 25m
Wed 9/911:40 am -
2 stops12h 13m
Deal found 8/18![United Airlines logo]()
$399
This Kiwi.com deal was found by Cheapflights users on 8/18. 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.
Fri 9/118:24 pm -
1 stop20h 38m
Tue 9/157:46 pm -
2 stops31h 01m
Deal found 8/18![Multiple Airlines logo]()
$373
This Kiwi.com deal was found by Cheapflights users on 8/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/188:24 pm -
1 stop20h 38m
Fri 9/256:10 pm -
2 stops32h 37m
Deal found 8/21![Multiple Airlines logo]()
$411
This Delta deal was found by Cheapflights users on 8/21. 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.
Fri 9/1810:00 pm -
1 stop8h 38m
Fri 9/255:34 pm -
1 stop7h 50m
Deal found 8/21![Delta logo]()
$413
This Kiwi.com deal was found by Cheapflights users on 8/22. 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 9/196:15 am -
2 stops9h 46m
Sat 9/269:44 am -
1 stop9h 50m
Deal found 8/22![Multiple Airlines logo]()
$362
This Delta deal was found by Cheapflights users on 8/22. 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 9/197:05 am -
1 stop9h 17m
Sat 9/262:32 pm -
1 stop7h 09m
Deal found 8/22![Delta logo]()
$377
This Southwest deal was found by Cheapflights users on 8/22. 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 9/1911:55 pm -
2 stops14h 55m
Sat 9/2612:25 pm -
2 stops10h 40m
Deal found 8/22![Southwest logo]()
$393
This Kiwi.com deal was found by Cheapflights users on 8/22. 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 9/2311:45 am -
2 stops28h 16m
Sat 9/269:44 am -
1 stop9h 50m
Deal found 8/22![Multiple Airlines logo]()
$323
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 August 23, 2026.
Search for one-way flight options from Ontario to Jacksonville. Find affordable one-way fares based on user searches. Data last updated August 23, 2026.
This Delta deal was found by Cheapflights users on 8/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/312:17 pm -
1 stop6h 53m
Deal found 8/19![Delta logo]()
$189
This Delta deal was found by Cheapflights users on 8/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/512:00 pm -
1 stop6h 43m
Deal found 8/19![Delta logo]()
$206
This Delta deal was found by Cheapflights users on 8/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/210:00 pm -
1 stop7h 37m
Deal found 8/19![Delta logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 8/18. 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.
Mon 9/710:17 pm -
2 stops41h 44m
Deal found 8/18![Frontier logo]()
$220
This Southwest deal was found by Cheapflights users on 8/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2310:55 am -
1 stop6h 35m
Deal found 8/21![Southwest logo]()
$226
This United Airlines deal was found by Cheapflights users on 8/22. 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 10/207:00 am -
1 stop9h 09m
Deal found 8/22![United Airlines logo]()
$244
This United Airlines deal was found by Cheapflights users on 8/22. 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.
Sun 9/67:00 am -
1 stop9h 25m
Deal found 8/22![United Airlines logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 8/18. 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.
Mon 8/319:33 am -
2 stops29h 37m
Deal found 8/18![Frontier logo]()
$270
This American Airlines deal was found by Cheapflights users on 8/18. 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.
Mon 10/121:05 pm -
1 stop6h 46m
Deal found 8/18![American Airlines logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 8/18. 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.
Thu 9/33:40 pm -
2 stops23h 30m
Deal found 8/18![Frontier logo]()
$281
This Delta deal was found by Cheapflights users on 8/22. 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 9/112:00 pm -
1 stop6h 43m
Deal found 8/22![Delta logo]()
$291
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 August 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $323 (Kiwi.com) |
One-way from | $189 (Delta) |
Popular in | December |
Cheapest in | January |
Average price | $438 |
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 7,457,451 searches. Data last updated August 23, 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 Ontario - JAX Jacksonville
ONTJAX
Ontario
Sat 9/19
7:05 am-7:22 pm
1 stop9h 17m
Jacksonville
Sat 9/26
2:32 pm-6:41 pm
1 stop7h 09m
$377
OntarioJacksonville
ONT Ontario - JAX Jacksonville
ONTJAX
Ontario
Thu 10/22
1:05 pm-11:40 pm
2 stops7h 35m
Jacksonville
Tue 10/27
6:40 am-3:35 pm
2 stops11h 55m
$405
OntarioJacksonville
ONT Ontario - JAX Jacksonville
ONTJAX
Ontario
Fri 9/11
5:15 am-6:35 pm
2 stops10h 20m
Jacksonville
Tue 9/15
6:45 am-12:40 pm
2 stops8h 55m
$442
OntarioJacksonville
ONT Ontario - JAX Jacksonville
ONTJAX
Ontario
Thu 11/12
6:00 am-4:23 pm
1 stop7h 23m
Jacksonville
Mon 11/16
4:15 pm-8:51 pm
1 stop7h 36m
$487
OntarioJacksonville
ONT Ontario - JAX Jacksonville
ONTJAX
Ontario
Wed 10/7
7:00 am-7:09 pm
1 stop9h 09m
Jacksonville
Sat 10/10
3:04 pm-8:58 pm
1 stop8h 54m
$524
Quickest round-trip
OntarioJacksonville
ONT Ontario - JAX Jacksonville
ONTJAX
Ontario
Thu 11/5
6:00 am-4:23 pm
1 stop7h 23m
Jacksonville
Fri 11/13
5:29 pm-9:40 pm
1 stop7h 11m
$542
OntarioJacksonville
ONT Ontario - JAX Jacksonville
ONTJAX
Ontario
Fri 9/11
5:00 am-3:33 pm
1 stop7h 33m
Jacksonville
Tue 9/15
4:45 pm-12:50 pm
2 stops23h 05m
$552
OntarioJacksonville
ONT Ontario - JAX Jacksonville
ONTJAX
Ontario
Sat 9/5
7:00 am-7:19 pm
1 stop9h 19m
Jacksonville
Wed 9/9
4:45 pm-10:59 pm
1 stop9h 14m
$576
OntarioJacksonville
ONT Ontario - JAX Jacksonville
ONTJAX
Ontario
Wed 9/2
7:00 am-7:25 pm
1 stop9h 25m
Jacksonville
Sun 9/6
5:00 pm-9:59 pm
1 stop7h 59m
$579
OntarioJacksonville
ONT Ontario - JAX Jacksonville
ONTJAX
Ontario
Thu 10/15
6:00 am-11:20 pm
1 stop14h 20m
Jacksonville
Mon 10/19
4:58 pm-10:49 pm
1 stop8h 51m
$586
Showing 1-10 of 23 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 August.
| 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
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 $582). 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?
Airfare is below average for this route at the moment.
Ontario to Jacksonville flights typically cost between $454 and $783 in September.The cheapest round-trip price found within the last 5 days was $323 on Multiple Airlines (Sep 23-Sep 26).
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 August 23, 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
Comfort
8.0
Entertainment
7.5
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Crew
8.6
Boarding
8.1
Food
7.0
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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Find flights from Ontario to Jacksonville, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Jacksonville
Explore flights to Jacksonville departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 23, 2026.
Ontario and Jacksonville flights
Browse other Ontario and Jacksonville flight options. Last updated on August 23, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on August 23, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 7,457,451 searches. Data last updated August 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$302 | Average$442 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$330 | Average$368 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$342 | Average$473 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$374 | Average$562 | FlexibilityNo cancel fee | On-time63% |