$106+ 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 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — JAX
Mar 13 — Mar 201
1 adult, Economy
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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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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 February 11, 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 February 11, 2026.
This Delta deal was found by Cheapflights users on 2/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1710:25 pm
ONT
- JAX
1 stop7h 19m
Delta
Wed 3/255:30 am
JAX
- ONT
1 stop9h 17m
Delta
Deal found 2/11![Delta logo]()
$311
This American Airlines deal was found by Cheapflights users on 2/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/117:59 pm
ONT
- JAX
2 stops9h 52m
American Airlines
Wed 3/183:55 pm
JAX
- ONT
1 stop8h 29m
American Airlines
Deal found 2/11![American Airlines logo]()
$316
This Delta deal was found by Cheapflights users on 2/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2410:25 pm
ONT
- JAX
1 stop8h 53m
Delta
Tue 4/75:30 am
JAX
- ONT
2 stops9h 53m
Delta
Deal found 2/10![Delta logo]()
$326
This United Airlines deal was found by Cheapflights users on 2/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:00 am
ONT
- JAX
1 stop9h 44m
United Airlines
Sat 5/95:25 pm
JAX
- ONT
1 stop7h 33m
United Airlines
Deal found 2/11![United Airlines logo]()
$327
This Delta deal was found by Cheapflights users on 2/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/1610:25 pm
ONT
- JAX
1 stop8h 53m
Delta
Wed 3/256:30 am
JAX
- ONT
1 stop8h 17m
Delta
Deal found 2/11![Delta logo]()
$332
This American Airlines deal was found by Cheapflights users on 2/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1512:19 pm
ONT
- JAX
1 stop7h 25m
American Airlines
Sat 4/258:54 am
JAX
- ONT
2 stops10h 28m
American Airlines
Deal found 2/10![American Airlines logo]()
$337
This Delta deal was found by Cheapflights users on 2/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2410:25 pm
ONT
- JAX
1 stop8h 53m
Delta
Sat 4/115:30 am
JAX
- ONT
1 stop9h 17m
Delta
Deal found 2/10![Delta logo]()
$342
This Delta deal was found by Cheapflights users on 2/9. 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 4/157:00 am
ONT
- JAX
2 stops13h 59m
Delta
Sat 4/253:57 pm
JAX
- ONT
1 stop8h 03m
Delta
Deal found 2/9![Delta logo]()
$347
This Southwest deal was found by Cheapflights users on 2/9. 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 3/210:40 am
ONT
- JAX
1 stop7h 55m
Southwest
Thu 3/55:10 pm
JAX
- ONT
1 stop8h 35m
Southwest
Deal found 2/9![Southwest logo]()
$353
This United Airlines deal was found by Cheapflights users on 2/9. 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 3/26:37 pm
ONT
- JAX
2 stops12h 04m
United Airlines
Thu 3/55:22 pm
JAX
- ONT
1 stop8h 14m
United Airlines
Deal found 2/9![United Airlines logo]()
$358
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 February 11, 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 February 11, 2026.
This Delta deal was found by Cheapflights users on 2/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2410:25 pm
ONT
- JAX
1 stop8h 53m
Delta
Tue 4/77:35 am
JAX
- ONT
1 stop7h 12m
Delta
Deal found 2/10![Delta logo]()
$321
This Southwest deal was found by Cheapflights users on 2/9. 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 3/210:40 am
ONT
- JAX
1 stop7h 55m
Southwest
Thu 3/55:10 pm
JAX
- ONT
1 stop8h 35m
Southwest
Deal found 2/9![Southwest logo]()
$353
This American Airlines deal was found by Cheapflights users on 2/9. 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 4/1512:19 pm
ONT
- JAX
2 stops9h 02m
American Airlines
Sat 4/253:52 pm
JAX
- ONT
2 stops10h 54m
American Airlines
Deal found 2/9![American Airlines logo]()
$377
This Delta deal was found by Cheapflights users on 2/9. 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 4/157:00 am
ONT
- JAX
2 stops13h 59m
Delta
Sat 4/253:57 pm
JAX
- ONT
1 stop8h 03m
Delta
Deal found 2/9![Delta logo]()
$347
This Delta deal was found by Cheapflights users on 2/9. 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 4/210:25 pm
ONT
- JAX
1 stop7h 21m
Delta
Tue 4/76:30 am
JAX
- ONT
1 stop8h 17m
Delta
Deal found 2/9![Delta logo]()
$374
This Delta deal was found by Cheapflights users on 2/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2410:25 pm
ONT
- JAX
1 stop7h 19m
Delta
Wed 4/86:30 am
JAX
- ONT
1 stop8h 17m
Delta
Deal found 2/11![Delta logo]()
$385
This Delta deal was found by Cheapflights users on 2/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1110:25 pm
ONT
- JAX
1 stop7h 14m
Delta
Wed 3/185:30 am
JAX
- ONT
1 stop9h 17m
Delta
Deal found 2/11![Delta logo]()
$385
This Delta deal was found by Cheapflights users on 2/9. 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 5/47:05 am
ONT
- JAX
1 stop8h 49m
Delta
Fri 5/85:15 am
JAX
- ONT
1 stop8h 42m
Delta
Deal found 2/9![Delta logo]()
$395
This Delta deal was found by Cheapflights users on 2/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1112:57 pm
ONT
- JAX
1 stop8h 02m
Delta
Sat 3/215:30 am
JAX
- ONT
1 stop9h 17m
Delta
Deal found 2/11![Delta logo]()
$400
Last-minute flights from Ontario to JacksonvilleDiscover last-minute flight deals from Ontario to Jacksonville. Data last updated February 11, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Jacksonville. Data last updated February 11, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 2/9. 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 3/210:40 am
ONT
- JAX
1 stop7h 55m
Southwest
Thu 3/55:10 pm
JAX
- ONT
1 stop8h 35m
Southwest
Deal found 2/9![Southwest logo]()
$353
This United Airlines deal was found by Cheapflights users on 2/9. 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 3/26:37 pm
ONT
- JAX
2 stops12h 04m
United Airlines
Thu 3/55:22 pm
JAX
- ONT
1 stop8h 14m
United Airlines
Deal found 2/9![United Airlines logo]()
$358
This American Airlines deal was found by Cheapflights users on 2/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/117:59 pm
ONT
- JAX
2 stops9h 52m
American Airlines
Wed 3/183:55 pm
JAX
- ONT
1 stop8h 29m
American Airlines
Deal found 2/11![American Airlines logo]()
$316
This Delta deal was found by Cheapflights users on 2/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1110:25 pm
ONT
- JAX
1 stop7h 14m
Delta
Wed 3/185:30 am
JAX
- ONT
1 stop9h 17m
Delta
Deal found 2/11![Delta logo]()
$385
This Delta deal was found by Cheapflights users on 2/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1110:25 pm
ONT
- JAX
1 stop7h 14m
Delta
Fri 3/203:59 pm
JAX
- ONT
1 stop8h 01m
Delta
Deal found 2/11![Delta logo]()
$400
This Delta deal was found by Cheapflights users on 2/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/1410:25 pm
ONT
- JAX
1 stop8h 14m
Delta
Wed 3/257:35 am
JAX
- ONT
1 stop7h 12m
Delta
Deal found 2/11![Delta logo]()
$379
This Delta deal was found by Cheapflights users on 2/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/1610:25 pm
ONT
- JAX
1 stop8h 53m
Delta
Wed 3/256:30 am
JAX
- ONT
1 stop8h 17m
Delta
Deal found 2/11![Delta logo]()
$332
This Southwest deal was found by Cheapflights users on 2/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/169:55 pm
ONT
- JAX
2 stops9h 35m
Southwest
Thu 3/197:45 am
JAX
- ONT
1 stop9h 20m
Southwest
Deal found 2/10![Southwest logo]()
$398
This Delta deal was found by Cheapflights users on 2/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1710:25 pm
ONT
- JAX
1 stop7h 19m
Delta
Wed 3/255:30 am
JAX
- ONT
1 stop9h 17m
Delta
Deal found 2/11![Delta logo]()
$311
This Delta deal was found by Cheapflights users on 2/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2410:25 pm
ONT
- JAX
1 stop8h 53m
Delta
Tue 4/75:30 am
JAX
- ONT
2 stops9h 53m
Delta
Deal found 2/10![Delta logo]()
$326
This Delta deal was found by Cheapflights users on 2/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2410:25 pm
ONT
- JAX
1 stop8h 53m
Delta
Sat 4/115:30 am
JAX
- ONT
1 stop9h 17m
Delta
Deal found 2/10![Delta logo]()
$342
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 February 11, 2026.
Search for one-way flight options from Ontario to Jacksonville. Find affordable one-way fares based on user searches. Data last updated February 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2812:59 am
ONT
- JAX
2 stops37h 14m
Frontier
Deal found 2/10![Frontier logo]()
$106
This Trip.com deal was found by Cheapflights users on 2/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/16:10 am
ONT
- JAX
2 stops33h 34m
Frontier
Deal found 2/9![Frontier logo]()
$136
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Wed 4/296:05 am
ONT
- JAX
1 stop7h 15m
United Airlines
Deal found 2/10![United Airlines logo]()
$156
This Delta deal was found by Cheapflights users on 2/9. 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 5/1912:10 pm
ONT
- JAX
1 stop7h 00m
Delta
Deal found 2/9![Delta logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/209:43 pm
ONT
- JAX
2 stops17h 58m
Frontier
Deal found 2/10![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 2/9. 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.
Sun 3/86:15 am
ONT
- JAX
2 stops34h 18m
Frontier
Deal found 2/9![Frontier logo]()
$175
This Delta deal was found by Cheapflights users on 2/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/410:25 pm
ONT
- JAX
1 stop8h 16m
Delta
Deal found 2/11![Delta logo]()
$177
This Delta deal was found by Cheapflights users on 2/9. 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 3/71:15 pm
ONT
- JAX
1 stop6h 43m
Delta
Deal found 2/9![Delta logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 4/2812:59 am
ONT
- JAX
3 stops34h 33m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 2/197:22 pm
ONT
- JAX
3 stops20h 55m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$205
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 February 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $311 (Delta) |
One-way from | $106 (Kiwi.com) |
Popular in | November |
Cheapest in | January |
Average price | $444 |
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 February 11, 2026.
Use the filters below to find and compare flights from Ontario to Jacksonville that are best for you.
Fly from
Ontario
Fly to
Jacksonville
Route
Depart
Return
Price
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Tue 3/24
10:25 pm-10:18 am
1 stop8h 53m
Jacksonville
Tue 4/7
7:35 am-11:47 am
1 stop7h 12m
$321
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Wed 4/15
7:00 am-11:59 pm
2 stops13h 59m
Jacksonville
Sat 4/25
3:57 pm-9:00 pm
1 stop8h 03m
$347
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Mon 3/2
10:40 am-9:35 pm
1 stop7h 55m
Jacksonville
Thu 3/5
5:10 pm-10:45 pm
1 stop8h 35m
$353
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Thu 4/2
10:25 pm-8:46 am
1 stop7h 21m
Jacksonville
Tue 4/7
6:30 am-11:47 am
1 stop8h 17m
$374
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Wed 4/15
12:19 pm-12:21 am
2 stops9h 02m
Jacksonville
Sat 4/25
3:52 pm-11:46 pm
2 stops10h 54m
$377
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Tue 3/24
10:25 pm-8:44 am
1 stop7h 19m
Jacksonville
Wed 4/8
6:30 am-11:47 am
1 stop8h 17m
$385
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Wed 3/11
10:25 pm-8:39 am
1 stop7h 14m
Jacksonville
Wed 3/18
5:30 am-11:47 am
1 stop9h 17m
$385
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Mon 5/4
7:05 am-6:54 pm
1 stop8h 49m
Jacksonville
Fri 5/8
5:15 am-10:57 am
1 stop8h 42m
$395
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Wed 3/11
12:57 pm-11:59 pm
1 stop8h 02m
Jacksonville
Sat 3/21
5:30 am-11:47 am
1 stop9h 17m
$400
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Tue 4/28
12:59 am-5:13 pm
2 stops37h 14m
$109
Showing 1-10 of 19 results
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 February.
| 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?
Use this chart to determine the optimal time to book a round-trip flight from Ontario to Jacksonville. Price data was last updated on February 6, 2026.
Booking 62 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, April is the cheapest month in which you can book a flight from Ontario to Jacksonville (average of $80). Flying from Ontario to Jacksonville in July is currently the most expensive (average of $343). 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 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 February 11, 2026.
See what other customers who have flown with Southwest, Delta, and United 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.
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
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
Orange Park
Fernandina Beach
Kingsland
Waycross
Yulee
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Other flights to Jacksonville
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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 February 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$306 | Average$441 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$306 | Average$450 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$330 | Average$442 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$342 | Average$442 | FlexibilityNo cancel fee | On-time63% |