$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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — JAX
Aug 3 — Aug 101
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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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 4, 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 4, 2026.
This American Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:00 am
ONT
- JAX
1 stop7h 26m
American Airlines
Sat 8/226:42 am
JAX
- ONT
1 stop8h 01m
American Airlines
Deal found 7/2![American Airlines logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 7/2. 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 8/159:36 am
ONT
- JAX
2 stops28h 58m
Multiple Airlines
Sat 8/229:33 am
JAX
- ONT
1 stop9h 21m
Multiple Airlines
Deal found 7/2![Multiple Airlines logo]()
$326
This Southwest deal was found by Cheapflights users on 7/2. 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 8/157:05 am
ONT
- JAX
2 stops7h 55m
Southwest
Sat 8/221:30 pm
JAX
- ONT
2 stops9h 35m
Southwest
Deal found 7/2![Southwest logo]()
$333
This United Airlines deal was found by Cheapflights users on 6/29. 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
Sat 8/2211:40 am
JAX
- ONT
1 stop9h 32m
United Airlines
Deal found 6/29![United Airlines logo]()
$340
This American Airlines deal was found by Cheapflights users on 7/1. 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 8/136:00 am
ONT
- JAX
1 stop7h 26m
American Airlines
Sat 8/226:42 am
JAX
- ONT
1 stop8h 01m
American Airlines
Deal found 7/1![American Airlines logo]()
$341
This Southwest deal was found by Cheapflights users on 6/29. 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
Sat 8/2212:25 pm
JAX
- ONT
2 stops10h 40m
Southwest
Deal found 6/29![Southwest logo]()
$346
This American Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/2511:59 pm
ONT
- JAX
1 stop7h 38m
American Airlines
Sat 8/17:24 am
JAX
- ONT
1 stop8h 59m
American Airlines
Deal found 7/2![American Airlines logo]()
$362
This Delta deal was found by Cheapflights users on 7/1. 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 7/2210:00 pm
ONT
- JAX
1 stop7h 36m
Delta
Tue 7/285:30 am
JAX
- ONT
1 stop8h 08m
Delta
Deal found 7/1![Delta logo]()
$371
This Kiwi.com deal was found by Cheapflights users on 6/29. 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 8/148:17 am
ONT
- JAX
2 stops30h 17m
Multiple Airlines
Sat 8/229:33 am
JAX
- ONT
1 stop9h 21m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$388
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 4, 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 4, 2026.
This Southwest deal was found by Cheapflights users on 7/3. 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 8/157:05 am
ONT
- JAX
2 stops7h 55m
Southwest
Sat 8/221:30 pm
JAX
- ONT
2 stops9h 35m
Southwest
Deal found 7/3![Southwest logo]()
$369
This United Airlines deal was found by Cheapflights users on 7/3. 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 9/17:00 am
ONT
- JAX
1 stop9h 25m
United Airlines
Wed 9/24:45 pm
JAX
- ONT
1 stop8h 50m
United Airlines
Deal found 7/3![United Airlines logo]()
$469
This American Airlines deal was found by Cheapflights users on 6/29. 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 12/2311:59 pm
ONT
- JAX
2 stops9h 00m
American Airlines
Fri 1/13:45 pm
JAX
- ONT
1 stop8h 13m
American Airlines
Deal found 6/29![American Airlines logo]()
$500
This Southwest deal was found by Cheapflights users on 7/1. 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 8/3111:00 am
ONT
- JAX
1 stop7h 45m
Southwest
Fri 9/44:50 pm
JAX
- ONT
1 stop8h 20m
Southwest
Deal found 7/1![Southwest logo]()
$418
This Southwest deal was found by Cheapflights users on 6/30. 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
Sun 8/161:45 pm
JAX
- ONT
2 stops8h 50m
Southwest
Deal found 6/30![Southwest logo]()
$428
This United Airlines deal was found by Cheapflights users on 6/29. 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 8/147:00 am
ONT
- JAX
1 stop9h 25m
United Airlines
Fri 8/213:07 pm
JAX
- ONT
1 stop8h 46m
United Airlines
Deal found 6/29![United Airlines logo]()
$477
This United Airlines deal was found by Cheapflights users on 7/1. 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 11/136:46 am
ONT
- JAX
1 stop8h 11m
United Airlines
Mon 11/163:39 pm
JAX
- ONT
1 stop9h 11m
United Airlines
Deal found 7/1![United Airlines logo]()
$528
This Southwest deal was found by Cheapflights users on 7/3. 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 8/146:20 am
ONT
- JAX
1 stop6h 55m
Southwest
Sun 8/161:45 pm
JAX
- ONT
2 stops8h 50m
Southwest
Deal found 7/3![Southwest logo]()
$482
This Southwest deal was found by Cheapflights users on 7/1. 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 7/278:00 am
ONT
- JAX
2 stops10h 40m
Southwest
Mon 8/36:20 am
JAX
- ONT
2 stops8h 50m
Southwest
Deal found 7/1![Southwest logo]()
$517
Last-minute flights from Ontario to JacksonvilleDiscover last-minute flight deals from Ontario to Jacksonville. Data last updated July 4, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Jacksonville. Data last updated July 4, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 7/1. 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 7/2210:00 pm
ONT
- JAX
1 stop7h 36m
Delta
Tue 7/285:30 am
JAX
- ONT
1 stop8h 08m
Delta
Deal found 7/1![Delta logo]()
$371
This American Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/2511:59 pm
ONT
- JAX
1 stop7h 38m
American Airlines
Sat 8/17:24 am
JAX
- ONT
1 stop8h 59m
American Airlines
Deal found 7/2![American Airlines logo]()
$362
This United Airlines deal was found by Cheapflights users on 6/29. 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
Sat 8/2211:40 am
JAX
- ONT
1 stop9h 32m
United Airlines
Deal found 6/29![United Airlines logo]()
$340
This American Airlines deal was found by Cheapflights users on 7/1. 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 8/136:00 am
ONT
- JAX
1 stop7h 26m
American Airlines
Sat 8/226:42 am
JAX
- ONT
1 stop8h 01m
American Airlines
Deal found 7/1![American Airlines logo]()
$341
This Southwest deal was found by Cheapflights users on 6/29. 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
Sat 8/2212:25 pm
JAX
- ONT
2 stops10h 40m
Southwest
Deal found 6/29![Southwest logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 6/29. 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 8/148:17 am
ONT
- JAX
2 stops30h 17m
Multiple Airlines
Sat 8/229:33 am
JAX
- ONT
1 stop9h 21m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$388
This American Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:00 am
ONT
- JAX
1 stop7h 26m
American Airlines
Sat 8/226:42 am
JAX
- ONT
1 stop8h 01m
American Airlines
Deal found 7/2![American Airlines logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 7/2. 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 8/159:36 am
ONT
- JAX
2 stops28h 58m
Multiple Airlines
Sat 8/229:33 am
JAX
- ONT
1 stop9h 21m
Multiple Airlines
Deal found 7/2![Multiple Airlines logo]()
$326
This Southwest deal was found by Cheapflights users on 7/2. 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 8/157:05 am
ONT
- JAX
2 stops7h 55m
Southwest
Sat 8/221:30 pm
JAX
- ONT
2 stops9h 35m
Southwest
Deal found 7/2![Southwest logo]()
$333
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 4, 2026.
Search for one-way flight options from Ontario to Jacksonville. Find affordable one-way fares based on user searches. Data last updated July 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/3. 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 9/110:59 am
ONT
- JAX
2 stops28h 11m
Frontier
Deal found 7/3![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 7/3. 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 7/256:00 am
ONT
- JAX
2 stops32h 34m
Frontier
Deal found 7/3![Frontier logo]()
$151
This Delta deal was found by Cheapflights users on 7/3. 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
ONT
- JAX
1 stop6h 43m
Delta
Deal found 7/3![Delta logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 7/3. 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 8/23:40 pm
ONT
- JAX
2 stops22h 54m
Frontier
Deal found 7/3![Frontier logo]()
$193
This Delta deal was found by Cheapflights users on 7/1. 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 7/257:05 am
ONT
- JAX
1 stop7h 59m
Delta
Deal found 7/1![Delta logo]()
$210
This United Airlines deal was found by Cheapflights users on 6/29. 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 8/187:00 am
ONT
- JAX
1 stop9h 25m
United Airlines
Deal found 6/29![United Airlines logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 7/233:40 pm
ONT
- JAX
2 stops22h 54m
Frontier
Deal found 7/1![Frontier logo]()
$223
This United Airlines deal was found by Cheapflights users on 6/29. 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 8/197:00 am
ONT
- JAX
1 stop9h 25m
United Airlines
Deal found 6/29![United Airlines logo]()
$235
This Southwest deal was found by Cheapflights users on 7/3. 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 8/29:40 pm
ONT
- JAX
1 stop9h 40m
Southwest
Deal found 7/3![Southwest logo]()
$239
This Kiwi.com deal was found by Cheapflights users on 7/2. 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 7/179:32 am
ONT
- JAX
2 stops29h 02m
Frontier
Deal found 7/2![Frontier logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 7/153:40 pm
ONT
- JAX
2 stops22h 54m
Frontier
Deal found 7/1![Frontier logo]()
$246
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 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $323 (American Airlines) |
One-way from | $148 (Kiwi.com) |
Popular in | December |
Cheapest in | January |
Average price | $562 |
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 4, 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
Sat 8/15
7:05 am-6:00 pm
2 stops7h 55m
Jacksonville
Sat 8/22
1:30 pm-8:05 pm
2 stops9h 35m
$369
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Mon 8/31
11:00 am-9:45 pm
1 stop7h 45m
Jacksonville
Fri 9/4
4:50 pm-10:10 pm
1 stop8h 20m
$418
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Wed 8/12
5:45 am-5:55 pm
2 stops9h 10m
Jacksonville
Sun 8/16
1:45 pm-7:35 pm
2 stops8h 50m
$428
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Tue 9/1
7:00 am-7:25 pm
1 stop9h 25m
Jacksonville
Wed 9/2
4:45 pm-10:35 pm
1 stop8h 50m
$469
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Fri 8/14
7:00 am-7:25 pm
1 stop9h 25m
Jacksonville
Fri 8/21
3:07 pm-8:53 pm
1 stop8h 46m
$477
Quickest round-trip
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Fri 8/14
6:20 am-4:15 pm
1 stop6h 55m
Jacksonville
Sun 8/16
1:45 pm-7:35 pm
2 stops8h 50m
$482
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Wed 12/23
11:59 pm-11:59 am
2 stops9h 00m
Jacksonville
Fri 1/1
3:45 pm-8:58 pm
1 stop8h 13m
$500
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Mon 7/27
8:00 am-9:40 pm
2 stops10h 40m
Jacksonville
Mon 8/3
6:20 am-12:10 pm
2 stops8h 50m
$517
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Fri 11/13
6:46 am-5:57 pm
1 stop8h 11m
Jacksonville
Mon 11/16
3:39 pm-9:50 pm
1 stop9h 11m
$528
Cheapest one-way
Quickest one-way
OntarioJacksonville
ONT - JAX
ONTJAX
Ontario
Tue 9/1
12:00 pm-9:43 pm
1 stop6h 43m
$180
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 4, 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.
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
7.9
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
7.9
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
7.9
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
7.9
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
7.9
Crew
8.6
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 4, 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$347 | Average$517 | FlexibilityNo cancel fee | On-time63% |