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Cheap flights from Ontario to Jacksonville from $121

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Jacksonville

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
2:00 pm - 2:20 pmONT  Ontario-JAX Jacksonville
21h 20m2 stops Las Vegas Harry Reid Intl Atlanta Hartsfield-Jackson
Frontier Logo
3:39 pm - 6:31 pmJAX  Jacksonville-ONT Ontario
29h 52m2 stops Atlanta Hartsfield-Jackson Las Vegas Harry Reid Intl
$245Frontier
Fri, Dec 4 - Wed, Dec 9
Multiple Airlines Logo
2:00 pm - 8:02 pmONT  Ontario-JAX Jacksonville
27h 02m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
3:39 pm - 11:51 amJAX  Jacksonville-ONT Ontario
23h 12m2 stops Atlanta Hartsfield-Jackson Las Vegas Harry Reid Intl
$274Multiple Airlines
Fri, Dec 4 - Wed, Dec 9
United Airlines Logo
6:00 am - 4:23 pmONT  Ontario-JAX Jacksonville
7h 23m1 stop Houston George Bush Intcntl
United Airlines Logo
5:29 pm - 9:40 pmJAX  Jacksonville-ONT Ontario
7h 11m1 stop Houston George Bush Intcntl
$279United Airlines
Wed, Nov 18 - Wed, Nov 25
United Airlines Logo
5:00 am - 3:17 pmONT  Ontario-JAX Jacksonville
7h 17m1 stop Denver Intl
United Airlines Logo
4:25 pm - 9:11 pmJAX  Jacksonville-ONT Ontario
7h 46m1 stop Denver Intl
$279United Airlines
Sat, Dec 5 - Tue, Dec 8
Southwest Logo
6:10 am - 5:50 pmONT  Ontario-JAX Jacksonville
8h 40m1 stop Austin Bergstrom
Southwest Logo
6:35 am - 12:10 pmJAX  Jacksonville-ONT Ontario
8h 35m2 stops Nashville Intl Phoenix Sky Harbor Intl
$284Southwest
Sat, Dec 5 - Tue, Dec 8
Southwest Logo
5:50 am - 5:45 pmONT  Ontario-JAX Jacksonville
8h 55m2 stops Las Vegas Harry Reid Intl Dallas Love Field
Southwest Logo
6:35 am - 12:10 pmJAX  Jacksonville-ONT Ontario
8h 35m2 stops Nashville Intl Phoenix Sky Harbor Intl
$289Southwest
Sat, Dec 5 - Tue, Dec 8
Delta Logo
11:08 pm - 10:13 amONT  Ontario-JAX Jacksonville
8h 05m1 stop Atlanta Hartsfield-Jackson
Delta Logo
7:00 am - 11:07 amJAX  Jacksonville-ONT Ontario
7h 07m1 stop Atlanta Hartsfield-Jackson
$317Delta
Fri, Dec 4 - Tue, Dec 8
American Airlines Logo
10:34 am - 10:36 pmONT  Ontario-JAX Jacksonville
9h 02m1 stop Dallas/Fort Worth
American Airlines Logo
7:44 pm - 11:59 pmJAX  Jacksonville-ONT Ontario
7h 15m1 stop Dallas/Fort Worth
$336American Airlines
Thu, Dec 17 - Thu, Dec 24
Delta Logo
12:00 pm - 9:38 pmONT  Ontario-JAX Jacksonville
6h 38m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:30 am - 11:27 amJAX  Jacksonville-ONT Ontario
7h 57m1 stop Atlanta Hartsfield-Jackson
$336Delta
Thu, Jan 28 - Sun, Jan 31
American Airlines Logo
11:59 pm - 10:57 amONT  Ontario-JAX Jacksonville
7h 58m1 stop Dallas/Fort Worth
American Airlines Logo
5:08 pm - 10:12 pmJAX  Jacksonville-ONT Ontario
8h 04m1 stop Charlotte Douglas
$403American Airlines
Mon, Nov 9 - Mon, Nov 16

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Delta flights from Ontario to Jacksonville

Our best Delta deals on Ontario to Jacksonville flight tickets
Delta
Dec 24
ONT11:10 amOntario
8h 45m
1 stop
JAX10:55 pmJacksonville
Dec 25
JAX6:00 amJacksonville
7h 00m
1 stop
ONT10:00 amOntario
$337
Delta
Dec 19
ONT10:35 pmOntario
7h 10m
1 stop
JAX8:45 amJacksonville
Dec 24
JAX6:00 amJacksonville
7h 00m
1 stop
ONT10:00 amOntario
$369
Delta
Dec 19
ONT10:35 pmOntario
7h 10m
1 stop
JAX8:45 amJacksonville
Dec 25
JAX6:00 amJacksonville
7h 00m
1 stop
ONT10:00 amOntario
$387

United Airlines flights from Ontario to Jacksonville

Our best United Airlines deals on Ontario to Jacksonville flight tickets
United Airlines
Nov 18
ONT6:00 amOntario
7h 23m
1 stop
JAX4:23 pmJacksonville
Nov 25
JAX9:20 amJacksonville
13h 30m
2 stops
ONT7:50 pmOntario
$370
United Airlines
Nov 19
ONT6:00 amOntario
7h 23m
1 stop
JAX4:23 pmJacksonville
Dec 13
JAX4:25 pmJacksonville
7h 46m
1 stop
ONT9:11 pmOntario
$374
United Airlines
Nov 19
ONT6:00 amOntario
7h 23m
1 stop
JAX4:23 pmJacksonville
Dec 14
JAX5:25 pmJacksonville
7h 34m
1 stop
ONT9:59 pmOntario
$407

momondo Fare Finder

 
Use the filters below to find and compare flights from Ontario to Jacksonville that are best for you.

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Route

Depart

Return

Price

Cheapest round-trip

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Fri 12/4

2:00 pm-2:20 pm

2 stops21h 20m

Jacksonville

Wed 12/9

3:39 pm-6:31 pm

2 stops29h 52m

$245

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Fri 12/4

2:00 pm-8:02 pm

1 stop27h 02m

Jacksonville

Wed 12/9

3:39 pm-11:51 am

2 stops23h 12m

$274
Quickest round-trip

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Wed 11/18

6:00 am-4:23 pm

1 stop7h 23m

Jacksonville

Wed 11/25

5:29 pm-9:40 pm

1 stop7h 11m

$279

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Sat 12/5

5:00 am-3:17 pm

1 stop7h 17m

Jacksonville

Tue 12/8

4:25 pm-9:11 pm

1 stop7h 46m

$279

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Sat 12/5

6:10 am-5:50 pm

1 stop8h 40m

Jacksonville

Tue 12/8

6:35 am-12:10 pm

2 stops8h 35m

$284

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Sat 12/5

5:50 am-5:45 pm

2 stops8h 55m

Jacksonville

Tue 12/8

6:35 am-12:10 pm

2 stops8h 35m

$289

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Fri 12/4

11:08 pm-10:13 am

1 stop8h 05m

Jacksonville

Tue 12/8

7:00 am-11:07 am

1 stop7h 07m

$317

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Thu 12/17

10:34 am-10:36 pm

1 stop9h 02m

Jacksonville

Thu 12/24

7:44 pm-11:59 pm

1 stop7h 15m

$336

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Thu 1/28

12:00 pm-9:38 pm

1 stop6h 38m

Jacksonville

Sun 1/31

6:30 am-11:27 am

1 stop7h 57m

$336

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Mon 11/9

11:59 pm-10:57 am

1 stop7h 58m

Jacksonville

Mon 11/16

5:08 pm-10:12 pm

1 stop8h 04m

$403

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Jacksonville from

How to get the cheapest flight ticket from Ontario to Jacksonville

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Ontario and Jacksonville?

Prices are currently low for flights on this route.

Typical prices usually range from $406 to $570.
The lowest price recently found on this route was $245.

What is the cheapest month to fly to Jacksonville?

If you are unable to visit Jacksonville during the month of January, then departing from Ontario during the month June is also very affordable. Most momondo users find prices during this month for around $372.

What is the cheapest day to depart on your flight to Jacksonville?

According to our data, Friday is the cheapest day to fly to Jacksonville from Ontario. The lowest ticket price found for a Friday departure recently was $303. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. On the other hand, Monday is the most expensive day to depart from Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $517.

What is the cheapest time of day to depart on your flight to Jacksonville?

Flying to Jacksonville from Ontario at noon is the least expensive time of day to depart. momondo users have found prices as low as $327 when looking at flights departing at noon. Flights to Jacksonville are more costly in the morning, with an average ticket price of $367. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

How have Ontario to Jacksonville flight prices changed over time?

As of October 2026, prices for Ontario to Jacksonville flights are approximately 29% cheaper when compared to flights at the same time last year.

When to book flights from Ontario to Jacksonville

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Jacksonville according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Jacksonville (ONT to JAX) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Jacksonville

Best Price Found

$121

Fastest flight time

6h 38m

Direct flights

None
The best one-way flight to Jacksonville from Ontario in the past 72 hours is $121. The best round-trip flight deal from Ontario to Jacksonville found on momondo in the last 72 hours is $245.
The fastest flight from Ontario to Jacksonville takes 6h 38m
There are no direct flights from Ontario to Jacksonville. There are no popular flight routes from Ontario to Jacksonville.
Search flight deals

Frequently asked questions about flying from Ontario to Jacksonville

  • How far is Ontario to Jacksonville by plane?

    The distance between Ontario and Jacksonville is about 2108.0 mi. By plane, this route typically takes 6h 38m.

  • When did momondo last update prices for flights from Ontario Airport to Jacksonville Airport?

    Prices for flights from Ontario Airport to Jacksonville Airport were last updated today.

  • How many operators does momondo search for flights from Ontario Airport to Jacksonville Airport?

  • How old do you have to be to fly from Ontario Airport to Jacksonville Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Jacksonville Airport.

  • What documentation or ID do you need to fly to Jacksonville Airport?

    The travel and health documents required for your trip to Jacksonville Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Jacksonville Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Ontario to Jacksonville?

Best airlines flying from Ontario to Jacksonville

Compare and see reviews for airlines that fly from Ontario to Jacksonville with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $330Free CancellationRating
7.3
10,436 reviews
Search United Airlines flights
American AirlinesPriceFrom $342Free CancellationRating
7.0
12,191 reviews
Search American Airlines flights
DeltaPriceFrom $342Free CancellationRating
7.8
8,681 reviews
Search Delta flights
SouthwestPriceFrom $376Free CancellationRating
7.9
4,224 reviews
Search Southwest flights

Traveling to a place near Jacksonville?

Book flights to Jacksonville if you plan to visit one of these locations
Fernandina Beach
Jacksonville Beach
Orange Park
Kingsland
Waycross
Ponte Vedra Beach
Atlantic Beach
St Johns
Yulee
Neptune Beach
Cumberland Island

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Jacksonville?

It is quick and easy to find Ontario to Jacksonville flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Jacksonville that suits you.

Can I find flights from Ontario to Jacksonville with flexible booking policies on momondo?

Flights from Ontario to Jacksonville with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to Jacksonville?

momondo helps you find the best flight between Ontario and Jacksonville by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Ontario to Jacksonville right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Jacksonville, momondo offers a useful price alert feature which will track prices for flights to Jacksonville from Ontario and alert you when they change.

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