What is the cheapest airline that flies from Ontario to Jacksonville?

Frontier, Delta, and United Airlines are the most popular carriers operating from Ontario to Jacksonville

What airlines fly to Jacksonville?

American Airlines, Delta and Southwest are the top three most popular airlines that fly to Jacksonville from Ontario according to our data. American Airlines is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Jacksonville. Keep in mind that there are 6 different airlines that fly to Jacksonville on a routine basis, so you have a few additional options to choose from.

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?

There are 4 operators available for flights from Ontario Airport to Jacksonville Airport as of September 2026.

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.

$136 Cheap Flights from Ontario to Jacksonville in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Jacksonville

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:15 am - 5:25 pmONT Ontario-JAX Jacksonville

32h 10m2 stops Denver Intl Atlanta Hartsfield-Jackson

7:46 pm - 10:35 amJAX Jacksonville-ONT Ontario

17h 49m2 stops Atlanta Hartsfield-Jackson Denver Intl

$281Frontier

Wed, Oct 21 - Mon, Oct 26

11:52 am - 5:25 pmONT Ontario-JAX Jacksonville

26h 33m2 stops Denver Intl Atlanta Hartsfield-Jackson

7:03 pm - 11:51 pmJAX Jacksonville-ONT Ontario

31h 48m2 stops Atlanta Hartsfield-Jackson Denver Intl

$281Frontier

Wed, Oct 21 - Tue, Oct 27

1:05 pm - 10:51 pmONT Ontario-JAX Jacksonville

6h 46m1 stop Phoenix Sky Harbor Intl

2:41 pm - 10:12 pmJAX Jacksonville-ONT Ontario

10h 31m1 stop Charlotte Douglas

$377American Airlines

Thu, Oct 29 - Mon, Nov 2

12:43 pm - 10:29 pmONT Ontario-JAX Jacksonville

6h 46m1 stop Dallas/Fort Worth

6:16 am - 11:53 amJAX Jacksonville-ONT Ontario

8h 37m1 stop Dallas/Fort Worth

$377American Airlines

Tue, Oct 6 - Tue, Oct 13

10:55 am - 10:10 pmONT Ontario-JAX Jacksonville

8h 15m1 stop Chicago Midway

8:45 am - 2:40 pmJAX Jacksonville-ONT Ontario

8h 55m1 stop Denver Intl

$377Southwest

Wed, Dec 2 - Wed, Dec 9

2:40 pm - 11:45 pmONT Ontario-JAX Jacksonville

6h 05m1 stop Houston Hobby

5:30 am - 11:50 amJAX Jacksonville-ONT Ontario

9h 20m1 stop Denver Intl

$377Southwest

Thu, Oct 29 - Sat, Oct 31

7:05 am - 4:29 pmONT Ontario-JAX Jacksonville

6h 24m1 stop Atlanta Hartsfield-Jackson

2:32 pm - 6:41 pmJAX Jacksonville-ONT Ontario

7h 09m1 stop Atlanta Hartsfield-Jackson

$377Delta

Wed, Sep 30 - Sat, Oct 3

11:10 pm - 8:38 amONT Ontario-JAX Jacksonville

6h 28m1 stop Atlanta Hartsfield-Jackson

5:05 am - 11:08 amJAX Jacksonville-ONT Ontario

9h 03m1 stop Atlanta Hartsfield-Jackson

$377Delta

Thu, Nov 12 - Tue, Nov 17

5:00 am - 6:08 pmONT Ontario-JAX Jacksonville

10h 08m2 stops Denver Intl Chicago O'Hare Intl

5:29 pm - 9:59 pmJAX Jacksonville-ONT Ontario

7h 30m1 stop Houston George Bush Intcntl

$416United Airlines

Fri, Dec 4 - Fri, Dec 11

5:00 am - 3:01 pmONT Ontario-JAX Jacksonville

7h 01m1 stop Denver Intl

3:44 pm - 9:40 pmJAX Jacksonville-ONT Ontario

8h 56m1 stop Houston George Bush Intcntl

$431United Airlines

Tue, Nov 10 - Sat, Nov 14

Cheap last minute flights

Enter your travel dates to find the best prices.

12:37 pm - 10:22 pmONT Ontario-JAX Jacksonville

6h 45m1 stop Dallas/Fort Worth

5:16 pm - 10:37 pmJAX Jacksonville-ONT Ontario

8h 21m1 stop Dallas/Fort Worth

$594American Airlines

Tue, Sep 15 - Mon, Sep 28

7:45 am - 7:45 pmONT Ontario-JAX Jacksonville

9h 00m2 stops Las Vegas Harry Reid Intl Nashville Intl

5:50 am - 9:15 amJAX Jacksonville-ONT Ontario

6h 25m1 stop Houston Hobby

$599Southwest

Tue, Sep 15 - Mon, Sep 28

8:35 am - 7:45 pmONT Ontario-JAX Jacksonville

8h 10m2 stops Phoenix Sky Harbor Intl Nashville Intl

4:30 pm - 9:50 pmJAX Jacksonville-ONT Ontario

8h 20m2 stops Austin Bergstrom Las Vegas Harry Reid Intl

$604Southwest

Tue, Sep 15 - Mon, Sep 28

12:37 pm - 10:22 pmONT Ontario-JAX Jacksonville

6h 45m1 stop Dallas/Fort Worth

5:16 pm - 10:37 pmJAX Jacksonville-ONT Ontario

8h 21m1 stop Dallas/Fort Worth

$614American Airlines

Tue, Sep 15 - Mon, Sep 28

10:00 pm - 10:08 amONT Ontario-JAX Jacksonville

9h 08m1 stop Atlanta Hartsfield-Jackson

5:34 pm - 10:24 pmJAX Jacksonville-ONT Ontario

7h 50m1 stop Atlanta Hartsfield-Jackson

$741Delta

Mon, Sep 14 - Thu, Sep 17

12:17 pm - 11:58 pmONT Ontario-JAX Jacksonville

8h 41m1 stop Atlanta Hartsfield-Jackson

6:59 pm - 10:24 pmJAX Jacksonville-ONT Ontario

6h 25m1 stop Atlanta Hartsfield-Jackson

$765Delta

Wed, Sep 16 - Fri, Sep 18

5:00 am - 3:33 pmONT Ontario-JAX Jacksonville

7h 33m1 stop Denver Intl

4:45 pm - 10:59 pmJAX Jacksonville-ONT Ontario

9h 14m1 stop Chicago O'Hare Intl

$771United Airlines

Sun, Sep 13 - Tue, Sep 15

5:00 am - 3:33 pmONT Ontario-JAX Jacksonville

7h 33m1 stop Denver Intl

8:15 am - 12:50 pmJAX Jacksonville-ONT Ontario

7h 35m1 stop Denver Intl

$771United Airlines

Sun, Sep 13 - Tue, Sep 15

10:39 pm - 2:32 pmONT Ontario-JAX Jacksonville

12h 53m1 stop New York John F Kennedy Intl

11:00 am - 8:27 pmJAX Jacksonville-ONT Ontario

12h 27m1 stop New York John F Kennedy Intl

$1,523JetBlue

Fri, Sep 18 - Sun, Sep 20

6:02 am - 10:40 pmONT Ontario-JAX Jacksonville

13h 38m2 stops Seattle/Tacoma Intl Chicago O'Hare Intl

9:06 am - 8:24 pmJAX Jacksonville-ONT Ontario

14h 18m2 stops Dallas/Fort Worth Portland

$3,898Alaska Airlines

Mon, Sep 14 - Thu, Sep 17

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Frontier flights from Ontario to Jacksonville

Our best Frontier deals on Ontario to Jacksonville flight tickets

Frontier

Oct 21

ONT6:15 amOntario

32h 10m

2 stops

JAX5:25 pmJacksonville

Oct 26

JAX7:46 pmJacksonville

17h 49m

2 stops

ONT10:35 amOntario

$281

Frontier

Oct 28

ONT6:25 amOntario

32h 43m

2 stops

JAX6:08 pmJacksonville

Nov 1

JAX7:03 pmJacksonville

18h 32m

2 stops

ONT10:35 amOntario

$316

Frontier

Oct 7

ONT11:45 amOntario

26h 40m

2 stops

JAX5:25 pmJacksonville

Oct 12

JAX7:46 pmJacksonville

41h 43m

2 stops

ONT10:29 amOntario

$326

United Airlines flights from Ontario to Jacksonville

Our best United Airlines deals on Ontario to Jacksonville flight tickets

United Airlines

Sep 24

ONT5:00 amOntario

7h 42m

1 stop

JAX3:42 pmJacksonville

Sep 27

JAX8:05 amJacksonville

7h 41m

1 stop

ONT12:46 pmOntario

$607

United Airlines

Sep 24

ONT5:00 amOntario

7h 42m

1 stop

JAX3:42 pmJacksonville

Sep 29

JAX4:58 pmJacksonville

8h 51m

1 stop

ONT10:49 pmOntario

$704

United Airlines

Sep 24

ONT5:00 amOntario

7h 42m

1 stop

JAX3:42 pmJacksonville

Sep 29

JAX9:25 amJacksonville

11h 16m

2 stops

ONT5:41 pmOntario

$709

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Wed 10/21

6:15 am-5:25 pm

2 stops32h 10m

Jacksonville

Mon 10/26

7:46 pm-10:35 am

2 stops17h 49m

$281

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Wed 10/21

11:52 am-5:25 pm

2 stops26h 33m

Jacksonville

Tue 10/27

7:03 pm-11:51 pm

2 stops31h 48m

$281

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Thu 10/29

1:05 pm-10:51 pm

1 stop6h 46m

Jacksonville

Mon 11/2

2:41 pm-10:12 pm

1 stop10h 31m

$377

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Tue 10/6

12:43 pm-10:29 pm

1 stop6h 46m

Jacksonville

Tue 10/13

6:16 am-11:53 am

1 stop8h 37m

$377

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Wed 12/2

10:55 am-10:10 pm

1 stop8h 15m

Jacksonville

Wed 12/9

8:45 am-2:40 pm

1 stop8h 55m

$377

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Thu 10/29

2:40 pm-11:45 pm

1 stop6h 05m

Jacksonville

Sat 10/31

5:30 am-11:50 am

1 stop9h 20m

$377

Quickest round-trip

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Wed 9/30

7:05 am-4:29 pm

1 stop6h 24m

Jacksonville

Sat 10/3

2:32 pm-6:41 pm

1 stop7h 09m

$377

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Thu 11/12

11:10 pm-8:38 am

1 stop6h 28m

Jacksonville

Tue 11/17

5:05 am-11:08 am

1 stop9h 03m

$377

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Fri 12/4

5:00 am-6:08 pm

2 stops10h 08m

Jacksonville

Fri 12/11

5:29 pm-9:59 pm

1 stop7h 30m

$416

OntarioJacksonville

ONT Ontario - JAX Jacksonville

ONTJAX

Ontario

Tue 11/10

5:00 am-3:01 pm

1 stop7h 01m

Jacksonville

Sat 11/14

3:44 pm-9:40 pm

1 stop8h 56m

$431

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

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 $288. 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 $508.

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 $322 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 September 2026, prices for Ontario to Jacksonville flights are approximately 28% more expensive 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	$136
Fastest flight time	6h 38m
Direct flights	None

The best one-way flight to Jacksonville from Ontario in the past 72 hours is $136. The best round-trip flight deal from Ontario to Jacksonville found on momondo in the last 72 hours is $281.

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.

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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?
There are 4 operators available for flights from Ontario Airport to Jacksonville Airport as of September 2026.
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?
Based on momondo bookings for flights between Ontario and Jacksonville, the leading airline is American Airlines, making up 47% of the total bookings. Other popular airlines include Southwest with 28%, United Airlines with 13%, and Delta with 12%.

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
Delta	PriceFrom $302	Free Cancellation	Rating 7.8 8,566 reviews	Search Delta flights
United Airlines	PriceFrom $330	Free Cancellation	Rating 7.4 10,214 reviews	Search United Airlines flights
American Airlines	PriceFrom $342	Free Cancellation	Rating 7.1 12,049 reviews	Search American Airlines flights
Southwest	PriceFrom $374	Free Cancellation	Rating 8.0 4,191 reviews	Search Southwest flights

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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.

An easier way to manage your Jacksonville trip

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Cheap flights from Ontario to Jacksonville from $136

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Jacksonville departing on 11/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Frontier flights from Ontario to Jacksonville

Our best Frontier deals on Ontario to Jacksonville flight tickets

United Airlines flights from Ontario to Jacksonville

Our best United Airlines deals on Ontario to Jacksonville flight tickets

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How to get the cheapest flight ticket from Ontario to Jacksonville

What is the cheapest month to fly to Jacksonville?

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

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

How have Ontario to Jacksonville flight prices changed over time?

What is the cheapest airline that flies from Ontario to Jacksonville?

What airlines fly to Jacksonville?

When to book flights from Ontario to Jacksonville

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying 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

Traveling to a place near Jacksonville?

Why use momondo?

An easier way to manage your Jacksonville trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Florida

Fly your favorite airline to Jacksonville

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Jacksonville

List of cabin classes available on flights landing in Jacksonville. Availability may vary depending on flight origin and airline.

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