JAX - ONT

$91 Find Cheap Flights from Jacksonville to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Jacksonville to Ontario departing on 3/2. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Jacksonville to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Jacksonville to Ontario, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$319
Overall average: $483
Multiple Airlines
mer. 3/4dim. 3/8
JAX - ONT • 1 stop
Cheapest one-way
$91
Typical prices: $308-$453
Frontier
lun. 3/2
JAX - ONT • 2 stops
Top airlines
Southwest
Cheapest • from $367 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
October
Cheapest • 26% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Jacksonville to Ontario (JAX-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Jacksonville to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Jacksonville to Ontario

mer., mars 4 - dim., mars 8
Multiple Airlines Logo
9:39 am - 6:22 pm
JAX
-
ONT
11h 43m
1 stop
Multiple Airlines Logo
6:15 am - 7:33 pm
ONT
-
JAX
34h 18m
2 stops
$319Multiple Airlines
ven., févr. 13 - mar., févr. 17
Multiple Airlines Logo
8:12 pm - 11:59 pm
JAX
-
ONT
30h 47m
2 stops
Multiple Airlines Logo
2:06 pm - 7:59 pm
ONT
-
JAX
26h 53m
1 stop
$322Multiple Airlines
mer., mars 18 - mar., mars 24
Multiple Airlines Logo
8:18 pm - 11:59 pm
JAX
-
ONT
30h 41m
2 stops
Multiple Airlines Logo
2:23 pm - 7:59 pm
ONT
-
JAX
26h 36m
1 stop
$354Multiple Airlines
mar., mars 3 - mer., mars 4
Southwest Logo
5:50 am - 10:20 am
JAX
-
ONT
7h 30m
1 stop
Southwest Logo
6:50 am - 4:50 pm
ONT
-
JAX
7h 00m
1 stop
$367Southwest
mar., mars 3 - mer., mars 4
United Airlines Logo
5:31 pm - 10:00 pm
JAX
-
ONT
7h 29m
1 stop
United Airlines Logo
5:00 am - 9:32 pm
ONT
-
JAX
13h 32m
2 stops
$372United Airlines
mar., mars 3 - mer., mars 4
Southwest Logo
5:50 am - 12:25 pm
JAX
-
ONT
9h 35m
2 stops
Southwest Logo
5:55 am - 6:10 pm
ONT
-
JAX
9h 15m
2 stops
$377Southwest
mar., avr. 14 - mar., avr. 21
Delta Logo
3:57 pm - 9:00 pm
JAX
-
ONT
8h 03m
1 stop
Delta Logo
10:15 pm - 8:47 am
ONT
-
JAX
7h 32m
1 stop
$385Delta
mer., avr. 15 - dim., avr. 19
United Airlines Logo
5:27 pm - 9:50 pm
JAX
-
ONT
7h 23m
1 stop
United Airlines Logo
7:00 am - 7:34 pm
ONT
-
JAX
9h 34m
1 stop
$398United Airlines
mer., mars 4 - dim., mars 8
United Airlines Logo
5:31 pm - 9:59 pm
JAX
-
ONT
7h 28m
1 stop
United Airlines Logo
5:15 am - 3:17 pm
ONT
-
JAX
7h 02m
1 stop
$402United Airlines
mer., avr. 15 - dim., avr. 19
United Airlines Logo
8:15 am - 5:47 pm
JAX
-
ONT
12h 32m
2 stops
United Airlines Logo
7:00 am - 7:34 pm
ONT
-
JAX
9h 34m
1 stop
$403United Airlines
Booking Insights

KAYAK's insights & trends for Jacksonville to Ontario flights

Get data-powered insights and trends into flights from Jacksonville to Ontario to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Jacksonville to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Jacksonville to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Jacksonville to Ontario is October, where tickets cost $344 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is $722 and $718 respectively.

Good to know

Low seasonOctober
Cheapest flight$91
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly and prices are also 16% lower on average.
Flight from Jacksonville to Ontario

When to book flights from Jacksonville to Ontario

Are your dates flexible? Find out the best times to travel from Jacksonville to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Jacksonville to Ontario

  • What is the cheapest flight from Jacksonville to Ontario?

    In the last 3 days, the lowest price for a flight from Jacksonville to Ontario was $91 for a one-way ticket and $319 for a round-trip.

  • Do I need a passport to fly between Jacksonville and Ontario?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from Jacksonville to Ontario?

    When flying out of Jacksonville you will be using Jacksonville. You will be landing at Ontario, also known as Ontario.

  • Which aircraft models fly most regularly from Jacksonville to Ontario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Jacksonville to Ontario?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Jacksonville and Ontario, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Jacksonville to Ontario, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Jacksonville to Ontario are Southwest and Delta. With an average price for the route of $416 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $516 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Jacksonville to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Jacksonville to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Jacksonville to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Jacksonville is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Jacksonville to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Jacksonville with another airline. Booking your flights between Jacksonville and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Jacksonville to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Jacksonville up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Jacksonville to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Jacksonville to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Jacksonville to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4271 reviews
7.5Entertainment
8.0Comfort
7.0Food
8.1Boarding
8.6Crew
Airline reviews

3 hour delay. Had to change plans and was still delayed.

2.0 MediocreAnonymous, Jan 2026
SFO - SAN
Read more Southwest reviews

3 hour delay. Had to change plans and was still delayed.

Departure was delayed more than 1/2 hour while we waited for luggage (only) transfer from another flight/plane. Once approved for takeoff, the flight was excellent.

The flight crew was extremely rude and especially not helpful when our flight was delayed.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Delays delays delays. Late taking off, late landing, wait for a gate, etc.

Connecting flight is on time and boarding was a breeze!

I usually get upgraded so my experience is usually amazing. I did not get upgraded this time - which was fine - but the wifi had issues, the monitors were going in & out, & (though not Delta's fault) one of the gentlemen next to me desperately needed a shower.

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

The food is terrible. The staff is wonderful. Comfort is good.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

The crew took good care of us. The flight from ATL to SFO is a longer one, and there were multiple beverage offerings. I like the 757's that Delta uses. Good airplane that is comfortable. I do wish Delta would separate Priority boarding from the better seats. I would gladly take a smaller seat in an open row than be jammed into Comfort just to get priority boarding, just to make sure I don't have to check a bag.

Gate agent rushed to fill hot jetway with crowd so it took over 12 minutes to go from gate to plane. Just like a discount airline Pooly prepared cabin and third time that claim of rough air prevented any cabin service. Friends on a Southwest flight at similar time had service.

I was uncomfortably cold on the plane. Other than that it was uneventful and therefore as enjoyable as a plane ride can be.

Food was surprisingly good but the WiFi was not great

the whole trip was smooth, and as comfortable as flying is these days. flight crew was friendly and very courteous and helpful.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

Teeny tiny bathrooms, crew was not realistic about when we'd arrive.

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

Flight was late - I was downgraded from first class to coach

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Plane boarded early a quickly, was mostly full. We left close to on time. And landed early.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Amazing I love American. I’ll never fly anyone else if I can help it.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

After the door had been closed, the cockpit makes an announcement that catering is running late and it is not the airline's fault. It is their fault in the sense that we had to sit for 2 hours or more when we could have stayed in the terminal. Poor communications between catering and airline. This caused a young man to lose his temper and he went storming out hitting objects. He had complained to the gate agent that he had already waited at the gate 7 hours and when can the airplane leave? Airilnes do a poor job of explaining delays, maintenance issues, etc. whereas being truthful may gain more sympathy or understanding.

We were told the flight was delayed 5 times, then it was moved to the next day.

The experience with American Airlines was good, although the Philippines Airlines flight was much better (better seats, better food, better entertainment options, overall better). Again, the MIA to LAX flight was fine, but nothing in comparison to the comfort and accommodations of the Philippines Airlines flight from LAX to MNL.

Loved the crew . Absolutely no complaints. Except for luggage lost

Wish some foods provided rather than just biscuit/cookie for flight more than 2 hours

We are too tired and frustrated to comment politely at this point

The flight crew was rude. We were in first class and no one even offered water until an hour after we were in the air. Horrible experience

Great. Quick and quiet and east. The breakfast choices were a welcome surprise!

Everything you need to know for your flight from Jacksonville to Ontario

Information on your arrival and departure airports