ONT - JAX

$106 Find Cheap Flights from Ontario to Jacksonville

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Jacksonville departing on 4/28. 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 Jacksonville

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

Cheapest round-trip
$311
Overall average: $549
Delta
Tue 3/17Tue 3/24
ONT - JAX • 1 stop
Cheapest one-way
$106
Typical prices: $343-$389
Frontier
Tue 4/28
ONT - JAX • 2 stops
Top airlines
Delta
Cheapest • from $311 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 47% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 20% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Jacksonville!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Jacksonville (ONT-JAX)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Jacksonville 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 Ontario to Jacksonville

Tue, Mar 17 - Tue, Mar 24
Delta Logo
10:25 pm - 10:18 am
ONT
-
JAX
8h 53m
1 stop
Delta Logo
5:30 am - 11:47 am
JAX
-
ONT
9h 17m
1 stop
$311Delta
Wed, Mar 11 - Wed, Mar 18
American Airlines Logo
7:59 pm - 8:51 am
ONT
-
JAX
9h 52m
2 stops
American Airlines Logo
3:55 pm - 9:24 pm
JAX
-
ONT
8h 29m
1 stop
$316American Airlines
Wed, Mar 11 - Wed, Mar 18
American Airlines Logo
7:59 pm - 8:51 am
ONT
-
JAX
9h 52m
2 stops
American Airlines Logo
3:55 pm - 11:59 pm
JAX
-
ONT
11h 04m
2 stops
$321American Airlines
Tue, Mar 24 - Tue, Apr 7
Delta Logo
10:25 pm - 10:18 am
ONT
-
JAX
8h 53m
1 stop
Delta Logo
5:30 am - 12:23 pm
JAX
-
ONT
9h 53m
2 stops
$326Delta
Tue, May 5 - Sat, May 9
United Airlines Logo
7:00 am - 7:44 pm
ONT
-
JAX
9h 44m
1 stop
United Airlines Logo
5:25 pm - 9:58 pm
JAX
-
ONT
7h 33m
1 stop
$327United Airlines
Wed, Apr 15 - Sat, Apr 25
American Airlines Logo
12:19 pm - 10:44 pm
ONT
-
JAX
7h 25m
1 stop
American Airlines Logo
7:49 pm - 11:46 pm
JAX
-
ONT
6h 57m
1 stop
$332American Airlines
Sat, May 16 - Tue, May 19
United Airlines Logo
5:00 am - 8:02 pm
ONT
-
JAX
12h 02m
2 stops
United Airlines Logo
5:25 pm - 9:58 pm
JAX
-
ONT
7h 33m
1 stop
$333United Airlines
Wed, Apr 15 - Sat, Apr 25
American Airlines Logo
12:19 pm - 10:44 pm
ONT
-
JAX
7h 25m
1 stop
American Airlines Logo
8:54 am - 4:22 pm
JAX
-
ONT
10h 28m
2 stops
$337American Airlines
Tue, Mar 24 - Sat, Apr 11
Delta Logo
10:25 pm - 10:18 am
ONT
-
JAX
8h 53m
1 stop
Delta Logo
5:30 am - 11:47 am
JAX
-
ONT
9h 17m
1 stop
$342Delta
Tue, Mar 17 - Wed, Mar 25
American Airlines Logo
7:59 pm - 8:51 am
ONT
-
JAX
9h 52m
2 stops
American Airlines Logo
3:55 pm - 11:59 pm
JAX
-
ONT
11h 04m
2 stops
$345American Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Jacksonville flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Jacksonville, 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 Ontario to Jacksonville is January, where tickets cost $368 (return) on average. On the other hand, the most expensive months are November and March, where the average cost of round-trip tickets is $562 and $549 respectively.

How far in advance should I book a flight from Ontario to Jacksonville?

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

To get a below average price on the flight from Ontario to Jacksonville, you should book around 4 weeks before departure, which saves you about 47% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know

Low seasonDecember
Cheapest flight$106
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly with an average 18% increase in price.
Flight from Ontario to Jacksonville

When to book flights from Ontario to Jacksonville

Are your dates flexible? Find out the best times to travel from Ontario to Jacksonville 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 Ontario to Jacksonville

  • What is the cheapest flight from Ontario to Jacksonville?

    In the last 3 days, the lowest price for a flight from Ontario to Jacksonville was $106 for a one-way ticket and $311 for a round-trip.

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

    No, a passport isn't needed to fly from Ontario to Jacksonville. However, local authorities might ask for an official ID.

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

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

  • Which airline alliances offer flights from Ontario to Jacksonville?

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

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

    The two airlines most popular with KAYAK users for flights from Ontario to Jacksonville are Southwest and Delta. With an average price for the route of $442 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 $451 and an overall rating of 7.9.

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

    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 Ontario to Jacksonville.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Jacksonville from Ontario 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 Ontario to Jacksonville?

    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 Jacksonville with an airline and back to Ontario with another airline. Booking your flights between Ontario and JAX 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 Ontario to Jacksonville?

    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 Jacksonville from Ontario 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 Ontario to Jacksonville

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Jacksonville. 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 Ontario to Jacksonville? 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 4283 reviews
7.0Food
8.1Boarding
8.6Crew
7.5Entertainment
8.0Comfort
Airline reviews

The seats are now more narrow. I paid for front row the seats in the front are even more narrow than before.

2.0 MediocreDavid, Feb 2026
SAN - LAS
Read more Southwest reviews

The seats are now more narrow. I paid for front row the seats in the front are even more narrow than before.

The wifi on the plane is great. The only issue that I have is that I prefer an aisle seat and on my trips this week, I was either in the middle or window. If we can work to secure aisle seating, I will be thrilled. Nice trip.

Great flight but super high price. Glad it was a business trip and not personal

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

We got exit row seats both flights. Everything was running on time

Okay, not wonderful. Short flight. Wi-fi didn't work properly. Stuck waiting for a gate to open upon arrival for 20 or so minutes.

They sent a notice that they were boarding an hour early. We had to leave the club and run to the gate. They said sorry, that came from corporate and was a mistake. They did not have enough seating because the flight before it had not taken off on time. They moved our gate and delayed it for an hour.

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.

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

Sorry I didn't realize I was writing a review for each leg. Please see my previous review - it applies to the entire flight, not just a single leg.

boarded at 5:30 pm, pushed away from gate at 6pm ... takeoff was not until ~6:45pm; disappointing

Paid for wifi that didn't work. No plug in seat to work. No entertainment.

The flight was delayed and oversold. I volunteered to give up my seat for compensation. Thinking I could get a good night's sleep instead of arriving home at 2 am. It took over an hour to get the new reservation confirmed, three different gate attendants, and two red coats. It took even longer to confirm the overnight hotel, and when I arrived, the line was 45 minutes long, with two people checking in, and at least 15 people slowly, very slowly—no food except frozen convenience food, no coupon for food from airlines. Slept, headed back to the airport, and that flight had an equipment change and a gate change just as they were about to board. It took an additional hour to board as they cleaned the plane from storage.

Comfort Plus seat 11E seemed smaller than prior flights. The movie selection is good. Watched most of the most recent Tron movie. I'll watch the remaining part later as my movie is saved in the Delta Seatback Experience.

Delta is a good airline. I've never had an issue with Delta. I'll continue to fly with them until they show me that I shouldn't.

Original flight was cancelled and when i was rebooked by the airline, they couldn't seat me in the same type of seat as I had originally booked (went from window/aisle to middle/middle and one was a bulkhead seat, and other wasn't in the same class)

First, Delta needs more flights to/from Miami. Second, a 1000pm leaving at 1230pm is unacceptable from their biggest airport world hub. Another aircraft could have been used such as the aircraft scheduled to be used in the morning for that exact same route. Yes, I did get me there but the lack of sleep the next day didn't help me enjoy my entire trip since I was busy with activities during the weekend. This can be and is expected from Spirit (going bankrupt) and Frontier (despite they're nickel and dimers). But from Delta's World Hub? That's totally unacceptable!

Service in business class was not impressive. I ordered coffee with dinner and then watched other people get 2 refills before I got my 1 cup of coffee, and only after I pressed the attendant button overhead. Furthermore, the seats in the forward cabin need maintenance on this 737-800: the upholstery is detaching from the seat frame, at least on the backs of seats 1C, 1D.

I truly love flying with Delta. They have always treated me with the upmost respect

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

Terrible. No customer service, no food, no drinks on a 6 hour premier economy booking.

Much better than Spirit. I was please by the easy fast check in and boarding

In overall it was a good experience, the only down point was that the entertainment screen was working properly.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

The flight crew where really good. Better then the crew from BNE to SFO

left on time, reasonable boarding process arrived early luggage came out quickly

I’m so sorry, I can’t remember her name, I believe it was Dimpti. She was stellar, also a mature Asian flight attendant, lots of flowers in her hair, just as amazing! But literally the crew was AWESOME . Only downside is there weren’t any charging outlets. Maybe I needed to ask a flight attendant , but it would’ve been nice to have one easily accessible.

Flight was on time and the meal and service were good.

Old equipment, needs upgrade and seat comfort. Internet didn't work 75% or the time.

No gates avail at DFW so our incoming had to wait 30 mins for a plane to push back because they Had mechanical. We boarded 90 mins delayed and then we had a mechanical. Come on American…do better. Also at my seat the tray table had not been cleaned. Floor had not been cleaned. But captain and flight Att were very picture and apologetic.

It was a little concerning to hear the ground crew arguing with the flight crew over baggage space. Instead of taking them and checking them, they started checking for space in the first class cabin moving items around like the flight crew didn't know what they were doing. I was embarrassed for them.

On the plus side, crew was attentive, drinks were cold, and in-flight entertainment selection was better than some other airlines. On the negative aide, Plane was delayed almost an hour, either no announcements from the gate crew. Biscoff cookies are gross, appreciate airlines that give a choice. Also, crew had no personality or enthusiasm at all.

UGH I HAD TO MISS MY FIRST FLIGHT TO TAMPA CAUSE OF THE 10 MINUTE DELAY OF THE ORLANDO TO MIAMI ONE SO THEY HAD ME GET ANOTHER TICKET. I AM NOT HAPPY AT ALL BECAUSE IT MADE ME MISS MY CONNECTING FLIGHT FROM TAMPA TO LONDON AND FORCED ME TO MISS A DAY AT MY ROOM IN THE UK.

Wish they didnt delay off-boarding for 10 minutes so i could connect to my flight from miami to tampa

We experienced gate changes and a long delay. My seat was dirty when I boarded and I had to use wipes to clean it myself. There was an unpleasant and overpowering cleaning product scent on the plane as well that lingered through the flight.

The flight was on time and arrived early. The crew were friendly and helpful.

I got sick nothing contagious but distressing and the care I received by Kayla? Keighly the flight attendant will be memorable for ever. Thank You

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

Information on your arrival and departure airports