ONT - OAJ

$179 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 3/5. 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
$497
Overall average: $491
Delta
Sat 6/13Mon 6/22
ONT - OAJ • 1 stop
Cheapest one-way
$179
Delta
Thu 3/5
ONT - OAJ • 1 stop
Top airlines
Delta
Cheapest • from $497 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
January
Cheapest • 34% price drop
November
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-OAJ)

 
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

Sat, Jun 13 - Mon, Jun 22
Delta Logo
10:59 pm - 11:14 am
ONT
-
OAJ
9h 15m
1 stop
Delta Logo
11:06 am - 6:15 pm
OAJ
-
ONT
10h 09m
1 stop
$497Delta
Wed, Feb 25 - Sun, Mar 1
American Airlines Logo
11:58 pm - 3:46 pm
ONT
-
OAJ
12h 48m
2 stops
American Airlines Logo
4:11 pm - 9:24 pm
OAJ
-
ONT
8h 13m
1 stop
$539American Airlines
Fri, Feb 27 - Tue, Mar 3
American Airlines Logo
11:58 pm - 12:38 pm
ONT
-
OAJ
9h 40m
2 stops
American Airlines Logo
2:03 pm - 7:45 pm
OAJ
-
ONT
8h 42m
1 stop
$541American Airlines
Wed, Feb 25 - Sun, Mar 1
Delta Logo
1:15 pm - 10:35 pm
ONT
-
OAJ
6h 20m
1 stop
Delta Logo
2:15 pm - 9:05 pm
OAJ
-
ONT
9h 50m
1 stop
$544Delta
Fri, Feb 27 - Tue, Mar 3
American Airlines Logo
11:58 pm - 12:38 pm
ONT
-
OAJ
9h 40m
2 stops
American Airlines Logo
7:18 am - 6:42 pm
OAJ
-
ONT
14h 24m
2 stops
$547American Airlines
Sun, May 3 - Sat, May 9
Delta Logo
7:05 am - 6:09 pm
ONT
-
OAJ
8h 04m
1 stop
Delta Logo
5:45 am - 10:57 am
OAJ
-
ONT
8h 12m
1 stop
$557Delta
Fri, Mar 13 - Sat, Mar 21
Delta Logo
12:57 pm - 10:33 pm
ONT
-
OAJ
6h 36m
1 stop
Delta Logo
4:40 pm - 9:00 pm
OAJ
-
ONT
7h 20m
1 stop
$584Delta
Sun, May 3 - Sat, May 9
American Airlines Logo
11:59 pm - 3:49 pm
ONT
-
OAJ
12h 50m
2 stops
American Airlines Logo
4:17 pm - 9:07 pm
OAJ
-
ONT
7h 50m
1 stop
$618American Airlines
Fri, Mar 13 - Sat, Mar 21
Delta Logo
12:57 pm - 10:33 pm
ONT
-
OAJ
6h 36m
1 stop
Delta Logo
5:43 am - 4:28 pm
OAJ
-
ONT
13h 45m
2 stops
$619Delta
Sat, Jul 11 - Sat, Jul 18
Delta Logo
10:59 pm - 11:14 am
ONT
-
OAJ
9h 15m
1 stop
Delta Logo
11:06 am - 6:15 pm
OAJ
-
ONT
10h 09m
1 stop
$635Delta
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 $329 (return) on average. On the other hand, the most expensive months are April and May, where the average cost of round-trip tickets is $703 and $687 respectively.

Good to know

Low seasonApril
Cheapest flight$179
Best time to beat the crowds but there is an average 41% increase in price.
Most popular time to fly and prices are also 16% lower on average.
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 $179 for a one-way ticket and $497 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 airports will I be using when flying from Ontario to Jacksonville?

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

  • 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?

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

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

    The two airlines most popular with KAYAK users for flights from Ontario to Jacksonville are Delta and American Airlines. With an average price for the route of $496 and an overall rating of 7.9, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $499 and an overall rating of 7.2.

  • 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 OAJ 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 airlines flying 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.
7.9
DeltaOverall score based on 8191 reviews
8.1Boarding
8.5Crew
7.9Comfort
7.2Food
7.8Entertainment
Airline reviews

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

8.0 ExcellentBryan, Feb 2026
SFO - ATL
Read more Delta reviews

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

Smooth boarding, pleasant and professional lady checking us in. Crew service was excellent, again pleasant, but professional. Nice touch-down on landing! Thank you Delta. 💗

Awesome! On time flight, early arrival, and a complimentary upgrade!

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

The flight was delayed for about 2 hrs. Other than it, it was good.

I am extremely disappointed that delta internal pilot manuals now refer to the Gulf of Mexico as the “gulf of America”. You can bow down to the Orange turd on your own. I will never fly delta again

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

This was a horrible experience. I’ve experienced several delays at this point and still not home. I was supposed to be home by 8:30 last night and here I sit at 7 am on a plane STILL unable to go home because of American Airlines.

I would like the crew to talk LESS over the PA and specifically about credit card offers. I am trying to work, sleep, watch a movie and the PA was booming about a credit card offer. Could we go back to the days when the customer was more important than selling a credit card?

It was a good trip. Flight Attendants were friendly and responsive.

Crew in Columbia was not prepared for landing. It was a bit of a disaster and getting bags took forever.

Tell the crew (when boarding) to yell at the imbeciles blocking us from walking up to scan. I promise everyone crowds around and half of us (most the time I’m group 4) have to push our way through. Your staff is awesome, the public - not so much-

It was fine. My connection in Charlotte to go to WPB was too late and I had to spend the night in the Charlotte Airport in the mini suites.

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

Nothing to write home about, average flight experience. Seats were spacious enough, crew friendly enough. Loved the AA entertainment/wifi service.

Great flight - friendly and attentive team! Seats in coach were comfy, but a little cramped - but that is the case with all airlines ;)

Experience was good, however I had a delay due to weather happening and had to re purchase a seat on a new plane for a higher price (could be my own issue and misunderstanding) but other than that situation. First time flyer (by myself) was terrific!! The last from ORD to ALO didn't have wifi, but it was only 45 minutes so I'm sure that was part of the reason. Overall my experience was great! Next time I will remember to buy tickets with longer layovers. The delays really saved my overall anxiety. :)

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

Information on your arrival and departure airports