OAJ - ONT

$357 Find Cheap Flights from Jacksonville to Ontario

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Jacksonville to Ontario departing on 9/3. 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

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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Flight Deals

Cheap Flights from Jacksonville to Ontario (OAJ-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

Wed, Sep 3 - Sat, Sep 6
Delta Logo
5:55 am - 10:35 amOAJ-ONT
7h 40m1 stop
Delta Logo
11:45 am - 9:49 pmONT-OAJ
7h 04m1 stop
$357Delta
Find Deal
Wed, Sep 3 - Sat, Sep 6
American Airlines Logo
6:10 am - 4:05 pmOAJ-ONT
12h 55m2 stops
American Airlines Logo
10:35 pm - 8:34 amONT-OAJ
6h 59m1 stop
$362American Airlines
Find Deal
Wed, Sep 3 - Sat, Sep 6
American Airlines Logo
2:21 pm - 9:24 pmOAJ-ONT
10h 03m1 stop
American Airlines Logo
10:35 pm - 8:34 amONT-OAJ
6h 59m1 stop
$367American Airlines
Find Deal
Sat, Aug 30 - Wed, Sep 3
American Airlines Logo
9:08 am - 3:32 pmOAJ-ONT
9h 24m1 stop
American Airlines Logo
10:35 pm - 9:52 amONT-OAJ
8h 17m1 stop
$441American Airlines
Find Deal
Sat, Aug 30 - Wed, Sep 3
Delta Logo
4:30 pm - 10:40 pmOAJ-ONT
9h 10m2 stops
Delta Logo
11:45 am - 9:59 pmONT-OAJ
7h 14m1 stop
$446Delta
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Thu, Oct 9 - Thu, Oct 30
American Airlines Logo
1:41 pm - 8:07 pmOAJ-ONT
9h 26m1 stop
American Airlines Logo
10:29 pm - 9:54 amONT-OAJ
8h 25m1 stop
$464American Airlines
Find Deal
Thu, Oct 9 - Thu, Oct 30
American Airlines Logo
1:41 pm - 8:07 pmOAJ-ONT
9h 26m1 stop
American Airlines Logo
11:59 pm - 2:59 pmONT-OAJ
12h 00m2 stops
$469American Airlines
Find Deal
Sat, Aug 30 - Wed, Sep 3
Delta Logo
4:30 pm - 10:40 pmOAJ-ONT
9h 10m2 stops
Delta Logo
6:05 am - 9:59 pmONT-OAJ
12h 54m2 stops
$478Delta
Find Deal
Tue, Oct 14 - Mon, Oct 20
Delta Logo
4:30 pm - 10:22 pmOAJ-ONT
8h 52m1 stop
Delta Logo
11:36 am - 10:43 pmONT-OAJ
8h 07m1 stop
$487Delta
Find Deal
Thu, Oct 9 - Thu, Oct 30
American Airlines Logo
1:41 pm - 9:49 pmOAJ-ONT
11h 08m2 stops
American Airlines Logo
11:59 pm - 2:59 pmONT-OAJ
12h 00m2 stops
$561American Airlines
Find Deal
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’s the cheapest day of the week to fly from Jacksonville to Ontario?

The average price of all round-trip flights from Jacksonville to Ontario clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Jacksonville to Ontario, look for departures on Fridays and avoid leaving on a Thursday, as it's usually the priciest day. When flying back from Ontario, Tuesday is the cheapest day to fly and Friday is the most expensive.

Good to know

Cheapest flight$357
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 $433 for a one-way ticket and $357 for a round-trip.

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

    No

  • 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?

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

  • 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 airline flying 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
DeltaOverall score based on 7982 reviews
7.9Comfort
7.9Entertainment
8.5Crew
7.3Food
8.2Boarding
Airline reviews

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

6.0 GoodBarbie, Aug 2025MSP - SFO
Read more Delta reviews

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

Flight was delayed, 30+ bags had to be gate checked. Crew were very friendly!

Food was surprisingly good but the WiFi was not great

My flight was extremely cold. I had a jacket and a cover was left in each seat. The cover was extremely thin and I have a disability, fibromyalgia and arthrithis and AC air is the worst. I closed my vent and my husbands vent and it still was frigid. I asked the attendant if I could get another cover and she quickly almost dismissively and totally unconcerned stating, (I quote) (one per chair) and walked off so quickly that I didn't get a chance to explain to her that I literally have adisability. I didnt want to make a seen so I set on that flight for over 5 hours in pain, joints locking up and extremely uncomfortable. When my fibromyalgia flares up my joints not only ache but they will lock up also and it takes me days to get back to my regular self even though I take medication for it. I felt like it would not have hurt anyone at all for her to just give me an extra cover because I'm sure they have all types of medical issues in people that fly every day.

Not a "Delta" issue, but a JFK issue: We booked a connecting flight with 3 1/2 hours between to clearn immigration and customs. Our inbound flight (BCN to JFK) was on the taxiway 45 minutes which ate into our layover time. Immigtration was insanely quick with the CBP MPC app; however, clearing TSA (again, after we were ALREADY cleared in Spain on the inbound international flight) took over 95 minutes. This left us with 10 minutes before boarding the connecting flight (JFK to SAN) to walk to the far end of Terminal 4 and try to find food. We didn't find any food that could promise to serve us in under 10 minutes so we boarded the Delta flight after coming off a plance and an 8-hour flight knowing that we wouldn't be served any food on the next 5 1/2 hour flight. I feel like Delta needs to put pressure on the JFK TSA to open more screening stations (by our count, we saw only 5 scanners open and a line of - as we said - over 90 minutes. The insult is that we WERE ALREADY SCREENED through TSA, but as you come off one flight into the USA, you have to go through the whole process again. It seems like if you have a connecting flight, there should be a way to pass through immigration and customs without needing to return through TSA.

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

The entertainment and wifi mostly didn't work on this flight.

Terrible entertainment system - kept freezing and audio kept cutting out. Snacks were mediocre at best for a 5 hour flight.

I am still upset that my bag was lost on a recent trip to Rome ; we were inconvenienced and out €150 Euros ; delta has refused to reimburse us

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

Information on your arrival and departure airports

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