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ORD - ONT

$52 Find Cheap Flights from Chicago O'Hare Airport 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 O'Hare Intl to Ontario departing on 11/14. 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
0 bags

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago 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 Chicago to Ontario, as well as popular online travel agencies
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Cheap Flight Deals from Chicago O'Hare Airport to Ontario (ORD-ONT)

 
These are the cheapest deals for flights from O'Hare Intl to Ontario currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from O'Hare Intl to Ontario

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from O'Hare Intl to Ontario.

Recent one-way flight deals from O'Hare Intl to Ontario

Only flying one-way? Below are some of the best one-way flight deals from O'Hare Intl to Ontario found on KAYAK recently.

Recent last minute flight deals from O'Hare Intl to Ontario

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from O'Hare Intl to Ontario.

Recent direct flight deals from O'Hare Intl to Ontario

The latest deals for direct flights from O'Hare Intl to Ontario so you can sit back and relax without the need for a layover.

Cheap bus & train deals from O'Hare Intl to Ontario

Find recent round-trip train or bus tickets from O'Hare Intl to Ontario.

All round-trip flight deals to Ontario

The cheapest plane tickets to Ontario found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
7:45 am - 1:40 pmORD-ONT
7h 55m1 stop
8:00 pm - 12:10 amONT-ORD
26h 10m1 stop
$101Frontier
Find Deal
Thu, Oct 24 - Wed, Oct 30
4:44 pm - 8:25 amORD-ONT
17h 41m1 stop
6:30 am - 11:12 pmONT-ORD
14h 42m1 stop
$102Frontier
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Sat, Nov 2 - Sat, Nov 9
4:44 pm - 8:25 amORD-ONT
17h 41m1 stop
4:07 pm - 8:32 amONT-ORD
14h 25m1 stop
$105Frontier
Find Deal
Sat, Nov 2 - Sat, Nov 9
4:44 pm - 8:25 amORD-ONT
17h 41m1 stop
4:07 pm - 8:32 amONT-ORD
14h 25m1 stop
$106Frontier
Find Deal
Sat, Nov 2 - Sat, Nov 9
4:44 pm - 11:58 pmORD-ONT
9h 14m1 stop
5:45 am - 3:29 pmONT-ORD
7h 44m1 stop
$108Frontier
Find Deal
Tue, Oct 29 - Sat, Nov 2
5:14 pm - 11:17 pmORD-ONT
8h 03m1 stop
11:29 am - 5:28 amONT-ORD
15h 59m2 stops
Mon, Oct 21 - Tue, Oct 29
5:50 am - 11:42 amORD-ONT
7h 52m1 stop
7:00 am - 6:51 pmONT-ORD
9h 51m1 stop
$246Delta
Find Deal
Wed, Feb 19 - Wed, Feb 26
7:15 am - 12:28 pmORD-ONT
7h 13m1 stop
6:00 am - 1:49 pmONT-ORD
5h 49m1 stop
$248Delta
Find Deal
Tue, Jan 7 - Thu, Jan 9
7:09 am - 1:58 pmORD-ONT
8h 49m1 stop
11:59 pm - 9:25 amONT-ORD
7h 26m1 stop
$302American Airlines
Find Deal
Wed, Dec 25 - Mon, Dec 30
2:20 pm - 10:23 pmORD-ONT
10h 03m1 stop
6:00 am - 7:47 pmONT-ORD
11h 47m2 stops
$341United Airlines
Find Deal
Thu, Nov 14 - Tue, Nov 19
7:45 am - 1:39 pmORD-ONT
7h 54m1 stop
$52Frontier
Find Deal
Thu, Nov 14
5:14 pm - 11:17 pmORD-ONT
8h 03m1 stop
$54Frontier
Find Deal
Mon, Oct 28
6:00 am - 9:43 amORD-ONT
29h 43m2 stops
Tue, Oct 29
11:14 am - 9:43 amORD-ONT
24h 29m3 stops
Tue, Oct 29
2:15 pm - 10:45 pmORD-ONT
10h 30m1 stop
$123Delta
Find Deal
Wed, Nov 13
1:35 pm - 11:01 pmORD-ONT
11h 26m2 stops
$128Delta
Find Deal
Wed, Nov 13
10:42 am - 3:23 pmORD-ONT
6h 41m1 stop
$245American Airlines
Find Deal
Mon, Nov 25
2:35 pm - 8:44 pmORD-ONT
8h 09m1 stop
$294United Airlines
Find Deal
Tue, Nov 26
6:30 am - 1:07 pmORD-ONT
8h 37m1 stop
$309United Airlines
Find Deal
Sun, Oct 20
5:00 am - 9:00 amORD-ONT
6h 00m1 stop
$328American Airlines
Find Deal
Sun, Oct 27
4:02 pm - 11:38 pmORD-ONT
9h 36m1 stop
6:10 pm - 9:44 amONT-ORD
13h 34m1 stop
$174Frontier
Find Deal
Fri, Oct 11 - Sun, Oct 13
6:29 pm - 7:25 amORD-ONT
14h 56m1 stop
5:45 am - 12:53 amONT-ORD
17h 08m1 stop
$238Frontier
Find Deal
Fri, Oct 11 - Mon, Oct 14
6:24 pm - 11:58 pmORD-ONT
7h 34m1 stop
10:43 am - 8:15 pmONT-ORD
7h 32m1 stop
$264Frontier
Find Deal
Mon, Oct 14 - Wed, Oct 23
6:29 pm - 11:58 pmORD-ONT
7h 29m1 stop
4:16 pm - 5:30 amONT-ORD
11h 14m2 stops
Fri, Oct 11 - Thu, Oct 24
1:05 pm - 7:32 pmORD-ONT
8h 27m1 stop
7:00 am - 5:28 amONT-ORD
20h 28m1 stop
$471Alaska Airlines
Find Deal
Sat, Oct 12 - Sun, Nov 3
1:05 pm - 7:32 pmORD-ONT
8h 27m1 stop
6:30 pm - 5:00 amONT-ORD
8h 30m1 stop
$492Alaska Airlines
Find Deal
Sat, Oct 12 - Thu, Oct 31
12:45 pm - 5:17 pmORD-ONT
6h 32m1 stop
6:00 am - 7:47 pmONT-ORD
11h 47m2 stops
$522United Airlines
Find Deal
Sat, Oct 12 - Thu, Oct 31
7:40 am - 11:57 amORD-ONT
6h 17m1 stop
1:05 pm - 9:44 pmONT-ORD
6h 39m1 stop
$528Delta
Find Deal
Sat, Oct 12 - Sat, Oct 19
3:45 pm - 11:47 pmORD-ONT
10h 02m2 stops
10:00 pm - 8:17 amONT-ORD
8h 17m1 stop
$533Delta
Find Deal
Thu, Oct 10 - Mon, Oct 14
4:41 pm - 10:56 pmORD-ONT
8h 15m1 stop
6:35 pm - 4:59 amONT-ORD
8h 24m1 stop
$618United Airlines
Find Deal
Sat, Oct 12 - Sun, Oct 13

Flights from O'Hare Intl to Ontario - Travel Insights & Trends

Get data-powered insights and trends into flights from O'Hare Intl 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 Chicago O'Hare Airport to Ontario?

The average price of all flights from Chicago O'Hare Intl Airport to Ontario clicked on KAYAK for each day over the last 12 months.
When flying from Chicago O'Hare Airport to Ontario, you should consider leaving on a Tuesday and avoid Sundays if you are looking for the best rates. For your return to Chicago O'Hare Airport, you’ll find the best rates on Saturdays and the most expensive ones on Mondays.

What is the cheapest month to fly from Chicago O'Hare Intl Airport to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Chicago O'Hare Intl Airport 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 Chicago O'Hare Intl Airport to Ontario is September, where tickets cost $166 on average. On the other hand, the most expensive months are December and January, where the average cost of tickets is $360 and $357 respectively.

How far in advance should I book a flight from Chicago O'Hare Intl Airport to Ontario?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Chicago O'Hare Intl Airport to Ontario, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Chicago O'Hare Intl Airport to Ontario, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 34 days before departure.

Good to know

Low season

July

High season

March

Cheapest flight

$52
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly with an average 19% increase in price.
Flight from Chicago O'Hare Airport to Ontario

When to book flights from O'Hare Intl to Ontario

Are your dates flexible? Find out the best times to travel from O'Hare Intl 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 Chicago O'Hare Airport to Ontario flights

  • What is the cheapest flight from Chicago O'Hare Intl Airport to Ontario?

    In the last 3 days, the lowest price for a flight from Chicago O'Hare Intl Airport to Ontario was $52 for a one-way ticket and $101 for a round-trip.

  • Do I need a passport to fly between Chicago O'Hare Airport 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 aircraft models fly most regularly from Chicago O'Hare Airport to Ontario?

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

  • Which airline alliances offer flights from Chicago O'Hare Airport to Ontario?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Chicago O'Hare Airport and Ontario, with oneworld being the most commonly used for this route.

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

    The two airlines most popular with KAYAK users for flights from Chicago to Ontario are Delta and United Airlines. With an average price for the route of $363 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $588 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Chicago O'Hare Airport 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 Chicago O'Hare Airport to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Chicago O'Hare Airport 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 Chicago O'Hare Airport 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 Chicago O'Hare Airport with another airline. Booking your flights between Chicago O'Hare Airport 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 Chicago O'Hare Airport 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 Chicago O'Hare Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 5 airlines serving from O'Hare Intl to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Chicago 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 O'Hare Intl 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 8969 reviews
8.0Entertainment
7.4Food
7.9Comfort
8.6Crew
8.2Boarding
Airline reviews

Great. Flight departed early and arrived early. Deplaning and baggage claim ww were quick.

8.0 ExcellentJeffrey, Oct 2024ATL - SNA
Read more Delta reviews

Great. Flight departed early and arrived early. Deplaning and baggage claim ww were quick.

They separated our seats and moved us to the back of the plane. Hundreds of dollars and thousands of miles used and this was my platinum member experience.

AC barely worked on a 50 minute flight. It was very warm the whole flight. Flight was very bumpy and hard landing.

Got on the plane and then needed to deboard the plane because they didn’t have any pilots?

The flight was canceled two hours before departure, it took over five hours to rebook us on another flight.

Rough day of travel all the way around. Wrong info given to us multiple times and mistakes in their booking making our trip 10 hours longer than planned. I’m bummed because I fly Delta all the time and love them. Mistakes happen. Just bummed that this was a rare trip our whole family was traveling together.

Meh. A late flight meant I missed my connections, and a 2pm LAX arrival turned into gettin in after midnight.

It was very cold because the air conditioner was on high power, and my son got sick.

It was good until there was a 3 hour delay because there was not any pilots to fly the plane.

Had to change aircraft due to a faulty door. Surprisingly it only caused about an hour and a half of delay. Delta handled this situation as well as can be expected.

I still prefer Delta, but Delta doesn’t fly to State College PA.

Everything was fantastic. Modern plane. All the amenities! Although the paid snacks and meals are pure robbery. Like i understand airlines need to make money, but 11$ USD for an overnight oats with some nuts in it and barely any pieces of apple.... Highway robbery

The flight was bumpy. No Breakfast or coffee was served, not even a bottle of water. The food was okay but odd. Rice with peas instead of couscous with some unknown green thing. United Airlines did not tell me that there was VERY LIMITED HANDICAP SERVICE IN NAPLES. De-plane via 20 aluminum steps. Taken to Van. You must walk into the terminal, find luggage, and then walk out to the rental car pickup spot that is 1 block from the terminal.

Crew did their best but the plane configuration is too tight if you're bigger than an average sardine. Controls for the entertainment system didn't all work. The aircraft hadn't been cleaned in awhile.

Didn't make it dir to delays - no support from United staff

My flight was delayed for a whole day, so I lost a day of my vacation.

flight delayed, was put on another flight after standby queue, luggage was misplaced and arrived to me 3 days later

The baggage handlers broke the handle on my bag that they put under the plane that I checked on the jetway. They traded it out for a less quality bag in Tulsa. But, they said they would try to fix it. Bologna! There was no fixing that bag handle. Someone didn’t care how they treated the bag.

Flighty delayed on boarding - then group 1 had to check their carry on bags but groups 3 and beyond could carry bags on - very inconvenient for weekend business trip with no checked baggage. Then delayed on the runway - before take off. No communication from pilot on why or how long. Wifi/Entertainment didn't work for 4+ flight. Upon arrival, attendants announced wrong carousel for baggage claim - everyone was waiting at the wrong place for their checked bags. This was a mess united!

There was no screens on board AND the WiFi didn’t work. My seat was broken and couldn’t recline so I couldn’t even sleep. The flight attendants didn’t offer anything to make it more comfortable. It was such an old cramped plane, when the person in front of me reclined I couldn’t even open my tray table. All the United ads talk about guaranteeing everyone gets a screen!

I had a TERRIBLE experience with the AA crew. I believe it was disability-related. It’s unlikely I will fly AA again.

Baby cried a lot. Nothing anyone could do about it. Just part of flying.

The flight crew was fantastic! Which the seats had a small TV.

The flight was delayed till next day ! They kept delaying every 30 minutes then after 3 hours they delayed it till next day. We kept waiting in line standing more than an hour to get the hotel and meal vouchers. There was no communication at all. Everything was bad

Smoothe flight. Pilot and crew did a great job. Uncomfortable seat in this jet, felt worn out

seats were way too small. Too short of a flight to offer amenities.

The main problem was delay. The plane was at the gate early and bags were loaded. However, there was no crew for the flight. They were inbound from LGA and had to land and make their way to our gate. It took more than 40 minutes. Then, once the crew arrived and boarded, one of the crew members had to deplane and then a replacement crew member had to be found. It took another 40 minutes or so to get the final crew member. In all, we took off about 2 hours later than our scheduled departure time. Once in the air, the flight was great. Smooth most of the way. The crew was professional and efficient.

Perfect flight. Efficient boarding, on time take off and early arrival. Generally smooth flight.

American is a steady for me. I always get what I expect from them. Sincere effort to get me from one place to another.

BAD. As a family could not sit together. The gate agent told us there was only one seat in the middle left, when we got on the plane the situation was very different with whole rows of seats empty

Paid extra for a “comfy seat” which was anything but!

It was cancelled unexpectedly so we rented a car and drove home.

Everything that was available was excellent. Spacious and comfortable, with lovely and helpful crew (one was having a bit of a sour day, but that happens). We sat on the tarmac for one hour and seven minutes waiting for our gate to clear in SAN, but the pilot kept us informed and, amazingly, was very professional in not ragging on the airport (whose fault it was).

Flight was delayed 8 hours so far. Don’t expect to fly when choosing Spirit Airlines. I will happily pay more to never deal with this company again.

This airline is effective for the price you pay, do not expect anything extra at all. You have to pay extra for seat assignment , carry on luggage, food, you name it ...and even if you pay extra for better seats they do not recline.

Got on quickly and easily. When it turned out the other two seats in my row would be occupied, a nearby flight attendant immediately let me know that I could move one row behind me since it was an empty row, I moved into the window seat where I could relax enough to take a little nap. Can’t ask for much more.

The flight was delayed, and we waited for more than an hour on the plane.

Could at least have little recline in economy seats and windows to the last row, they were super uncomfortable and lots of chit chat and disturbance from the operation of crew members and other passengers

Was told by one of the helpers at spirit in Detroit that I had to pay for my bag that could fit on the over head bin after I asked her repeatedly well what about the over head bin can’t my bag fit in there she said no I had to check it. Then sent me the long way to the tsa when my gate was the other way. I didn’t have that problem in Chicago.

Cancelled after 3 hour delay with no aside from a rebooking three days later.

Every day about it was very different all the boarding pass where all wrong l miss flight no refund all crazy

Airline changed the gate from Terminal A to Terminal D which is quite far and only sent a text message few minutes before boarding. Around 50 people missed their flight and as plane didn’t wait for them.

Flight got delayed for 3.5 hours, and for the first hour after the departure time there was no update from the gate folks...

The personal at boarding are rude and try to steel people with their rule of personal item , really bad experience for us

Both flights were delayed. The sizing of bags is crazy. I know it is advertised as a no frills cheaper option but it does feel like you are being extorted for money the whole way-- $20 dollars to talk to a gate agent? Charging for soda a pretzels? I don't think I will be flying Frontier again if I can help it. That said, all the staff were wonderful.

Staff members pretty horrible when boarding. No care for customers

The trip was good but the last minute changes I didn’t like because I had already talked to the attendee and they didn’t help me with my ticket I was having trouble checking in and when the time was up they help me but charge me for that and last minute luggage it was a small bag. After I was in the airplane I realized you were charging because the flight was almost empty and you have to get the money some how. Thanks for everything.

I was shocked that there is no Wi-Fi, my flight was changed and delayed multiple times. In fact, I’m still not home…

I did not like that people are purposely split ip who book at the same time because we didn’t buy seats. No other airline does that.

Frontier is definitely a good option for people traveling light or on a budget - just remember to bring your own entertainment and your own headphones if you need them.

Book cheap flights from Chicago to Ontario

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Chicago to Ontario found on KAYAK in the last 72 hours.
11/14Thu
1 stopFrontier
7h 54mORD-ONT
$52
10/28Mon
1 stopFrontier
8h 03mORD-ONT
$54
10/29Tue
2 stops
29h 43mORD-ONT
$106
10/29Tue
3 stops
24h 29mORD-ONT
$115
11/13Wed
1 stopDelta
10h 30mORD-ONT
$123
11/13Wed
2 stopsDelta
11h 26mORD-ONT
$128
11/25Mon
1 stopAmerican Airlines
6h 41mORD-ONT
$245
11/26Tue
1 stopUnited Airlines
8h 09mORD-ONT
$294
10/20Sun
1 stopUnited Airlines
8h 37mORD-ONT
$309
10/27Sun
1 stopAmerican Airlines
6h 00mORD-ONT
$328

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Last minute flights from O'Hare Intl to Ontario

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Chicago to Ontario that are departing in the next 10 days.
10/11Fri
multi-stopFrontier
9h 36mORD-ONT
10/13Sun
multi-stopFrontier
13h 34mONT-ORD
$174
10/11Fri
multi-stopFrontier
14h 56mORD-ONT
10/14Mon
multi-stopFrontier
17h 08mONT-ORD
$238
10/14Mon
multi-stopFrontier
7h 34mORD-ONT
10/23Wed
multi-stopFrontier
7h 32mONT-ORD
$264
10/11Fri
multi-stop
7h 29mORD-ONT
10/24Thu
multi-stop
11h 14mONT-ORD
$456
10/12Sat
multi-stopAlaska Airlines
8h 27mORD-ONT
11/3Sun
multi-stopAlaska Airlines
20h 28mONT-ORD
$471
10/12Sat
multi-stopAlaska Airlines
8h 27mORD-ONT
10/31Thu
multi-stopAlaska Airlines
8h 30mONT-ORD
$492
10/12Sat
multi-stopUnited Airlines
6h 32mORD-ONT
10/31Thu
multi-stopUnited Airlines
11h 47mONT-ORD
$522
10/12Sat
multi-stopDelta
6h 17mORD-ONT
10/19Sat
multi-stopDelta
6h 39mONT-ORD
$528
10/10Thu
multi-stopDelta
10h 02mORD-ONT
10/14Mon
multi-stopDelta
8h 17mONT-ORD
$533
10/12Sat
multi-stopUnited Airlines
8h 15mORD-ONT
10/13Sun
multi-stopUnited Airlines
8h 24mONT-ORD
$618

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Everything you need to know for your flight from O'Hare Intl to Ontario

Information on your arrival and departure airports