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Find Cheap Flights from Ontario

Where can I fly from Ontario?Prices from ONT, departing Wed 11/25 and returning Wed 12/2
Booking Insights

KAYAK's insights & trends for flights from Ontario

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

Which are the most popular places to fly to from Ontario?

Based on KAYAK flight searches, the most popular place to fly from Ontario is New York (11% of total searches). The next most popular destinations are Seattle/Tacoma Intl (10%) and San Francisco (10%).

What are the most popular international flights out of Ontario?

There are many international destinations you can fly to from Ontario. The most popular international destinations among KAYAK users are Tokyo, Mexico City and Taipei City.

What are the most popular countries to fly to from Ontario?

Based on KAYAK flight searches, the most popular country to fly to from Ontario is Taiwan (54% of total searches). The next most popular destinations are Mexico (38%) and El Salvador (8%).

Which cities can I fly to direct from Ontario?

There are loads of places you can fly direct to from Ontario. The most popular destinations for direct flights among KAYAK users are Chicago, Phoenix, Portland, Honolulu and Denver. On average, the cheapest of these destinations on KAYAK over the last 2 weeks for a return flight was Chicago at $178, while the most expensive was Portland, at $348.

Which international cities can I fly to direct from Ontario?

There are many international destinations you can fly to non-stop from Ontario. The most popular international destinations from KAYAK users are Taipei City and Guadalajara. On average, the cheapest of these destinations on KAYAK over the last 2 weeks for a return flight was Guadalajara at $239, while the most expensive was Taipei City, at $479.

What are the cheapest places to fly to from Ontario?

The cheapest destination for a flight from Ontario found on KAYAK in the last two weeks was San Francisco and cost $33. The next cheapest destinations were San Jose at $58 and Phoenix at $58.

Good to know

Low season

January

Cheapest flight

$33
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from Ontario to Denver

Flights from Ontario: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew from Ontario to anywhere 
Verified travelerFlew with Alaska Airlines-Mar 2026
TSA security isn’t bad, sometimes gets crowded right before another flight goes out. Smaller airport but has many flight options.
AdrianaFlew with American Airlines-Apr 2026
Check on your flight status often, as things can change and you may not be notified promptly
FraxysFlew with American Airlines-Jun 2025
Bring an empty refillable water bottle/container through TSA and fill it up as soon as you pass the security check. The water station is available to the left and to the right of it.
Verified travelerFlew with Frontier-Dec 2024
Pack light and arrive earlier.. Also download the App and check your flight and check in..
LeoFlew with American Airlines-Sep 2024
Have plenty of patience for the casual travelers! They are oblivious of rules and etiquettes that slows down the process for everyone. Case in point, a guy held up the line trying to place both his personal item (should be UNDER the seat in front of you) and his carry on case horizontally. Obviously not aware of the big poster right in front of his displaying the proper way of placing his case on it's side. Slowed the whole line of people behind him. Also be mindful the agents in Ontario airport (or any smaller airports) might not be the most knowledgeable on the rules and regulations of air travel, luggage specification allowances etc. Stay patient!! Also the seats do not recline that well anymore on AA flights. So if you have back problems, be sure to bring some back supports.
MariFlew with American Airlines-Jan 2024
Bring a blanket it's very cold on plane

FAQs for booking flights out of Ontario

  • Do flights from Ontario via Ontario International Airport (ONT) consider persons with reduced mobility?

    Special needs passengers, such as those with restricted mobility or impaired vision, will find it easier to fly from Ontario via ONT. To assist these passengers, all airlines have workers stationed throughout the airport. Anyone who requires special airport services should make their request while making their travel arrangements.

  • Can I park my car at Ontario International Airport?

    Different types of parking indicate the probability of parking your car at the airport. If you've arrived at the airport and have a to-and-fro flight from Ontario, consider parking your car at private, public, or valet parking lots with a surcharge both for short and long parking.

  • Are there nursing rooms at Ontario International Airport?

    Lactating mothers are much considered on flights from Ontario via ONT, for it features two nursing rooms for them. One of these nursing rooms is situated in Terminal 2 on the second floor past the TSA screening across from gate 204, next to the women's restroom. The other one is at Terminal 4 on the second floor across from gate 407, next to the family restroom.

  • Which airlines have lounges at Ontario International Airport in Ontario?

    Consider using the Aspire Lounge in Terminal 2, open to guests traveling with United, Alaska, Frontier, and Delta airlines. The lounge provides unparalleled airfield views, excellent food, and comfortable seating to work or relax.

  • What is Ontario also known as?

    Ontario Airport’s airport code is ONT. It can also be referred to as Ontario, Ontario Intl.

  • How does KAYAK find such low prices on flights from 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 Ontario.

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

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

    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 your destination with an airline and back to Ontario with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from 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 from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding a cheap flight out of Ontario

  • Looking for a cheap flight? 25% of our users found tickets from Ontario to the following destinations at these prices or less: Denver $176 one-way - $270 round-trip; Dallas $209 one-way - $374 round-trip; Taipei City $489 one-way - $839 round-trip
  • Flights from Ontario depart from Ontario International Airport (ONT). Most passengers use Ontario International Airport from Ontario to Mexico and Las Vegas.
  • It would take you approximately 5 minutes to cover the 3 miles connecting the Ontario city center to Ontario International Airport. If you are in a hurry, consider using a private means of transport such as a taxi, Uber, or car rental. A bus or a train is an alternative means of transport if you are not in a hurry to catch your flight.
  • Travelers with the earliest flight from the airport should consider staying in one of the hotels close to it. For instance, you can book a room at Holiday Inn Ontario Airport. This hotel is a 3-minute walk to ONT and provides a complimentary airport shuttle to its guests who are connecting to the airport for a flight and have pieces of luggage.
  • Never leave your pet behind if you have a flight from Ontario through Ontario International Airport. The airport considers animals by building several pet relief areas inside and outside. These areas are close to gates 210 in Terminal 2 and 410 in Terminal 4. The outside pet relief area is located at the end of the terminal building.
  • Everyone understands how stressful it is to travel with children on long vacations. JetBlue Airlines is a good option if you are flying with children from Ontario. This airline provides kid-friendly amenities such as video games, subscribed cartoon channels, plane toys, and free refreshments to keep kids entertained during the flight. This airline's planes boast big, pleasant seats with ample legroom, making it ideal for parents with children on their laps.

Reviews of the top 5 airlines serving from Ontario to Worldwide

 
Need help choosing which airline to fly with from Ontario to Worldwide? 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.
8.3
China AirlinesOverall score based on 853 reviews
7.8Food
8.3Boarding
8.5Crew
8.0Entertainment
8.0Comfort
Airline reviews

We were not sat together for the longeset duration of our travel very uncomfortable didnt enjoy that they fed us at 2 am

2.0 MediocreAnonymous, Jul 2026
Read more China Airlines reviews

We were not sat together for the longeset duration of our travel very uncomfortable didnt enjoy that they fed us at 2 am

I love my Delta crew, they were so welcoming and helpful.

Better organization of boarding procedures. Terrible leadership guiding people to gates.

I did not take the flight, tried to cancel it right after I booked it, but was unable to reach anyone. I blame Kayak for this situation because they sent the booking through another company and I was unable to get anyone to talk to me about the situation. I had to just take the hit and pay for another flight through Cathay Pacific, which was wonderful. I will never use Kayak again. (I bet they don’t post this review!) I’ll just post about them on social media sites. I don’t want anyone to have to go through the hassle and expense I dealt with.

Unable to set seat assignment. Got a call from presumably “China airlines representative” but was asking for an exorbitant amount for the seat assignment. Was traveling as a family end up being assigned to different seats as a result. Will never use underpricer again.

Not many selections for entertainment. Bulk head seats are no longer available with out fee at the counter. That’s pretty lame.

I would have liked to know how to order a special meal (for medical purposes) before the flight.

Ask flight attendant for water during flight and she was a little rude get the water.

For a long-haul flight, the crew did a very good job of keeping the lavatories clean and the aisles clear.

The check-in crew at SF did not put on breakable glass stickers on check-in baggages which caused my antique whisky bottle to break during transportation.

the flight was significantly delayed. Not much was done by the airline to compensate passengers

Boarding now takes twice as long since going with assigned seats.

Not exactly Southwest’s problem, but the new Burbank airport is not great. No restaurants open and tons of work still to be completed. Can’t believe they opened the airport in that condition.

Flight boarded 2.5 hours late (my second southwest flight of the day with late departure), the gate agent was grumpy and unhelpful. Said she was "tired so we aren't going to follow normal boarding order". No complaints about the actual flight crew.

I liked how it boarded fast. I do not like how the seats are just too narrow, and I’m not a big person.

Despite paying for an ‘upgraded’ seat in row 1, I had to put my luggage in the middle of the plane. Snacks were bleh and seat was small and uncomfortable and I am not large. Attendants were fine but not super helpful. Plane just seemed outdated.

Southwest has been a nightmare. Delayed flights, missed connections, systems down. Never again am I flying southwest.

had to check bag at gate when there was still overhead bin space. As usual the WIFI didn't really work.

Flight was delayed, full flight and I had to change gates. Southwest flights are always late later in the day.

I liked receiving attention from aged and well experienced flight attendants. I disliked the non-gluten-free snack but I brought my own so I was OK.

Seats are uncomfortable and left me in pain in my tailbone area. I got about one hour of sleep.

Delay of two hours due to some mechanical issue. Staff was wonderful and the pilot did let us know what was going on.

One of my checked luggage was damaged. Cracked on the top by the handle.

Not so good. Crew was not as attentive as they should have been especially if flying business class. Only offered dinner 2 hours after takeoff. My flight attendant seemed overwhelmed. Pushed my help button but no one came. I explained everything on my previous review.

I have been flying united for a long time but now I’m done

Delayed - leaving, delayed getting to the gate at destination. What should have been a very easy flight and experience was not.

Better management of the boarding process. Is there any way you could forward all the window seats first? That's the Way Reno Air used to do it, and they had the fastest boarding in the industry!

Wifi is very frustrating - could not connect and therefore unable to work on the trip

Entertainment was great. Seats were good. They did not have my pre-ordered hot food product available but did comp me something cold in place of the item.

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

American Airlines was horrible! The layover flight to DFW was delayed with no clear communication and for us having to stay the whole day which led to staying a night in Dallas was comped with 2 $12 dollar vouchers and a crappy hotel. We missed a whole day in Tokyo for our honeymoon and stressed the whole 24 hours. We were supposed to leave at the same time the following day, but that was delayed hours again. And instead of letting the delayed flight go first, they let the flight that was scheduled ahead of us. American should refund us the day wasted in Dallas that should have been in Tokyo! We had lost out on paid events that we can’t get refunded. When we finally did leave, it was a good flight. You would think that was the only issue with American but we from the LAX layover, we were delayed 6 hours and were given a $12 dollar voucher that covered a drink only. The only communication we were given then was that because they were delayed in a prior flight we were delayed again. I don’t understand why it was only with American that we had such a bad time with! They have definitely left a sour taste in our mouths for our honeymoon! And then they did send an email saying we could have 2K miles…. For what? To be delayed into another day and miss our flight again?

The delay was not handled well and the offers to move flights and get travel credit was also not ideal.

The worst seat in any business class. Food are worst then economy class.

American was the airline that Starlux contracted for this trip. I arrived in time to make the connecting flight on American, and then the baggage-handler debacle happened. For some reason, the first class and premium economy passengers' luggage was unloaded first. Never seen this happen before. They had handlers removing the bags from the carousel for those passengers. Meanwhile, all of the economy passengers were waiting for their bags, including me. And there were a lot of bags because it was an international flight packed full. While waiting for 45 minutes, my bag didn't show. Meanwhile, an American representative showed up asking if anyone has a connecting flight to Phoenix. Of course I spoke up, and they proceeded to try to find my bag because I had to take a bus to the actual terminal to catch my flight. Which I was not informed of before I arrived. After another 15 minutes of searching, my bag was finally found with the first-class passengers' bags because they had pulled it by mistake. So I rushed to the terminal with the American representative to catch my flight, and they informed me that I missed it and could not get another flight until the next day. Of course, after being on an international flight for 18 hours, I was in no mood to hear this. Now, to be fair, there were a few American employees who tried to help me. After hearing about the missed flight, they got a supervisor to talk to. I expressed my situation to the supervisor, and she was not helpful until I asked for compensation. She agreed to get me a hotel room for the night. So I agreed, and she disappeared into her office, and I waited. And waited. And waited. And waited. While waiting, I was asked by three different employees who knew of my situation if I had been helped. I told them I was waiting for the supervisor to get the hotel room, and they said they would check. Finally, after waiting for 75 minutes, one of the employees who had asked me if I had been helped arrived with my hotel room and arranged a ride to the hotel for me. Never saw the supervisor again. It was now 8 o'clock; I arrived at 5:45! My rebooked fight was scheduled for 6:11 this morning and I have now been informed it has been delayed until 10:00. So am I happy with American? NO I'M NOT!! ;

Ontario airport boarding was very easy to park and access, is clean and TSA took 10 minutes total. Check-in was a breeze and cruise was very nice.

Good flight, seated and had a water within 5 minutes. Crew was hospitable.

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

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

VERY disappointed at the agent checking in my luggage. I know that the weight limit is 23 kg, a little over 50 pounds (50.71 pounds). Yet the agent kept repeating "50 pounds". So I said, the limit is 23 kg, and she had the audacity to say 'no, it is 22 kg!" Imagine my surprise. Was she ignorant or was she poorly trained? Not sure. The boarding process was pretty good. The speakers were loud enough so I still could hear them despite inconsiderate passengers continuing to speak while the announcements were going on. During the flight, the teenage girl sitting behind me kept pressing her feet to the back of my chair. I turned around several times, yet she did not get the hint. I did not make a fuss since I sense I had a bad streak that night with AA, so I just did the best I can to lean forward and not let that bother me.

It was wonderful upgrading to first. Plane was so cold thou. Crew was great. Wish there was a food option in first for such a long flight. Doesnt matter the time of day. Chintzy.

I booked tickets from San Diego to Cincinnati months in advance to attend my sister’s wedding, a wedding where I was serving as the officiant. At 10:00 PM the night before my 6:00 AM flight (just 8 hours before departure), I received an alert that my first leg to Denver was delayed, causing me to miss my connecting flight to Cincinnati. When I called Frontier customer service, they informed me that they couldn't get me on any other flight that would get me there in time for the Saturday wedding, let alone the rehearsal dinner. Because I had a critical role in the wedding, I was forced to buy a last-minute ticket on another airline for three times the original price, it costing me well over $1,000 extra. Even with the emergency flight, I still missed the rehearsal dinner entirely. When I spoke with Frontier, they agreed to refund my original ticket, but showed zero care or accountability for the massive financial burden and distress they caused. Their "compensation” for causing me to spend an extra $1,000+ and miss an irreplaceable family event? A $75 Frontier voucher. Frontier completely dropped the ball. Their customer service showed zero empathy letting me know that it was Frontier who was the real victim by refunding my ticket price, and their reliability is non-existent. I will never fly Frontier again, and I strongly advise anyone who actually needs to arrive at their destination on time for an important event to book with literally any other airline.

The takeoff was the smoothest I've ever experienced on any airline and this is the first time I've flown on frontier so this was an extremely pleasant surprise!

A lady asked to stop the flight after the tunnel pulled away and we began to depart a flight that was already hours late. The attendance respectfully stopped the the plane and had the tunnel return. After the tunnel returned the passenger claimed to have changed her mind . The tunnel was then put in reverse and the passenger remained on the plane .. They should have sent the sick passenger off the plane like initially replaced. They existed a couple off the plane prior to that situation.. So.. all and all.. it was a long and flight.. .

We understand and comply with Frontier’s bag sizes. We’ve had some problems in past while having to await other passengers who do not understand the baggage restrictions or have not prepaid and that is usually our biggest concern (others delaying us) with flying Frontier. Flying OUT of ONT, however, has always been a great experience. I’ve also noted even on delayed Frontier flights very knowledgeable pilots who manage expectations well.

Long lines, rude staff, everything that's offered you have to pay for.

The last time I flew Frontier was in the 1960s when it was a “real” airline. We flew this time because of the price & schedule. As the saying goes, you get what you pay for.

I appreciated the upgrade to free cary-on bag and seat selection at no charge

Flight was delayed on the runway for 40 minutes the crew did not even offer even water to passengers to compensate for the flight delayed. The flight was delayed due to aircraft mechanical issues. Worst customer service ever

This isna terribly run airlines. If you're one minute late, they will deny your ticket. Don't waste your time or money

Flight was delayed for more than 3 hours, crew at ONT airport was rude, and when we got to DFW the airplane had an issue landing, we had to be taxied to the terminal, and the luggage was hold until the next day.

More options for your flight from Ontario

Complete your trip to Worldwide with a hotel stay or car rental