$31 Find Deals on Flights from 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 Ontario to Worldwide departing on 11/3. 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

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Find Cheap Flights from Ontario

Where can I fly from Ontario?Prices from ONT, departing Sat 10/18 and returning Sat 10/25

Book Cheap International Flights from Ontario

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

Mon, Oct 20 - Fri, Oct 24
Multiple Airlines Logo
12:37 am - 2:58 pmLAX-CUN
12h 21m1 stop
Multiple Airlines Logo
10:22 am - 11:48 pmCUN-LAX
15h 26m1 stop
$276Multiple Airlines
Find Deal
Sat, Nov 15 - Sat, Nov 22
American Airlines Logo
12:45 am - 12:15 pmLAX-CUN
8h 30m1 stop
American Airlines Logo
9:00 am - 11:30 amCUN-LAX
5h 30mnonstop
$277American Airlines
Find Deal
Tue, Sep 30 - Tue, Oct 7
Multiple Airlines Logo
11:34 am - 9:49 pmLAX-CUN
8h 15m1 stop
Multiple Airlines Logo
9:52 am - 4:14 pmCUN-LAX
8h 22m1 stop
$278Multiple Airlines
Find Deal
Wed, Jan 14 - Wed, Jan 21
Iberia Logo
10:36 am - 8:50 amLAX-MAD
13h 14m1 stop
Iberia Logo
12:50 pm - 4:35 pmMAD-LAX
12h 45mnonstop
$419Iberia
Find Deal
Sun, Oct 12 - Thu, Oct 23
Multiple Airlines Logo
7:30 am - 8:20 amLAX-MAD
15h 50m1 stop
Multiple Airlines Logo
10:05 am - 4:30 pmMAD-LAX
15h 25m1 stop
$420Multiple Airlines
Find Deal
Mon, Oct 6 - Fri, Oct 31
Multiple Airlines Logo
7:30 am - 8:20 amLAX-MAD
15h 50m1 stop
Multiple Airlines Logo
10:10 am - 5:35 pmMAD-LAX
15h 25m1 stop
$421Multiple Airlines
Find Deal
Wed, Mar 4 - Mon, Mar 16
Scandinavian Airlines Logo
6:55 pm - 6:20 pmLAX-BCN
38h 25m2 stops
Scandinavian Airlines Logo
7:10 pm - 6:00 pmBCN-LAX
30h 50m1 stop
$479Scandinavian Airlines
Find Deal
Sun, Feb 22 - Thu, Feb 26
Iberia Logo
7:55 pm - 4:25 pmLAX-BCN
11h 30mnonstop
Iberia Logo
2:00 pm - 6:05 pmBCN-LAX
13h 05mnonstop
$480Iberia
Find Deal
Sun, Nov 9 - Sun, Nov 23
Iberia Logo
7:55 pm - 4:25 pmLAX-BCN
11h 30mnonstop
Iberia Logo
3:05 pm - 7:10 pmBCN-LAX
13h 05mnonstop
$481Iberia
Find Deal
Mon, Oct 20 - Tue, Oct 21
Multiple Airlines Logo
2:30 pm - 8:20 pmLAX-BVA
20h 50m1 stop
Multiple Airlines Logo
11:00 pm - 3:30 pmBVA-LAX
25h 30m2 stops
$544Multiple Airlines
Find Deal

Book Cheap Domestic Flights from Ontario

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

Mon, Sep 29 - Wed, Oct 1
Frontier Logo
2:45 pm - 4:00 pmONT-LAS
1h 15mnonstop
Frontier Logo
8:49 pm - 9:56 pmLAS-ONT
1h 07mnonstop
$58Frontier
Find Deal
Tue, Sep 30 - Wed, Oct 1
Frontier Logo
8:00 am - 9:11 amONT-LAS
1h 11mnonstop
Frontier Logo
8:49 pm - 9:56 pmLAS-ONT
1h 07mnonstop
$59Frontier
Find Deal
Tue, Oct 14 - Tue, Oct 14
Frontier Logo
8:00 am - 9:12 amONT-LAS
1h 12mnonstop
Frontier Logo
7:33 pm - 8:42 pmLAS-ONT
1h 09mnonstop
$61Frontier
Find Deal
Fri, Oct 10 - Mon, Oct 13
Frontier Logo
6:53 am - 10:18 amONT-DEN
2h 25mnonstop
Frontier Logo
10:29 pm - 11:50 pmDEN-ONT
2h 21mnonstop
$67Frontier
Find Deal
Wed, Oct 15 - Mon, Oct 20
United Airlines Logo
1:53 pm - 3:11 pmONT-SFO
1h 18mnonstop
United Airlines Logo
9:30 pm - 10:52 pmSFO-ONT
1h 22mnonstop
$77United Airlines
Find Deal
Thu, Dec 4 - Mon, Dec 8
Southwest Logo
5:25 am - 10:25 amONT-HOU
3h 00mnonstop
Southwest Logo
5:45 pm - 7:15 pmHOU-ONT
3h 30mnonstop
$211Southwest
Find Deal
Fri, Oct 17 - Sun, Oct 19
Southwest Logo
5:55 pm - 12:35 amONT-HOU
4h 40m1 stop
Southwest Logo
2:30 pm - 3:50 pmHOU-ONT
3h 20mnonstop
$221Southwest
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Sat, Feb 14 - Sat, Feb 21
American Airlines Logo
11:55 pm - 11:23 amONT-EWR
8h 28m1 stop
American Airlines Logo
1:42 pm - 8:24 pmEWR-ONT
9h 42m1 stop
$229American Airlines
Find Deal
Sat, Nov 1 - Wed, Nov 5
Alaska Airlines Logo
4:11 pm - 6:59 amONT-EWR
11h 48m1 stop
Alaska Airlines Logo
7:30 am - 3:17 pmEWR-ONT
10h 47m1 stop
$230Alaska Airlines
Find Deal
Sun, Nov 9 - Wed, Nov 12
Alaska Airlines Logo
9:45 am - 1:48 pmONT-HNL
6h 03mnonstop
Alaska Airlines Logo
9:40 am - 5:14 pmHNL-ONT
5h 34mnonstop
$381Alaska Airlines
Find Deal
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?

The domestic destinations KAYAK users have most searched for when searching for flights from Ontario.
Based on KAYAK flight searches, the most popular place to fly from Ontario is New York (16% of total searches). The next most popular destinations are Seattle/Tacoma Intl (11%) and San Francisco (7%).

What are the most popular international flights out of Ontario?

The international destinations KAYAK users have most searched for when searching for flights from Ontario.
There are many international destinations you can fly to from Ontario. The most popular international destinations among KAYAK users are Paris, Cancún and Guadalajara.

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

The most popular countries KAYAK users have searched for from Ontario along with the average round-trip price for the route clicked by KAYAK users in the last 2 weeks.
Based on KAYAK flight searches, the most popular country to fly to from Ontario is Taiwan (49% of total searches). The next most popular destinations are Mexico (41%) and El Salvador (10%).

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 Denver at $135, while the most expensive was San Jose, at $326.

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, San José del Cabo, Guadalajara, León and San Salvador. On average, the cheapest of these destinations on KAYAK over the last 2 weeks for a return flight was León at $128, while the most expensive was Taipei City, at $566.

What is the longest direct flight from Ontario?

The longest direct flight you can take from Ontario is to Taipei City Taiwan Taoyuan Intl Airport, with a duration of 14h 05m. The next longest is Honolulu at 6h 01m, followed by a flight to New York at 5h 22m.

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 Las Vegas and cost $30. The next cheapest destinations were Portland at $32 and Oakland at $38.

Good to know

Low seasonFebruary
Cheapest flight$31
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly and prices are also 13% lower on average.
Flight from Ontario to Las Vegas

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

Insights shared by verified travelers who flew from Ontario to anywhere 
FraxysFlew with American AirlinesONT-DFWJun 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 FrontierONT-LASDec 2024
Pack light and arrive earlier.. Also download the App and check your flight and check in..
LeoFlew with American AirlinesONT-CLTSep 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 AirlinesONT-CLTJan 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 $121 one-way - $168 round-trip; Dallas $156 one-way - $250 round-trip; Las Vegas $70 one-way - $99 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 768 reviews
8.0Comfort
8.5Crew
8.0Entertainment
8.3Boarding
7.8Food
Airline reviews

The flat bed full lying position is not comfortable at all, this could be improved, it is at an awkward position which i dont have the same issues with other airlines business class.

10.0 ExcellentRains, Sep 2025BNE - TPE
Read more China Airlines reviews

The flat bed full lying position is not comfortable at all, this could be improved, it is at an awkward position which i dont have the same issues with other airlines business class.

The flight was uneventful and the crew was kind and professional. Really appreciate the option to order a vegan meal for the flight!

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

I absolutely loved my flight from Taipei to LAX. I was originally assigned to a different seat, however one of the stewardess noticed I was uncomfortable in my seat. She offered to move me to a more comfortable setting. Although she didn’t have to do what she did, I am more than grateful and thankful for her doing so. My longer flight felt much more comfortable, just by her taking notice. I really appreciate her.

Overall was a lovely experience. The crew were kind and courteous throughout the entire flight.

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

They need to improve on how the plane lands cause it was not smooth at all.

I did not like how the plane landed. It was not smooth.

Been flying with China Airline over years many times. Good experience with them, no issues.

China Airlines crews are very excellent doing their job. Very friendly and hardworking. I will always choose China Airlines over and over. Thank you all for making my flight comfortable. God bless to all the staff. :)

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

No trays in our seats, we sat in first row, purchased a business class fare. Had to hold our drinks and snack in our hands. No plugs for our cell phones. Had to pay for it a drink cocktail each. Seats so uncomfortable.

Flight wasn’t even full, but too many carry-ons caused us to run out of bin space. New bag fee has folks who would usually check their bags carrying on. Watching Southwest morph into Spirit/Frontier is so sad to watch

Southwest is Southwest. No frills. If you're luck enough to get a happy crew (we did), then it makes for a nicer flight.

It was a perfect flight in all aspects! Both legs!

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

I liked the crew member who gave flight instructions on "in case of a problem:. The seats are so small that only a young teenager could sit in middle seat.

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

From the first moment you interact with United Airlines, you can expect nothing less but extreme frustration. The baggage handler at the bag drop seems completely unbothered by the presence of customers waiting in line. No help was extended to load the baggage whatsoever. And if any of your bags is overweight by 0.01 pound they will make you re-distribute everything in your suitcase just to play power trip. When it was time to board no help was extended to customers to locate their seats. Moreover. It was a chaotic mess at the gate when it was unclear who should board first and everyone just bunched up, trying to get on the plane. I am sure the crew was doing their best to perform their jobs while being paid their wages however it shouldn’t be that hard to smile once or twice when you’re in the business if serving customers. It is a shame for the United States of America to have a flagship carrier of such low caliber. Our flight was also delayed by about an hour and a half due to further delays prior to our inbound flight. Being someone who has travelled for both business and leisure in Asia, Europe, and South America I have never experienced such poor quality of service.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

The pilots were late and it made us 1 hour late. The meat was tough and bok choy was also tough.

Stuck on tarmac for two hours plus a 5.5 hour flight. Rude flight attendant. And no meals, not even for purchase!

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

The best airline I have ever travel , really good customer service, attention and service !!

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

Not a great experience. We paid for the upgrade for premium economy seats and seated ourselves in very comfortable seats. Someone came along with the same seat on their boarding pass. The aircraft had been changed and as a result we were booted out and sent further back to small uncomfortable seats. After complaining we were moved to emergency row seats, which gave us more leg room but the seats don’t recline. For people in our 70’s we found having to sit upright from California to NJ very uncomfortable. Not sure why they chose to move senior citizens instead of the two people that were allowed to take the more comfortable seats. Not happy.

Everything was great. Only thing that could’ve made it better was buy on board options for hot food, but the snacks were decent. The flight attendants were great. I had no complaints. I was able to make it to my destination safely

The entertainment package was vast and the selections were very current. Keep updating it was great.

The seat was so hard my tailbone was aching The crew was kind of a b**** because I made a joke that I didn't care if they close the door I total c*** when she was trying to f****** act like she was mad at me because I said that The flight was bumpy. Sure you didnt have control over that.

4 hours late, including over +1 hour waiting in plane to take off. Baggage left behind too.

While waiting to claim my checked luggage, I discovered the airline had lost it. After a long wait and inquiries, I discovered it was on another flight. Fortunately, the airline finally sent my luggage home.

Was not able to watch most shows on the entertainment site. They would not load

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Delayed flight, so I switched fights to SFO to Phoenix , Phoenix to DSM. Excellent service through American Airlines

AA re-routed flight from HNL to LAX due to delay. My group of 3 with reserved seats in row 9 was broken up, with one assigned to a middle seat, another in the last row of the plane. Not happy. No explanation to the delay. No apologies. No compensation. Would have been nice to be offered an Admiral Club admission or a voucher for the extra 3 hours of layover in LAX. Could not hear the boarding gate announcements in LAX. Adjacent gate was boarding at the same time. Loud speakers were competing against each other. Barely made my boarding group.

Almost a 6 hour flight and the only food option is a cheese plate… and chips. Also how is it there are no options for texting on American. I’ll be going back to delta and united.

Bad food, small seats that didn’t recline. I thought I was buying a quantas ticket so I feel like I got scammed

Seats were new and comfortable. Staff was fine. Missed my connection due to weather -which wasn’t their fault- but got no help at all. Gate staff sent me to customer service, which was and stayed unstaffed. Sign with QR code directed me to call or chat. Chat was useless. Call was returned after an hour. No itinerary offered by Frontier could get me home in less than 30 hours. Rebooked with another airline and got a partial refund that came to about 10 percent of what I paid to get home.

Finally a Frontier on time and efficient. I've had problems before with your airline, but this time everything went fine.

The experience was good. No frills but I got there safe and sound and on time.

Great for the price. No wifi or entertainment, but gate agents and crew were fantastic and we boarded quickly and left on time.

sluggish boarding and arrival procedures, fake nice flight attendants, and lots of delays.

Disaster. They lied every step of the way. We ended up being delayed due to crew and then allegedly abandoned the flight because of a curfew at LGA. No rebooking to LGA at any reasonable time. No hotel. No meal vouchers. Had to sleep in the airport and fly to Newark instead. Will never fly Frontier again.

Cancelled flight after I arrived at airport after 75 min drive and parking. Next flight was 4 days in the future. Had to scramble and buy a much more expensive flight on another carrier.

I liked the turn-style feature at gate 209B at LAX. Very efficient process. The gate staff also made several, clearly directed announcements so I felt very informed.

The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.

It was a short flight so no food or entertainment….

Everything you need to know for your flight from Ontario

Information on your arrival and departure airports

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