$29 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 2/25. 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 cheap international flights from Ontario

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Find Cheap Flights from Ontario

Where can I fly from Ontario?Prices from ONT, departing Thu 11/27 and returning Thu 12/4

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

Sat, Nov 15 - Wed, Nov 19
Spirit Airlines Logo
1:30 pm - 11:36 amBUR-CUN
19h 06m2 stops
Spirit Airlines Logo
12:31 pm - 7:19 amCUN-BUR
21h 48m2 stops
$280Spirit Airlines
Find Deal
Tue, Feb 24 - Wed, Mar 4
Volaris Logo
12:35 am - 12:10 pmLAX-CUN
8h 35m1 stop
Volaris Logo
10:43 am - 10:00 pmCUN-LAX
14h 17m1 stop
$297Volaris
Find Deal
Sun, Feb 8 - Thu, Feb 19
Delta Logo
9:55 pm - 11:15 amLAX-CUN
10h 20m1 stop
Delta Logo
5:10 pm - 11:57 pmCUN-LAX
9h 47m1 stop
$298Delta
Find Deal
Mon, Dec 8 - Wed, Dec 24
Delta Logo
10:25 pm - 8:00 amONT-MAD
24h 35m2 stops
Delta Logo
11:15 am - 10:00 amMAD-ONT
31h 45m1 stop
$430Delta
Find Deal
Tue, Dec 30 - Thu, Jan 15
Finnair Logo
6:50 pm - 8:05 pmLAX-MAD
16h 15m1 stop
Finnair Logo
6:40 am - 7:10 pmMAD-LAX
21h 30m1 stop
$431Finnair
Find Deal
Mon, Nov 24 - Wed, Dec 3
British Airways Logo
9:00 pm - 9:45 amLAX-MAD
27h 45m1 stop
British Airways Logo
12:50 pm - 1:30 pmMAD-LAX
33h 40m1 stop
$432British Airways
Find Deal
Sun, Jan 25 - Tue, Feb 10
Iberia Logo
6:10 pm - 5:10 pmLAX-BCN
14h 00m1 stop
Iberia Logo
9:15 pm - 4:35 pmBCN-LAX
28h 20m1 stop
$516Iberia
Find Deal
Sun, Mar 8 - Tue, Mar 17
Scandinavian Airlines Logo
8:30 pm - 6:20 pmLAX-BCN
37h 50m1 stop
Scandinavian Airlines Logo
7:10 pm - 6:00 pmBCN-LAX
30h 50m1 stop
$518Scandinavian Airlines
Find Deal
Thu, Dec 4 - Thu, Dec 11
Scandinavian Airlines Logo
9:20 pm - 6:20 pmLAX-BCN
36h 00m2 stops
Scandinavian Airlines Logo
7:10 pm - 10:39 pmBCN-LAX
36h 29m2 stops
$519Scandinavian Airlines
Find Deal
Sun, Jan 25 - Mon, Feb 2
China Southern Logo
10:00 pm - 8:00 pmLAX-HND
29h 00m1 stop
China Southern Logo
3:05 pm - 6:30 pmHND-LAX
20h 25m1 stop
$579China Southern
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

Tue, Dec 9 - Wed, Dec 17
Frontier Logo
6:15 am - 7:22 amONT-LAS
1h 07mnonstop
Frontier Logo
8:13 pm - 9:17 pmLAS-ONT
1h 04mnonstop
$57Frontier
Find Deal
Wed, Dec 10 - Wed, Dec 17
Frontier Logo
6:15 am - 7:22 amONT-LAS
1h 07mnonstop
Frontier Logo
8:13 pm - 9:17 pmLAS-ONT
1h 04mnonstop
$58Frontier
Find Deal
Sun, Dec 14 - Wed, Jan 7
Frontier Logo
6:15 am - 7:22 amONT-LAS
1h 07mnonstop
Frontier Logo
7:05 pm - 8:13 pmLAS-ONT
1h 08mnonstop
$59Frontier
Find Deal
Fri, Dec 5 - Sun, Dec 7
Frontier Logo
10:12 pm - 11:52 pmONT-SFO
1h 40mnonstop
Frontier Logo
10:03 pm - 11:31 pmSFO-ONT
1h 28mnonstop
$74Frontier
Find Deal
Thu, Jan 8 - Mon, Jan 12
Frontier Logo
10:12 pm - 11:52 pmONT-SFO
1h 40mnonstop
Frontier Logo
10:03 pm - 11:31 pmSFO-ONT
1h 28mnonstop
$78Frontier
Find Deal
Mon, Nov 10 - Fri, Nov 14
Frontier Logo
10:42 pm - 12:11 amONT-SFO
1h 29mnonstop
Frontier Logo
10:21 pm - 11:50 pmSFO-ONT
1h 29mnonstop
$80Frontier
Find Deal
Sat, Nov 15 - Mon, Nov 17
Frontier Logo
12:05 pm - 3:34 pmONT-DEN
2h 29mnonstop
Frontier Logo
9:48 am - 11:10 amDEN-ONT
2h 22mnonstop
$92Frontier
Find Deal
Sat, Nov 15 - Tue, Nov 18
Frontier Logo
6:53 am - 10:18 amONT-DEN
2h 25mnonstop
Frontier Logo
8:05 pm - 9:27 pmDEN-ONT
2h 22mnonstop
$93Frontier
Find Deal
Wed, Nov 12 - Sat, Nov 15
Multiple Airlines Logo
8:45 am - 10:01 amONT-ORD
23h 16m2 stops
Multiple Airlines Logo
7:15 am - 11:50 pmORD-ONT
18h 35m1 stop
$164Multiple Airlines
Find Deal
Sat, Feb 14 - Wed, Feb 18
American Airlines Logo
6:15 am - 4:42 pmONT-EWR
7h 27m1 stop
American Airlines Logo
12:50 pm - 6:40 pmEWR-ONT
8h 50m1 stop
$217American 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 (12% of total searches). The next most popular destinations are Dallas (10%) and Seattle/Tacoma Intl (8%).

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 Taipei City, Guadalajara and Manila.

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 (53% of total searches). The next most popular destinations are Mexico (40%) and El Salvador (7%).

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 Phoenix, Portland, Honolulu, Salt Lake City and Denver. On average, the cheapest of these destinations on KAYAK over the last 2 weeks for a return flight was Denver at $151, while the most expensive was Salt Lake City, 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, San José del Cabo, Guadalajara and León. 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 $580.

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 5h 58m, 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 $36. The next cheapest destinations were San Francisco at $39 and San José del Cabo at $43.

Good to know

Low seasonFebruary
Cheapest flight$29
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 9% 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 $110 one-way - $183 round-trip; Las Vegas $80 one-way - $114 round-trip; Taipei City $412 one-way - $720 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 776 reviews
8.3Boarding
8.5Crew
8.0Entertainment
8.0Comfort
7.8Food
Airline reviews

We are glad to have used China Airlines for our trip. Continue the good service! Thank you!

8.0 ExcellentAnonymous, Oct 2025SEA - TPE
Read more China Airlines reviews

We are glad to have used China Airlines for our trip. Continue the good service! Thank you!

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. :)

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

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.

Same as last comment. Food sucks. Quality. Not surprising most people have no clue about nourishment Clearly

The flight attendants were great, I joked with one I can’t remember her name, a blond, really sweet. I thought it was run well very professional. This was great i survived Spirit, I know for which I speak.

We were in business class. the angled seats in that class do not have a real window view & the placement of the controls are bad. But we knew that. But the food options were mediocre. The taste was fine, but the size was for a child. It’s just really feels like United is skimping on everything. Even when we were in the Polaris lounge they did not have diet sodas. They said they were out no Coke zero no Diet Coke, etc. I do not think the portion of nuts they serve on the plane could get any smaller. Really a minimal service and offer for what you’re paying for in business.

I was in first class. The outlets at my seat did not work. The plane was shabby and run down. I had prepurchsed a day subscription for internet that was not redeemable. I had to repurchase the internet for my flight and then it didn’t work anyway. Quite disappointed in what was supposed to be the launch of a great vacation.

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 flight was flawless and we even arrived between 20 and 25 minutes early!

Always seated jammed in rear of aircraft Admirals Club food at DFW terminal D was absolute worst food experience and I pay $600/year to eat this dried out junk

Mostly good. Flight was crowded but Airline personnel were very friendly & accommodating. It would be good to have savory snacks rather than just sweet Biscoff cookies.

It was a red eye flight, so no meals were provided, but it was fine with snacks. The seats felt cramped and almost too narrow.

Very crowded flight but what can you expect these days?? Crew was accommodating.

The seats in economy were appeared to be quite thin and lack sufficient cushioning to be comfortable. Perhaps it was my seating position but the plane seemed notably load.

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.

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

Boarding was on time and plane departed as scheduled. There are obviously no amenities (food, drink, entertainment) on Frontier, but there also didn't seem to be any issues with luggage space either.

Inbound plane was on time and flight departed on time with no issues while boarding.

This airline sucks. They offer low rates then charge you for everything, the app does not work well, the seats are the most uncomfortable. Maintenance issues on the flight, and you still have to sit through their credit card commercials. People are nice enough but does not make up for overall poor experience.

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….

Frontier had yet another flight cancellation. Have never made a complete round trip with this airline without at least one leg getting cancelled. Miserable flights - dirty, uncomfortable planes that apparently always have issues since I've had multiple delays and cancellations with them.

Flight was delayed 3 times, would have been nice to have received text message instead of email notifications. Frontier app wasn’t even updated accordingly, no gate number disclosed. No agent at front desk of gate to inform of delay. Very confused and left if the dark

Everything you need to know for your flight from Ontario

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.