$45 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 2/22. 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

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Find Cheap Flights from Ontario

Where can I fly from Ontario?Prices from ONT, departing Sat 1/10 and returning Sat 1/17

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

Sun, Jan 25 - Sat, Feb 7
Volaris Logo
11:02 pm - 12:05 pm
ONT
-
CUN
10h 03m1 stop
Volaris Logo
1:02 pm - 10:52 pm
CUN
-
ONT
12h 50m1 stop
$276Volaris
Fri, Jan 16 - Thu, Jan 22
Volaris Logo
11:02 pm - 12:05 pm
ONT
-
CUN
10h 03m1 stop
Volaris Logo
1:02 pm - 8:11 pm
CUN
-
ONT
10h 09m1 stop
$278Volaris
Sat, Jan 31 - Sat, Feb 7
Volaris Logo
12:42 am - 3:28 pm
ONT
-
CUN
11h 46m1 stop
Volaris Logo
1:02 pm - 8:11 pm
CUN
-
ONT
10h 09m1 stop
$280Volaris
Thu, Jan 8 - Thu, Jan 22
TAP AIR PORTUGAL Logo
4:45 pm - 11:30 pm
LAX
-
MAD
21h 45m1 stop
TAP AIR PORTUGAL Logo
7:40 am - 2:40 pm
MAD
-
LAX
16h 00m1 stop
$437TAP AIR PORTUGAL
Thu, Jan 8 - Thu, Jan 22
TAP AIR PORTUGAL Logo
4:45 pm - 11:30 pm
LAX
-
MAD
21h 45m1 stop
TAP AIR PORTUGAL Logo
7:40 am - 2:40 pm
MAD
-
LAX
16h 00m1 stop
$438TAP AIR PORTUGAL
Thu, Jan 29 - Wed, Feb 11
TAP AIR PORTUGAL Logo
4:45 pm - 2:05 pm
LAX
-
MAD
36h 20m1 stop
TAP AIR PORTUGAL Logo
6:00 pm - 2:40 pm
MAD
-
LAX
29h 40m1 stop
$439TAP AIR PORTUGAL
Sun, Jan 25 - Tue, Feb 24
ANA Logo
11:30 am - 4:30 pm
LAX
-
HND
12h 00mnonstop
ANA Logo
12:50 am - 5:50 pm
HND
-
LAX
10h 00mnonstop
$560ANA
Tue, Mar 31 - Sun, Apr 12
Scandinavian Airlines Logo
1:40 pm - 6:10 pm
LAX
-
BCN
19h 30m2 stops
Scandinavian Airlines Logo
12:20 pm - 4:50 pm
BCN
-
LAX
37h 30m2 stops
$564Scandinavian Airlines
Tue, Apr 28 - Tue, May 19
TAP AIR PORTUGAL Logo
4:45 pm - 1:30 am
LAX
-
BCN
23h 45m1 stop
TAP AIR PORTUGAL Logo
6:00 am - 2:45 pm
BCN
-
LAX
17h 45m1 stop
$566TAP AIR PORTUGAL
Sat, May 9 - Sun, May 24
TAP AIR PORTUGAL Logo
4:40 pm - 4:55 pm
LAX
-
BCN
15h 15m1 stop
TAP AIR PORTUGAL Logo
6:00 am - 1:55 pm
BCN
-
LAX
16h 55m1 stop
$567TAP AIR PORTUGAL

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

Thu, Jan 15 - Sun, Jan 18
Frontier Logo
6:10 am - 9:30 am
ONT
-
DEN
2h 20mnonstop
Frontier Logo
10:29 pm - 11:59 pm
DEN
-
ONT
2h 30mnonstop
$83Frontier
Fri, Jan 23 - Mon, Jan 26
Frontier Logo
6:20 am - 9:40 am
ONT
-
DEN
2h 20mnonstop
Frontier Logo
10:49 pm - 12:20 am
DEN
-
ONT
2h 31mnonstop
$84Frontier
Sun, Jan 18 - Thu, Jan 22
Frontier Logo
6:10 am - 9:30 am
ONT
-
DEN
2h 20mnonstop
Frontier Logo
10:49 pm - 12:20 am
DEN
-
ONT
2h 31mnonstop
$85Frontier
Fri, Jan 16 - Sun, Jan 18
Frontier Logo
6:39 pm - 8:16 pm
ONT
-
SFO
1h 37mnonstop
Frontier Logo
7:52 pm - 9:23 pm
SFO
-
ONT
1h 31mnonstop
$110Frontier
Sat, Jan 10 - Sun, Jan 11
Hawaiian Airlines Logo
11:53 am - 2:44 pm
ONT
-
SEA
2h 51mnonstop
Hawaiian Airlines Logo
8:15 am - 10:59 am
SEA
-
ONT
2h 44mnonstop
$123Hawaiian Airlines
Mon, Feb 2 - Fri, Feb 6
Multiple Airlines Logo
3:36 pm - 5:54 pm
ONT
-
EWR
23h 18m1 stop
Multiple Airlines Logo
10:30 pm - 11:24 pm
EWR
-
ONT
27h 54m2 stops
$192Multiple Airlines
Thu, Feb 19 - Wed, Feb 25
Multiple Airlines Logo
2:06 pm - 5:54 pm
ONT
-
EWR
24h 48m1 stop
Multiple Airlines Logo
4:00 pm - 2:29 pm
EWR
-
ONT
25h 29m1 stop
$209Multiple Airlines
Tue, Jan 13 - Tue, Jan 20
American Airlines Logo
10:58 am - 6:06 pm
ONT
-
HOU
5h 08m1 stop
American Airlines Logo
12:47 pm - 10:48 pm
HOU
-
ONT
12h 01m1 stop
$319American Airlines
Tue, Jan 13 - Tue, Jan 20
American Airlines Logo
12:57 pm - 10:46 pm
ONT
-
HOU
7h 49m2 stops
American Airlines Logo
10:35 am - 6:45 pm
HOU
-
ONT
10h 10m1 stop
$324American Airlines
Sat, Jan 10 - Mon, Jan 12
Southwest Logo
5:00 am - 10:00 am
ONT
-
HOU
3h 00mnonstop
Southwest Logo
3:35 pm - 5:10 pm
HOU
-
ONT
3h 35mnonstop
$333Southwest
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 San Francisco (9%) and Dallas (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 Cancún, Manila and Mexico City.

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 (58% of total searches). The next most popular destinations are Mexico (36%) and El Salvador (6%).

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 Portland, Honolulu, Denver, Seattle and Houston. On average, the cheapest of these destinations on KAYAK over the last 2 weeks for a return flight was Seattle at $162, while the most expensive was Houston, at $683.

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, Morelia and San Salvador. On average, the cheapest of these destinations on KAYAK over the last 2 weeks for a return flight was Morelia at $131, while the most expensive was Taipei City, at $493.

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 40m. The next longest is Honolulu at 6h 13m, followed by a flight to New York at 5h 25m.

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 José del Cabo and cost $39. The next cheapest destinations were Morelia at $40 and Seattle at $47.

Good to know

Low seasonNovember
Cheapest flight$45
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly with an average 5% increase in price.
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 
FraxysFlew with American Airlines
ONT
-
DFW
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
ONT
-
LAS
Dec 2024
Pack light and arrive earlier.. Also download the App and check your flight and check in..
LeoFlew with American Airlines
ONT
-
CLT
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
ONT
-
CLT
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 $104 one-way - $183 round-trip; Dallas $178 one-way - $258 round-trip; Taipei City $426 one-way - $679 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.
8.2
China AirlinesOverall score based on 788 reviews
7.8Food
8.3Boarding
8.0Entertainment
8.5Crew
8.0Comfort
Airline reviews

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

8.0 ExcellentAnonymous, Oct 2025
SEA - 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. :)

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

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.

from SFO-> FRA flight, AVML meal was significantly less compared to regular meal, especially no Desert, no Bread, no sides.

This was an older airplane. The cabin was constantly warm to hot throughout the 10 hour flight and there were no vents to personalize air flow. Also since it was an older plane, the material and comfort of the chairs were very uncomfortable. I left my flight with major soreness on my tailbone.

Older aircraft, no meal, only food was for purchase. Not impressed United.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

My experience on this United Airlines flight was highly uncomfortable, primarily due to two issues: Cabin Temperature: The temperature on the Boeing 737 MAX 8 was unacceptably high, feeling consistently around 80 degrees throughout the flight. This made sleeping impossible and significantly detracted from the experience. Seating Arrangement: Being stuck in a middle seat for a six-and-a-half-hour overnight flight compounded the discomfort. Moving forward, I will always purchase a seat assignment to avoid this situation.

Premium Plus is a really good idea for longer flights

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.

Horrible. Both legs of my flight were delayed more than 6 hours. No compensation, no screens on the plane, and the plane was not clean.

The flight was smooth, the pilot kept us informed about delays and we arrived more of less on time

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.

Not clean and was told I would get a great seat and it was not great at all

Flight got delayed for 5 hours no good explanation was offered ;(

Horrible. I would never fly Frontier again. The booking process is tricky at best, but fraudulent in my opinion. Frontier customer service did nothing to rectify my purchase -- I ended up paying more than double what I could have gotten from other airlines and nearly triple what I thought I was buying from Frontier. Their booking practices are unfair to the consumer.

Delayed. Text notifications were slow. Not much information o what was happening. Boarding was slow and confusing. Wasn’t even offered water other flight. Had to ask. No entertainment at all. Felt like.a Greyhound bus.

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

Better than expected. Staff were friendly and nice on both flights.

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.

Everything you need to know for your flight from Ontario

Information on your arrival and departure airports