$46 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 7/13. 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 Thu 5/28 and returning Thu 6/4

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

Sun, May 17 - Sat, May 23
Multiple Airlines Logo
9:36 pm - 11:54 am
ONT
-
CUN
12h 18m
1 stop
Multiple Airlines Logo
3:39 pm - 11:49 pm
CUN
-
ONT
10h 10m
1 stop
$295Multiple Airlines
Mon, May 18 - Sat, May 23
Multiple Airlines Logo
12:55 am - 1:41 pm
ONT
-
CUN
10h 46m
1 stop
Multiple Airlines Logo
3:39 pm - 11:49 pm
CUN
-
ONT
10h 10m
1 stop
$305Multiple Airlines
Mon, May 18 - Sat, May 23
Multiple Airlines Logo
12:55 am - 1:41 pm
ONT
-
CUN
10h 46m
1 stop
Multiple Airlines Logo
1:14 pm - 7:08 am
CUN
-
ONT
19h 54m
1 stop
$311Multiple Airlines
Sat, Oct 24 - Tue, Nov 3
LEVEL Logo
8:55 pm - 4:35 pm
LAX
-
BCN
11h 40mnonstop
LEVEL Logo
2:05 pm - 6:10 pm
BCN
-
LAX
13h 05mnonstop
$613LEVEL
Mon, Sep 14 - Fri, Sep 25
LEVEL Logo
8:55 pm - 5:35 pm
LAX
-
BCN
11h 40mnonstop
LEVEL Logo
2:00 pm - 6:05 pm
BCN
-
LAX
13h 05mnonstop
$614LEVEL
Mon, Sep 14 - Sat, Sep 26
Iberia Logo
8:55 pm - 5:35 pm
LAX
-
BCN
11h 40mnonstop
Iberia Logo
3:05 pm - 7:10 pm
BCN
-
LAX
13h 05mnonstop
$621Iberia
Tue, Sep 8 - Fri, Sep 18
TAP AIR PORTUGAL Logo
4:45 pm - 9:25 pm
LAX
-
MAD
19h 40m
1 stop
TAP AIR PORTUGAL Logo
7:40 am - 2:35 pm
MAD
-
LAX
15h 55m
1 stop
$650TAP AIR PORTUGAL
Sun, Sep 20 - Mon, Oct 5
Royal Air Maroc Logo
10:20 am - 7:10 pm
LAX
-
MAD
23h 50m
1 stop
Royal Air Maroc Logo
8:10 pm - 8:20 am
MAD
-
LAX
21h 10m
1 stop
$658Royal Air Maroc
Mon, Aug 17 - Wed, Sep 30
Singapore Airlines Logo
12:05 am - 7:00 pm
LAX
-
BKK
28h 55m
1 stop
Singapore Airlines Logo
1:35 pm - 7:40 pm
BKK
-
LAX
20h 05m
1 stop
$660Singapore Airlines
Sat, Sep 19 - Sun, Sep 27
LEVEL Logo
8:55 pm - 3:00 pm
LAX
-
MAD
33h 05m
1 stop
LEVEL Logo
8:00 pm - 7:10 pm
MAD
-
LAX
32h 10m
1 stop
$660LEVEL

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

Wed, Jun 3 - Mon, Jun 8
Frontier Logo
1:39 pm - 2:49 pm
ONT
-
LAS
1h 10mnonstop
Frontier Logo
6:22 pm - 7:32 pm
LAS
-
ONT
1h 10mnonstop
$74Frontier
Sat, May 23 - Sat, May 30
Frontier Logo
3:30 pm - 4:43 pm
ONT
-
LAS
1h 13mnonstop
Frontier Logo
7:00 am - 8:04 am
LAS
-
ONT
1h 04mnonstop
$75Frontier
Sun, Jul 12 - Wed, Jul 15
Frontier Logo
3:34 pm - 4:46 pm
ONT
-
LAS
1h 12mnonstop
Frontier Logo
6:40 pm - 7:48 pm
LAS
-
ONT
1h 08mnonstop
$76Frontier
Fri, May 8 - Mon, May 11
American Airlines Logo
7:35 pm - 7:00 am
ONT
-
JFK
8h 25m
1 stop
American Airlines Logo
2:30 pm - 9:59 pm
JFK
-
ONT
10h 29m
2 stops
$281American Airlines
Tue, Aug 25 - Wed, Sep 2
Delta Logo
10:59 pm - 9:45 am
ONT
-
LGA
7h 46m
1 stop
Delta Logo
1:00 pm - 6:01 pm
LGA
-
ONT
8h 01m
1 stop
$281Delta
Fri, Aug 7 - Wed, Aug 12
Delta Logo
10:00 pm - 10:41 am
ONT
-
LGA
9h 41m
1 stop
Delta Logo
1:45 pm - 9:56 pm
LGA
-
ONT
11h 11m
2 stops
$282Delta
Fri, May 8 - Tue, May 12
American Airlines Logo
11:59 pm - 1:28 pm
ONT
-
JFK
10h 29m
2 stops
American Airlines Logo
11:00 am - 6:24 pm
JFK
-
ONT
10h 24m
2 stops
$286American Airlines
Sat, May 23 - Fri, May 29
JetBlue Logo
10:41 pm - 7:10 am
ONT
-
JFK
5h 29mnonstop
JetBlue Logo
5:30 pm - 8:47 pm
JFK
-
ONT
6h 17mnonstop
$291JetBlue
Mon, Aug 31 - Wed, Sep 9
Southwest Logo
8:00 am - 10:40 am
ONT
-
HNL
5h 40mnonstop
Southwest Logo
8:15 am - 6:25 pm
HNL
-
ONT
7h 10m
1 stop
$330Southwest
Mon, Aug 31 - Wed, Sep 9
Southwest Logo
1:15 pm - 9:20 pm
ONT
-
HNL
11h 05m
2 stops
Southwest Logo
11:55 am - 8:10 pm
HNL
-
ONT
5h 15mnonstop
$335Southwest
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 Honolulu (28% of total searches). The next most popular destinations are New York (10%) and San Francisco (6%).

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 Manila, London 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 (57% of total searches). The next most popular destinations are Mexico (35%) 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 Salt Lake City. 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 Chicago, 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, Guadalajara, Morelia, León and San Salvador. On average, the cheapest of these destinations on KAYAK over the last 2 weeks for a return flight was Morelia at $179, while the most expensive was Taipei City, at $780.

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 Houston at $53 and Las Vegas at $62.

Good to know

Low seasonJanuary
Cheapest flight$44
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 4% increase in price.
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 
Verified travelerFlew with Alaska Airlines
ONT
-
PDX
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
ONT
-
PHX
Apr 2026
Check on your flight status often, as things can change and you may not be notified promptly
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 $134 one-way - $232 round-trip; Dallas $154 one-way - $318 round-trip; Taipei City $485 one-way - $862 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 819 reviews
8.0Entertainment
8.3Boarding
8.0Comfort
7.8Food
8.5Crew
Airline reviews

We boarded late and it snowballed from there. Had to wait behind 6 other flights to take off before us. Then, arriving late to our destination, we had to circle in the air for 20 minutes. If that's not enough, the seats are very cramped on their iteration if the A321neo. I'm 6"3' tall and my knees were pressed against the seat in front of me. These are not the slimline seats that offer less cushion with more leg room. I had no room to move my legs. Since I am an adult male, I also had no shoulder room. I sat on an aisle seat to have some space to lean my should out. But the walkway seemed to be more narrow than I am used to see. I felt bad for the middle passenger because there was just no where for me to put my shoulders except into the middle seat person. I don't plan to fly in this airline again in this configuration. Pack everyone in and lose my business.

2.0 MediocreMark, Apr 2026
TPE - FUK
Read more China Airlines reviews

We boarded late and it snowballed from there. Had to wait behind 6 other flights to take off before us. Then, arriving late to our destination, we had to circle in the air for 20 minutes. If that's not enough, the seats are very cramped on their iteration if the A321neo. I'm 6"3' tall and my knees were pressed against the seat in front of me. These are not the slimline seats that offer less cushion with more leg room. I had no room to move my legs. Since I am an adult male, I also had no shoulder room. I sat on an aisle seat to have some space to lean my should out. But the walkway seemed to be more narrow than I am used to see. I felt bad for the middle passenger because there was just no where for me to put my shoulders except into the middle seat person. I don't plan to fly in this airline again in this configuration. Pack everyone in and lose my business.

Everything was fine except the seats were quite compressed and hard for the 12 hour flight

The crew are amazing. Very professional, polite, kind, and accommodating.

Flight attendants. Food, entertainment and most of all, be on time.

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.

Delayed flight, lack of information, boarding process is a mess as is the carryon luggage causing issues when leaving the plane….just a poor experience.

Comfortable. Easy. No problems. Just wish they had gf options for snacks.

The crew was very kind and made going to Hawaii relaxing and fun to look forward to! Thank you Southwest for a pleasant flight!

Terrible. Even though there’s assigned seating now, they are still the slowest boarding airline of anyone.

It was good from LAX to Phoenix, But the connection in Phoenix to Tulsa was not that great. The staff on both flights were great. The choice of free entertainment was ok nothing to brag about. The 45 min delay because of some electrical issue wasn't great from Phoenix to Tulsa. We sat there with hardly any air, The seat I had was between windows so the side of the plane pushed in on you. My being a bigger man it then made the seating area uncomfortable. The seats on the plane had no power to connect to recharge your phone or anything. I would recommend that they should look into a slot or clamp to hold your phone to enjoy while watching the entertainment choices hands-free. Also make it possible to raise the inner seat by the window be able to raise the arm rest up to make more room for larger people to set more comfortably. I would also say other then that stop price gouging the airfare or nickel and diming everything. Not fair for people having to fly for emergencies and be paying for higher prices due to the season or holidays. Your making your money either way and the cost of flying is still going to be the same regardless if there's 100 people or 200 people.

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

Boarding was easy. The seats are small and fairly uncomfortable

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

Flight boarded late after announcing on time boarding. Flight arrived only a little late despite late departure. Had trouble connecting to WiFi

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

Flight itself excellent, but delayed so missed connection & got to destination 2 hrs later

Due to cancellation of connecting flight (Lufthansa) I didn’t fly with United

It was a red-eye, but the flight felt surprisingly quick. The seats were very comfortable, and that made resting much easier. I also want to thank the gentleman seated next to me, who graciously moved so my mom could sit beside me. We slept almost the entire way. The cabin crew was respectful in not disturbing us, while also being courteous and professional throughout. Thank you, United.

Boarding was again a "free for all". We were boarding group 4, and almost the entire plane was able to board before us. It's a shame that someone who follows the rules, gets the short end of the stick. Not fair.

It was perfect! I've never flown with United before, but I definitely will in the future

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

The business class seat is exceptional. I wish the food is more palatable.

On time departure and early arrival. Flight attendant very nice.

The business class layout of chairs was weired. You are sitting directly across stranger.,

The SFO Lounge crew were amazing. The bartender Faris was great. Thanks!

Friendly crew is the only nice thing. Seats uncomfortable. Food and snacks horrible. Movies were the same as the first 10 hour flight two weeks before

Was not able to do a online check-in because the American Airlines system doesn't store our visa or other passport information, allowing us to have a trouble-free check-in. We were forced to have to check-in at the counter which Changes are upgrade status given that we were not able to check in much earlier.

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

We left at 1030 am pacific from LA and supposed to land at 7 pm Eastern in NY. They made a detour, stopped in Philadelphia and didn’t land till 1130 PM Eastern!!! Worst flight experience with no pilot communication with no explanation as to what was going on. Everyone was very frustrated to say the least.

I cancelled my ticket less than 24 hours deadline but I didn’t get refunded.

Flight boarded from Gate 159B, the farthest gate in the LAX Bradley Terminal. While the flight operated on time, the first class cabin attendant made no recognition of my being an Advantage Executive Platinum member.

The flight itself was excellent but the gate attendant made me check my carryon since she said it was an inch too big. I’ve had no problems with this carryon on recent flights on Qantas, Delta, Austrian, Southwest Airlines even though the overhead bins are the same size. there were other carryons in the bins that also looked larger than mine and there was room left in the bins for more. When I picked up my carryon from baggage claim one of the wheels had broken off.

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

They switched our terminal 3 times and we were delayed for four plus hours!!!

It was an early flight and most people napped/slept and the crew let us which was nice.

The crew acted like they had never done this and kept barking passive aggressive orders at people. + the security line + the delay + sitting on the tarmac for 2 hours + none of the apps or signage updating with correct times

Remind customers of the need to have passport or new ID for boarding.

The flight never took off and we spent 7 hours at the airport

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

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.

Everything you need to know for your flight from Ontario

Information on your arrival and departure airports