$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 2/14. 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 2/21 and returning Sat 2/28

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, Jul 13 - Sat, Jul 18
Volaris Logo
12:59 am - 2:06 pm
ONT
-
CUN
11h 07m
1 stop
Volaris Logo
4:32 pm - 11:05 pm
CUN
-
ONT
8h 33m
1 stop
$280Volaris
Wed, Jul 1 - Wed, Jul 8
Volaris Logo
9:13 pm - 12:08 pm
ONT
-
CUN
12h 55m
1 stop
Volaris Logo
10:53 am - 7:23 pm
CUN
-
ONT
10h 30m
1 stop
$283Volaris
Sat, Mar 14 - Fri, Mar 20
Volaris Logo
11:02 pm - 12:05 pm
ONT
-
CUN
11h 03m
1 stop
Volaris Logo
1:02 pm - 8:11 pm
CUN
-
ONT
9h 09m
1 stop
$284Volaris
Sun, Apr 12 - Wed, Apr 22
British Airways Logo
4:23 pm - 9:40 am
SNA
-
MAD
32h 17m
2 stops
British Airways Logo
1:35 pm - 9:13 pm
MAD
-
SNA
16h 38m
1 stop
$426British Airways
Mon, Feb 2 - Wed, Feb 11
British Airways Logo
4:45 pm - 6:30 pm
ONT
-
MAD
16h 45m
2 stops
British Airways Logo
12:40 pm - 10:48 pm
MAD
-
ONT
19h 08m
1 stop
$426British Airways
Tue, Feb 3 - Wed, Feb 18
British Airways Logo
10:58 am - 9:25 am
ONT
-
MAD
13h 27m
1 stop
British Airways Logo
12:40 pm - 10:49 pm
MAD
-
ONT
19h 09m
1 stop
$428British Airways
Mon, Apr 27 - Thu, May 7
LEVEL Logo
7:55 pm - 4:40 pm
LAX
-
BCN
11h 45mnonstop
LEVEL Logo
2:05 pm - 6:10 pm
BCN
-
LAX
13h 05mnonstop
$485LEVEL
Mon, Apr 27 - Fri, May 8
LEVEL Logo
7:55 pm - 4:40 pm
LAX
-
BCN
11h 45mnonstop
LEVEL Logo
2:05 pm - 6:10 pm
BCN
-
LAX
13h 05mnonstop
$486LEVEL
Mon, Mar 30 - Fri, Apr 10
LEVEL Logo
7:55 pm - 4:40 pm
LAX
-
BCN
11h 45mnonstop
LEVEL Logo
2:05 pm - 6:10 pm
BCN
-
LAX
13h 05mnonstop
$488LEVEL
Wed, Mar 4 - Wed, Mar 11
Multiple Airlines Logo
8:15 pm - 8:45 pm
LAX
-
BVA
15h 30m
1 stop
Multiple Airlines Logo
9:35 am - 7:30 pm
BVA
-
LAX
17h 55m
1 stop
$565Multiple Airlines

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, Mar 9 - Wed, Mar 11
Frontier Logo
9:40 pm - 10:50 pm
ONT
-
LAS
1h 10mnonstop
Frontier Logo
7:55 pm - 9:03 pm
LAS
-
ONT
1h 08mnonstop
$59Frontier
Thu, Mar 5 - Thu, Mar 12
Frontier Logo
7:22 pm - 8:31 pm
ONT
-
LAS
1h 09mnonstop
Frontier Logo
12:00 pm - 1:11 pm
LAS
-
ONT
1h 11mnonstop
$60Frontier
Sat, Jan 31 - Sat, Feb 7
Frontier Logo
7:35 pm - 8:44 pm
ONT
-
LAS
1h 09mnonstop
Frontier Logo
5:30 pm - 6:40 pm
LAS
-
ONT
1h 10mnonstop
$61Frontier
Tue, Feb 17 - Fri, Feb 27
Delta Logo
5:00 pm - 12:09 am
ONT
-
SEA
7h 09m
1 stop
Delta Logo
7:00 pm - 11:49 pm
SEA
-
ONT
4h 49m
1 stop
$119Delta
Thu, Mar 12 - Tue, Mar 17
Alaska Airlines Logo
4:02 pm - 6:52 pm
ONT
-
SEA
2h 50mnonstop
Alaska Airlines Logo
8:30 am - 11:08 am
SEA
-
ONT
2h 38mnonstop
$128Alaska Airlines
Wed, Feb 18 - Sun, Feb 22
Alaska Airlines Logo
6:14 am - 9:09 am
ONT
-
SEA
2h 55mnonstop
Alaska Airlines Logo
8:56 pm - 11:32 pm
SEA
-
ONT
2h 36mnonstop
$129Alaska Airlines
Sun, Feb 15 - Wed, Feb 18
American Airlines Logo
11:58 pm - 11:31 am
ONT
-
JFK
8h 33m
1 stop
American Airlines Logo
2:30 pm - 7:45 pm
JFK
-
ONT
8h 15m
1 stop
$237American Airlines
Wed, Feb 18 - Sat, Feb 21
American Airlines Logo
11:58 pm - 1:24 pm
ONT
-
JFK
10h 26m
2 stops
American Airlines Logo
6:30 am - 11:36 am
JFK
-
ONT
8h 06m
1 stop
$242American Airlines
Sat, Mar 7 - Wed, Mar 11
Southwest Logo
2:50 pm - 7:45 pm
ONT
-
HOU
2h 55mnonstop
Southwest Logo
9:30 pm - 11:05 pm
HOU
-
ONT
3h 35mnonstop
$333Southwest
Sat, May 2 - Mon, May 4
Southwest Logo
6:00 am - 1:50 pm
ONT
-
HOU
5h 50m
1 stop
Southwest Logo
8:00 am - 9:30 am
HOU
-
ONT
3h 30mnonstop
$339Southwest
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 Seattle/Tacoma Intl (17% of total searches). The next most popular destinations are San Francisco (8%) and New York (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 Manila, Bangkok and San José del Cabo.

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 (36%) 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 Phoenix, Portland, Honolulu, Denver and San Jose. On average, the cheapest of these destinations on KAYAK over the last 2 weeks for a return flight was Seattle at $188, while the most expensive was Portland, at $293.

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 and Guadalajara. On average, the cheapest of these destinations on KAYAK over the last 2 weeks for a return flight was San José del Cabo at $141, while the most expensive was Taipei City, at $513.

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 16m, 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 $40. The next cheapest destinations were Las Vegas at $41 and Morelia at $41.

Good to know

Low seasonDecember
Cheapest flight$29
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly with an average 7% 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 
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: Dallas $160 one-way - $267 round-trip; Las Vegas $107 one-way - $84 round-trip; Taipei City $408 one-way - $700 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 799 reviews
8.5Crew
8.0Entertainment
7.8Food
8.3Boarding
8.0Comfort
Airline reviews

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

8.0 ExcellentAnonymous, Dec 2025
PHX - TPE
Read more China Airlines reviews

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.

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.

Great flight but super high price. Glad it was a business trip and not personal

3 hour delay. Had to change plans and was still delayed.

We got exit row seats both flights. Everything was running on time

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 flight crew where really good. Better then the crew from BNE to SFO

Food should be changed in menu Many muslims travels in this airlime they need to add one Halal meal

left on time, reasonable boarding process arrived early luggage came out quickly

Some flight attendants were great others were cranky. Seats were very tight and sitting on an aisle was very hard as the carts and people walking constantly bumped shoulder and arm.

It was great with United overall except for two things. 1) It was a 5-hour flight and we were with kids, so we were asking for extra snacks. They were extremely reticent to dole them out even though there wasn't any meal and the kids were starting to hit their limit towards the end. 2) Baggage didn't arrive until 80 minutes after we landed.

I’m so sorry, I can’t remember her name, I believe it was Dimpti. She was stellar, also a mature Asian flight attendant, lots of flowers in her hair, just as amazing! But literally the crew was AWESOME . Only downside is there weren’t any charging outlets. Maybe I needed to ask a flight attendant , but it would’ve been nice to have one easily accessible.

I boarded flight UA#1318 at Sacramento International Airport going back to Houston TX. The flight was scheduled at 5:10am. I was able to check in virtually using the United Airlines app. When I entered the airport, there was no one outside assisting with checked bags as it was for Delta Airlines. Immediately upon entering, there was a LONG, EXTREMELY LONG line to the kiosks to get boarding passes. I stand in line to get boarding passes then had to move to ANOTHER EXTREMELY LONG line to get my bags checked in. While standing in this line, we noticed an agent taking customers to 3 at a time to her station to check their bags in. Lucky for me, she called me back, checked my bags for me and I was on my way. I then encountered another long line at the TSA check and to avoid I ending up having to sign up for CLEAR to bypass it. So glad, I did.,...Both of my flights were great with no issues, butthe check in progress at Bush Airport was so much smoother. Check-in at SMF airport needs to be anaylzed and corrected. Do better United, I know you can....thanks

Pushed back only to get deplaned due to a tire damaged by ground crew. They did at least go pretty fast. The bathrooms should be banned under the Geneva convention. No room to even sit straight on the toilet. The under-seat entertainment units block what little leg room there is.

United airlines has the best customer experience from booking to arrival. I always fly United airlines. The mileage program is excellent

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

The entertainment options were at best, fair. It was exactly the same as my outbound flight. It would have been more entertaining if there were some series from Apple TV, HBO, Showtime or other carriers for me to catch up with.

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

While I didn’t watch much tv I would have liked a few more options of TV series from Apple TV or hbo max ..

Overall experience was great. Flights were almost on time in departing and we arrived at our destination as scheduled. No issues with amenities or flight crew. Everything went well as as expected. Will fly again with American Airlines in the future!

The flight was very smooth and the meal in business class was great.

I requested a low sodium meal. Reason being, I take medicine for high blood pressure and I wear compression socks on long flights to help with leg swelling. Having less sodium in meals really helps me feel better on long flights. I received my initial low sodium meal after takeoff. Just before landing, the crew came through with the meal cart and offered me what was being served. I said no thank you and then noticed my low sodium meal in the meal cart, with my name and seat assignment on it. I motioned to the crew member, but he grabbed the meal cart and proceeded to move to the rear of the aircraft. He didn’t see me or other passengers who had attempted to get this attention. He was more concerned about completing meal service since we were due to land in under 45 minutes. I pressed the call light five times from my seat to receive help, but no crew member responded to me. So, I didn’t receive a second meal, one that I requested (the low sodium option). This led me to have a migraine from only eating one meal on an 11-hour flight. This is why I’m not a fan of flying US-based airlines overseas. The crew members continue to show the absolute worst customer service experience. I would not recommend flying American for overseas flights.

Not great. Booked Extra seats and got nothing extra at all. It’s basically a big budget airline.

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!

Good for a budget airline! It was easy to get on, staff was really nice. Can’t say anything about the food or entertainment because it wasn’t available, which is fine.

I am writing to express my disappointment with my recent Frontier Airlines flight. I was charged $99 at the gate because my bag was said to be too large, yet once onboard there was no available overhead bin space, and I was required to place the bag under the seat in front of me anyway. This made the charge feel unnecessary and unfair. Additionally, before the flight even took off, I was asked to move from the seat I paid for into a middle seat so another passenger and her cat could have my seat to themselves. I was not offered compensation or an explanation for being moved from a paid seat. Between the unexpected bag fee and being forced to give up my seat, this experience fell well below acceptable customer service standards. I would appreciate a review of this situation and appropriate compensation.

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

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.

It didn’t happen. I booked it and then was told it wasn’t available and then forced to pay far higher prices for a worse option

A 630departure flight Delayed 6hours! They changed my gate, I moved to the new gate. Had our flight on the screen for 12noon departure. I go get above to eat, check screen again and the flight was gone, no notice no announcement, nothing!! They sent my bag on the flight I wasn’t on, got it back to me 3days later. Thank goodness they did refund my money but I will NEVER fly them again.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

Plane and crew on board were fine. Everything else was terrible.

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.

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.

Everything you need to know for your flight from Ontario

Information on your arrival and departure airports