$64 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 5/8. 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 4/11 and returning Sat 4/18

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, Jun 6 - Thu, Jun 11
Volaris Logo
9:36 pm - 11:54 am
ONT
-
CUN
12h 18m
1 stop
Volaris Logo
10:40 am - 7:46 pm
CUN
-
ONT
11h 06m
1 stop
$239Volaris
Wed, Apr 1 - Tue, Apr 14
Volaris Logo
9:36 pm - 11:54 am
ONT
-
CUN
12h 18m
1 stop
Volaris Logo
4:32 pm - 11:05 pm
CUN
-
ONT
8h 33m
1 stop
$262Volaris
Mon, May 11 - Tue, May 19
Volaris Logo
12:55 am - 1:37 pm
ONT
-
CUN
10h 42m
1 stop
Volaris Logo
2:20 pm - 7:46 pm
CUN
-
ONT
7h 26m
1 stop
$265Volaris
Tue, May 5 - Mon, May 11
TAP AIR PORTUGAL Logo
4:45 pm - 9:50 pm
LAX
-
BCN
20h 05m
1 stop
TAP AIR PORTUGAL Logo
8:20 pm - 1:45 pm
BCN
-
LAX
26h 25m
1 stop
$486TAP AIR PORTUGAL
Sat, Sep 5 - Mon, Sep 14
Scandinavian Airlines Logo
7:10 pm - 9:45 am
LAX
-
BCN
29h 35m
1 stop
Scandinavian Airlines Logo
10:35 am - 4:50 pm
BCN
-
LAX
15h 15m
1 stop
$487Scandinavian Airlines
Sat, May 2 - Tue, May 12
TAP AIR PORTUGAL Logo
6:00 pm - 1:30 am
LAX
-
BCN
22h 30m
1 stop
TAP AIR PORTUGAL Logo
6:00 am - 1:45 pm
BCN
-
LAX
16h 45m
1 stop
$490TAP AIR PORTUGAL
Wed, Sep 2 - Wed, Sep 30
Scandinavian Airlines Logo
7:10 pm - 12:00 pm
LAX
-
MAD
31h 50m
1 stop
Scandinavian Airlines Logo
6:30 pm - 4:50 pm
MAD
-
LAX
31h 20m
1 stop
$506Scandinavian Airlines
Wed, Sep 2 - Mon, Sep 7
Scandinavian Airlines Logo
7:10 pm - 12:00 pm
LAX
-
MAD
31h 50m
1 stop
Scandinavian Airlines Logo
6:30 pm - 4:50 pm
MAD
-
LAX
31h 20m
1 stop
$512Scandinavian Airlines
Sat, Sep 5 - Wed, Sep 16
Scandinavian Airlines Logo
7:10 pm - 12:00 pm
LAX
-
MAD
31h 50m
1 stop
Scandinavian Airlines Logo
6:30 pm - 4:50 pm
MAD
-
LAX
31h 20m
1 stop
$513Scandinavian Airlines
Sun, May 10 - Mon, May 18
Singapore Airlines Logo
8:55 pm - 11:00 am
LAX
-
BKK
24h 05m
1 stop
Singapore Airlines Logo
3:30 pm - 9:20 pm
BKK
-
LAX
19h 50m
1 stop
$565Singapore 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

Fri, Apr 24 - Tue, May 5
Frontier Logo
12:59 am - 4:15 am
ONT
-
DEN
2h 16mnonstop
Frontier Logo
10:29 pm - 11:55 pm
DEN
-
ONT
2h 26mnonstop
$80Frontier
Sun, Apr 26 - Mon, May 4
Frontier Logo
12:59 am - 4:15 am
ONT
-
DEN
2h 16mnonstop
Frontier Logo
10:29 pm - 11:55 pm
DEN
-
ONT
2h 26mnonstop
$82Frontier
Wed, Apr 29 - Wed, May 6
Frontier Logo
12:59 am - 4:15 am
ONT
-
DEN
2h 16mnonstop
Frontier Logo
10:29 pm - 11:49 pm
DEN
-
ONT
2h 20mnonstop
$84Frontier
Tue, Apr 14 - Sat, Apr 18
Delta Logo
5:05 pm - 11:59 pm
ONT
-
SEA
6h 54m
1 stop
Delta Logo
5:35 am - 12:14 pm
SEA
-
ONT
6h 39m
1 stop
$119Delta
Sat, Apr 4 - Tue, Apr 14
Delta Logo
11:59 am - 2:55 pm
ONT
-
SEA
2h 56mnonstop
Delta Logo
5:35 am - 12:14 pm
SEA
-
ONT
6h 39m
1 stop
$128Delta
Fri, Apr 17 - Mon, Apr 20
Southwest Logo
1:50 pm - 6:50 pm
ONT
-
HOU
3h 00mnonstop
Southwest Logo
8:05 am - 9:30 am
HOU
-
ONT
3h 25mnonstop
$237Southwest
Fri, Apr 17 - Mon, Apr 20
Southwest Logo
9:55 pm - 4:50 am
ONT
-
HOU
4h 55m
1 stop
Southwest Logo
8:05 am - 9:30 am
HOU
-
ONT
3h 25mnonstop
$247Southwest
Mon, Apr 27 - Thu, Apr 30
Alaska Airlines Logo
8:30 am - 11:35 am
ONT
-
HNL
6h 05mnonstop
Alaska Airlines Logo
12:35 pm - 9:10 pm
HNL
-
ONT
5h 35mnonstop
$307Alaska Airlines
Sun, Apr 26 - Thu, Apr 30
Alaska Airlines Logo
8:30 am - 11:35 am
ONT
-
HNL
6h 05mnonstop
Alaska Airlines Logo
12:35 pm - 9:10 pm
HNL
-
ONT
5h 35mnonstop
$312Alaska Airlines
Tue, Apr 21 - Tue, Apr 28
United Airlines Logo
6:00 am - 11:48 am
ONT
-
HNL
8h 48m
1 stop
United Airlines Logo
7:00 am - 6:02 pm
HNL
-
ONT
8h 02m
1 stop
$316United Airlines
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 (16% of total searches). The next most popular destinations are Seattle/Tacoma Intl (10%) 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 Manila, Bangkok and London.

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 (51% of total searches). The next most popular destinations are Mexico (39%) 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, 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 $131, while the most expensive was Honolulu, at $265.

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, Morelia, León and San Salvador. On average, the cheapest of these destinations on KAYAK over the last 2 weeks for a return flight was León at $132, while the most expensive was Taipei City, at $560.

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 $28. The next cheapest destinations were Morelia at $37 and San José del Cabo at $41.

Good to know

Low seasonJanuary
Cheapest flight$64
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 13% increase in price.
Flight from Ontario to Houston George Bush Airport

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.
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 $140 one-way - $242 round-trip; Dallas $157 one-way - $303 round-trip; Taipei City $421 one-way - $732 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 813 reviews
8.3Boarding
8.0Comfort
8.5Crew
7.8Food
8.0Entertainment
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.

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

The Southwest experience has definitely taken a dive from its early days. You can no longer deferentiate from other airlines. Air travel is too expensive. Southwest is no longer budget friendly. They have lost me as a loyal customer.

The charges were ridiculous for an hour flight and the turbulence was very scary.

The seats are now more narrow. I paid for front row the seats in the front are even more narrow than before.

The wifi on the plane is great. The only issue that I have is that I prefer an aisle seat and on my trips this week, I was either in the middle or window. If we can work to secure aisle seating, I will be thrilled. Nice trip.

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 777’s economy seat’s legroom was more tolerable than expected. I appreciate the reclining mechanism which slides the seat forward to minimize cannibalizing the space behind. The food was terrible: very salty.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

Complimentary light meal would be appreciated. But great flight crew service on all legs

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

We had turbulence ever 1/2 hr or so and the captains announcements were SOOOO LOUD

Women boarding passengers at the gate was absolutely rude and disrespectful of passengers. The flight attendant was absolutely delightful! Smiling and connected with the passengers. So happy. The seats are cramped and uncomfortable but I guess that’s just the way it is Communication regarding flight was excellent

it was a very short flight so my expectations were low.

Entertainment kept turning itself off. Gave up on watching a movie.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Dloght delayed by 2.5 hrs . Common theme in my last four american floghts

They are rarely on time! Very hard to plan your travels when flights or connections keep getting delayed.

My seat was assigned last row behind restrooms No legroom’s I’m very Pettit Still was not comfortable Food choice was excellent

The worst Airline ever. They centered my second flight and leave me in NY. They don’t have any representatives at the airport and they don’t respond to calls. Basically I got stuck. I will never purchase through there again.

The chicken wrap was tiny ($13 for what looked like a 1/3 of a normal wrap?) and disgusting.

Mediocre would be best description. Food bland. Seat biz class uncomfortable to sleep. Crew never dimmed lights completely in an overnight flight to Europe. Would avoid AA if possible.

Small plane, poor meal choices for first class, bad terminal and boarding experience at LAX

Massimo, flight attendant was very authentic, attentive - wonderful. Food/wrap was just okay.

Experience was great. The best part is the free Wi-Fi connection which helps me to work on the flight

The flight was fine. It's the satellite terminal that supports American eagle flights is what sucks. There is only one food option and everything there is way overpriced. I mean I know it's airport pricing, but it's even crazier than that. I bought a sandwich in a plastic container for $18.

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

Flight was canceled. Most upsetting was message from Kayak, stating that the flight was canceled and click with Kayak for details regarding rebook, refund details. THERE'S NO INFORMATION PROVIDED BY KAYAK EXCEPT THAT FLIGHT IS CANCELED. AND NOW THIS SURVEY TO FIND OUT HOW WAS THE FLIGHT !!!!!!!

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

Gate not determined until I got to the airport - hard to plan the trip to the airport.

Our flight was canceled. I will never use Kayak nor Frontier for travel again. The entire experience was a headache.

Frontier.. nickel and dime add-ons. Flight late, on time, late again, last minute gate change, arrival gate required a shuttle to the terminal. They sure keep you guessing.. if you like a little chaos and airport anxiety, this is the airline for you!

This is my second time flying with Frontier. My current experience was very favorable. The staff from the gate to the plane was friendly, warm and professional. The food options lacked in my opinion. This area needs some attention in my opinion.

First of all we hade waited 3 hours in the airplane waiting to leave. Second the return schedule was changed and it messed up my entire vaction. I won't buy never again another flight and recommend to nobody traveling with them.

There was no food and no entertainment, so I'm not sure why these are even in the survey, as my understanding is frontier does not ever offer food without a few, not even a snack, and there are no screens so unless the flight safety talk is our entertainment why ask how we liked it?. One of the flight attendants say in the back of the plane as people filed in to their seats, yelling orders about where to put baggage and telling people to hurry up. It was the least professional experience I've ever had on a flight.

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.

Everything you need to know for your flight from Ontario

Information on your arrival and departure airports