₱5,972+ Cheap flights from Ontario
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
Find flights from Ontario within your budget
Fly to
Route
Depart
Return
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Thu 1/7
6:00 am-10:07 am
1 stop4h 07m
Las Vegas Harry Reid Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
OntarioSacramento
ONT Ontario - SMF Sacramento Intl
ONTSMF
Ontario
Wed 11/11
5:04 pm-11:37 pm
1 stop6h 33m
Sacramento Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Wed 11/4
1:35 pm-6:23 pm
1 stop4h 48m
Las Vegas Harry Reid Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
OntarioSacramento
ONT Ontario - SMF Sacramento Intl
ONTSMF
Ontario
Tue 11/17
12:50 pm-6:45 pm
2 stops5h 55m
Sacramento Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
OntarioSacramento
ONT Ontario - SMF Sacramento Intl
ONTSMF
Ontario
Sat 1/9
11:10 am-12:40 pm
Nonstop1h 30m
Sacramento Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Tue 11/3
3:30 pm-8:45 pm
1 stop5h 15m
Las Vegas Harry Reid Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Sat 11/21
7:00 pm-12:10 am
1 stop5h 10m
Las Vegas Harry Reid Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
OntarioKansas City
ONT Ontario - MCI Kansas City
ONTMCI
Ontario
Mon 11/2
5:00 am-12:28 pm
1 stop5h 28m
Kansas City
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
OntarioKansas City
ONT Ontario - MCI Kansas City
ONTMCI
Ontario
Thu 1/21
7:00 am-5:32 pm
1 stop8h 32m
Kansas City
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
OntarioOrlando
ONT Ontario - MCO Orlando
ONTMCO
Ontario
Thu 10/29
11:13 am-11:59 pm
1 stop9h 46m
Orlando
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
Best time to book a flight from Ontario
Have a flexible travel schedule? Discover the best time to fly from Ontario with our price prediction graph.
Travel insights for flights from Ontario
Get recent, data-driven insights about flights from Ontario including ideal travel times, pricing trends, and more.
What is the cheapest month to book a flight from Ontario?
Currently, February is the cheapest month in which you can book a flight from Ontario (average of ₱45,951). Flying from Ontario in December will prove the most costly (average of ₱88,005). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.
Which airlines fly from Ontario?
Only one airline operates round-trip flights from Ontario: China Airlines. This airline flies to the following popular destinations: Manila.
What are popular destinations to fly to from Ontario?
If you’re flying from Ontario, these routes are more frequently taken by airlines Dallas (119 flights per day), Seattle (54 flights per day) and Denver (52 flights per day).
What is the cheapest place to fly to from Ontario?
The cheapest city to fly to from Ontario is Las Vegas Harry Reid Intl, with prices starting at ₱9,427. Explore other affordable destinations below.
When is the best time to book a flight from Ontario?
The best time to book flights from Ontario is 85 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Airline reviews for flights from Ontario
Read reviews and ratings of airlines operating flights from Ontario. Gain insights into the quality of service, in-flight amenities, customer experiences, and overall satisfaction to choose the best airline for your Ontario travel. Please note that the reviews are sourced from user searches and were last updated on October 8, 2026. In the last 7 days, Cheapflights users made a total of 7,457,451 searches.
Get a feel of what it's like to fly with China Airlines from Ontario by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
Entertainment
Comfort
Boarding
Food
Crew
Reviews
Anonymous,Sep 2026
SYD - TPE
Overall
Entertainment
Comfort
Boarding
Food
Crew
Reviews
Anonymous,Sep 2026
SYD - TPE
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Fly your favorite airline from Ontario
Browse through various options for flying your favorite airline from Ontario. Flight routes are based on user searches made on Cheapflights and were last updated on October 8, 2026.
Direct flights from California
Book a non-stop flight from one of these other cities located in California.
Airports servicing Ontario
Fly out of one of these airports located in Ontario.
Fly from other United States cities
Consider departing from one of these cities also located in United States. Flight origins are based on user searches made on Cheapflights and were last updated on October 8, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Related info for your journey
Access useful and relevant information related to your journey from Ontario. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated October 8, 2026.
Fly with Cheapflights
Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Ontario?
Cheapflights makes it easy to find flights from Ontario by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.
Why should you use Cheapflights to find cheap flight tickets from Ontario?
Cheapflights helps you find that perfect flight from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from Ontario with no change fees?
Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario flexibly with Cheapflights today.
Can Cheapflights notify me if prices for flights from Ontario become cheaper?
Yes! Start tracking prices for flights from Ontario today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive the alerts.