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 22/12. 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.
ONT — YYZ
10 Dec — 17 Dec1
Round-trip
1 adult
Economy
Round-trip
1 adult, Economy, 0 bags
Find flights from Ontario within your budget
Find flights departing from Ontario that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 10 November 2026. In the last 7 days, Cheapflights users made a total of 7,457,451 searches
Fly to
Route
Depart
Return
Price
Cheapest round-trip
Quickest round-trip
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
Fri 15/1
10:15 a.m.-11:35 a.m.
Nonstop1h 20m
Oakland
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 97
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Fri 1/1
3:30 p.m.-8:50 p.m.
1 stop5h 20m
Las Vegas Harry Reid Intl
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 104
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Wed 3/3
7:40 a.m.-11:10 a.m.
1 stop3h 30m
Las Vegas Harry Reid Intl
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 104
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Wed 20/1
7:40 a.m.-11:10 a.m.
1 stop3h 30m
Las Vegas Harry Reid Intl
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 104
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Tue 22/12
5:10 a.m.-9:50 a.m.
1 stop4h 40m
Las Vegas Harry Reid Intl
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 104
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Thu 28/1
11:30 a.m.-3:30 p.m.
1 stop4h 00m
Las Vegas Harry Reid Intl
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 104
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Mon 23/11
4:17 p.m.-10:51 p.m.
1 stop6h 34m
Las Vegas Harry Reid Intl
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 175
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Sun 22/11
5:00 a.m.-8:20 a.m.
1 stop3h 20m
Las Vegas Harry Reid Intl
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 175
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Mon 7/12
1:30 p.m.-2:35 p.m.
Nonstop1h 05m
Las Vegas Harry Reid Intl
Mon 14/12
6:45 a.m.-7:45 a.m.
Nonstop1h 00m
C$ 179
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Fri 15/1
7:35 p.m.-11:00 p.m.
1 stop3h 25m
Las Vegas Harry Reid Intl
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 190
Flights are sorted by cheapest round-trip flights first.
Deals found on 5/11
Showing 1-10 of 60 resultsSorted by cheapest first
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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.
ONT-YYZ
ONT-OAK
ONT-LAS
ONT-SEA
ONT-DTW
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Travel insights for flights from Ontario
Get recent, data-driven insights about flights from Ontario including ideal travel times, pricing trends, and more.
ONT-YYZ
ONT-OAK
ONT-LAS
ONT-SEA
ONT-DTW
What is the cheapest month to book a flight from Ontario?
Currently, April is the cheapest month in which you can book a flight from Ontario (average of C$ 686). Flying from Ontario in January will prove the most costly (average of C$ 1,418). 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?
For flights departing from Ontario check dates and pricing for the following: United Airlines. This airline departs to the following popular destinations: Toronto.
What are popular destinations to fly to from Ontario?
From Ontario you can expect to find greater availability for the following destinations: Dallas (134 flights per day), Phoenix (74 flights per day) and Denver (72 flights per day).
Get insights into the airlines that provide service from Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing airline for your flight from Ontario. 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 United 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.
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 10 November 2026.
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 10 November 2026.
What are the most popular destinations to fly to from Ontario?
This month, the top selected destinations from Ontario are Las Vegas, Dallas/Fort Worth Airport, Guadalajara. Throughout the year, Las Vegas, Dallas/Fort Worth Airport, Guadalajara are some of the top choices made by users flying from Ontario.
What is the cheapest flight from Ontario to anywhere?
Users have flown out of Ontario for as low as C$ 214 to Seattle (prices may vary depending on the airline and departure time). On average, users have booked flights for C$ 371 to fly from Ontario.
At the present moment the cheapest month to fly from Ontario is currently April; with January being the most expensive. Prices will vary depending on multiple factors such as booking in advance, airline and departure airports and times.
Where are the cheapest places to fly to from Ontario?
Check out the cheapest flights from Ontario to embark to: Travel from Ontario to Vancouver from C$ 372 round trip Travel from Ontario to Toronto from C$ 528 round trip
How does Cheapflights help users find flights from Ontario?
Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.
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?
Cheapflights does show flights with no change fees to all users. To see these options for flights from Ontario, users can toggle the no change fees filter when performing a flight search.
Can Cheapflights notify me if prices for flights from Ontario become cheaper?
Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and use a valid email address to enable the Price Alerts feature. That’s it!
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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 goes through 900+ travel sites to look for the best flight deals for flights from Ontario. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.
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?
Cheapflights does show flights with no change fees to all users. To see these options for flights from Ontario, users can toggle the no change fees filter when performing a flight search.
Can Cheapflights notify me if prices for flights from Ontario become cheaper?
Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and use a valid email address to enable the Price Alerts feature. That’s it!
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