Sign in
C$ 88+ 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 10/11. 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 — YVR
9 Nov — 16 Nov1
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 October 2026. In the last 7 days, Cheapflights users made a total of 7,457,451 searches
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioSeattle
ONT Ontario - SEA Seattle/Tacoma Intl
ONTSEA
Ontario
Sat 7/11
6:00 a.m.-8:51 a.m.
Nonstop2h 51m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 113
Quickest round-trip
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
Tue 1/12
10:25 a.m.-11:45 a.m.
Nonstop1h 20m
Oakland
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 127
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
Wed 6/1
1:55 p.m.-3:20 p.m.
Nonstop1h 25m
Oakland
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 137
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Thu 7/1
6:00 a.m.-10:07 a.m.
1 stop4h 07m
Las Vegas Harry Reid Intl
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 141
OntarioSeattle
ONT Ontario - SEA Seattle/Tacoma Intl
ONTSEA
Ontario
Tue 8/12
6:00 a.m.-8:57 a.m.
Nonstop2h 57m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 141
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Wed 4/11
4:55 p.m.-8:50 p.m.
1 stop3h 55m
Las Vegas Harry Reid Intl
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 141
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
Tue 24/11
9:35 p.m.-6:50 a.m.
1 stop9h 15m
Oakland
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 148
OntarioSeattle
ONT Ontario - SEA Seattle/Tacoma Intl
ONTSEA
Ontario
Sun 1/11
6:00 p.m.-8:59 p.m.
Nonstop2h 59m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 162
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
Mon 9/11
11:20 a.m.-12:40 p.m.
Nonstop1h 20m
Oakland
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 162
OntarioSeattle
ONT Ontario - SEA Seattle/Tacoma Intl
ONTSEA
Ontario
Tue 10/11
4:09 p.m.-6:56 p.m.
Nonstop2h 47m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-12:00 a.m.
Nonstop0h 00m
C$ 169
Showing 1-10 of 60 resultsSorted by cheapest first
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-YVR
ONT-LAS
ONT-SEA
ONT-OAK
ONT-SAT
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-YVR
ONT-LAS
ONT-SEA
ONT-OAK
ONT-SAT
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 C$ 423). Flying from Ontario in September will prove the most costly (average of C$ 792). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.
What are popular destinations to fly to from Ontario?
From Ontario you can expect to find greater availability for the following destinations: Dallas (145 flights per day), Seattle (113 flights per day) and Atlanta (89 flights per day).
What is the cheapest place to fly to from Ontario?
The cheapest city to fly to from Ontario is Denver Intl, with prices starting at C$ 94. Explore other affordable destinations below.
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.
Nearby airports
Non-stop flights from California
Other United States cities
Popular destinations
Popular flights
Airports servicing Ontario
Fly out of one of these airports located in Ontario.
Non-stop flights from California
Book a direct flight from one of these other cities located in California.
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 10 October 2026.
Popular Return Flight Destinations
Consider these popular destinations that Cheapflights users have chosen when departing from Ontario. Routes are based on user searches and were last updated on 10 October 2026.
Popular flight searches
Check out other popular destinations found by fellow travellers 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 10 October 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 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!