$75+ Cheap flights from Ontario
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/12. 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.
What to know about flights from Ontario
Discover essential information about flights departing from Ontario, including flight schedules, destinations, airlines operating at the Ontario airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 29 August 2025.
Cheapest one-way flight | $43 |
---|---|
Cheapest round-trip flight | $81 |
Cheapest airline | Alaska Airlines |
Most popular destination | Sydney Kingsford Smith (SYD) |
Good round-trip deal | $1,676 or less |
Good one-way deal | $338 or less |
Find flights from Ontario
Cheapest flights from OntarioExplore the most affordable flight options available from Ontario. Find the lowest fares based on data from user searches, with prices last updated on 29 August 2025.
Explore the most affordable flight options available from Ontario. Find the lowest fares based on data from user searches, with prices last updated on 29 August 2025.
Find flights from Ontario within your budget
Fly to
Route
Depart
Return
Price
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Thu 11/9
06:00-07:11
Nonstop1h 11m
Las Vegas Harry Reid Intl
Tue 23/9
20:49-21:56
Nonstop1h 07m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Mon 17/11
08:40-09:45
Nonstop1h 05m
Las Vegas Harry Reid Intl
Tue 18/11
19:45-20:45
Nonstop1h 00m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Mon 8/12
20:55-21:55
Nonstop1h 00m
Las Vegas Harry Reid Intl
Thu 11/12
05:30-09:15
1 stop3h 45m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Thu 6/11
21:15-22:15
Nonstop1h 00m
Las Vegas Harry Reid Intl
Mon 10/11
17:20-22:05
1 stop4h 45m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Sat 20/9
11:15-15:20
1 stop4h 05m
Las Vegas Harry Reid Intl
Mon 22/9
07:10-08:15
Nonstop1h 05m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Mon 22/9
15:15-20:00
1 stop4h 45m
Las Vegas Harry Reid Intl
Tue 23/9
19:40-20:45
Nonstop1h 05m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Tue 30/9
13:55-18:15
1 stop4h 20m
Las Vegas Harry Reid Intl
Tue 30/9
19:40-20:45
Nonstop1h 05m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Sat 4/10
15:50-22:10
1 stop6h 20m
Las Vegas Harry Reid Intl
Mon 6/10
22:00-23:00
Nonstop1h 00m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Mon 13/10
21:35-22:40
Nonstop1h 05m
Las Vegas Harry Reid Intl
Thu 16/10
08:25-12:05
1 stop3h 40m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Sat 11/10
15:50-22:10
1 stop6h 20m
Las Vegas Harry Reid Intl
Mon 13/10
22:00-23:00
Nonstop1h 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, April is the cheapest month in which you can book a flight from Ontario (average of $743). Flying from Ontario in December will prove the most costly (average of $1,332). 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?
Ontario offers frequent flights to Seattle (102 flights per day), Dallas (88 flights per day) and Salt Lake City (69 flights per day).
What is the cheapest place to fly to from Ontario?
The cheapest city to fly to from Ontario is San Salvador El Salvador Intl, with prices starting at $337. Explore other affordable destinations below.
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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 29 August 2025.
Fly with Cheapflights
Find the best flight deals on Cheapflights, where travellers 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?
It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Ontario.
Can Cheapflights find flights from Ontario with no change fees?
Certainly. Search results for flights from Ontario shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Can Cheapflights notify me if prices for flights from Ontario become cheaper?
Yes, Cheapflights has a feature called Price Alerts, which offers users the ability to be notified when flight prices change. Track prices for your flight from Ontario today and book when you’re ready!