$165+ 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 27/8. 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.
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 14 July 2025.
Cheapest one-way flight | $301 |
---|---|
Cheapest round-trip flight | $81 |
Cheapest airline | Spirit Airlines |
Most popular destination | Nadi (NAN) |
Good one-way deal | $1,105 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 14 July 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 14 July 2025.
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 14 July 2025. In the last 7 days, Cheapflights users made a total of 134,765 searches
Fly to
Route
Departure
Return
Price
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Sat 11/10
07:10-09:30
Nonstop2h 20m
Portland
Tue 14/10
07:40-10:01
Nonstop2h 21m
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Sat 23/8
07:10-09:27
Nonstop2h 17m
Portland
Fri 29/8
07:03-09:26
Nonstop2h 23m
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Tue 26/8
11:40-16:59
1 stop5h 19m
Portland
Sun 31/8
15:18-22:42
1 stop7h 24m
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Sun 31/8
11:35-16:20
1 stop4h 45m
Portland
Sun 7/9
05:25-13:05
1 stop7h 40m
OntarioPortland
ONT - PDX
ONTPDX
Ontario
Wed 15/10
13:53-20:50
1 stop6h 57m
Portland
Wed 22/10
05:30-12:13
1 stop6h 43m
OntarioBozeman
ONT - BZN
ONTBZN
Ontario
Wed 24/9
06:00-14:14
1 stop7h 14m
Bozeman Gallatin Field
Sat 27/9
05:22-09:26
1 stop5h 04m
OntarioBozeman
ONT - BZN
ONTBZN
Ontario
Sat 30/8
06:05-10:49
1 stop3h 44m
Bozeman Gallatin Field
Tue 2/9
05:30-08:55
1 stop4h 25m
OntarioBozeman
ONT - BZN
ONTBZN
Ontario
Sun 24/8
06:00-14:14
1 stop7h 14m
Bozeman Gallatin Field
Sat 6/9
05:22-09:26
1 stop5h 04m
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Tue 12/8
16:50-22:34
1 stop4h 44m
Billings Logan Intl
Wed 13/8
18:08-23:40
1 stop6h 32m
OntarioBozeman
ONT - BZN
ONTBZN
Ontario
Wed 29/10
10:45-17:15
1 stop5h 30m
Bozeman Gallatin Field
Wed 5/11
05:30-12:10
2 stops7h 40m
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 $548). Flying from Ontario in September will prove the most costly (average of $1,178). 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?
Some of the most frequent flights departing from Ontario everyday are: Seattle (158 flights per day), Dallas (124 flights per day), and Atlanta (82 flights per day).
What is the cheapest place to fly to from Ontario?
The cheapest city to fly to from Ontario is Honolulu, with prices starting at $1,105. Explore other affordable destinations below.
Airline reviews for flights from Ontario
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 134,765 searches.
Check out reviews from past customers who have flown Alaska Airlines and United Airlines from Ontario to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
Crew
Comfort
Overall
Entertainment
Food
Reviews
James,Apr 2025
LAX - SFO
Boarding
Crew
Comfort
Overall
Entertainment
Food
Reviews
James,Apr 2025
LAX - SFO
Boarding
Crew
Comfort
Overall
Entertainment
Food
Reviews
James,Apr 2025
LAX - SFO
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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 14 July 2025.
Fly with Cheapflights
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How does Cheapflights help users find flights from Ontario?
When you search for this flight from Ontario, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the best flight for you.
Why should you use Cheapflights to find cheap flight tickets from Ontario?
Millions of users choose and trust Cheapflights to book the best flight deals from Ontario for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.
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!