HK$1,051+ Cheap flights from Ontario
This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 14-11. 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 — HKG
4 Nov — 11 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 5 October 2026. In the last 7 days, Cheapflights users made a total of 7,457,451 searches
Fly to
Route
Departure
Return
Cheapest return flight
Fastest return journey
OntarioOklahoma City
ONT Ontario - OKC Oklahoma City Will Rogers World
ONTOKC
Ontario
Sat 14-11
05:45-12:00
1 stop4h 15m
Oklahoma City Will Rogers World
Wed 31-12
00:00-22:00
Nonstop0h 00m
HK$1,051
OntarioDetroit
ONT Ontario - DTW Detroit Metropolitan Wayne County
ONTDTW
Ontario
Wed 18-11
17:56-06:27
1 stop9h 31m
Detroit Metropolitan Wayne County
Wed 31-12
00:00-21:00
Nonstop0h 00m
HK$1,773
OntarioOklahoma City
ONT Ontario - OKC Oklahoma City Will Rogers World
ONTOKC
Ontario
Wed 4-11
05:00-20:10
2 stops13h 10m
Oklahoma City Will Rogers World
Wed 31-12
00:00-22:00
Nonstop0h 00m
HK$1,860
OntarioOklahoma City
ONT Ontario - OKC Oklahoma City Will Rogers World
ONTOKC
Ontario
Tue 30-3
11:20-23:41
2 stops10h 21m
Oklahoma City Will Rogers World
Wed 31-12
00:00-22:00
Nonstop0h 00m
HK$1,860
OntarioOklahoma City
ONT Ontario - OKC Oklahoma City Will Rogers World
ONTOKC
Ontario
Sat 19-12
15:00-01:05
2 stops8h 05m
Oklahoma City Will Rogers World
Wed 31-12
00:00-22:00
Nonstop0h 00m
HK$2,150
OntarioOklahoma City
ONT Ontario - OKC Oklahoma City Will Rogers World
ONTOKC
Ontario
Sun 14-2
06:00-16:09
1 stop8h 09m
Oklahoma City Will Rogers World
Wed 31-12
00:00-22:00
Nonstop0h 00m
HK$2,189
OntarioOklahoma City
ONT Ontario - OKC Oklahoma City Will Rogers World
ONTOKC
Ontario
Fri 8-1
05:00-18:14
2 stops11h 14m
Oklahoma City Will Rogers World
Wed 31-12
00:00-22:00
Nonstop0h 00m
HK$2,228
OntarioDetroit
ONT Ontario - DTW Detroit Metropolitan Wayne County
ONTDTW
Ontario
Thu 31-12
18:27-09:28
2 stops12h 01m
Detroit Metropolitan Wayne County
Wed 31-12
00:00-21:00
Nonstop0h 00m
HK$2,323
OntarioOklahoma City
ONT Ontario - OKC Oklahoma City Will Rogers World
ONTOKC
Ontario
Sat 17-10
10:35-20:00
2 stops7h 25m
Oklahoma City Will Rogers World
Wed 31-12
00:00-22:00
Nonstop0h 00m
HK$2,346
OntarioOklahoma City
ONT Ontario - OKC Oklahoma City Will Rogers World
ONTOKC
Ontario
Tue 13-10
11:25-20:55
2 stops7h 30m
Oklahoma City Will Rogers World
Wed 31-12
00:00-22:00
Nonstop0h 00m
HK$2,346
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-HKG
ONT-OKC
ONT-DTW
ONT-TPE
ONT-MNL
Estimated return 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-HKG
ONT-OKC
ONT-DTW
ONT-TPE
ONT-MNL
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 HK$6,866). Flying from Ontario in December will prove the most costly (average of HK$13,771). 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?
If you’re flying from Ontario, these routes are more frequently taken by airlines Dallas (64 flights per day), Seattle (59 flights per day) and Denver (54 flights per day).
What is the cheapest place to fly to from Ontario?
The cheapest city to fly to from Ontario is Seattle/Tacoma Intl, with prices starting at HK$1,893. Explore other affordable destinations below.
When is the best time to book a flight from Ontario?
The price you pay for your flight from Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 7 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
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Direct flights from California
nearby airports
Other United States cities
Popular flights
Direct flights from California
Book a direct 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 5 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 5 October 2026.
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?
Deals for flights from Ontario are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose to your preference, such as price, airport, cabin class, and plenty of other options.
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?
Yes! Cheapflights helps users easily find flights from Ontario with no change fees.
Can Cheapflights notify me if prices for flights from Ontario become cheaper?
Not ready to book yet? You can track prices for flights from Ontario on Cheapflights with our Price Alerts feature and get notified when better prices are available.