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HK$3,717+ Cheap flights to 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 15-11. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
29 Aug — 5 Sep1
1 adult
1 adult, Economy, 0 bags

Flights to Ontario in 2026

Enter your travel dates to find the best prices.

Cheapest flights to Ontario
Explore the most affordable flight options available to Ontario. Find the lowest fares based on data from user searches, with prices last updated on 30 July 2026.

Thu 10-920:10
HKG
-
ONT
1 stop35h 55m
星宇航空
Wed 23-923:30
ONT
-
HKG
1 stop28h 25m
星宇航空
Deal found 26-7HK$6,219
Tue 1-920:10
HKG
-
ONT
1 stop35h 55m
星宇航空
Fri 11-923:30
ONT
-
HKG
1 stop19h 40m
星宇航空
Deal found 30-7HK$6,266
Wed 9-911:20
HKG
-
ONT
1 stop20h 45m
星宇航空
Wed 16-923:30
ONT
-
HKG
1 stop19h 25m
星宇航空
Deal found 26-7HK$6,274
Wed 28-1010:35
HKG
-
ONT
1 stop16h 54m
United Airlines
Wed 28-1016:17
ONT
-
HKG
1 stop22h 28m
United Airlines
Deal found 25-7HK$6,282
Wed 21-1011:45
HKG
-
ONT
2 stops24h 13m
United Airlines
Sun 25-1013:35
ONT
-
HKG
1 stop38h 45m
United Airlines
Deal found 29-7HK$6,321
Thu 29-1010:35
HKG
-
ONT
2 stops40h 58m
United Airlines
Sat 31-1013:29
ONT
-
HKG
2 stops25h 16m
United Airlines
Deal found 28-7HK$6,329
Mon 21-911:20
HKG
-
ONT
1 stop20h 45m
星宇航空
Mon 28-923:30
ONT
-
HKG
1 stop28h 25m
星宇航空
Deal found 29-7HK$6,368
Mon 26-1022:30
HKG
-
ONT
1 stop15h 18m
United Airlines
Tue 10-1116:17
ONT
-
HKG
1 stop22h 28m
United Airlines
Deal found 29-7HK$6,399
Fri 25-920:10
HKG
-
ONT
1 stop35h 55m
星宇航空
Sat 10-1023:30
ONT
-
HKG
1 stop19h 25m
星宇航空
Deal found 25-7HK$6,439

Find flight deals to Ontario

Find the latest flights to Ontario in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 70,647 searches and data was last updated on 30 July 2026.

Return from

HK$5,552

One-way from

HK$3,717

Popular in

July

Cheapest in

November

Average price

HK$8,180
United Airlines
  • United Airlines
  • 24-9-25-9
  • Nonstop
  • 28h 25m total
  • Hong Kong to Los Angeles
Search Deals
15-11
  • 15-11
  • 2 total stops
  • 33h 55m total
  • Hong Kong to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (HK$820 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (HK$165 potential savings vs. average return price).
Search Deals
Average for return flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Locate flights to Ontario that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 70,647 searches and data was last updated on 30 July 2026.
Use the filters below to find and compare flights to Ontario that are best for you.

Fly from

Route

Departure

Return

Price

Cheapest return flight

Hong KongOntario

HKG - ONT

HKGONT

Hong Kong Intl

Wed 21-10

11:45-20:58

2 stops24h 13m

Ontario

Sun 25-10

13:35-19:20

1 stop38h 45m

HK$6,321

Hong KongOntario

HKG - ONT

HKGONT

Hong Kong Intl

Thu 29-10

10:35-12:29

1 stop16h 54m

Ontario

Sat 31-10

13:29-19:20

2 stops38h 51m

HK$6,329

Hong KongOntario

HKG - ONT

HKGONT

Hong Kong Intl

Fri 16-10

20:10-17:05

1 stop35h 55m

Ontario

Sat 24-10

22:45-10:10

1 stop20h 25m

HK$6,368

Hong KongOntario

HKG - ONT

HKGONT

Hong Kong Intl

Thu 24-9

20:10-17:05

1 stop35h 55m

Ontario

Sat 10-10

23:30-18:55

1 stop28h 25m

HK$6,368
Fastest return journey

Hong KongOntario

HKG - ONT

HKGONT

Hong Kong Intl

Fri 4-12

17:35-17:05

1 stop15h 30m

Ontario

Sat 26-12

22:50-09:15

1 stop18h 25m

HK$8,289

Hong KongOntario

HKG - ONT

HKGONT

Hong Kong Intl

Fri 18-12

20:05-17:05

1 stop37h 00m

Ontario

Mon 1-2

22:50-16:35

1 stop25h 45m

HK$9,238

Hong KongOntario

HKG - ONT

HKGONT

Hong Kong Intl

Sat 19-12

14:05-17:05

1 stop19h 00m

Ontario

Thu 7-1

22:50-13:00

1 stop22h 10m

HK$9,270

Hong KongOntario

HKG - ONT

HKGONT

Hong Kong Intl

Sat 15-8

14:05-18:40

1 stop19h 35m

Ontario

Fri 21-8

00:45-10:05

1 stop18h 20m

HK$10,383

Hong KongOntario

HKG - ONT

HKGONT

Hong Kong Intl

Sat 15-8

17:35-18:40

1 stop16h 05m

Ontario

Sat 29-8

00:45-10:05

1 stop18h 20m

HK$10,383

Hong KongOntario

HKG - ONT

HKGONT

Hong Kong Intl

Thu 13-8

11:05-18:40

1 stop22h 35m

Ontario

Thu 27-8

00:45-10:05

1 stop18h 20m

HK$10,383

Flights are sorted by cheapest return flights first.

Deals found on 25-7

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Best time to book a flight to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario with our price prediction graph.
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.

Cheapflights Insights

Everything you need to know about your flight to Ontario

What are the cheapest airlines that fly to Ontario?

The cheapest airline flying from Hong Kong to Ontario is China Airlines.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 30 July 2026.
Get a feel of what it's like to fly with China Airlines to the United States 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.
China Airlines
8.3
Very Good
838 reviews
Check prices

Comfort

8.0

Overall

8.3

Crew

8.5

Entertainment

8.0

Boarding

8.3

Food

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

TPE - SFO

China Airlines has horrible customer services. The flight I was taking had many empty seats, but I got rejected many services with the excuses that the flight is fully booked. 1. When I was checking in at the front dest to request the seat together with my husband, I was told that the flight was fully booked. We need to pay almost extra $200 per person to sit together. 2. When I tried to use the VIP lounge with my mileage points, I was rejected. The reason was that the flight was fully booked.
China Airlines
8.3
Very Good
838 reviews
China Airlines
8.3
Very Good
838 reviews
Check prices

Comfort

8.0

Overall

8.3

Crew

8.5

Entertainment

8.0

Boarding

8.3

Food

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

TPE - SFO

China Airlines has horrible customer services. The flight I was taking had many empty seats, but I got rejected many services with the excuses that the flight is fully booked. 1. When I was checking in at the front dest to request the seat together with my husband, I was told that the flight was fully booked. We need to pay almost extra $200 per person to sit together. 2. When I tried to use the VIP lounge with my mileage points, I was rejected. The reason was that the flight was fully booked.

FAQs about flying to Ontario

  • What airport do you fly into for flights to Ontario?

    For a flight to Ontario, you will be flying into Ontario. Ontario (ONT) is just 4.9 km from the centre of the city.

  • Can I find cheaper flights to Ontario if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Ontario on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Ontario?

    Based on reviews from Cheapflights users, China Airlines is rated the highest out of the airlines that fly to Ontario.

  • What is the cheapest airport to fly to in Ontario?

    Ontario is currently the cheapest airport to fly to in Ontario. One-way flights to Ontario typically cost HK$479, while return flights cost around HK$1,776.

  • How much is a return flight to Ontario?

    A return flight to Ontario will typically cost around HK$1,776, however they can be found for as little as HK$1,776.

  • Does Ontario have rental cars?

    Yes. Those touching down at Ontario can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Ontario?

    Yes. Ontario has hotels nearby for those requiring accommodations. Delta Hotels by Marriott Ontario Airport is the closest property to Ontario (0.0 km away from Ontario).

See more FAQs

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How does Cheapflights help users find flights to Ontario?

Deals for Ontario flights 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 to Ontario?

Cheapflights helps you find that perfect flight to 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 to Ontario with no change fees?

Certainly. Search results for flights to 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 to Ontario become cheaper?

Yes, Cheapflights offers price alerts on Ontario flights so you can book your flight when prices are ideal. Enable price alerts by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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