HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$358+ Cheap flights from Asia to Ontario (ONT)

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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ONT
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Asia to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Asia to Ontario

Keep the following information in mind while searching for Asia to Ontario flight deals. Data was last updated junio 12, 2025.

Round-trip from

$625
(United Airlines)

One-way from

$358
(Trip.com)

Popular in

July

Cheapest in

March

Average price

$763

Good round-trip deal

$898 or less

Good one-way deal

$542 or less
From Asia to Ontario
Search Deals
One-way flight from Asia to Ontario
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($143 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals
Price to beat on a round-trip flight from Asia to Ontario.
Search Deals
Price to beat on a one-way flight from Asia to Ontario.
Search Deals

Find flight deals from Asia to Ontario

Cheapest flights from Asia to Ontario
Explore the most affordable flight options available from Asia to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/106:00 pmICN - ONT
2 stops35h 33mUnited Airlines
vie. 11/146:00 amONT - ICN
1 stop17h 15mUnited Airlines
Deal found 6/12$625
This oojo deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 6/1310:35 amMNL - ONT
1 stop22h 25mChina Airlines
jue. 6/1912:10 amONT - MNL
1 stop24h 40mChina Airlines
Deal found 6/12$735
This Booking.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/128:10 pmHKG - ONT
1 stop35h 55mSTARLUX Airlines
mié. 6/2511:10 pmONT - HKG
1 stop28h 45mSTARLUX Airlines
Deal found 6/10$738
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/302:50 pmTPE - ONT
2 stops44h 27mUnited Airlines
dom. 11/305:40 amONT - TPE
2 stops46h 10mUnited Airlines
Deal found 6/10$743
This China Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/311:05 amHKG - ONT
1 stop21h 45mChina Airlines
vie. 11/2810:45 pmONT - HKG
1 stop18h 30mChina Airlines
Deal found 6/10$758
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 6/2111:15 amHKG - ONT
1 stop15h 59mUnited Airlines
sáb. 6/286:28 pmONT - HKG
2 stops33h 27mUnited Airlines
Deal found 6/11$760
This Expedia deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/283:50 pmHND - ONT
1 stop17h 47mUnited Airlines
mié. 9/36:00 amONT - HND
1 stop15h 55mUnited Airlines
Deal found 6/12$760
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/94:30 pmNRT - ONT
1 stop36h 02mUnited Airlines
sáb. 9/131:15 pmONT - NRT
1 stop33h 40mUnited Airlines
Deal found 6/11$761
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/98:40 amMNL - ONT
2 stops42h 52mUnited Airlines
sáb. 9/131:15 pmONT - MNL
2 stops49h 40mUnited Airlines
Deal found 6/11$788
This FlightHub deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/254:50 pmMNL - ONT
1 stop16h 10mMultiple Airlines
dom. 11/210:45 pmONT - MNL
2 stops39h 05mMultiple Airlines
Deal found 6/12$793
This FlightHub deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/102:05 pmBKK - ONT
1 stop17h 45mChina Airlines
sáb. 5/212:10 amONT - BKK
1 stop19h 35mChina Airlines
Deal found 6/11$799
This Kissandfly.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 6/164:50 pmICN - ONT
1 stop21h 55mLufthansa
dom. 6/296:10 amONT - ICN
1 stop16h 50mLufthansa
Deal found 6/10$801

Cheapflights Fare Finder

Customize your flight search to find flights from Asia to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated junio 12, 2025.
Use the filters below to find and compare flights from Asia to Ontario that are best for you.

Fly from

Asia

Fly to

Ontario

Route

Depart

Return

Price

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

lun. 11/10

6:00 pm-12:33 pm

2 stops35h 33m

Ontario

vie. 11/14

6:00 am-4:15 pm

1 stop17h 15m

$625

ManilaOntario

MNL - ONT

MNLONT

Manila Ninoy Aquino Intl

mié. 6/25

10:35 am-6:00 pm

1 stop22h 25m

Ontario

jue. 8/21

12:45 am-9:35 am

1 stop17h 50m

$735

Taipei CityOntario

TPE - ONT

TPEONT

Taipei City Taiwan Taoyuan Intl

jue. 10/30

2:50 pm-8:17 pm

2 stops44h 27m

Ontario

dom. 11/30

5:40 am-7:50 pm

2 stops46h 10m

$743

Hong KongOntario

HKG - ONT

HKGONT

Hong Kong Intl

sáb. 9/13

11:20 am-5:05 pm

1 stop20h 45m

Ontario

sáb. 9/27

11:10 pm-9:55 am

1 stop19h 45m

$751

Hong KongOntario

HKG - ONT

HKGONT

Hong Kong Intl

lun. 11/3

11:05 am-4:50 pm

1 stop21h 45m

Ontario

vie. 11/28

10:45 pm-9:15 am

1 stop18h 30m

$758

Hong KongOntario

HKG - ONT

HKGONT

Hong Kong Intl

vie. 6/27

11:15 am-8:54 pm

2 stops24h 39m

Ontario

vie. 7/4

5:05 am-6:55 pm

2 stops22h 50m

$760

TokyoOntario

HND - ONT

HNDONT

Tokyo Haneda

jue. 8/28

3:50 pm-5:37 pm

1 stop17h 47m

Ontario

mié. 9/3

6:00 am-1:55 pm

1 stop15h 55m

$760

TokyoOntario

NRT - ONT

NRTONT

Tokyo Narita

mar. 9/9

4:30 pm-12:32 pm

1 stop36h 02m

Ontario

sáb. 9/13

1:15 pm-2:55 pm

1 stop33h 40m

$761

ManilaOntario

MNL - ONT

MNLONT

Manila Ninoy Aquino Intl

sáb. 10/25

4:50 pm-6:00 pm

1 stop16h 10m

Ontario

dom. 11/2

10:45 pm-5:50 am

2 stops39h 05m

$793

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

mié. 10/1

10:50 am-6:00 pm

1 stop21h 10m

Ontario

lun. 10/20

12:10 am-9:45 am

1 stop19h 35m

$799

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Asia to Ontario

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

Cheapflights Insights

Everything you need to know about your flight from Asia to Ontario

What is the cheapest month to book a flight from Asia to Ontario?

Currently, August is the cheapest month in which you can book a flight from Asia to Ontario (average of $246). Flying from Asia to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from AS to ONT?

Find hourly flight availability from Asia to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated junio 12, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Asia to Ontario as you normally would.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 junio 12, 2025.
STARLUX Airlines
9.1
Wonderful
177 reviews

Entertainment

8.9

Boarding

9.0

Comfort

9.0

Food

8.8

Overall

9.1

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
STARLUX Airlines
9.1
Wonderful
177 reviews
STARLUX Airlines
9.1
Wonderful
177 reviews

Entertainment

8.9

Boarding

9.0

Comfort

9.0

Food

8.8

Overall

9.1

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
EVA Air
8.4
Very good
1,202 reviews
STARLUX Airlines
9.1
Wonderful
177 reviews

Entertainment

8.9

Boarding

9.0

Comfort

9.0

Food

8.8

Overall

9.1

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Korean Air
8.4
Very good
1,088 reviews
STARLUX Airlines
9.1
Wonderful
177 reviews

Entertainment

8.9

Boarding

9.0

Comfort

9.0

Food

8.8

Overall

9.1

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Japan Airlines
8.3
Very good
1,489 reviews
STARLUX Airlines
9.1
Wonderful
177 reviews

Entertainment

8.9

Boarding

9.0

Comfort

9.0

Food

8.8

Overall

9.1

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
China Airlines
8.3
Very good
738 reviews
STARLUX Airlines
9.1
Wonderful
177 reviews

Entertainment

8.9

Boarding

9.0

Comfort

9.0

Food

8.8

Overall

9.1

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

Related info for your journey

Find useful and relevant information for your journey from Asia to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Ontario from Asia.

  • What are the cheapest airlines to fly from Asia to Ontario one-way?

    $389 is the cheapest one-way deal found within the past few days, from Hawaiian Airlines. You may also be able to find cheap deals on United Airlines and China Airlines, with prices starting from $432 and $439, respectively.

  • What are the most popular routes from Asia to Ontario?

    When deciding which route to take from Asia to Ontario consider Tokyo Narita - Ontario, Tokyo Haneda - Ontario or Bangkok Suvarnabhumi - Ontario as they are the most popular.

  • Can I find deals for flights from Asia to Ontario that include hotel bookings?

    Yes. In addition to deals on Asia to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Asia to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Asia to Ontario.

  • Can I find deals for business class flights from Asia to Ontario?

    Yes. Cheapflights offers flight deals from Asia to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Asia to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Asia to Ontario (average of $246). Flying from Asia to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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.

Alternative routes for Asia to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Los Angeles flights
Newark to Los Angeles flights
Seattle to Los Angeles flights
John F Kennedy Intl to San Francisco flights
John F Kennedy Intl to Las Vegas flights
Dallas/Fort Worth to Los Angeles flights
Dallas/Fort Worth to Las Vegas flights
Hobby to Las Vegas flights
Newark to San Francisco flights
O'Hare Intl to Las Vegas flights
O'Hare Intl to Los Angeles flights
Los Angeles to San Francisco flights
Newark to Las Vegas flights
Dulles Intl to Los Angeles flights
San Jose to Los Angeles flights
San Francisco to Las Vegas flights
LaGuardia to Los Angeles flights
San Francisco to Los Angeles flights
Reagan-National to Los Angeles flights
Denver to Las Vegas flights
George Bush Intcntl to Las Vegas flights
Seattle to Las Vegas flights
Los Angeles to Las Vegas flights
Atlanta to Las Vegas flights
Boston to Los Angeles flights
Los Angeles to San Jose flights
Seattle to Santa Ana flights
LaGuardia to Las Vegas flights
Oakland to Santa Ana flights
Dulles Intl to Las Vegas flights
Santa Ana to Las Vegas flights
Baltimore to Las Vegas flights
Dallas/Fort Worth to San Francisco flights
Boston to Las Vegas flights
Dulles Intl to San Francisco flights
Oakland to Los Angeles flights
Seattle to Ontario flights
LaGuardia to San Francisco flights
Hobby to Los Angeles flights
Los Angeles to Oakland flights
Portland to Los Angeles flights
Burbank to Las Vegas flights
John F Kennedy Intl to San Diego flights
Seattle to San Francisco flights
John F Kennedy Intl to Ontario flights
Newark to Burbank flights
O'Hare Intl to San Francisco flights
Seattle to San Diego flights
Santa Ana to Oakland flights
Baltimore to Los Angeles flights

Top 2 airlines flying from Asia to Ontario

Discover the top 2 airlines that operate flights from Asia to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$755FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$724Average$893FlexibilityNo cancel feeOn-time70%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.