HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$343+ Cheap flights from Southeast 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 12/13. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — ONT
jun. 23 — jun. 301
lun. 6/23
lun. 6/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Southeast 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 Southeast Asia to Ontario

Keep the following information in mind while searching for Southeast Asia to Ontario flight deals. Data was last updated junio 18, 2025.

Round-trip from

$555
(oojo)

One-way from

$343
(oojo)
From Southeast Asia to Ontario
Search Deals
One-way flight from Southeast Asia to Ontario
Search Deals

Find flight deals from Southeast Asia to Ontario

Cheapest flights from Southeast Asia to Ontario
Explore the most affordable flight options available from Southeast Asia to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 18, 2025.

This oojo deal was found by Cheapflights users on 6/15. 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.
mié. 8/2010:00 amCRK - ONT
1 stop22h 40mSTARLUX Airlines
lun. 9/111:10 pmONT - CRK
1 stop28h 45mSTARLUX Airlines
Deal found 6/15$555
This oojo deal was found by Cheapflights users on 6/15. 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.
dom. 6/228:05 pmCEB - ONT
1 stop36h 00mSTARLUX Airlines
mié. 11/269:45 pmONT - CEB
1 stop28h 50mSTARLUX Airlines
Deal found 6/15$560
This China Airlines deal was found by Cheapflights users on 6/16. 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.
mar. 9/164:50 pmMNL - ONT
1 stop16h 10mChina Airlines
sáb. 10/2511:50 pmONT - MNL
1 stop19h 05mChina Airlines
Deal found 6/16$732
This Gotogate deal was found by Cheapflights users on 6/17. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/1910:50 amSGN - ONT
1 stop21h 10mChina Airlines
jue. 10/1612:10 amONT - SGN
1 stop26h 10mChina Airlines
Deal found 6/17$758
This oojo deal was found by Cheapflights users on 6/16. 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.
mar. 7/86:25 pmSGN - ONT
1 stop37h 15mSTARLUX Airlines
lun. 7/2811:45 pmONT - SGN
1 stop20h 30mSTARLUX Airlines
Deal found 6/16$775
This KAYAK deal was found by Cheapflights users on 6/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/2612:05 pmCEB - ONT
1 stop20h 55mChina Airlines
jue. 7/1012:45 amONT - CEB
1 stop19h 20mChina Airlines
Deal found 6/16$783
This oojo deal was found by Cheapflights users on 6/18. 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.
jue. 6/2610:35 amMNL - ONT
1 stop22h 25mMultiple Airlines
jue. 7/102:21 pmONT - MNL
2 stops28h 14mMultiple Airlines
Deal found 6/18$792
This United Airlines deal was found by Cheapflights users on 6/16. 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. 9/168:40 amMNL - ONT
2 stops51h 03mUnited Airlines
sáb. 10/255:05 amONT - MNL
2 stops58h 45mUnited Airlines
Deal found 6/16$812
This Gotogate deal was found by Cheapflights users on 6/17. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/285:50 pmHAN - ONT
1 stop37h 50mSTARLUX Airlines
vie. 9/1211:10 pmONT - HAN
1 stop21h 15mSTARLUX Airlines
Deal found 6/17$841
This Gotogate deal was found by Cheapflights users on 6/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/1110:55 amBKK - ONT
1 stop20h 55mChina Airlines
dom. 11/1610:45 pmONT - BKK
1 stop23h 20mChina Airlines
Deal found 6/16$859
This Gotogate deal was found by Cheapflights users on 6/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/175:50 pmBKK - ONT
1 stop37h 15mSTARLUX Airlines
sáb. 6/2111:10 pmONT - BKK
1 stop22h 50mSTARLUX Airlines
Deal found 6/16$865
This KAYAK deal was found by Cheapflights users on 6/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/2010:00 amCRK - ONT
1 stop22h 40mMultiple Airlines
mié. 9/33:04 pmONT - CRK
2 stops36h 51mMultiple Airlines
Deal found 6/16$866

Cheapflights Fare Finder

Customize your flight search to find flights from Southeast 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 18, 2025.
Use the filters below to find and compare flights from Southeast Asia to Ontario that are best for you.

Fly from

Southeast Asia

Fly to

Ontario

Route

Depart

Return

Price

Angeles CityOntario

CRK - ONT

CRKONT

Angeles City Clark Intl

mié. 8/20

10:00 am-5:40 pm

1 stop22h 40m

Ontario

lun. 9/1

11:10 pm-6:55 pm

1 stop28h 45m

$555

Cebu CityOntario

CEB - ONT

CEBONT

Cebu City Mactan Intl

vie. 7/18

8:05 pm-5:40 pm

1 stop36h 35m

Ontario

vie. 7/25

11:45 pm-7:05 pm

1 stop28h 20m

$670

ManilaOntario

MNL - ONT

MNLONT

Manila Ninoy Aquino Intl

mar. 9/16

4:50 pm-6:00 pm

1 stop16h 10m

Ontario

sáb. 10/25

11:50 pm-9:55 am

1 stop19h 05m

$732

Ho Chi Minh CityOntario

SGN - ONT

SGNONT

Ho Chi Minh City

vie. 9/19

5:30 pm-6:00 pm

1 stop38h 30m

Ontario

mié. 10/8

12:10 am-9:40 am

1 stop19h 30m

$758

Ho Chi Minh CityOntario

SGN - ONT

SGNONT

Ho Chi Minh City

mar. 7/8

6:25 pm-5:40 pm

1 stop37h 15m

Ontario

lun. 7/28

11:45 pm-10:15 am

1 stop20h 30m

$775

ManilaOntario

MNL - ONT

MNLONT

Manila Ninoy Aquino Intl

sáb. 10/25

10:35 am-6:00 pm

1 stop22h 25m

Ontario

dom. 11/2

10:45 pm-12:35 pm

2 stops45h 50m

$794

ManilaOntario

MNL - ONT

MNLONT

Manila Ninoy Aquino Intl

mar. 9/16

8:40 am-8:43 pm

2 stops51h 03m

Ontario

sáb. 10/25

5:05 am-6:50 am

2 stops58h 45m

$812

Cebu CityOntario

CEB - ONT

CEBONT

Cebu City Mactan Intl

dom. 9/7

12:05 pm-6:40 pm

1 stop21h 35m

Ontario

lun. 10/6

12:10 am-1:20 pm

2 stops22h 10m

$826

HanoiOntario

HAN - ONT

HANONT

Hanoi Noibai

jue. 8/28

5:50 pm-5:40 pm

1 stop37h 50m

Ontario

vie. 9/12

11:10 pm-10:25 am

1 stop21h 15m

$841

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

mar. 11/11

10:55 am-4:50 pm

1 stop20h 55m

Ontario

dom. 11/16

10:45 pm-1:05 pm

1 stop23h 20m

$859

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/16

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

Best time to book a flight from Southeast Asia to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Southeast 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 Southeast Asia to Ontario

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

Currently, August is the cheapest month in which you can book a flight from Southeast Asia to Ontario (average of $246). Flying from Southeast 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 YJX to ONT?

Find hourly flight availability from Southeast 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 18, 2025.

When flying from Southeast Asia to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 18, 2025.
Read reviews from past customers who have flown STARLUX Airlines, EVA Air and Korean Air from Southeast Asia to Ontario. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.1
Wonderful
180 reviews

Entertainment

9.0

Comfort

9.0

Overall

9.1

Boarding

9.0

Food

8.9

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
180 reviews
STARLUX Airlines
9.1
Wonderful
180 reviews

Entertainment

9.0

Comfort

9.0

Overall

9.1

Boarding

9.0

Food

8.9

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
1,205 reviews
STARLUX Airlines
9.1
Wonderful
180 reviews

Entertainment

9.0

Comfort

9.0

Overall

9.1

Boarding

9.0

Food

8.9

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
1,090 reviews
STARLUX Airlines
9.1
Wonderful
180 reviews

Entertainment

9.0

Comfort

9.0

Overall

9.1

Boarding

9.0

Food

8.9

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
1,494 reviews
STARLUX Airlines
9.1
Wonderful
180 reviews

Entertainment

9.0

Comfort

9.0

Overall

9.1

Boarding

9.0

Food

8.9

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
742 reviews
STARLUX Airlines
9.1
Wonderful
180 reviews

Entertainment

9.0

Comfort

9.0

Overall

9.1

Boarding

9.0

Food

8.9

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 Southeast 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 Southeast Asia?

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

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

    The cheapest airline one-way is STARLUX Airlines, with whom users have recently found tickets for as low as $343. However, be on the lookout for offers from China Airlines and United Airlines, as they are both options that can get you from Southeast Asia to Ontario for a low price.

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

    The most popular flight routes from Southeast Asia to Ontario are Manila Ninoy Aquino Intl - Ontario, Bangkok Suvarnabhumi - Ontario and Ho Chi Minh City - Ontario.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Southeast 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 Southeast Asia to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Southeast Asia to Ontario (average of $246). Flying from Southeast 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 Southeast Asia to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Mumbai to San Francisco flights
New Delhi to San Francisco flights
Haneda to Los Angeles flights
Manila to Los Angeles flights
Incheon Intl to Los Angeles flights
Narita to Los Angeles flights
Taiwan Taoyuan Intl to San Francisco flights
Taiwan Taoyuan Intl to Los Angeles flights
Amritsar to Los Angeles flights
Hongqiao Intl to Los Angeles flights
Manila to San Francisco flights
Haneda to San Francisco flights
Pu Dong to Los Angeles flights
Mumbai to San Jose flights
Mumbai to Oakland flights
Bangalore to San Francisco flights
Hong Kong to Los Angeles flights
Hongqiao Intl to San Francisco flights
Hong Kong to San Francisco flights
Incheon Intl to San Francisco flights
Pu Dong to San Francisco flights
New Delhi to San Jose flights
Narita to San Francisco flights
Gimpo Intl to Los Angeles flights
Hyderabad to San Francisco flights
Suvarnabhumi to Los Angeles flights
Yerevan to Los Angeles flights
New Delhi to Oakland flights
Incheon Intl to Ontario flights
Taiwan Taoyuan Intl to Ontario flights
Haneda to Ontario flights
Suvarnabhumi to San Francisco flights
Narita to Ontario flights
Fukuoka to Los Angeles flights
Gimpo Intl to San Francisco flights
Sung Shan to Los Angeles flights
Mumbai to Los Angeles flights
New Delhi to Los Angeles flights
Singapore to San Francisco flights
Kansai Intl to Los Angeles flights
Manila to Ontario flights
Singapore to Los Angeles flights
Hongqiao Intl to San Jose flights
Pu Dong to San Jose flights
Chennai to San Francisco flights
Ho Chi Minh City to Los Angeles flights
Capital to San Francisco flights
Incheon Intl to Las Vegas flights
Hyderabad to San Jose flights

Top 2 airlines flying from Southeast Asia to Ontario

Discover the top 2 airlines that operate flights from Southeast 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 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$708Average$858FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$774Average$780FlexibilityNo cancel feeOn-timeN/A

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.