Asia

$304+ Cheap flights from Ontario (ONT) to Asia

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 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Apr 9 — Apr 161
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Cheap flight deals from Ontario to Asia

Cheapest flights from Ontario to Asia
Explore the most affordable flight options available from Ontario to Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 10, 2026.

This lol.travel deal was found by Cheapflights users on 3/10. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/277:00 am
ONT
-
BKK
2 stops26h 35m
Korean Air
Tue 5/1211:30 pm
BKK
-
ONT
2 stops31h 40m
Korean Air
Deal found 3/10$567
This Delta deal was found by Cheapflights users on 3/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:00 am
ONT
-
BKK
2 stops25h 45m
Delta
Mon 9/289:50 am
BKK
-
ONT
2 stops26h 50m
Delta
Deal found 3/9$611
This Delta deal was found by Cheapflights users on 3/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/195:05 pm
ONT
-
BKK
2 stops40h 30m
Delta
Mon 4/279:40 pm
BKK
-
ONT
2 stops33h 35m
Delta
Deal found 3/9$616
This Delta deal was found by Cheapflights users on 3/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/65:55 pm
ONT
-
BKK
2 stops37h 50m
Delta
Wed 9/309:50 am
BKK
-
ONT
2 stops26h 50m
Delta
Deal found 3/9$617
This Korean Air deal was found by Cheapflights users on 3/9. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:00 am
ONT
-
BKK
2 stops24h 45m
Korean Air
Sat 9/2611:30 pm
BKK
-
ONT
2 stops31h 46m
Korean Air
Deal found 3/9$641
This Delta deal was found by Cheapflights users on 3/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/55:05 pm
ONT
-
BKK
2 stops38h 40m
Delta
Wed 9/309:50 am
BKK
-
ONT
2 stops26h 50m
Delta
Deal found 3/9$642
This Bravofly deal was found by Cheapflights users on 3/6. 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 Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/207:00 am
ONT
-
BKK
2 stops24h 45m
Korean Air
Mon 4/279:40 pm
BKK
-
ONT
2 stops33h 35m
Korean Air
Deal found 3/6$643
This Delta deal was found by Cheapflights users on 3/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/65:05 pm
ONT
-
BKK
2 stops38h 40m
Delta
Sat 9/262:35 am
BKK
-
ONT
2 stops46h 39m
Delta
Deal found 3/9$648
This Delta deal was found by Cheapflights users on 3/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:00 am
ONT
-
BKK
2 stops25h 45m
Delta
Mon 9/289:50 am
BKK
-
ONT
2 stops26h 50m
Delta
Deal found 3/9$661
This SmartFares deal was found by Cheapflights users on 3/6. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/257:00 am
ONT
-
BKK
2 stops24h 45m
Korean Air
Sun 9/62:35 am
BKK
-
ONT
2 stops28h 41m
Korean Air
Deal found 3/6$664
This Vliegwinkel deal was found by Cheapflights users on 3/7. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/812:10 am
ONT
-
TPE
Nonstop14h 05m
China Airlines
Wed 4/229:10 pm
TPE
-
ONT
Nonstop11h 50m
China Airlines
Deal found 3/7$666
This Korean Air deal was found by Cheapflights users on 3/9. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:00 am
ONT
-
BKK
2 stops24h 45m
Korean Air
Sun 9/2711:30 pm
BKK
-
ONT
2 stops31h 46m
Korean Air
Deal found 3/9$666

Find flight deals from Ontario to Asia

Keep the following information in mind while searching for Ontario to Asia flight deals. Data was last updated March 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$586
(lol.travel)

One-way from

$304
(SmartFares)

Popular in

December

Cheapest in

September

Average price

$738

Good round-trip deal

$732 or less

Good one-way deal

$421 or less
Provider with most accurate pricing for Ontario-Manila Ninoy Aquino Intl flight deals.
Provider most trusted by Cheapflights users for Ontario-Manila Ninoy Aquino Intl flights.
From Ontario to Asia
One-way flight from Ontario to Asia
Highest demand for flights based on searches. 6% potential increase in price ($63 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
Average for round-trip flights in March 2026
Price to beat on a round-trip flight from Ontario to Asia.
Price to beat on a one-way flight from Ontario to Asia.

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Asia 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 March 10, 2026.
Use the filters below to find and compare flights from Ontario to Asia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioManila

ONT - MNL

ONTMNL

Ontario

Sun 5/3

7:00 am-10:55 am

2 stops36h 55m

Manila Ninoy Aquino Intl

Sun 5/17

11:30 pm-5:10 pm

2 stops32h 40m

$701

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Tue 9/1

7:00 am-12:35 pm

2 stops39h 35m

Ho Chi Minh City

Wed 11/18

11:50 pm-10:43 pm

2 stops37h 53m

$736
Quickest round-trip

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Wed 4/29

12:10 am-5:15 am

Nonstop14h 05m

Taipei City Taiwan Taoyuan Intl

Sat 5/16

9:10 pm-6:00 pm

Nonstop11h 50m

$738

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Mon 4/27

11:53 am-7:55 pm

1 stop17h 02m

Taipei City Taiwan Taoyuan Intl

Sat 5/2

9:40 am-11:13 am

1 stop16h 33m

$748

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Thu 4/2

6:00 am-7:55 pm

1 stop22h 55m

Taipei City Taiwan Taoyuan Intl

Fri 4/17

9:35 am-11:13 am

1 stop16h 38m

$748

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Thu 5/7

11:52 am-7:55 pm

1 stop17h 03m

Taipei City Taiwan Taoyuan Intl

Thu 6/18

9:50 am-11:14 am

1 stop16h 24m

$748

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Tue 4/7

6:00 am-7:55 pm

2 stops22h 55m

Taipei City Taiwan Taoyuan Intl

Tue 4/14

9:40 am-11:13 am

1 stop16h 33m

$752

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Mon 5/4

11:53 am-7:55 pm

1 stop17h 02m

Taipei City Taiwan Taoyuan Intl

Sat 5/23

9:40 am-12:19 pm

2 stops17h 39m

$753

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Tue 5/12

6:00 am-7:55 pm

2 stops22h 55m

Taipei City Taiwan Taoyuan Intl

Sun 5/31

9:35 am-12:35 pm

1 stop18h 00m

$753

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 5/12

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

Mon 6/1

1:20 pm-6:00 pm

1 stop18h 40m

$782

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Ontario to Asia

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

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

Currently, October is the cheapest month in which you can book a flight from Ontario to Asia (average of $361). Flying from Ontario to Asia in June is currently the most expensive (average of $481). 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 ONT to AS?

Find hourly flight availability from Ontario to Asia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 10, 2026.

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

Reviews of airlines servicing Asia

Get insights into the airlines that provide service to Asia. 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 Asia. Reviews last updated March 10, 2026.
Read reviews from past customers who have flown STARLUX Airlines,Korean Air, andChina Airlines from Ontario to Asia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Comfort

8.9

Boarding

8.9

Crew

9.2

Food

8.7

Entertainment

8.8

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

Comfort

8.9

Boarding

8.9

Crew

9.2

Food

8.7

Entertainment

8.8

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

Comfort

8.9

Boarding

8.9

Crew

9.2

Food

8.7

Entertainment

8.8

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

Comfort

8.9

Boarding

8.9

Crew

9.2

Food

8.7

Entertainment

8.8

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

Comfort

8.9

Boarding

8.9

Crew

9.2

Food

8.7

Entertainment

8.8

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

Comfort

8.9

Boarding

8.9

Crew

9.2

Food

8.7

Entertainment

8.8

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Asia. 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 from for flights from Ontario to Asia?

    If you book a flight to Asia from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • How long is the flight from Ontario to Asia?

    Korean Air, Delta, and China Airlines can get you from Ontario to Asia in just under 14h 05m. Your travel time can differ by up to 25h 30m. Airlines will cover a distance of 6814 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $316 is the cheapest one-way deal found within the past few days, from Korean Air. You may also be able to find cheap deals on Delta and Alaska Airlines, with prices starting from $330 and $356, respectively.

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

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Ontario to Asia (average of $361). Flying from Ontario to Asia in June is currently the most expensive (average of $481). 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

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Alternative routes for Ontario to Asia

See prices for flight routes from nearby airports that may be better suited for you.

Top 9 airlines flying from Ontario to Asia

Discover the top 9 airlines that operate flights from Ontario to Asia. 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 March 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$457Average$853FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$604Average$1,024FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$616Average$775FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$644Average$942FlexibilityNo cancel feeOn-time70%
Asiana AirlinesCheapest$647Average$779FlexibilityNo cancel feeOn-time76%
STARLUX AirlinesCheapest$650Average$1,026FlexibilityNo cancel feeOn-timeN/A
Philippine AirlinesCheapest$767Average$1,312FlexibilityNo cancel feeOn-time60%
American AirlinesCheapest$783Average$975FlexibilityNo cancel feeOn-time71%
Cathay PacificCheapest$1,138Average$1,216FlexibilityNo cancel feeOn-time72%

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