Asia

$298+ 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 3/31. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Mrz 19 — Mrz 261
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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 Februar 17, 2026.

This Delta deal was found by Cheapflights users on 2/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
So 8/237:00 am
ONT
-
BKK
2 stops26h 35m
Delta
Sa 9/52:35 am
BKK
-
ONT
2 stops35h 09m
Delta
Deal found 2/17$611
This Korean Air deal was found by Cheapflights users on 2/14. 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.
Mi 3/186:00 am
ONT
-
BKK
2 stops28h 45m
Korean Air
So 5/1711:30 pm
BKK
-
ONT
2 stops31h 40m
Korean Air
Deal found 2/14$617
This Delta deal was found by Cheapflights users on 2/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Di 10/137:00 am
ONT
-
SIN
2 stops31h 00m
Delta
So 11/110:30 pm
SIN
-
ONT
2 stops40h 13m
Delta
Deal found 2/16$636
This Korean Air deal was found by Cheapflights users on 2/17. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Do 8/207:00 am
ONT
-
SIN
2 stops25h 55m
Korean Air
Mi 9/161:25 am
SIN
-
ONT
2 stops36h 15m
Korean Air
Deal found 2/17$641
This Delta deal was found by Cheapflights users on 2/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fr 8/217:00 am
ONT
-
BKK
2 stops24h 45m
Delta
Di 9/89:50 am
BKK
-
ONT
2 stops27h 54m
Delta
Deal found 2/17$641
This Korean Air deal was found by Cheapflights users on 2/17. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fr 11/137:00 am
ONT
-
BKK
2 stops23h 30m
Korean Air
Mi 11/259:40 am
BKK
-
ONT
2 stops46h 37m
Korean Air
Deal found 2/17$647
This Delta deal was found by Cheapflights users on 2/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Di 11/37:00 am
ONT
-
BKK
2 stops39h 25m
Delta
Mo 11/1611:15 pm
BKK
-
ONT
2 stops33h 02m
Delta
Deal found 2/16$661
This Korean Air deal was found by Cheapflights users on 2/14. 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.
Di 2/177:30 am
ONT
-
BKK
2 stops26h 15m
Multiple Airlines
Mi 3/42:05 am
BKK
-
ONT
2 stops26h 49m
Multiple Airlines
Deal found 2/14$666
This Delta deal was found by Cheapflights users on 2/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Di 2/173:30 pm
ONT
-
BKK
2 stops42h 25m
Delta
Mi 3/412:55 am
BKK
-
ONT
2 stops36h 42m
Delta
Deal found 2/16$667
This SmartFares deal was found by Cheapflights users on 2/13. 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.
Di 3/3112:10 am
ONT
-
TPE
Nonstop14h 05m
China Airlines
Di 6/309:10 pm
TPE
-
ONT
Nonstop11h 50m
China Airlines
Deal found 2/13$668
This Delta deal was found by Cheapflights users on 2/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mi 2/186:00 am
ONT
-
TPE
2 stops23h 05m
Delta
Di 3/109:55 am
TPE
-
ONT
2 stops28h 56m
Delta
Deal found 2/16$669
This Delta deal was found by Cheapflights users on 2/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sa 4/257:00 am
ONT
-
BKK
2 stops26h 35m
Delta
Fr 5/229:40 pm
BKK
-
ONT
2 stops33h 30m
Delta
Deal found 2/16$670

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 Februar 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$611
(Delta)

One-way from

$298
(Ucuzabilet)

Popular in

December

Cheapest in

September

Average price

$760

Good round-trip deal

$710 or less

Good one-way deal

$408 or less
Provider with most accurate pricing for Los Angeles-Manila Ninoy Aquino Intl flight deals.
Provider most trusted by Cheapflights users for Los Angeles-Manila Ninoy Aquino Intl flights.
From Ontario to Asia
One-way flight from Ontario to Asia
Highest demand for flights based on searches. 5% potential increase in price ($56 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Average for round-trip flights in February 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 Februar 17, 2026.
Use the filters below to find and compare flights from Ontario to Asia that are best for you.

Fly from

Ontario

Fly to

Asia

Route

Depart

Return

Price

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mi 5/6

7:00 am-9:45 pm

2 stops24h 45m

Bangkok Suvarnabhumi

Mi 5/13

11:30 pm-5:10 pm

2 stops31h 40m

$617

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sa 4/25

7:00 am-11:35 pm

2 stops26h 35m

Bangkok Suvarnabhumi

Fr 5/22

9:40 pm-5:10 pm

2 stops33h 30m

$670

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Do 4/16

12:10 am-5:15 am

Nonstop14h 05m

Taipei City Taiwan Taoyuan Intl

Mo 4/20

9:10 pm-6:00 pm

Nonstop11h 50m

$675

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Do 4/16

12:10 am-5:15 am

Nonstop14h 05m

Taipei City Taiwan Taoyuan Intl

Mi 6/10

9:10 pm-6:00 pm

Nonstop11h 50m

$675

OntarioManila

ONT - MNL

ONTMNL

Ontario

Mo 5/4

6:59 pm-5:55 am

1 stop19h 56m

Manila Ninoy Aquino Intl

Mo 6/8

9:20 pm-10:37 pm

1 stop16h 17m

$693

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Di 4/14

7:00 am-9:45 pm

2 stops24h 45m

Bangkok Suvarnabhumi

Mo 4/27

11:30 pm-5:15 pm

2 stops31h 45m

$695

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Di 7/7

7:00 am-11:35 pm

2 stops26h 35m

Bangkok Suvarnabhumi

Mi 7/22

11:30 pm-5:16 pm

2 stops31h 46m

$695

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Do 4/23

7:00 am-11:35 pm

2 stops26h 35m

Bangkok Suvarnabhumi

Mi 4/29

9:40 pm-5:15 pm

2 stops33h 35m

$695

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Di 3/17

6:00 am-10:25 pm

2 stops26h 25m

Ho Chi Minh City

Fr 4/17

7:30 am-5:15 pm

2 stops23h 45m

$705

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

So 3/22

6:00 am-11:20 pm

2 stops27h 20m

Ho Chi Minh City

Fr 4/17

7:30 am-5:15 pm

2 stops23h 45m

$705

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/16

Showing 1-10 of 60 results
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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, February is the cheapest month in which you can book a flight from Ontario to Asia (average of $318). Flying from Ontario to Asia in June is currently the most expensive (average of $489). 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 Februar 17, 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 Februar 17, 2026.
Read reviews from past customers who have flown STARLUX Airlines, Korean Air, and China 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.

Overall

8.9

Food

8.7

Boarding

8.9

Entertainment

8.8

Comfort

8.9

Crew

9.2

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.

Overall

8.9

Food

8.7

Boarding

8.9

Entertainment

8.8

Comfort

8.9

Crew

9.2

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.

Overall

8.9

Food

8.7

Boarding

8.9

Entertainment

8.8

Comfort

8.9

Crew

9.2

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.

Overall

8.9

Food

8.7

Boarding

8.9

Entertainment

8.8

Comfort

8.9

Crew

9.2

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.

Overall

8.9

Food

8.7

Boarding

8.9

Entertainment

8.8

Comfort

8.9

Crew

9.2

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.

Overall

8.9

Food

8.7

Boarding

8.9

Entertainment

8.8

Comfort

8.9

Crew

9.2

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 12h 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?

    $330 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Korean Air and Alaska Airlines, with prices starting from $341 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, February is the cheapest month in which you can book a flight from Ontario to Asia (average of $318). Flying from Ontario to Asia in June is currently the most expensive (average of $489). 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 10 airlines flying from Ontario to Asia

Discover the top 10 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 Februar 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$457Average$853FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$486Average$1,071FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$616Average$778FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$647Average$728FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$648Average$967FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$649Average$1,029FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$712Average$983FlexibilityNo cancel feeOn-time71%
Philippine AirlinesCheapest$767Average$1,312FlexibilityNo cancel feeOn-time60%
Hawaiian AirlinesCheapest$892Average$1,443FlexibilityNo cancel feeOn-time85%
Cathay PacificCheapest$938Average$1,216FlexibilityNo cancel feeOn-time72%

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