How long is the flight from Bangkok to Ontario?

STARLUX Airlines and China Airlines can get you from Bangkok to Ontario in just under 17h 45m. Your travel time can differ by up to 20h 15m. There are 13325 km between Bangkok and Ontario. This flight may include one or multiple stops. Find deals

What is the cheapest airline to fly from Bangkok to Ontario round-trip?

Cheapflights users have booked flights from Bangkok to Ontario return from ฿26,452. You may be able to fly from Bangkok to Ontario for 12% less than the average price by searching for this airline. Find deals

What is the cheapest day to fly from Bangkok to Ontario?

Travellers seeking maximum savings on their Bangkok to Ontario flight should consider departing on Tuesday mornings when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time. Find deals

In terms of precipitation, rainfall in Ontario ranges from 3.0 - 86.0 inches per month. February is typically the wettest month, when rainfall can reach 86.0 mm. June is typically the driest time to visit Ontario when rainfall is around 3.0 mm.

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 26.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 12.0 C).

What is the cheapest day to fly return from Bangkok to Ontario?

Flying to your destination on a Tuesday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to Ontario. Check prices with Cheapflights to find a great deal for your trip.

How far in advance should I book a flight from Bangkok to Ontario?

To save on the cost of your flight from Bangkok to Ontario, book at least 59 days before your planned departure. Booking around this time can save you about 32% on the cost of this flight compared to booking a flight leaving this week. We have found prices from ฿22,073 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as ฿29,981.

What is the cheapest month to fly from Bangkok to Ontario?

Flights from Bangkok to Ontario lean towards being more expensive in August. Prices are generally better when you fly from Bangkok to Ontario in October, with the cheapest ticket starting at ฿18,802.

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

It’s optimal to fly from Bangkok to Ontario at midday. By choosing this option you can save up to 11% on the cost of your flight, compared to a flight in the morning.

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

If you book a flight to Ontario from Bangkok, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 4.9 km from the centre of Ontario. There are 0 flights from Bangkok to Ontario per day from 1 airline.

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

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

How can I find direct flights from Bangkok to Ontario?

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

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

Yes. Cheapflights offers flight deals from Bangkok 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.

฿14,482+ Cheap Flights from Bangkok to Ontario

Q: How much does it cost for a return flight from Bangkok to Ontario?

Airfare is below average for this route at the moment. Bangkok to Ontario flights typically cost between ฿27,885 and ฿28,901 in March. The cheapest return flight price found within the last 3 days was ฿25,567 on STARLUX Airlines (4 Mar-11 Mar). Find deals

Cheap flight deals from Bangkok to Ontario

Round-trip from	฿25,567
One-way from	฿14,482
Popular in	November
Cheapest in	August
Average price	฿28,012

STARLUX Airlines
4/3-11/3
2 total stops
41h 35m total
Bangkok to Ontario

Search Deals

15/11
2 total stops
39h 45m total
Bangkok to Ontario

Search Deals

High demand for flights, 0% potential price rise

Search Deals

Cheapest flight prices on average. 0% potential price decrease (฿9,516 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Find flight deals from Bangkok to Ontario

Cheapest flights from Bangkok to Ontario
Explore the most affordable flight options available from Bangkok to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 September 2025.

Sat 13/913:10BKK - ONT

1 stop17h 55mSTARLUX Airlines

Sat 20/923:10ONT - BKK

1 stop27h 30mSTARLUX Airlines

Deal found 9/9฿25,567

Thu 13/1117:40BKK - ONT

1 stop37h 50mSTARLUX Airlines

Sat 22/1121:45ONT - BKK

1 stop27h 45mSTARLUX Airlines

Deal found 10/9฿25,662

Mon 20/1013:10BKK - ONT

1 stop17h 55mSTARLUX Airlines

Mon 12/121:45ONT - BKK

1 stop23h 50mSTARLUX Airlines

Deal found 9/9฿25,757

Fri 10/1017:50BKK - ONT

1 stop37h 15mSTARLUX Airlines

Mon 5/121:45ONT - BKK

1 stop27h 45mSTARLUX Airlines

Deal found 9/9฿26,202

Fri 3/1013:10BKK - ONT

1 stop17h 55mSTARLUX Airlines

Fri 17/1023:10ONT - BKK

1 stop27h 30mSTARLUX Airlines

Deal found 10/9฿26,424

Thu 16/1010:50BKK - ONT

1 stop21h 10mChina Airlines

Thu 30/1023:50ONT - BKK

1 stop35h 45mChina Airlines

Deal found 9/9฿27,123

Sat 20/910:50BKK - ONT

1 stop21h 10mChina Airlines

Thu 2/1000:10ONT - BKK

1 stop35h 15mChina Airlines

Deal found 10/9฿27,250

Sat 13/910:50BKK - ONT

1 stop21h 50mChina Airlines

Fri 19/900:10ONT - BKK

1 stop26h 10mChina Airlines

Deal found 10/9฿27,377

Thu 11/1214:05BKK - ONT

1 stop17h 45mChina Airlines

Thu 26/323:50ONT - BKK

1 stop20h 00mChina Airlines

Deal found 10/9฿27,409

Thu 2/1002:40BKK - ONT

1 stop29h 20mChina Airlines

Thu 16/1000:10ONT - BKK

1 stop26h 10mChina Airlines

Deal found 10/9฿27,472

Sun 19/1002:40BKK - ONT

1 stop29h 20mChina Airlines

Mon 12/122:50ONT - BKK

1 stop23h 15mChina Airlines

Deal found 10/9฿27,695

Sat 13/906:40DMK - ONT

2 stops26h 00mMultiple Airlines

Fri 19/900:10ONT - DMK

2 stops32h 35mMultiple Airlines

Deal found 9/9฿33,094

Best flights from Bangkok to Ontario
Discover carefully curated flight deals from Bangkok to Ontario that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 September 2025.

Wed 4/313:45BKK - ONT

1 stop17h 45mSTARLUX Airlines

Wed 11/322:45ONT - BKK

1 stop23h 50mSTARLUX Airlines

Deal found 9/9฿25,567

Tue 13/117:50BKK - ONT

1 stop38h 00mChina Airlines

Tue 17/222:50ONT - BKK

1 stop26h 55mChina Airlines

Deal found 9/9฿27,250

Thu 13/1117:40BKK - ONT

1 stop37h 50mSTARLUX Airlines

Sat 22/1121:45ONT - BKK

1 stop27h 45mSTARLUX Airlines

Deal found 10/9฿25,662

Sat 20/902:40BKK - ONT

1 stop29h 20mChina Airlines

Sun 5/1000:10ONT - BKK

1 stop19h 35mChina Airlines

Deal found 10/9฿27,250

Mon 20/1013:10BKK - ONT

1 stop17h 55mSTARLUX Airlines

Mon 12/121:45ONT - BKK

1 stop23h 50mSTARLUX Airlines

Deal found 9/9฿25,757

Mon 6/1017:30BKK - ONT

1 stop38h 30mChina Airlines

Fri 31/1023:50ONT - BKK

1 stop26h 55mChina Airlines

Deal found 9/9฿27,250

Sat 20/910:50BKK - ONT

1 stop21h 10mChina Airlines

Thu 2/1000:10ONT - BKK

1 stop35h 15mChina Airlines

Deal found 10/9฿27,250

Thu 11/1214:05BKK - ONT

1 stop17h 45mChina Airlines

Thu 26/323:50ONT - BKK

1 stop20h 00mChina Airlines

Deal found 10/9฿27,409

Thu 2/1002:40BKK - ONT

1 stop29h 20mChina Airlines

Thu 16/1000:10ONT - BKK

1 stop26h 10mChina Airlines

Deal found 10/9฿27,472

Last-minute flights from Bangkok to Ontario
Discover last-minute flight deals from Bangkok to Ontario. Data last updated 10 September 2025 and is based on user searches.

Sat 13/913:10BKK - ONT

1 stop17h 55mSTARLUX Airlines

Sat 20/923:10ONT - BKK

1 stop27h 30mSTARLUX Airlines

Deal found 9/9฿25,567

Sat 13/910:50BKK - ONT

1 stop21h 50mChina Airlines

Fri 19/900:10ONT - BKK

1 stop26h 10mChina Airlines

Deal found 10/9฿27,377

Sat 13/906:40DMK - ONT

2 stops26h 00mMultiple Airlines

Fri 19/900:10ONT - DMK

2 stops32h 35mMultiple Airlines

Deal found 9/9฿33,094

Sat 20/910:50BKK - ONT

1 stop21h 10mChina Airlines

Thu 2/1000:10ONT - BKK

1 stop35h 15mChina Airlines

Deal found 10/9฿27,250

Sat 20/913:10BKK - ONT

1 stop17h 55mSTARLUX Airlines

Fri 3/1023:10ONT - BKK

1 stop22h 50mSTARLUX Airlines

Deal found 10/9฿27,790

Thu 2/1002:40BKK - ONT

1 stop29h 20mChina Airlines

Thu 16/1000:10ONT - BKK

1 stop26h 10mChina Airlines

Deal found 10/9฿27,472

Fri 3/1013:10BKK - ONT

1 stop17h 55mSTARLUX Airlines

Fri 17/1023:10ONT - BKK

1 stop27h 30mSTARLUX Airlines

Deal found 10/9฿26,424

Fri 10/1017:50BKK - ONT

1 stop37h 15mSTARLUX Airlines

Mon 5/121:45ONT - BKK

1 stop27h 45mSTARLUX Airlines

Deal found 9/9฿26,202

Thu 16/1010:50BKK - ONT

1 stop21h 10mChina Airlines

Thu 30/1023:50ONT - BKK

1 stop35h 45mChina Airlines

Deal found 9/9฿27,123

Sun 19/1002:40BKK - ONT

1 stop29h 20mChina Airlines

Mon 12/122:50ONT - BKK

1 stop23h 15mChina Airlines

Deal found 10/9฿27,695

Mon 20/1013:10BKK - ONT

1 stop17h 55mSTARLUX Airlines

Mon 12/121:45ONT - BKK

1 stop23h 50mSTARLUX Airlines

Deal found 9/9฿25,757

Wed 22/1013:10BKK - ONT

1 stop17h 55mSTARLUX Airlines

Fri 14/1121:45ONT - BKK

1 stop27h 45mSTARLUX Airlines

Deal found 9/9฿27,853

One-way flights from Bangkok to Ontario
Search for one-way flight options from Bangkok to Ontario. Find affordable one-way fares based on user searches. Data last updated 10 September 2025.

Sat 15/1122:55BKK - ONT

2 stops39h 45mMultiple Airlines

Deal found 9/9฿14,482

Thu 13/1122:55BKK - ONT

2 stops39h 55mMultiple Airlines

Deal found 9/9฿14,514

Mon 10/1113:20BKK - ONT

2 stops25h 30mMultiple Airlines

Deal found 9/9฿15,022

Sun 19/1009:20DMK - ONT

3 stops39h 48mMultiple Airlines

Deal found 9/9฿15,022

Fri 31/1013:20BKK - ONT

2 stops24h 30mMultiple Airlines

Deal found 10/9฿15,086

Sun 19/1010:25BKK - ONT

3 stops38h 43mMultiple Airlines

Deal found 9/9฿15,118

Mon 20/1013:30BKK - ONT

2 stops24h 42mMultiple Airlines

Deal found 9/9฿15,276

Thu 16/1013:30BKK - ONT

2 stops24h 37mMultiple Airlines

Deal found 9/9฿15,340

Wed 15/1023:20BKK - ONT

2 stops38h 47mMultiple Airlines

Deal found 9/9฿15,372

Sun 9/1123:35BKK - ONT

2 stops39h 15mMultiple Airlines

Deal found 9/9฿15,467

Sun 21/922:45BKK - ONT

2 stops38h 53mMultiple Airlines

Deal found 9/9฿15,499

Wed 5/1106:15DMK - ONT

3 stops56h 25mMultiple Airlines

Deal found 10/9฿16,515

Fly from

Fly to

Route

Depart

Return

Price

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 4/3

13:45-16:30

1 stop17h 45m

Ontario

Wed 11/3

22:45-12:35

1 stop23h 50m

฿25,567

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Thu 13/11

17:40-16:30

1 stop37h 50m

Ontario

Sat 22/11

21:45-16:30

1 stop27h 45m

฿25,662

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 20/10

13:10-17:05

1 stop17h 55m

Ontario

Mon 12/1

21:45-12:35

1 stop23h 50m

฿25,757

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Tue 13/1

17:50-16:50

1 stop38h 00m

Ontario

Tue 17/2

22:50-16:45

1 stop26h 55m

฿27,250

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sat 20/9

02:40-18:00

1 stop29h 20m

Ontario

Sun 5/10

00:10-09:45

1 stop19h 35m

฿27,250

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 6/10

17:30-18:00

1 stop38h 30m

Ontario

Fri 31/10

23:50-16:45

1 stop26h 55m

฿27,250

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sat 20/9

10:50-18:00

1 stop21h 10m

Ontario

Thu 2/10

00:10-01:25

1 stop35h 15m

฿27,250

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Thu 11/12

14:05-16:50

1 stop17h 45m

Ontario

Thu 26/3

23:50-09:50

1 stop20h 00m

฿27,409

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Thu 2/10

02:40-18:00

1 stop29h 20m

Ontario

Thu 16/10

00:10-16:20

1 stop26h 10m

฿27,472

BangkokOntario

DMK - ONT

DMKONT

Bangkok Don Mueang Intl

Sun 19/10

09:20-11:08

3 stops39h 48m

฿15,022

Flights are sorted by cheapest return flights first.

Deals found on 9/9

Showing 1-10 of 27 results

Best time to book a flight from Bangkok to Ontario

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

How much does it cost for a return flight from Bangkok to Ontario?

Reviews of airlines servicing Ontario

Check out reviews from past customers who have flown with China Airlines from Bangkok to Ontario to help guide your decision. 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

767 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.

China Airlines

8.3

Very Good

767 reviews

China Airlines

8.3

Very Good

767 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,Jul 2025

SFO - TPE

Related info for your journey

What airport do you fly into for flights to Ontario from Bangkok?
If you book a flight to Ontario from Bangkok, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 4.9 km from the centre of Ontario. There are 0 flights from Bangkok to Ontario per day from 1 airline.
How long is the flight from Bangkok to Ontario?
STARLUX Airlines and China Airlines can get you from Bangkok to Ontario in just under 17h 45m. Your travel time can differ by up to 20h 15m. There are 13325 km between Bangkok and Ontario. This flight may include one or multiple stops.
What is the cheapest airline to fly from Bangkok to Ontario round-trip?
Cheapflights users have booked flights from Bangkok to Ontario return from ฿26,452. You may be able to fly from Bangkok to Ontario for 12% less than the average price by searching for this airline.
Can I find deals for flights from Bangkok to Ontario that include hotel bookings?
Yes. In addition to deals on Bangkok to Ontario flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Bangkok to Ontario?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Bangkok to Ontario.
Can I find deals for business class flights from Bangkok to Ontario?
Yes. Cheapflights offers flight deals from Bangkok 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Bangkok to Ontario

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Top airline flying from Bangkok to Ontario

Airline	Cheapest	Average	Flexibility	On-time
China Airlines	Cheapest฿26,452	Average฿29,071	FlexibilityNo cancel fee	On-time70%	Search China Airlines flights

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How does Cheapflights help users find flights from Bangkok to Ontario?

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Why should you use Cheapflights to find cheap flight tickets from Bangkok to Ontario?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Bangkok to Ontario for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Bangkok to Ontario with no change fees?

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Cheap flights from Bangkok to Ontario from ฿14,482

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.

Cheap flight deals from Bangkok to Ontario

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Bangkok to Ontario

Cheapest flights from Bangkok to OntarioExplore the most affordable flight options available from Bangkok to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 September 2025.

Explore the most affordable flight options available from Bangkok to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Bangkok to Ontario that are best for you.

Best time to book a flight from Bangkok to Ontario

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

Cheapflights Insights

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

How much does it cost for a return flight from Bangkok to Ontario?

Reviews of airlines servicing Ontario

Check out reviews from past customers who have flown with China Airlines from Bangkok to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Bangkok 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 Bangkok?

How long is the flight from Bangkok to Ontario?

What is the cheapest airline to fly from Bangkok to Ontario round-trip?

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

How can I find direct flights from Bangkok to Ontario?

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

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 Bangkok to Ontario

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

Top airline flying from Bangkok to Ontario

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Bangkok to Ontario?

Why should you use Cheapflights to find cheap flight tickets from Bangkok to Ontario?

Can Cheapflights find flights from Bangkok to Ontario with no change fees?

Can Cheapflights notify me if prices for flights from Bangkok to Ontario become cheaper?

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Travel Smart

Cheapest flights from Bangkok to Ontario
Explore the most affordable flight options available from Bangkok to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 September 2025.