What are the cheapest airlines flying from Bangkok to Ontario round-trip?

Cheapflights users have booked flights from Bangkok to Ontario return from ฿27,158. Other airlines that can offer you cheap pricing are China Airlines, from ฿27,810, and United Airlines, from ฿29,245. You may be able to fly from Bangkok to Ontario for 15% less than the average price by searching for these airlines. Find deals

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

฿16,562 is the cheapest one-way deal found within the past few days, from STARLUX Airlines. You may also be able to find cheap deals on China Airlines and United Airlines, with prices starting from ฿17,247 and ฿18,323, respectively. 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

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 54 days before your planned departure. Booking around this time can save you about 48% on the cost of this flight compared to booking a flight leaving this week. We have found prices from ฿27,876 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as ฿30,777.

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 ฿19,073.

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.

฿16,562+ Flights from Bangkok to Ontario

Cheap flight deals from Bangkok to Ontario

Round-trip from	฿27,158
One-way from	฿16,562
Popular in	July
Cheapest in	December
Average price	฿32,407

STARLUX Airlines
15/12-3/1
2 total stops
40h 55m total
Bangkok to Ontario

Search Deals

STARLUX Airlines
12/9
1 total stop
17h 55m total
Bangkok to Ontario

Search Deals

Highest demand for flights based on searches. 4% potential increase in price (฿52,151 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (฿16,152 potential savings vs. average return price).

Search Deals

Average for round-trip flights in June 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 18 June 2025.

Tue 16/1217:40BKK - ONT

1 stop37h 10mSTARLUX Airlines

Sat 3/121:45ONT - BKK

1 stop27h 45mSTARLUX Airlines

Deal found 17/6฿27,093

Mon 22/910:50BKK - ONT

1 stop21h 10mChina Airlines

Mon 29/900:10ONT - BKK

1 stop26h 10mChina Airlines

Deal found 17/6฿27,810

Tue 8/709:35BKK - ONT

2 stops46h 08mUnited Airlines

Mon 14/718:28ONT - BKK

2 stops39h 27mUnited Airlines

Deal found 18/6฿29,245

Sun 22/607:45BKK - ONT

2 stops24h 15mMultiple Airlines

Fri 4/700:45ONT - BKK

2 stops24h 00mMultiple Airlines

Deal found 17/6฿35,570

Tue 9/1202:00BKK - ONT

2 stops31h 17mQatar Airways

Thu 30/411:30ONT - BKK

2 stops28h 45mQatar Airways

Deal found 17/6฿39,874

Sat 28/602:35BKK - ONT

2 stops34h 11mKorean Air

Sun 13/706:25ONT - BKK

2 stops25h 20mKorean Air

Deal found 18/6฿53,926

Tue 12/802:35BKK - ONT

2 stops46h 15mเดลต้า

Wed 27/811:40ONT - BKK

2 stops44h 05mเดลต้า

Deal found 18/6฿54,512

Thu 26/602:00DMK - ONT

2 stops29h 05mMultiple Airlines

Wed 23/723:45ONT - DMK

1 stop22h 00mMultiple Airlines

Deal found 17/6฿205,008

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 18 June 2025.

Mon 15/1213:45BKK - ONT

1 stop17h 05mSTARLUX Airlines

Sat 3/121:45ONT - BKK

1 stop23h 50mSTARLUX Airlines

Deal found 18/6฿27,158

Mon 22/910:50BKK - ONT

1 stop21h 10mChina Airlines

Mon 29/900:10ONT - BKK

1 stop26h 10mChina Airlines

Deal found 17/6฿27,810

Tue 8/709:35BKK - ONT

2 stops46h 08mUnited Airlines

Mon 14/718:28ONT - BKK

2 stops39h 27mUnited Airlines

Deal found 18/6฿29,245

Fri 1/802:40BKK - ONT

1 stop30h 00mMultiple Airlines

Sat 9/823:45ONT - BKK

1 stop22h 15mMultiple Airlines

Deal found 18/6฿37,037

Tue 9/1202:00BKK - ONT

2 stops31h 17mQatar Airways

Thu 30/411:30ONT - BKK

2 stops28h 45mQatar Airways

Deal found 17/6฿39,874

Sat 28/602:35BKK - ONT

2 stops34h 11mKorean Air

Sun 13/706:25ONT - BKK

2 stops25h 20mKorean Air

Deal found 18/6฿53,926

Tue 12/802:35BKK - ONT

2 stops46h 15mเดลต้า

Wed 27/811:40ONT - BKK

2 stops44h 05mเดลต้า

Deal found 18/6฿54,512

Fri 22/802:55BKK - ONT

2 stops33h 35mเอทิฮัดแอร์เวย์

Wed 27/823:45ONT - BKK

2 stops40h 45mเอทิฮัดแอร์เวย์

Deal found 16/6฿96,570

Thu 10/718:25DMK - ONT

2 stops37h 15mMultiple Airlines

Sat 12/700:45ONT - DMK

1 stop21h 00mMultiple Airlines

Deal found 18/6฿214,137

Last-minute flights from Bangkok to Ontario
Discover last-minute flight deals from Bangkok to Ontario. Data last updated 18 June 2025 and is based on user searches.

Sun 22/617:50BKK - ONT

1 stop37h 15mSTARLUX Airlines

Sat 5/723:45ONT - BKK

1 stop26h 55mSTARLUX Airlines

Deal found 18/6฿28,560

Sun 22/607:45BKK - ONT

2 stops24h 15mMultiple Airlines

Fri 4/700:45ONT - BKK

2 stops24h 00mMultiple Airlines

Deal found 17/6฿35,570

Sun 22/621:05BKK - ONT

2 stops41h 08mQatar Airways

Sat 5/706:00ONT - BKK

2 stops34h 15mQatar Airways

Deal found 18/6฿43,688

Sun 22/620:55BKK - ONT

2 stops39h 04mเอทิฮัดแอร์เวย์

Sat 5/723:59ONT - BKK

2 stops52h 36mเอทิฮัดแอร์เวย์

Deal found 17/6฿87,442

Mon 23/609:35BKK - ONT

2 stops40h 39mUnited Airlines

Fri 4/713:19ONT - BKK

2 stops49h 16mUnited Airlines

Deal found 17/6฿119,523

Mon 23/613:10BKK - ONT

1 stop17h 55mSTARLUX Airlines

Fri 4/723:45ONT - BKK

1 stop22h 15mSTARLUX Airlines

Deal found 16/6฿131,814

Thu 26/602:00DMK - ONT

2 stops29h 05mMultiple Airlines

Wed 23/723:45ONT - DMK

1 stop22h 00mMultiple Airlines

Deal found 17/6฿205,008

Fri 27/613:10BKK - ONT

1 stop17h 55mMultiple Airlines

Tue 22/718:58ONT - BKK

2 stops27h 02mMultiple Airlines

Deal found 17/6฿150,561

Sat 28/602:40BKK - ONT

1 stop29h 20mChina Airlines

Sat 12/700:45ONT - BKK

1 stop25h 35mChina Airlines

Deal found 18/6฿30,256

Sat 28/602:35BKK - ONT

2 stops34h 11mKorean Air

Sun 13/706:25ONT - BKK

2 stops25h 20mKorean Air

Deal found 18/6฿53,926

Sat 28/602:30BKK - ONT

2 stops35h 43mQatar Airways

Sun 13/706:00ONT - BKK

2 stops34h 15mQatar Airways

Deal found 16/6฿55,262

Sat 28/602:35BKK - ONT

2 stops45h 50mเดลต้า

Sun 13/717:59ONT - BKK

2 stops39h 26mเดลต้า

Deal found 17/6฿56,795

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 18 June 2025.

Fri 12/913:10BKK - ONT

1 stop17h 55mSTARLUX Airlines

Deal found 16/6฿16,562

Tue 11/1102:35BKK - ONT

1 stop29h 15mChina Airlines

Deal found 18/6฿17,247

Mon 23/609:35BKK - ONT

2 stops46h 04mUnited Airlines

Deal found 18/6฿18,323

Wed 13/807:30DMK - ONT

2 stops24h 10mMultiple Airlines

Deal found 17/6฿18,747

Tue 12/814:40BKK - ONT

2 stops41h 00mMultiple Airlines

Deal found 17/6฿19,008

Wed 5/1103:00BKK - ONT

2 stops35h 30mQatar Airways

Deal found 17/6฿23,083

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 15/12

13:45-15:50

1 stop17h 05m

Ontario

Sat 3/1

21:45-12:35

1 stop23h 50m

฿27,158

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 22/9

10:50-18:00

1 stop21h 10m

Ontario

Mon 29/9

00:10-16:20

1 stop26h 10m

฿27,810

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Tue 8/7

09:35-17:43

2 stops46h 08m

Ontario

Mon 14/7

18:28-23:55

2 stops39h 27m

฿29,245

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Fri 1/8

02:40-18:40

1 stop30h 00m

Ontario

Sat 9/8

23:45-12:00

1 stop22h 15m

฿37,037

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Tue 9/12

02:00-18:17

2 stops31h 17m

Ontario

Thu 30/4

11:30-06:15

2 stops28h 45m

฿39,874

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sat 28/6

02:35-22:46

2 stops34h 11m

Ontario

Sun 13/7

06:25-21:45

2 stops25h 20m

฿53,926

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Tue 12/8

02:35-10:50

2 stops46h 15m

Ontario

Wed 27/8

11:40-21:45

2 stops44h 05m

฿54,512

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Fri 22/8

02:55-22:30

2 stops33h 35m

Ontario

Wed 27/8

23:45-06:30

2 stops40h 45m

฿96,570

BangkokOntario

DMK - ONT

DMKONT

Bangkok Don Mueang Intl

Thu 10/7

18:25-17:40

2 stops37h 15m

Ontario

Sat 12/7

00:45-11:45

1 stop21h 00m

฿214,137

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Fri 12/9

13:10-17:05

1 stop17h 55m

฿16,562

Flights are sorted by cheapest return flights first.

Deals found on 16/6

Showing 1-10 of 15 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

Rainfall in Ontario by month

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.

Temperature in Ontario 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 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).

Reviews of airlines servicing Ontario

To help decide which airline to fly from Bangkok to Ontario, see what other customers have to say about STARLUX Airlines, Korean Air and China Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

STARLUX Airlines

9.1

Wonderful

Check prices

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

STARLUX Airlines

9.1

Wonderful

Check prices

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

Check prices

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

Check prices

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.

เดลต้า

8.0

Very Good

7,964 reviews

STARLUX Airlines

9.1

Wonderful

Check prices

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.

Qatar Airways

7.4

Good

3,590 reviews

STARLUX Airlines

9.1

Wonderful

Check prices

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

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.
What are the cheapest airlines flying from Bangkok to Ontario round-trip?
Cheapflights users have booked flights from Bangkok to Ontario return from ฿27,158. Other airlines that can offer you cheap pricing are China Airlines, from ฿27,810, and United Airlines, from ฿29,245. You may be able to fly from Bangkok to Ontario for 15% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Bangkok to Ontario one-way?
฿16,562 is the cheapest one-way deal found within the past few days, from STARLUX Airlines. You may also be able to find cheap deals on China Airlines and United Airlines, with prices starting from ฿17,247 and ฿18,323, respectively.
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฿27,154	Average฿30,183	FlexibilityNo cancel fee	On-time70%	Search China Airlines flights

Fly with Cheapflights

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Bangkok to Ontario. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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?

Yes! Cheapflights helps users easily find flights from Bangkok to Ontario with no change fees.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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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.

Cheap flights from Bangkok to Ontario from ฿16,562

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 12/9. 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 18 June 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 18 June 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

Rainfall in Ontario by month

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

Temperature in Ontario by month

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

Reviews of airlines servicing Ontario

To help decide which airline to fly from Bangkok to Ontario, see what other customers have to say about STARLUX Airlines, Korean Air and China Airlines. Reviews also offer insight into each airline's 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?

What are the cheapest airlines flying from Bangkok to Ontario round-trip?

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

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?

100% Free

Book with Flexibility

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 18 June 2025.