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

Cheapflights users have booked flights from Bangkok to Ontario return from ฿26,440. Other airlines that can offer you cheap pricing are China Airlines, from ฿27,344, and United Airlines, from ฿28,990. You may be able to fly from Bangkok to Ontario for 17% 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?

฿16,271 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 ฿16,561 and ฿18,111, 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 ฿27,796 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as ฿30,475.

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 ฿18,886.

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.

฿16,271+ Flights from Bangkok to Ontario

Cheap flight deals from Bangkok to Ontario

Round-trip from	฿26,440
One-way from	฿16,271
Popular in	July
Cheapest in	December
Average price	฿32,089

STARLUX Airlines
14/11-14/11
2 total stops
40h 55m total
Bangkok to Ontario

Search Deals

STARLUX Airlines
22/6
1 total stop
37h 15m total
Bangkok to Ontario

Search Deals

Highest demand for flights based on searches. 4% potential increase in price (฿51,124 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (฿15,831 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 15 June 2025.

Fri 14/1113:45BKK - ONT

1 stop17h 05mSTARLUX Airlines

Fri 14/1121:45ONT - BKK

1 stop23h 50mSTARLUX Airlines

Deal found 12/6฿26,440

Sun 14/910:50BKK - ONT

1 stop21h 50mChina Airlines

Mon 29/900:10ONT - BKK

1 stop19h 35mChina Airlines

Deal found 14/6฿27,344

Thu 3/707:00BKK - ONT

2 stops43h 14mUnited Airlines

Tue 8/706:10ONT - BKK

2 stops56h 25mUnited Airlines

Deal found 12/6฿28,990

Fri 26/913:10BKK - ONT

1 stop17h 55mMultiple Airlines

Mon 13/1000:10ONT - BKK

1 stop19h 35mMultiple Airlines

Deal found 15/6฿32,703

Wed 13/807:30DMK - ONT

2 stops25h 10mMultiple Airlines

Tue 26/800:45ONT - DMK

1 stop29h 25mMultiple Airlines

Deal found 15/6฿40,192

Thu 25/902:30BKK - ONT

2 stops35h 29mQatar Airways

Tue 14/1006:00ONT - BKK

2 stops34h 15mQatar Airways

Deal found 15/6฿40,257

Wed 2/709:50BKK - ONT

2 stops26h 55mเดลต้า

Fri 1/817:59ONT - BKK

2 stops37h 46mเดลต้า

Deal found 13/6฿44,680

Thu 10/708:05BKK - ONT

2 stops24h 48mAmerican Airlines

Fri 25/700:59ONT - BKK

2 stops32h 01mAmerican Airlines

Deal found 13/6฿46,681

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 15 June 2025.

Fri 14/1113:45BKK - ONT

1 stop17h 05mSTARLUX Airlines

Fri 14/1121:45ONT - BKK

1 stop23h 50mSTARLUX Airlines

Deal found 12/6฿26,440

Sun 14/910:50BKK - ONT

1 stop21h 50mChina Airlines

Mon 29/900:10ONT - BKK

1 stop19h 35mChina Airlines

Deal found 14/6฿27,344

Thu 3/707:00BKK - ONT

2 stops43h 14mUnited Airlines

Tue 8/706:10ONT - BKK

2 stops56h 25mUnited Airlines

Deal found 12/6฿28,990

Fri 26/913:10BKK - ONT

1 stop17h 55mMultiple Airlines

Mon 13/1000:10ONT - BKK

1 stop19h 35mMultiple Airlines

Deal found 15/6฿32,703

Thu 25/902:30BKK - ONT

2 stops35h 29mQatar Airways

Tue 14/1006:00ONT - BKK

2 stops34h 15mQatar Airways

Deal found 15/6฿40,257

Wed 2/709:50BKK - ONT

2 stops26h 55mเดลต้า

Fri 1/817:59ONT - BKK

2 stops37h 46mเดลต้า

Deal found 13/6฿44,680

Thu 10/708:05BKK - ONT

2 stops24h 48mAmerican Airlines

Fri 25/700:59ONT - BKK

2 stops32h 01mAmerican Airlines

Deal found 13/6฿46,681

Sat 28/602:35BKK - ONT

2 stops34h 11mKorean Air

Sun 13/706:25ONT - BKK

2 stops27h 00mKorean Air

Deal found 13/6฿53,461

Wed 13/807:30DMK - ONT

2 stops25h 10mMultiple Airlines

Tue 26/800:45ONT - DMK

1 stop29h 25mMultiple Airlines

Deal found 15/6฿40,192

Last-minute flights from Bangkok to Ontario
Discover last-minute flight deals from Bangkok to Ontario. Data last updated 15 June 2025 and is based on user searches.

Fri 20/602:55BKK - ONT

2 stops33h 04mเอทิฮัดแอร์เวย์

Sat 21/623:59ONT - BKK

2 stops41h 11mเอทิฮัดแอร์เวย์

Deal found 14/6฿88,197

Fri 20/607:00BKK - ONT

2 stops24h 38mUnited Airlines

Tue 1/706:10ONT - BKK

2 stops27h 45mUnited Airlines

Deal found 13/6฿119,092

Sat 21/613:10BKK - ONT

1 stop17h 55mSTARLUX Airlines

Sat 21/623:10ONT - BKK

1 stop27h 30mSTARLUX Airlines

Deal found 14/6฿30,281

Sat 21/617:30BKK - ONT

1 stop38h 30mChina Airlines

Sat 27/900:10ONT - BKK

1 stop26h 10mChina Airlines

Deal found 14/6฿130,068

Sun 22/608:40BKK - ONT

2 stops53h 33mQatar Airways

Mon 6/1015:00ONT - BKK

2 stops32h 25mQatar Airways

Deal found 14/6฿240,282

Sat 28/602:40BKK - ONT

1 stop29h 20mChina Airlines

Sat 12/700:45ONT - BKK

1 stop21h 25mChina Airlines

Deal found 13/6฿29,797

Sat 28/602:35BKK - ONT

2 stops34h 11mKorean Air

Sun 13/706:25ONT - BKK

2 stops27h 00mKorean Air

Deal found 13/6฿53,461

Wed 2/709:50BKK - ONT

2 stops26h 55mเดลต้า

Sun 27/713:15ONT - BKK

2 stops45h 50mเดลต้า

Deal found 13/6฿44,680

Thu 3/707:00BKK - ONT

2 stops43h 14mUnited Airlines

Tue 8/706:10ONT - BKK

2 stops56h 25mUnited Airlines

Deal found 12/6฿28,990

Thu 3/702:55BKK - ONT

2 stops57h 04mเอทิฮัดแอร์เวย์

Mon 7/723:59ONT - BKK

2 stops33h 56mเอทิฮัดแอร์เวย์

Deal found 13/6฿83,645

Thu 10/708:05BKK - ONT

2 stops24h 48mAmerican Airlines

Fri 25/700:59ONT - BKK

2 stops32h 01mAmerican Airlines

Deal found 13/6฿46,681

Mon 14/713:10BKK - ONT

1 stop18h 30mSTARLUX Airlines

Mon 22/923:10ONT - BKK

1 stop27h 30mSTARLUX Airlines

Deal found 12/6฿29,184

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 15 June 2025.

Sun 22/617:50BKK - ONT

1 stop37h 15mSTARLUX Airlines

Deal found 14/6฿16,271

Tue 2/902:40BKK - ONT

1 stop30h 00mChina Airlines

Deal found 13/6฿16,561

Sun 21/902:40DMK - ONT

2 stops35h 00mMultiple Airlines

Deal found 13/6฿17,304

Fri 19/922:50BKK - ONT

2 stops32h 15mMultiple Airlines

Deal found 13/6฿17,723

Sat 20/909:35BKK - ONT

2 stops46h 02mUnited Airlines

Deal found 13/6฿18,111

Mon 22/902:30BKK - ONT

2 stops29h 58mQatar Airways

Deal found 13/6฿22,760

Tue 24/609:45BKK - ONT

2 stops46h 19mJapan Airlines

Deal found 14/6฿29,248

Thu 30/1023:15BKK - ONT

2 stops37h 27mเดลต้า

Deal found 13/6฿32,800

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

Fri 14/11

13:45-15:50

1 stop17h 05m

Ontario

Fri 14/11

21:45-12:35

1 stop23h 50m

฿26,440

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sun 14/9

10:50-18:40

1 stop21h 50m

Ontario

Mon 29/9

00:10-09:45

1 stop19h 35m

฿27,344

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Thu 3/7

07:00-12:14

2 stops43h 14m

Ontario

Tue 8/7

06:10-04:35

2 stops56h 25m

฿28,990

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Fri 26/9

13:10-17:05

1 stop17h 55m

Ontario

Mon 13/10

00:10-09:45

1 stop19h 35m

฿32,703

BangkokOntario

DMK - ONT

DMKONT

Bangkok Don Mueang Intl

Wed 13/8

07:30-18:40

2 stops25h 10m

Ontario

Tue 26/8

00:45-20:10

1 stop29h 25m

฿40,192

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Thu 25/9

02:30-23:59

2 stops35h 29m

Ontario

Tue 14/10

06:00-06:15

2 stops34h 15m

฿40,257

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 2/7

09:50-22:45

2 stops26h 55m

Ontario

Fri 1/8

17:59-21:45

2 stops37h 46m

฿44,680

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Thu 10/7

08:05-18:53

2 stops24h 48m

Ontario

Fri 25/7

00:59-23:00

2 stops32h 01m

฿46,681

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sat 28/6

02:35-22:46

2 stops34h 11m

Ontario

Sun 13/7

06:25-23:25

2 stops27h 00m

฿53,461

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sun 22/6

17:50-17:05

1 stop37h 15m

฿16,271

Flights are sorted by cheapest return flights first.

Deals found on 14/6

Showing 1-10 of 17 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 Japan 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

1,091 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.

Japan Airlines

8.3

Very Good

1,494 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

740 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

7,961 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 ฿26,440. Other airlines that can offer you cheap pricing are China Airlines, from ฿27,344, and United Airlines, from ฿28,990. You may be able to fly from Bangkok to Ontario for 17% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Bangkok to Ontario one-way?
฿16,271 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 ฿16,561 and ฿18,111, 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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Krabi to Burbank flights

Top airline flying from Bangkok to Ontario

Airline	Cheapest	Average	Flexibility	On-time
China Airlines	Cheapest฿26,888	Average฿29,887	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 ฿16,271

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 22/6. 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 15 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 15 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 Japan 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 15 June 2025.