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฿1,903+ Cheap flights from Ontario

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
ONT — BKK
5 May — 12 May1
1 adult

What to know about flights from Ontario

Discover essential information about flights departing from Ontario, including flight schedules, destinations, airlines operating at the Ontario airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 30 April 2025.

Cheapest round-trip flight

฿29,872

Cheapest airline

China Airlines

Good one-way deal

฿3,573 or less
The cheapest round-trip flight from Ontario is currently to Taipei City Taiwan Taoyuan Intl.
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On average, China Airlines currently has the cheapest one-way flight from Ontario (avg. price of ฿36,373).
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Price to beat on a one-way flight from Ontario.
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Find flights from Ontario

Cheapest flights from Ontario
Explore the most affordable flight options available from Ontario. Find the lowest fares based on data from user searches, with prices last updated on 30 April 2025.

Fri 30/512:18ONT - MYR
1 stop8h 41mเดลต้า
Thu 5/606:00MYR - ONT
1 stop8h 08mเดลต้า
Deal found 29/4฿12,786
Thu 5/608:50ONT - MYR
1 stop11h 35mเซาท์เวสต์แอร์ไลน์
Sun 8/617:20MYR - ONT
1 stop8h 10mเซาท์เวสต์แอร์ไลน์
Deal found 28/4฿14,756
Sat 7/605:10ONT - MYR
2 stops30h 25mUnited Airlines
Wed 11/616:55MYR - ONT
1 stop8h 31mUnited Airlines
Deal found 29/4฿16,325
Tue 21/1006:00ONT - BKK
2 stops25h 45mเดลต้า
Thu 30/1009:40BKK - ONT
2 stops27h 02mเดลต้า
Deal found 29/4฿25,940
Tue 13/506:00ONT - BKK
2 stops27h 40mKorean Air
Tue 20/521:40BKK - ONT
2 stops34h 40mKorean Air
Deal found 30/4฿26,107
Thu 28/806:00ONT - BKK
2 stops32h 35mUnited Airlines
Sun 7/909:35BKK - ONT
2 stops48h 58mUnited Airlines
Deal found 29/4฿26,741
Wed 20/823:45ONT - BKK
1 stop26h 55mSTARLUX Airlines
Tue 2/917:50BKK - ONT
1 stop37h 15mSTARLUX Airlines
Deal found 30/4฿27,342
Sun 14/900:45ONT - BKK
1 stop19h 00mChina Airlines
Tue 7/1002:40BKK - ONT
1 stop29h 20mChina Airlines
Deal found 29/4฿29,212
Thu 11/907:00ONT - HKT
2 stops25h 10mKorean Air
Sat 20/923:25HKT - ONT
2 stops37h 17mKorean Air
Deal found 28/4฿31,048
Sun 21/900:10ONT - CNX
1 stop20h 10mChina Airlines
Fri 26/911:20CNX - ONT
1 stop20h 40mChina Airlines
Deal found 29/4฿31,348
Wed 1/1006:00ONT - BKK
2 stops34h 55mQatar Airways
Mon 15/1218:55BKK - ONT
2 stops38h 22mQatar Airways
Deal found 29/4฿32,216
Thu 28/807:00ONT - BKK
2 stops26h 25mMultiple Airlines
Sun 7/917:50BKK - ONT
1 stop37h 15mMultiple Airlines
Deal found 29/4฿33,351

Find flights from Ontario within your budget

Find flights departing from Ontario that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 30 April 2025. In the last 7 days, Cheapflights users made a total of 17,341 searches

Fly to

Suvarnabhumi

Route

Depart

Return

Price

OntarioMyrtle Beach

ONT - MYR

ONTMYR

Ontario

Fri 30/5

12:18-23:59

1 stop8h 41m

Myrtle Beach Intl

Thu 5/6

06:00-11:08

1 stop8h 08m

฿12,786

OntarioMyrtle Beach

ONT - MYR

ONTMYR

Ontario

Thu 5/6

08:50-23:25

1 stop11h 35m

Myrtle Beach Intl

Sun 8/6

17:20-22:30

1 stop8h 10m

฿14,756

OntarioMyrtle Beach

ONT - MYR

ONTMYR

Ontario

Sat 7/6

05:10-14:35

2 stops30h 25m

Myrtle Beach Intl

Wed 11/6

16:55-22:26

1 stop8h 31m

฿16,325

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 21/10

06:00-21:45

2 stops25h 45m

Bangkok Suvarnabhumi

Thu 30/10

09:40-22:42

2 stops27h 02m

฿25,940

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 13/5

06:00-23:40

2 stops27h 40m

Bangkok Suvarnabhumi

Tue 20/5

21:40-18:20

2 stops34h 40m

฿26,107

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 28/8

06:00-04:35

2 stops32h 35m

Bangkok Suvarnabhumi

Sun 7/9

09:35-20:33

2 stops48h 58m

฿26,741

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 20/8

23:45-16:40

1 stop26h 55m

Bangkok Suvarnabhumi

Tue 2/9

17:50-17:05

1 stop37h 15m

฿27,342

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 14/9

00:45-09:45

1 stop19h 00m

Bangkok Suvarnabhumi

Tue 7/10

02:40-18:00

1 stop29h 20m

฿29,212

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

Thu 11/9

07:00-22:10

2 stops25h 10m

Phuket City

Sat 20/9

23:25-22:42

2 stops37h 17m

฿31,048

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Sun 21/9

00:10-10:20

1 stop20h 10m

Chiang Mai

Fri 26/9

11:20-18:00

1 stop20h 40m

฿31,348

Flights are sorted by cheapest return flights first.

Deals found on 29/4

Showing 1-10 of 48 results
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Best time to book a flight from Ontario

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

Travel insights for flights from Ontario

Get recent, data-driven insights about flights from Ontario including ideal travel times, pricing trends, and more.

When is the best time to book a flight from Ontario?

Use this chart to determine the optimal time to book a return flight from Ontario to Suvarnabhumi. Price data was last updated on 25 April 2025.

Booking 63 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, February is the cheapest month in which you can book a flight from Ontario (average of ฿21,700). Flying from Ontario in June will prove the most costly (average of ฿35,221). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

Which airlines fly from Ontario?

Only one airline operates round-trip flights from Ontario: China Airlines. This airline flies to the following popular destinations: Bangkok.

China Airlines

China Airlines

From ฿853

What are popular destinations to fly to from Ontario?

If you’re flying from Ontario, these routes are more frequently taken by airlines Seattle (124 flights per day), Dallas (97 flights per day) and Atlanta (73 flights per day).

Seattle/Tacoma Intl

Seattle/Tacoma Intl

From ฿502

Denver Intl

Denver Intl

From ฿107

Dallas/Fort Worth

Dallas/Fort Worth

From ฿305

What is the cheapest place to fly to from Ontario?

The cheapest city to fly to from Ontario is Denver Intl, with prices starting at ฿3,573. Explore other affordable destinations below.

Denver Intl

Denver Intl

From ฿107

Dallas/Fort Worth

Dallas/Fort Worth

From ฿305

Seattle/Tacoma Intl

Seattle/Tacoma Intl

From ฿502

Airline reviews for flights from Ontario

Get insights into the airlines that provide service from Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing airline for your flight from Ontario. In the last 7 days, Cheapflights users made a total of 17,341 searches.
STARLUX Airlines
9.1
Wonderful
Check prices

Boarding

9.0

Food

8.9

Overall

9.1

Entertainment

9.0

Crew

9.3

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
STARLUX Airlines
9.1
Wonderful
STARLUX Airlines
9.1
Wonderful
Check prices

Boarding

9.0

Food

8.9

Overall

9.1

Entertainment

9.0

Crew

9.3

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
EVA Air
8.4
Very Good
1,186 reviews
STARLUX Airlines
9.1
Wonderful
Check prices

Boarding

9.0

Food

8.9

Overall

9.1

Entertainment

9.0

Crew

9.3

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
Korean Air
8.4
Very Good
1,068 reviews
STARLUX Airlines
9.1
Wonderful
Check prices

Boarding

9.0

Food

8.9

Overall

9.1

Entertainment

9.0

Crew

9.3

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
China Airlines
8.3
Very Good
732 reviews
STARLUX Airlines
9.1
Wonderful
Check prices

Boarding

9.0

Food

8.9

Overall

9.1

Entertainment

9.0

Crew

9.3

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
เดลต้า
8.0
Very Good
7,934 reviews
STARLUX Airlines
9.1
Wonderful
Check prices

Boarding

9.0

Food

8.9

Overall

9.1

Entertainment

9.0

Crew

9.3

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.

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Related info for your journey

Access useful and relevant information related to your journey from Ontario. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 30 April 2025.

  • What are the most popular destinations to fly to from Ontario?

    The most selected flight destinations from Ontario for the current month are Dallas/Fort Worth Airport, Denver, Honolulu. While Denver, Dallas/Fort Worth Airport, Guadalajara are the top choices made by travellers year-round.

  • What is the cheapest flight from Ontario to anywhere?

    Users have flown out of Ontario for as low as ฿3,573 to Denver (prices may vary depending on the airline and departure time). On average, users have booked flights for ฿10,788 to fly from Ontario.

  • What is the cheapest premium economy flight from Ontario?

    If you're looking for an elevated level of comfort for your next adventure, premium economy flights from Ontario may suit your needs. The cheapest premium economy flights from Ontario are:
    Fly Ontario to Taipei City Taiwan Taoyuan Intl Airport from ฿66,976

  • What is the cheapest month to fly from Ontario?

    At the present moment the cheapest month to fly from Ontario is currently February; with June being the most expensive. Prices will vary depending on multiple factors such as booking in advance, airline and departure airports and times.

  • Where are the cheapest places to fly to from Ontario?

    Here are some of the cheapest flight destinations from Ontario:
    Fly from Ontario to Bangkok from ฿25,439

  • How does Cheapflights help users find flights from Ontario?

    Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from 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 Ontario?

    Cheapflights simply makes it quick and affordable to book flights from Ontario by bringing together all flight options from hundreds of airlines and agencies online — and we put them in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

  • Can Cheapflights find flights from Ontario with no change fees?

    Cheapflights does show flights with no change fees to all users. To see these options for flights from Ontario, users can toggle the no change fees filter when performing a flight search.

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

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

See more FAQs

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 Ontario?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from 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 Ontario?

Cheapflights simply makes it quick and affordable to book flights from Ontario by bringing together all flight options from hundreds of airlines and agencies online — and we put them in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Ontario with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Ontario, users can toggle the no change fees filter when performing a flight search.

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

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

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