฿3,742+ 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 29/1. 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
29 Jan — 5 Feb1
1 adult
1 adult, Economy, 0 bags

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 December 2025.

Cheapest round-trip flight

฿19,621

Cheapest airline

EVA Air

Good one-way deal

฿4,202 or less
The cheapest round-trip flight from Ontario is currently to Incheon Intl.
Search Deals
On average, EVA Air currently has the cheapest one-way flight from Ontario (avg. price of ฿26,705).
Search Deals
Price to beat on a one-way flight from Ontario.
Search Deals

Find flights from Ontario

Enter your travel dates to find the best prices.

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 December 2025.

Tue 27/122:30ONT - MYR
1 stop8h 16mเดลต้า
Tue 3/216:00MYR - ONT
1 stop8h 05mเดลต้า
Deal found 28/12฿12,106
Wed 27/512:00ONT - MYR
1 stop8h 38mเดลต้า
Sun 31/513:05MYR - ONT
1 stop8h 10mเดลต้า
Deal found 29/12฿15,439
Sat 17/122:30ONT - MYR
1 stop8h 16mเดลต้า
Mon 19/114:19MYR - ONT
1 stop9h 46mเดลต้า
Deal found 28/12฿15,817
Fri 20/305:40ONT - MYR
2 stops10h 50mเซาท์เวสต์แอร์ไลน์
Fri 27/315:35MYR - ONT
2 stops9h 50mเซาท์เวสต์แอร์ไลน์
Deal found 30/12฿16,288
Mon 23/323:59ONT - MYR
2 stops14h 06mUnited Airlines
Mon 30/315:15MYR - ONT
1 stop10h 11mUnited Airlines
Deal found 29/12฿17,357
Mon 12/122:30ONT - MYR
1 stop8h 16mเดลต้า
Fri 16/114:19MYR - ONT
1 stop9h 46mเดลต้า
Deal found 28/12฿17,829
Sat 23/518:30ONT - MYR
2 stops13h 10mUnited Airlines
Sat 30/515:20MYR - ONT
1 stop10h 06mUnited Airlines
Deal found 30/12฿18,489
Tue 13/122:30ONT - MYR
1 stop8h 16mเดลต้า
Mon 19/114:19MYR - ONT
1 stop9h 46mเดลต้า
Deal found 28/12฿19,904
Wed 6/507:30ONT - HKT
2 stops24h 40mเดลต้า
Tue 19/523:25HKT - ONT
2 stops31h 51mเดลต้า
Deal found 27/12฿22,326
Thu 7/507:00ONT - HKT
2 stops25h 10mเดลต้า
Thu 21/523:25HKT - ONT
2 stops31h 51mเดลต้า
Deal found 27/12฿22,483
Tue 5/517:05ONT - HKT
2 stops39h 05mเดลต้า
Mon 18/523:25HKT - ONT
2 stops38h 19mเดลต้า
Deal found 27/12฿22,514
Sun 1/306:09ONT - BKK
2 stops56h 01mUnited Airlines
Sun 3/509:35BKK - ONT
2 stops51h 17mUnited Airlines
Deal found 28/12฿22,640

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 December 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

Tue 27/1

22:30-09:46

1 stop8h 16m

Myrtle Beach Intl

Tue 3/2

16:00-21:05

1 stop8h 05m

฿12,106

OntarioMyrtle Beach

ONT - MYR

ONTMYR

Ontario

Wed 27/5

22:59-11:56

2 stops9h 57m

Myrtle Beach Intl

Sun 31/5

13:05-18:15

1 stop8h 10m

฿15,596

OntarioMyrtle Beach

ONT - MYR

ONTMYR

Ontario

Sat 17/1

22:30-09:46

1 stop8h 16m

Myrtle Beach Intl

Mon 19/1

14:19-21:05

1 stop9h 46m

฿15,817

OntarioMyrtle Beach

ONT - MYR

ONTMYR

Ontario

Fri 20/3

05:40-19:30

2 stops10h 50m

Myrtle Beach Intl

Fri 27/3

15:35-22:25

2 stops9h 50m

฿16,288

OntarioMyrtle Beach

ONT - MYR

ONTMYR

Ontario

Mon 23/3

23:59-17:05

2 stops14h 06m

Myrtle Beach Intl

Mon 30/3

15:15-22:26

1 stop10h 11m

฿17,357

OntarioMyrtle Beach

ONT - MYR

ONTMYR

Ontario

Mon 12/1

17:07-09:46

2 stops13h 39m

Myrtle Beach Intl

Fri 16/1

14:19-21:05

1 stop9h 46m

฿17,986

OntarioMyrtle Beach

ONT - MYR

ONTMYR

Ontario

Sat 23/5

18:30-10:40

2 stops13h 10m

Myrtle Beach Intl

Sat 30/5

15:20-22:26

1 stop10h 06m

฿18,489

OntarioMyrtle Beach

ONT - MYR

ONTMYR

Ontario

Tue 13/1

22:30-09:46

1 stop8h 16m

Myrtle Beach Intl

Mon 19/1

14:19-21:05

1 stop9h 46m

฿19,904

OntarioMyrtle Beach

ONT - MYR

ONTMYR

Ontario

Thu 15/1

12:41-23:43

1 stop8h 02m

Myrtle Beach Intl

Mon 19/1

14:19-21:05

1 stop9h 46m

฿19,904

OntarioMyrtle Beach

ONT - MYR

ONTMYR

Ontario

Wed 14/1

12:41-23:41

1 stop8h 00m

Myrtle Beach Intl

Mon 19/1

14:19-21:05

1 stop9h 46m

฿19,904

Flights are sorted by cheapest return flights first.

Deals found on 28/12

Showing 1-10 of 60 results
1
2
3
...
6

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 26 December 2025.

Booking 83 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, January is the cheapest month in which you can book a flight from Ontario (average of ฿17,232). Flying from Ontario in June will prove the most costly (average of ฿24,652). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

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.

Direct flights from California

Book a direct flight from one of these other cities located in California.
Direct flights from Los Angeles
Direct flights from San Francisco
Direct flights from San Diego
Direct flights from Fresno
Direct flights from San Jose

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 December 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, Guadalajara. While Dallas/Fort Worth Airport, Denver, 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 ฿4,202 to Phoenix Sky Harbor Intl Airport (prices may vary depending on the airline and departure time). On average, users have booked flights for ฿9,577 to fly from Ontario.

  • What is the cheapest month to fly from Ontario?

    At the present moment the cheapest month to fly from Ontario is currently January; 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 ฿19,338

  • 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!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book With Flexibility

Our users can plan ahead with confidence and find flights with no change fees.

Travel Smart

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.