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฿1,679+ 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 30/7. 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
20 Jun — 27 Jun1
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 15 June 2025.

Cheapest airline

China Airlines

Good round-trip deal

฿5,343 or less
On average, China Airlines currently has the cheapest one-way flight from Ontario (avg. price of ฿27,974).
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Price to beat on a round-trip 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 15 June 2025.

Mon 11/822:00ONT - MYR
1 stop9h 11mเดลต้า
Wed 20/806:00MYR - ONT
1 stop7h 35mเดลต้า
Deal found 13/6฿10,879
Tue 8/721:20ONT - MYR
1 stop10h 10mเซาท์เวสต์แอร์ไลน์
Sat 12/718:40MYR - ONT
1 stop7h 35mเซาท์เวสต์แอร์ไลน์
Deal found 14/6฿12,558
Mon 7/718:39ONT - MYR
2 stops12h 18mUnited Airlines
Wed 23/716:50MYR - ONT
1 stop8h 16mUnited Airlines
Deal found 14/6฿14,301
Thu 7/806:25ONT - BKK
2 stops25h 20mKorean Air
Tue 19/802:35BKK - ONT
2 stops28h 36mKorean Air
Deal found 14/6฿24,696
Mon 27/1006:00ONT - BKK
2 stops25h 30mเดลต้า
Tue 11/1109:40BKK - ONT
2 stops22h 37mเดลต้า
Deal found 13/6฿25,794
Mon 3/1121:45ONT - BKK
1 stop23h 50mSTARLUX Airlines
Mon 17/1113:45BKK - ONT
1 stop17h 05mSTARLUX Airlines
Deal found 14/6฿26,052
Sun 5/1000:10ONT - BKK
1 stop19h 35mChina Airlines
Wed 15/1002:40BKK - ONT
1 stop29h 20mChina Airlines
Deal found 13/6฿26,633
Wed 3/906:00ONT - BKK
2 stops27h 55mUnited Airlines
Wed 17/909:35BKK - ONT
2 stops24h 58mUnited Airlines
Deal found 14/6฿26,666
Wed 12/1106:43ONT - CNX
2 stops25h 22mKorean Air
Tue 10/200:15CNX - ONT
2 stops30h 05mKorean Air
Deal found 14/6฿26,827
Sat 16/806:00ONT - BKK
2 stops27h 25mMultiple Airlines
Sun 28/902:35BKK - ONT
2 stops28h 42mMultiple Airlines
Deal found 14/6฿29,184
Thu 23/1006:45ONT - HKT
2 stops47h 05mKorean Air
Tue 4/1123:20HKT - ONT
2 stops32h 57mKorean Air
Deal found 15/6฿29,216
Sat 20/923:10ONT - DMK
2 stops28h 25mMultiple Airlines
Sun 5/1011:10DMK - ONT
2 stops43h 55mMultiple Airlines
Deal found 14/6฿30,637

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 15 June 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

Mon 11/8

22:00-10:11

1 stop9h 11m

Myrtle Beach Intl

Tue 19/8

06:00-10:35

1 stop7h 35m

฿10,879

OntarioMyrtle Beach

ONT - MYR

ONTMYR

Ontario

Tue 8/7

21:20-10:30

1 stop10h 10m

Myrtle Beach Intl

Sat 12/7

18:40-23:15

1 stop7h 35m

฿12,558

OntarioMyrtle Beach

ONT - MYR

ONTMYR

Ontario

Mon 7/7

18:39-09:57

2 stops12h 18m

Myrtle Beach Intl

Wed 23/7

16:50-22:06

1 stop8h 16m

฿14,301

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 7/8

06:25-21:45

2 stops25h 20m

Bangkok Suvarnabhumi

Tue 19/8

02:35-17:11

2 stops28h 36m

฿24,696

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 27/10

06:00-21:30

2 stops25h 30m

Bangkok Suvarnabhumi

Tue 11/11

09:40-17:17

2 stops22h 37m

฿25,794

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 3/11

21:45-12:35

1 stop23h 50m

Bangkok Suvarnabhumi

Mon 17/11

13:45-15:50

1 stop17h 05m

฿26,052

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 5/10

00:10-09:45

1 stop19h 35m

Bangkok Suvarnabhumi

Wed 15/10

02:40-18:00

1 stop29h 20m

฿26,633

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 3/9

06:00-23:55

2 stops27h 55m

Bangkok Suvarnabhumi

Wed 17/9

09:35-20:33

2 stops24h 58m

฿26,666

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 12/11

06:43-23:05

2 stops25h 22m

Chiang Mai

Tue 10/2

00:15-15:20

2 stops30h 05m

฿26,827

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 16/8

06:00-23:25

2 stops27h 25m

Bangkok Suvarnabhumi

Sun 28/9

02:35-17:17

2 stops28h 42m

฿29,184

Flights are sorted by cheapest return flights first.

Deals found on 13/6

Showing 1-10 of 43 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 9 June 2025.

Booking 77 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, August is the cheapest month in which you can book a flight from Ontario (average of ฿20,629). Flying from Ontario in June will prove the most costly (average of ฿27,699). 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 (162 flights per day), Dallas (139 flights per day) and Salt Lake City (86 flights per day).

Las Vegas Harry Reid Intl
Las Vegas Harry Reid Intl
From ฿166

What is the cheapest place to fly to from Ontario?

The cheapest city to fly to from Ontario is Las Vegas Harry Reid Intl, with prices starting at ฿5,343. Explore other affordable destinations below.

Las Vegas Harry Reid Intl
Las Vegas Harry Reid Intl
From ฿166

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

Entertainment

8.9

Comfort

9.0

Crew

9.3

Food

8.8

Overall

9.1

Boarding

9.0

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

Entertainment

8.9

Comfort

9.0

Crew

9.3

Food

8.8

Overall

9.1

Boarding

9.0

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

Entertainment

8.9

Comfort

9.0

Crew

9.3

Food

8.8

Overall

9.1

Boarding

9.0

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
738 reviews
STARLUX Airlines
9.1
Wonderful
Check prices

Entertainment

8.9

Comfort

9.0

Crew

9.3

Food

8.8

Overall

9.1

Boarding

9.0

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
7,958 reviews
STARLUX Airlines
9.1
Wonderful
Check prices

Entertainment

8.9

Comfort

9.0

Crew

9.3

Food

8.8

Overall

9.1

Boarding

9.0

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.
United Airlines
7.4
Good
8,793 reviews
STARLUX Airlines
9.1
Wonderful
Check prices

Entertainment

8.9

Comfort

9.0

Crew

9.3

Food

8.8

Overall

9.1

Boarding

9.0

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.

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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 15 June 2025.

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

    The most selected flight destinations from Ontario for the current month are Denver, Dallas/Fort Worth Airport, 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 ฿5,343 to Las Vegas (prices may vary depending on the airline and departure time). On average, users have booked flights for ฿5,650 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 ฿64,766

  • What is the cheapest month to fly from Ontario?

    At the present moment the cheapest month to fly from Ontario is currently August; 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 ฿25,407

  • 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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