$496 Find Cheap Flights from Thailand to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Ontario departing on 11/27. 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.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Ontario, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Thailand to Ontario

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Thailand to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Thailand to Ontario

Tue, Oct 7 - Sun, Dec 7
China Airlines Logo
5:30 pm - 6:00 pmBKK-ONT
38h 30m1 stop
China Airlines Logo
10:45 pm - 4:45 pmONT-BKK
27h 00m1 stop
$815China Airlines
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Mon, Oct 6 - Sun, Dec 7
China Airlines Logo
2:40 am - 6:00 pmBKK-ONT
29h 20m1 stop
China Airlines Logo
10:45 pm - 1:35 amONT-BKK
35h 50m1 stop
$828China Airlines
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Fri, Nov 7 - Sat, Nov 8
China Airlines Logo
2:05 pm - 4:50 pmBKK-ONT
17h 45m1 stop
China Airlines Logo
10:45 pm - 9:50 amONT-BKK
20h 05m1 stop
$863China Airlines
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Sat, Sep 13 - Fri, Oct 31
China Airlines Logo
10:50 am - 6:40 pmBKK-ONT
21h 50m1 stop
China Airlines Logo
11:45 pm - 4:45 pmONT-BKK
27h 00m1 stop
$880China Airlines
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Tue, Oct 7 - Sun, Dec 7
United Airlines Logo
9:35 am - 5:40 pmBKK-ONT
46h 05m2 stops
United Airlines Logo
6:00 am - 5:10 amONT-BKK
32h 10m2 stops
$898United Airlines
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Fri, Aug 22 - Wed, Sep 24
United Airlines Logo
7:00 am - 12:13 pmBKK-ONT
43h 13m2 stops
United Airlines Logo
6:00 am - 4:35 amONT-BKK
56h 35m2 stops
$904United Airlines
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Tue, Oct 7 - Sun, Dec 7
Logo
5:50 pm - 5:05 pmBKK-ONT
37h 15m1 stop
Logo
6:55 pm - 12:35 pmONT-BKK
26h 40m2 stops
$944
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Thu, Aug 21 - Wed, Sep 3
STARLUX Airlines Logo
5:50 pm - 5:40 pmBKK-ONT
37h 50m1 stop
STARLUX Airlines Logo
11:10 pm - 4:40 pmONT-BKK
27h 30m1 stop
$958STARLUX Airlines
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Wed, Jul 23 - Wed, Aug 20
STARLUX Airlines Logo
1:10 pm - 5:40 pmBKK-ONT
18h 30m1 stop
STARLUX Airlines Logo
11:45 pm - 4:40 pmONT-BKK
26h 55m1 stop
$995STARLUX Airlines
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Mon, Oct 6 - Sun, Dec 7
Logo
2:40 am - 6:00 pmBKK-ONT
29h 20m1 stop
Logo
6:55 pm - 9:50 amONT-BKK
23h 55m2 stops
$1,026
Find Deal
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KAYAK's insights & trends for flights to Ontario

Get data-powered insights and trends for flights to Ontario to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights to Ontario is December, where tickets cost $866 on average for return flights. On the other hand, the most expensive months are July and November, where the average cost of tickets from Thailand is $1,154 and $1,114 respectively. For one-way flights, the best month to travel is December with an average price of $866.

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Good to know

Low seasonAugust
High seasonJuly
Cheapest flight$496
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly with an average 16% increase in price.
Flight from Bangkok to Ontario

FAQs - booking Ontario flights

  • How far is Ontario Airport from central Ontario?

    The city center of Ontario is 3 miles from Ontario Airport.

  • What is the name of Ontario’s airport?

    All flights to Ontario land at Ontario Airport. The airport code is ONT,and it can also be referred to as Ontario or Ontario Intl.

  • What is the cheapest day to fly to Ontario?

    Based on KAYAK data, the cheapest day to fly to Ontario is Thursday where round-trip tickets can be as cheap as $891. On the other hand, the most expensive day to fly is Friday, where round-trip prices are $1,014 on average.

  • How does KAYAK find such low prices on flights to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Ontario?

    The cheapest time of day to fly to Ontario is generally in the morning, when round-trip flights cost $883 on average. The most expensive time of day to fly to Ontario is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $953.

  • How many direct flights to Ontario are there each week?

    Each week there are around 570 direct flights from within Thailand to Ontario. The most common day for departures is Monday, with 15% of flights taking off on this day.

Top tips for finding cheap flights to Ontario

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Ontario flight deals.

Reviews of the top airline flying from Thailand to Ontario

 
See real verified KAYAK customer reviews for airlines flying to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Thailand to Ontario. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.3
China AirlinesOverall score based on 745 reviews
8.0Comfort
8.3Boarding
8.0Entertainment
8.5Crew
7.8Food
Airline reviews

Sat next to a woman who had her period. Blood was on her seat and on the arm rest between us. I ended up having period blood on my jacket and shoes. Very gross!

2.0 Mediocrelinzy, Jun 2025TPE - CGK
Read more China Airlines reviews

Sat next to a woman who had her period. Blood was on her seat and on the arm rest between us. I ended up having period blood on my jacket and shoes. Very gross!

They need to improve on how the plane lands cause it was not smooth at all.

Been flying with China Airline over years many times. Good experience with them, no issues.

Most relaxing long distance flight I have been on. And I have flown on many.

It was our first time flying with China Airlines and had a very nice experience. The airline staff & crews both on the ground and air were very nice. Food on the plane was very good. Will recommend it to family and friends.

Not great, will likely try to fly another or maybe I should have upgraded my ticket? Needed Air…

Boarding could have been a little bit better but other than that it was a pretty good experience. I think because of the stowaway to Paris France recently they are being extra diligent about boarding passes at the gate. But they boarded the back of the plane first, and that's something I really think needs to start in the USA.

I was ordered vegetarian food, but didn't services to me :(

Airline itself is great. While food was being taken off of my tray my beer spilled which was a total accident and I wasn’t upset about that, what was frustrating was I had to ask for towels to clean up and wipe my leg. It would have been left as is if I hadn’t.

Bars and restaurants in Taipei close early. The lounge isn’t very good, but better than the public areas.

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

Ontario (ONT)

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