$515 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 5/21. 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.
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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 Flight Deals 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

Thu, May 22 - Sat, Oct 4
China Airlines Logo
1:20 pm - 6:00 pmBKK-ONT
18h 40m1 stop
China Airlines Logo
12:10 am - 4:20 pmONT-BKK
26h 10m1 stop
$842China Airlines
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Thu, May 22 - Sat, Oct 4
China Airlines Logo
10:50 am - 6:00 pmBKK-ONT
21h 10m1 stop
China Airlines Logo
12:10 am - 4:20 pmONT-BKK
26h 10m1 stop
$845China Airlines
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Thu, May 22 - Sat, Oct 4
China Airlines Logo
10:50 am - 6:00 pmBKK-ONT
21h 10m1 stop
China Airlines Logo
12:10 am - 4:20 pmONT-BKK
26h 10m1 stop
$852China Airlines
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Tue, Jun 17 - Tue, Jul 22
United Airlines Logo
9:35 am - 10:45 pmBKK-ONT
27h 10m2 stops
United Airlines Logo
6:39 pm - 4:35 amONT-BKK
43h 56m2 stops
$898United Airlines
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Wed, Jun 4 - Wed, Oct 15
United Airlines Logo
9:35 am - 5:39 pmBKK-ONT
46h 04m2 stops
United Airlines Logo
1:35 pm - 4:35 amONT-BKK
49h 00m2 stops
$900United Airlines
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Thu, Jun 12 - Fri, Jun 27
STARLUX Airlines Logo
5:50 pm - 5:05 pmBKK-ONT
37h 15m1 stop
STARLUX Airlines Logo
11:10 pm - 12:00 pmONT-BKK
22h 50m1 stop
$957STARLUX Airlines
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Wed, Jun 4 - Wed, Oct 15
STARLUX Airlines Logo
1:10 pm - 5:05 pmBKK-ONT
17h 55m1 stop
STARLUX Airlines Logo
11:10 pm - 4:40 pmONT-BKK
27h 30m1 stop
$974STARLUX Airlines
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Thu, Sep 11 - Thu, Sep 25
Logo
5:50 pm - 5:05 pmBKK-ONT
37h 15m1 stop
Logo
7:00 am - 9:45 pmONT-BKK
24h 45m2 stops
$1,024
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Sun, Sep 21 - Mon, Sep 29
Logo
2:40 am - 6:00 pmBKK-ONT
29h 20m1 stop
Logo
11:10 pm - 12:00 pmONT-BKK
22h 50m1 stop
$1,082
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Sun, Jul 20 - Sat, Jul 26
Korean Air Logo
2:35 am - 5:06 pmBKK-ONT
28h 31m2 stops
Korean Air Logo
6:30 am - 9:45 pmONT-BKK
25h 15m2 stops
$1,922Korean Air
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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 February, where tickets cost $872 on average for return flights. On the other hand, the most expensive months are November and July, where the average cost of tickets from Thailand is $1,114 and $1,093 respectively. For one-way flights, the best month to travel is February with an average price of $872.

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Good to know

Low seasonMay
High seasonJuly
Cheapest flight$515
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 12% 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 772 direct flights from within Thailand to Ontario. The most common day for departures is Friday, with 18% 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.

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 732 reviews
7.8Food
8.0Comfort
8.3Boarding
8.5Crew
8.0Entertainment
Airline reviews

Staff was so nice and very helpful with directions aswell!

10.0 ExcellentAnonymous, Apr 2025MNL - TPE
Read more China Airlines reviews

Staff was so nice and very helpful with directions aswell!

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

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

staff are super nice and effiecient! It was a very comfortable and relaxing flight

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.

The food was the only thing that could have made the experience even better. Everything was stellar but the food. The staff was superb. I’ve been flying with ANA for years as my go-to and I think I may have found my new favorite. 😍

Short lay over. Seat assignment was terrible. Was traveling as a family and end up being seated separately. Will not use underpricer ever again.

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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