$455 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 11/12. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight 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, Sep 2 - Mon, Oct 6
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
$749STARLUX Airlines
Find Deal
Mon, Oct 20 - Fri, Oct 31
STARLUX Airlines Logo
1:10 pm - 5:05 pmBKK-ONT
17h 55m1 stop
STARLUX Airlines Logo
10:45 pm - 4:30 pmONT-BKK
27h 45m1 stop
$758STARLUX Airlines
Find Deal
Sat, Sep 13 - Sat, Sep 20
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
$773STARLUX Airlines
Find Deal
Sat, Dec 20 - Fri, Jan 9
STARLUX Airlines Logo
1:45 pm - 4:30 pmBKK-ONT
17h 45m1 stop
STARLUX Airlines Logo
9:45 pm - 12:35 pmONT-BKK
23h 50m1 stop
$793STARLUX Airlines
Find Deal
Tue, Sep 2 - Tue, Sep 9
China Airlines Logo
1:20 pm - 6:40 pmBKK-ONT
19h 20m1 stop
China Airlines Logo
12:45 am - 9:45 amONT-BKK
19h 00m1 stop
$833China Airlines
Find Deal
Mon, Sep 1 - Sun, Oct 5
China Airlines Logo
2:40 am - 6:40 pmBKK-ONT
30h 00m1 stop
China Airlines Logo
12:10 am - 9:45 amONT-BKK
19h 35m1 stop
$850China Airlines
Find Deal
Sun, Sep 28 - Sun, Oct 5
Logo
5:50 pm - 5:05 pmBKK-ONT
37h 15m1 stop
Logo
7:47 pm - 4:40 pmONT-BKK
30h 53m2 stops
$874
Find Deal
Tue, Sep 2 - Wed, Sep 10
United Airlines Logo
9:35 am - 5:37 pmBKK-ONT
46h 02m2 stops
United Airlines Logo
6:50 pm - 11:55 pmONT-BKK
39h 05m2 stops
$899United Airlines
Find Deal
Wed, Oct 29 - Tue, Nov 11
United Airlines Logo
9:25 am - 12:37 pmBKK-ONT
41h 12m2 stops
United Airlines Logo
6:00 am - 12:05 amONT-BKK
27h 05m2 stops
$902United Airlines
Find Deal
Tue, Sep 2 - Mon, Sep 8
Logo
5:50 pm - 5:05 pmBKK-ONT
37h 15m1 stop
Logo
6:00 am - 9:45 pmONT-BKK
25h 45m2 stops
$913
Find Deal
Booking Insights

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 August, where tickets cost $799 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 $1,057 and $1,052 respectively. For one-way flights, the best month to travel is August with an average price of $799.

Find deals

Good to know

Low seasonNovember
Cheapest flight$455
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly with an average 10% 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 565 direct flights from within Thailand to Ontario. The most common day for departures is Sunday, with 16% 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 762 reviews
8.3Boarding
8.5Crew
7.8Food
8.0Comfort
8.0Entertainment
Airline reviews

I love my Delta crew, they were so welcoming and helpful.

10.0 ExcellentAshley, Jul 2025LAX - DFW
Read more China Airlines reviews

I love my Delta crew, they were so welcoming and helpful.

I absolutely loved my flight from Taipei to LAX. I was originally assigned to a different seat, however one of the stewardess noticed I was uncomfortable in my seat. She offered to move me to a more comfortable setting. Although she didn’t have to do what she did, I am more than grateful and thankful for her doing so. My longer flight felt much more comfortable, just by her taking notice. I really appreciate her.

Overall was a lovely experience. The crew were kind and courteous throughout the entire flight.

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.

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.

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…

I would like to commend the staff from this flight. They all looked happy and I can tell they love what they are doing and constantly smiling while serving the passengers. Special mention to the guy FA in our section. I did not get his name but he is so far the best F.A I have ever encountered!

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

Ontario (ONT)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.