$314 Find Cheap Flights from Ontario to Thailand

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Thailand departing on 1/24. 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, 0 bags

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Cheap Flights from Ontario to Thailand

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Bangkok
Bangkok2 stops$719
Phuket City
Phuket City2 stops$711
Chiang Mai
Chiang Mai2 stops$772
Krabi
Krabi2 stops$5,247
Bangkok
Bangkok2 stops$719
Phuket City
Phuket City2 stops$711
Chiang Mai
Chiang Mai2 stops$772
Krabi
Krabi2 stops$5,247

Book Cheap Ontario to Thailand Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Thailand 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 Ontario to Thailand

Mon, Mar 2 - Mon, Apr 6
Delta Logo
6:00 am - 10:10 pm
ONT
-
HKT
25h 10m
2 stops
Delta Logo
11:25 pm - 10:34 pm
HKT
-
ONT
37h 09m
2 stops
$711Delta
Tue, Mar 24 - Tue, Mar 31
Korean Air Logo
6:00 am - 10:10 pm
ONT
-
HKT
26h 10m
2 stops
Korean Air Logo
11:25 pm - 5:13 pm
HKT
-
ONT
31h 48m
2 stops
$716Korean Air
Tue, Mar 3 - Tue, Mar 10
United Airlines Logo
6:10 am - 5:10 am
ONT
-
BKK
32h 00m
2 stops
United Airlines Logo
7:10 am - 5:41 pm
BKK
-
ONT
24h 31m
2 stops
$719United Airlines
Thu, Mar 19 - Thu, Apr 23
United Airlines Logo
6:15 am - 11:25 am
ONT
-
BKK
39h 10m
2 stops
United Airlines Logo
9:35 am - 10:45 pm
BKK
-
ONT
27h 10m
2 stops
$724United Airlines
Sun, Feb 1 - Sat, Feb 7
United Airlines Logo
6:00 am - 5:10 am
ONT
-
BKK
32h 10m
2 stops
United Airlines Logo
9:10 am - 5:43 pm
BKK
-
ONT
47h 33m
2 stops
$725United Airlines
Sat, Apr 11 - Thu, May 21
United Airlines Logo
6:00 am - 11:55 pm
ONT
-
BKK
27h 55m
2 stops
United Airlines Logo
7:00 am - 5:47 pm
BKK
-
ONT
24h 47m
2 stops
$727United Airlines
Thu, Jan 29 - Mon, Feb 2
Multiple Airlines Logo
6:00 am - 10:10 pm
ONT
-
HKT
25h 10m
2 stops
Multiple Airlines Logo
11:40 pm - 1:56 pm
HKT
-
ONT
29h 16m
2 stops
$765Multiple Airlines
Sat, May 9 - Fri, May 22
China Airlines Logo
12:10 am - 10:20 am
ONT
-
CNX
20h 10m
1 stop
China Airlines Logo
11:20 am - 6:00 pm
CNX
-
ONT
20h 40m
1 stop
$818China Airlines
Sun, May 3 - Fri, May 22
China Airlines Logo
12:10 am - 10:20 am
ONT
-
CNX
20h 10m
1 stop
China Airlines Logo
11:20 am - 6:00 pm
CNX
-
ONT
20h 40m
1 stop
$823China Airlines
Mon, Mar 2 - Mon, Mar 9
Multiple Airlines Logo
9:45 pm - 7:00 pm
ONT
-
CNX
30h 15m
2 stops
Multiple Airlines Logo
10:10 am - 4:50 pm
CNX
-
ONT
20h 40m
2 stops
$826Multiple Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Thailand flights

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

What is the cheapest month to fly from Ontario to Thailand?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Thailand, 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 from Ontario to Thailand is January, when tickets cost $769 (return) on average. On the other hand, the most expensive months are December and June, when the average cost of round-trip tickets is $1,452 and $1,337 respectively.

How far in advance should I book a flight from Ontario to Thailand?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to Thailand, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Ontario to Thailand, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Good to know

Low seasonAugust
Cheapest flight$314
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly and prices are also 17% lower on average.
Flight from Ontario to Bangkok Suvarnabhumi Airport

FAQs - booking Thailand flights

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

    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 from Ontario to Thailand.

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

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

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

    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 from Ontario to Thailand 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 from Ontario to Thailand?

    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 from Ontario to Thailand up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Ontario to Thailand

 
Need help choosing which airline to fly with from Ontario to Thailand? 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.
8.9
STARLUX AirlinesOverall score based on 267 reviews
9.1Crew
8.8Comfort
8.9Boarding
8.8Entertainment
8.6Food
Airline reviews

Majority of the movie entertainment loaded in the aircraft were quite old.

10.0 ExcellentAnonymous, Jan 2026
TPE - ONT
Read more STARLUX Airlines reviews

Majority of the movie entertainment loaded in the aircraft were quite old.

Crew is very attentive. Another new airbus 350-900 plane. Very modern.

Passengers were confused and freaking out coz the flight information wasn’t showing on the board that was running with all the departing flights. B9 gate was still showing Cathay Pacific bound for HK 15:50 was on until 22:07. STARLUX staff cameater but didn’t let the passengers go in to pre departure area until 22:45 for the 23:30 boarding time

The aircraft is fairly new. The screen is big and it's great to enjoy movies on a long haul flight. However, the food quality , and drink and snack selections, have room for improvement.

Preboarding food selection is an excellent idea. On the other end I did know the choice. People in my area know the choice. It ends with I got my meal till most of them are half way to finish their meal.

Overall it’s good . However the food quality can be improved .

My luggage was forced open and broke the zipper. I received it in a huge STARLUX plastic bag. Unfortunately, I have a round trip ticket but might be my first and last with this airline

I went to the gate that showed on the flight board but they changed gates at the last minute and I missed my flight. I had to buy new ticket from EVA air to Manila and take 3 hour bus ride back to my home. Will never fly Starlux again!

Starlux was great service and awesome food and drinks👍🏼 will take starlux again for my next vacation👍🏼

Loved the boarding process. All airlines should board from the back to the front. Very efficient. Food was excellent, crew were great, seats were spacious and comfortable and the entertainment screen was the best I have seen.

The boarding process was efficient and quick. The seats were comfortable. The food was good. The service was excellent. We had a lovely flight from Seattle on Korean air

Flight crew was fantastic. The aircraft was meticulously cleaned at all times. The crew was continuously checking to see if the passengers were ok.

They were trying to get people to check luggage because the over head compartments were full but when we boarded there were lots of empty places that people could have put the luggage.

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

Friendly flight attendants and gate agents. Very clean plane and food was good!

I was unable to select decent seats, and so I was stuck in the middle seat because it was selected for me

There was a lot of partial tv shows but not enough to last the flight. The food was incredible! The crew were so helpful and patient. Lots more space than what I usually get on an international flight. Very comfortable!

Stingy on the drinks - 15 hour direct flight and could barely get attention for some water

Not many people, so you can lay down on two seats

They did an excellent job helping me with a wheelchair. I couldn’t have asked for any better help.

Flight attendants. Food, entertainment and most of all, be on time.

Very bad. They don’t allow group people to sit together by blocking most of seats and opening only single seat during online checking in. . By doing so, they can rip off customers at the check-in counter by collecting extra money if we want to sit together in the same row.

Delayed. Not a full flight and whole rows left open with the paid seating. Food was ok. My beef meal only had one cube of beef the rest carrot cubes. Entertainment on personal device but didn’t know about it until the flight was almost done.

We are glad to have used China Airlines for our trip. Continue the good service! Thank you!

The flight was uneventful and the crew was kind and professional. Really appreciate the option to order a vegan meal for the flight!

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.

Better organization of boarding procedures. Terrible leadership guiding people to gates.

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

I did not like how the plane landed. It was not smooth.

Everything you need to know for your flight from Ontario to Thailand

Information on your arrival and departure airports