$411 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 4/30. 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$827
Phuket City
Phuket City2 stops$990
Chiang Mai
Chiang Mai1 stop$968
Krabi
Krabi2 stops$1,090
Bangkok
Bangkok2 stops$827
Phuket City
Phuket City2 stops$990
Chiang Mai
Chiang Mai1 stop$968
Krabi
Krabi2 stops$1,090

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

Sun, Aug 30 - Sun, Sep 20
Multiple Airlines Logo
3:02 pm - 8:55 am
ONT
-
BKK
27h 53m
2 stops
Multiple Airlines Logo
5:50 pm - 5:05 pm
BKK
-
ONT
37h 15m
1 stop
$827Multiple Airlines
Mon, Apr 27 - Tue, May 12
Korean Air Logo
7:00 am - 11:35 pm
ONT
-
BKK
26h 35m
2 stops
Korean Air Logo
9:50 am - 5:10 pm
BKK
-
ONT
45h 20m
2 stops
$838Korean Air
Mon, Apr 27 - Tue, May 12
Korean Air Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Korean Air Logo
9:50 am - 5:10 pm
BKK
-
ONT
45h 20m
2 stops
$841Korean Air
Sat, May 2 - Sun, May 17
China Airlines Logo
12:10 am - 1:25 am
ONT
-
BKK
35h 15m
1 stop
China Airlines Logo
10:50 am - 6:00 pm
BKK
-
ONT
21h 10m
1 stop
$850China Airlines
Tue, Sep 15 - Sat, Oct 10
China Airlines Logo
12:10 am - 1:25 am
ONT
-
BKK
35h 15m
1 stop
China Airlines Logo
1:20 pm - 6:00 pm
BKK
-
ONT
18h 40m
1 stop
$853China Airlines
Sat, May 2 - Sun, May 17
China Airlines Logo
12:10 am - 1:25 am
ONT
-
BKK
35h 15m
1 stop
China Airlines Logo
5:30 pm - 6:00 pm
BKK
-
ONT
38h 30m
1 stop
$858China Airlines
Sun, May 3 - Mon, May 18
Multiple Airlines Logo
9:19 am - 8:55 am
ONT
-
BKK
33h 36m
2 stops
Multiple Airlines Logo
10:50 am - 6:00 pm
BKK
-
ONT
21h 10m
1 stop
$862Multiple Airlines
Sat, May 2 - Thu, May 14
Delta Logo
7:00 am - 10:10 pm
ONT
-
HKT
25h 10m
2 stops
Delta Logo
11:25 pm - 5:10 pm
HKT
-
ONT
31h 45m
2 stops
$990Delta
Tue, Jul 14 - Wed, Jul 22
Qatar Airways Logo
12:04 pm - 7:45 am
ONT
-
HKT
29h 41m
2 stops
Qatar Airways Logo
8:30 pm - 11:11 pm
HKT
-
ONT
40h 41m
2 stops
$1,230Qatar Airways
Wed, Apr 29 - Sun, May 3
Qatar Airways Logo
6:00 am - 2:05 pm
ONT
-
HKT
42h 05m
2 stops
Qatar Airways Logo
8:45 pm - 7:05 pm
HKT
-
ONT
36h 20m
2 stops
$1,270Qatar Airways
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 $764 (return) on average. On the other hand, the most expensive months are December and June, when the average cost of round-trip tickets is $1,424 and $1,347 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 26 weeks before departure.

Good to know

Low seasonAugust
Cheapest flight$411
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly and prices are also 16% 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 4 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 297 reviews
8.9Comfort
9.0Boarding
8.8Entertainment
8.6Food
9.2Crew
Airline reviews

I liked everything but I flew business class and StarLux booked another passenger and a one year old , in business class The child cried 80 percent of the flight, the flight was a long 13 hour flight. I’m 75 and I have 10 grand children, I love kids But with that said it still made it not and enjoyable flight. Ask your great flight attendance what they think of the situation, they had to deal with. Let me know what they said Respectfully, Al Eaddy

2.0 MediocreAlbert, Apr 2026
TPE - SFO
Read more STARLUX Airlines reviews

I liked everything but I flew business class and StarLux booked another passenger and a one year old , in business class The child cried 80 percent of the flight, the flight was a long 13 hour flight. I’m 75 and I have 10 grand children, I love kids But with that said it still made it not and enjoyable flight. Ask your great flight attendance what they think of the situation, they had to deal with. Let me know what they said Respectfully, Al Eaddy

Everything is smooth. Very good. Except flight arrived SFO 30min late.

more new movies and the blockbuster movies that everyone likes

Great airline. Kind staff, before m, during, and after the flight. They Directed you the whole way. Even when I arrived at my transfer destination, flight attendants guided passengers on which direction to go. I would definitely fly STARLUX again.

Got dinner and breakfast! They had mahjong game in entertainment system. Current movies. Loved the slippers, sleeping mask packet. Great experience for a long flight

Leg room was great. Friendly crew. Food is great. Crew always kept the toilet clean.

Excellent. Airline was very clean, staff was excellent, very professional. Economy seats were still large and comfortable. Meals were included and with good options. We were given a blanket and pillow as well as a comfort kit including an eye mask, ear plugs, and tooth brush. Would highly recommend.

Business Class is exceptional, from the lie flat seats to the wide range of food on board. Can’t wait for our next journey with Starlux!

Th tray was dirty when pulled it out. Still oily and food stains can clearly see last trip cleaner did not clean well. The toilet sink water did not drain quickly enough.

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

Lousy entertainment system. Crews are excellent. Meal is just mediocre.

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

Everything was fine except the seats were quite compressed and hard for the 12 hour flight

The crew was very professional and friendly. Although there was a water leak from panel above, the crew was trying to mitigate the consequence. We are happy with its service and the value offered. We will definitely take China Airlines again.

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.

While they turned off most cabin lights to allow people to sleep, I was bothered by how bright the side lights still were. It was still quite bright for me in a window seat, when I wish I could have slept!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

N Everything was perfect from boarding to assistance to baggage in Tampa

Loved the crew! Sucks that we went from 1 hour and 8 minute layover to a 3 hour layover. But weather sucks like that.

Fast, lovely scenery, great info on the Delta flight screen about landmarks we were flying over. Great landing!

Long flight but comfortable and not freezing as I have experienced on Hawaiian flights to the islands. They gave us blankets just in case. Nice touch.

I took seat 15A in anticipation of window seat, there is no window.

Flight late, the waited for a long time for “personal” to arrive at gate to dock the plane in Rochester. So annoying. This flight was expected, why aren’t personel available for the jet bridge?

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

My flight was canceled on Sunday. Rebooking took three hours. Had to pay for accommodations another night. New flight was delayed for 5 hours, all that was sent was a 12 dollar food voucher, which doesn’t tell you how to use it. Then when we landed we had to sit on the plane for an hour before we could get off.

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

Information on your arrival and departure airports