$472 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 3/17. 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

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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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

Fri, Apr 17 - Sat, May 2
STARLUX Airlines Logo
5:50 pm - 5:05 pm
BKK
-
ONT
37h 15m
1 stop
STARLUX Airlines Logo
11:10 pm - 12:00 pm
ONT
-
BKK
22h 50m
1 stop
$774STARLUX Airlines
Thu, Apr 23 - Tue, May 5
China Airlines Logo
10:50 am - 6:00 pm
BKK
-
ONT
21h 10m
1 stop
China Airlines Logo
12:10 am - 12:10 pm
ONT
-
BKK
22h 00m
1 stop
$775China Airlines
Thu, Mar 19 - Mon, Mar 23
STARLUX Airlines Logo
5:40 pm - 4:50 pm
BKK
-
ONT
37h 10m
1 stop
STARLUX Airlines Logo
10:45 pm - 12:35 pm
ONT
-
BKK
23h 50m
1 stop
$776STARLUX Airlines
Fri, Apr 17 - Sat, May 2
STARLUX Airlines Logo
1:10 pm - 5:05 pm
BKK
-
ONT
17h 55m
1 stop
STARLUX Airlines Logo
11:10 pm - 12:00 pm
ONT
-
BKK
22h 50m
1 stop
$782STARLUX Airlines
Fri, May 1 - Wed, May 13
STARLUX Airlines Logo
1:10 pm - 5:05 pm
BKK
-
ONT
17h 55m
1 stop
STARLUX Airlines Logo
11:10 pm - 12:00 pm
ONT
-
BKK
22h 50m
1 stop
$789STARLUX Airlines
Mon, Apr 20 - Mon, Oct 12
China Airlines Logo
2:40 am - 6:00 pm
BKK
-
ONT
29h 20m
1 stop
China Airlines Logo
12:10 am - 9:45 am
ONT
-
BKK
19h 35m
1 stop
$791China Airlines
Thu, Apr 23 - Tue, May 5
China Airlines Logo
1:20 pm - 6:00 pm
BKK
-
ONT
18h 40m
1 stop
China Airlines Logo
12:10 am - 12:10 pm
ONT
-
BKK
22h 00m
1 stop
$793China Airlines
Wed, Apr 22 - Tue, May 5
China Airlines Logo
2:40 am - 6:00 pm
BKK
-
ONT
29h 20m
1 stop
China Airlines Logo
12:10 am - 4:20 pm
ONT
-
BKK
26h 10m
1 stop
$794China Airlines
Thu, Apr 23 - Tue, May 5
China Airlines Logo
10:50 am - 6:00 pm
BKK
-
ONT
21h 10m
1 stop
China Airlines Logo
12:10 am - 1:25 am
ONT
-
BKK
35h 15m
1 stop
$795China Airlines
Thu, Apr 23 - Tue, May 5
Multiple Airlines Logo
7:30 am - 6:00 pm
DMK
-
ONT
24h 30m
2 stops
Multiple Airlines Logo
12:10 am - 5:35 pm
ONT
-
DMK
27h 25m
2 stops
$1,010Multiple Airlines
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 March, where tickets cost $728 on average for one-way flights. On the other hand, the most expensive months are April and July, where the average cost of tickets from Thailand is $1,092 and $1,052 respectively. For return trips, the best month to travel is March with an average price of $728.

Good to know

Low seasonOctober
Cheapest flight$472
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly and prices are also 15% lower on average.
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.

  • 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.

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

    Each week there are around 549 direct flights from within Thailand to Ontario. The most common day for departures is Friday, 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 airlines 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.
8.9
STARLUX AirlinesOverall score based on 279 reviews
9.2Crew
8.9Comfort
8.8Entertainment
8.9Boarding
8.7Food
Airline reviews

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

10.0 ExcellentChris, Mar 2026
CRK - TPE
Read more STARLUX Airlines reviews

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.

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 .

Well, we upgraded and on a 14 hour flight not sure how we would tolerate it otherwise. The upgrades are ridiculously expensive and even with empty seats even in first class it was difficult to upgrade. Probably won’t fly China Air again due to this. The attendants tho were much better than the airlines in the states and there attentiveness and care for your comfort far exceeds other airlines in the states.

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.

Hour late but understandable under the conditions. Taoyuan airport could have clearer signs language wise and more staff to help direct people.

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.

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.

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario