$424 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 12/27. 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, Jan 23 - Sat, Jan 24
China Airlines Logo
10:55 am - 4:50 pmBKK-ONT
20h 55m1 stop
China Airlines Logo
10:50 pm - 4:45 pmONT-BKK
26h 55m1 stop
$697China Airlines
Find Deal
Thu, Jan 22 - Wed, Feb 4
STARLUX Airlines Logo
5:40 pm - 3:50 pmBKK-ONT
37h 10m1 stop
STARLUX Airlines Logo
9:45 pm - 12:35 pmONT-BKK
23h 50m1 stop
$698STARLUX Airlines
Find Deal
Tue, Mar 3 - Fri, Mar 13
STARLUX Airlines Logo
5:40 pm - 3:50 pmBKK-ONT
37h 10m1 stop
STARLUX Airlines Logo
10:45 pm - 4:30 pmONT-BKK
27h 45m1 stop
$699STARLUX Airlines
Find Deal
Wed, Nov 26 - Wed, Dec 3
STARLUX Airlines Logo
1:45 pm - 3:50 pmBKK-ONT
17h 05m1 stop
STARLUX Airlines Logo
9:45 pm - 12:35 pmONT-BKK
23h 50m1 stop
$705STARLUX Airlines
Find Deal
Wed, Feb 25 - Wed, Mar 4
STARLUX Airlines Logo
1:45 pm - 3:50 pmBKK-ONT
17h 05m1 stop
STARLUX Airlines Logo
9:45 pm - 4:30 pmONT-BKK
27h 45m1 stop
$707STARLUX Airlines
Find Deal
Thu, Dec 4 - Fri, Dec 12
STARLUX Airlines Logo
5:40 pm - 3:50 pmBKK-ONT
37h 10m1 stop
STARLUX Airlines Logo
9:45 pm - 12:35 pmONT-BKK
23h 50m1 stop
$710STARLUX Airlines
Find Deal
Mon, Dec 15 - Mon, Dec 29
STARLUX Airlines Logo
1:45 pm - 3:50 pmBKK-ONT
17h 05m1 stop
STARLUX Airlines Logo
9:45 pm - 12:35 pmONT-BKK
23h 50m1 stop
$712STARLUX Airlines
Find Deal
Mon, Mar 9 - Sun, Mar 15
China Airlines Logo
10:55 am - 5:50 pmBKK-ONT
20h 55m1 stop
China Airlines Logo
11:50 pm - 4:45 pmONT-BKK
26h 55m1 stop
$718China Airlines
Find Deal
Sun, Dec 7 - Thu, Dec 11
China Airlines Logo
2:35 am - 4:50 pmBKK-ONT
29h 15m1 stop
China Airlines Logo
10:50 pm - 1:35 amONT-BKK
35h 45m1 stop
$725China Airlines
Find Deal
Wed, Nov 26 - Wed, Dec 3
Multiple Airlines Logo
1:45 pm - 3:50 pmBKK-ONT
17h 05m1 stop
Multiple Airlines Logo
6:40 am - 9:30 pmONT-BKK
23h 50m2 stops
$796Multiple Airlines
Find Deal

Everything you should know

When to travel
December
Cheapest • 20% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$697
Overall average: $1,039
China Airlines
Fri 1/23Sat 1/24
BKK - ONT • 1 stop
Cheapest one-way
$424
Typical prices: $519-$592
STARLUX Airlines
Sat 12/27
BKK - ONT • 1 stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
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 December, where tickets cost $735 on average for one-way flights. On the other hand, the most expensive months are July and January, where the average cost of tickets from Thailand is $1,054 and $1,039 respectively. For return trips, the best month to travel is December with an average price of $735.

Good to know

Low seasonSeptember
Cheapest flight$424
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 14% 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 tickets can be as cheap as $891. On the other hand, the most expensive day to fly is Friday, where 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 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 744 direct flights from within Thailand to Ontario. The most common day for departures is Monday, 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 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 219 reviews
8.9Boarding
9.2Crew
8.7Food
8.9Comfort
8.8Entertainment
Airline reviews

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.

10.0 ExcellentBrian, Oct 2025SIN - TPE
Read more STARLUX Airlines reviews

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.

Flight cancelled due to inclement weather yet rival airline EVA Air with the same route departed 2 hours later and landed safely while our flight was cancelled and rescheduled for 36 hours later.

The staff in air and on land went above and beyond! I would definately recommend and we will fly Starlux again!

I need Starlux to respond to my complaint and issues for my flight.

Someon vomit during boarding. My seat was next to the vomit. I asked crew member to switch seat, but they said it was a full flight. I had my baby with me. My baby got sick after the flight. He was in the hospital for 2 days.

The airplane so clean and they have a nice crew

it they come out with resent movie and good food

The crew could have been kinder and less pushy. The premium economy seats don't have enough cushion. The seats are to hard and the flight became painful and uncomfortable after an hour of flying.

Aircraft is new and toilets are spacious, but toilets are quite filthy. They should clean more often. They have a long list of drink offer but are actually not available during meal. They said they’ll come back with them and you don’t get them until after dinner which means you eat your meals without any drinks if you were to get something that they don’t have on the cart. They are strict about removing headphones during take off and landing which is new to us since the movies did not get turned off. Instead, we we’re forced to watch their commercials during that time. We probably would fly with them again but not with the cost we spent. For the record, I work in tourism and travel a lot for inspections.

Our transit in Taipei was disappointing. The ground crew could not tell us where the lounge was located, so we wasted 15 minutes trying to find it. The airline has a great review, but our experience says otherwise.

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.

Staff was so nice and very helpful with directions aswell!

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.

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

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