BKK - ONT

$456 Find Cheap Flights from Bangkok 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 from Bangkok to Ontario departing on 3/25. 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 in flight searches from Bangkok to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Bangkok to Ontario, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$749
Overall average: $1,092
China Airlines
Thu 4/16Tue 4/28
BKK - ONT • 1 stop
Cheapest one-way
$456
Typical prices: $518-$699
China Airlines
Wed 3/25
BKK - ONT • 1 stop
Top airlines
China Airlines
Cheapest • from $749 (round-trip)
STARLUX Airlines
Best reviews • 8.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Bangkok and Ontario. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
When to travel
March
Cheapest • 15% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Bangkok to Ontario (BKK-ONT)

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

Thu, Apr 16 - Tue, Apr 28
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
$749China Airlines
Thu, Apr 16 - Wed, Apr 29
Multiple Airlines Logo
10:50 am - 6:00 pm
BKK
-
ONT
21h 10m
1 stop
Multiple Airlines Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
$754Multiple Airlines
Thu, Apr 16 - Tue, Apr 28
China Airlines Logo
1:20 pm - 6:00 pm
BKK
-
ONT
18h 40m
1 stop
China Airlines Logo
12:10 am - 4:20 pm
ONT
-
BKK
26h 10m
1 stop
$756China Airlines
Thu, Apr 16 - Wed, Apr 29
Multiple Airlines Logo
10:50 am - 6:00 pm
BKK
-
ONT
21h 10m
1 stop
Multiple Airlines Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
$760Multiple Airlines
Wed, Apr 29 - Tue, May 12
China Airlines Logo
10:50 am - 6:00 pm
BKK
-
ONT
21h 10m
1 stop
China Airlines Logo
12:10 am - 9:45 am
ONT
-
BKK
19h 35m
1 stop
$765China Airlines
Fri, Mar 20 - Mon, Mar 23
China Airlines Logo
2:05 pm - 5:50 pm
BKK
-
ONT
17h 45m
1 stop
China Airlines Logo
11:50 pm - 1:05 pm
ONT
-
BKK
23h 15m
1 stop
$768China Airlines
Thu, Apr 16 - Tue, Apr 28
China Airlines Logo
1:20 pm - 6:00 pm
BKK
-
ONT
18h 40m
1 stop
China Airlines Logo
12:10 am - 4:20 pm
ONT
-
BKK
26h 10m
1 stop
$771China Airlines
Fri, Mar 20 - Mon, Mar 23
China Airlines Logo
10:55 am - 5:50 pm
BKK
-
ONT
20h 55m
1 stop
China Airlines Logo
11:50 pm - 1:05 pm
ONT
-
BKK
23h 15m
1 stop
$772China Airlines
Thu, Mar 12 - Sun, Mar 15
China Airlines Logo
2:05 pm - 5:50 pm
BKK
-
ONT
17h 45m
1 stop
China Airlines Logo
11:50 pm - 1:05 pm
ONT
-
BKK
23h 15m
1 stop
$781China Airlines
Sat, Jun 20 - Tue, Jul 28
Multiple Airlines Logo
5:30 pm - 6:00 pm
BKK
-
ONT
38h 30m
1 stop
Multiple Airlines Logo
7:00 am - 11:35 pm
ONT
-
BKK
26h 35m
2 stops
$803Multiple Airlines
Booking Insights

KAYAK's insights & trends for Bangkok to Ontario flights

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

What is the cheapest month to fly from Bangkok Suvarnabhumi Airport to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Bangkok Suvarnabhumi Airport 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 from Bangkok Suvarnabhumi Airport to Ontario is March, where tickets cost $728 (return) on average. On the other hand, the most expensive months are April and July, where the average cost of round-trip tickets is $1,092 and $1,052 respectively.

Good to know

Low seasonOctober
Cheapest flight$456
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

When to book flights from Bangkok to Ontario

Are your dates flexible? Find out the best times to travel from Bangkok to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Bangkok to Ontario flights

  • What is the cheapest flight from Bangkok Suvarnabhumi Airport to Ontario?

    In the last 3 days, the lowest price for a flight from Bangkok Suvarnabhumi Airport to Ontario was $456 for a one-way ticket and $749 for a round-trip.

  • Do I need a passport to fly between Bangkok and Ontario?

    A passport is required to fly from Bangkok to Ontario.

  • Which aircraft models fly most regularly from Bangkok to Ontario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Bangkok to Ontario?

    SkyTeam is the only airline alliance operating flights between Bangkok and Ontario.

  • Which is the best airline for flights from Bangkok to Ontario, STARLUX Airlines or China Airlines?

    The two airlines most popular with KAYAK users for flights from Bangkok to Ontario are STARLUX Airlines and China Airlines. With an average price for the route of $850 and an overall rating of 8.9, STARLUX Airlines is the most popular choice. China Airlines is also a great choice for the route, with an average price of $960 and an overall rating of 8.3.

  • How does KAYAK find such low prices on flights from Bangkok 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 from Bangkok to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Bangkok 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 Bangkok 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 to Bangkok with another airline. Booking your flights between Bangkok and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Bangkok 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 from Bangkok up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Bangkok to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Bangkok to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Bangkok 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 274 reviews
9.2Crew
8.9Comfort
8.7Food
8.9Boarding
8.8Entertainment
Airline reviews

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.

10.0 ExcellentAdam, Feb 2026
SEA - TPE
Read more STARLUX Airlines reviews

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 .

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

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.

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.

Sat next to a woman who had her period. Blood was on her seat and on the arm rest between us. I ended up having period blood on my jacket and shoes. Very gross!

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

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

Information on your arrival and departure airports