BKK - ONT

$485 Find Cheap Flights from Bangkok to Ontario - Compare and Save

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 9/2. 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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Everything you should know

Cheapest round-trip
$816
Typical prices: $784-$912
China Airlines
Wed 9/2Tue 9/15
BKK - ONT • 1 stop
Cheapest one-way
$485
Typical prices: $479-$528
China Airlines
Wed 9/2
BKK - ONT • 1 stop
Top airlines
Cheapest • from $816 (round-trip)
Best reviews • 8.8 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
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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

Wed, Sep 2 - Tue, Sep 15
China Airlines Logo
1:20 pm - 6:40 pm
BKK
-
ONT
19h 20m
1 stop
China Airlines Logo
12:10 am - 4:20 pm
ONT
-
BKK
26h 10m
1 stop
$816China Airlines
Tue, Sep 1 - Sat, Oct 3
China Airlines Logo
5:30 pm - 6:40 pm
BKK
-
ONT
39h 10m
1 stop
China Airlines Logo
12:10 am - 4:20 pm
ONT
-
BKK
26h 10m
1 stop
$817China Airlines
Sat, Sep 19 - Wed, Oct 7
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
$819China Airlines
Mon, Oct 26 - Sat, Oct 31
China Airlines Logo
2:35 am - 6:05 pm
BKK
-
ONT
29h 30m
1 stop
China Airlines Logo
11:50 pm - 1:05 pm
ONT
-
BKK
23h 15m
1 stop
$821China Airlines
Mon, Oct 26 - Sat, Oct 31
China Airlines Logo
2:35 am - 6:05 pm
BKK
-
ONT
29h 30m
1 stop
China Airlines Logo
11:50 pm - 1:05 pm
ONT
-
BKK
23h 15m
1 stop
$822China Airlines
Mon, Oct 5 - Mon, Nov 30
STARLUX Airlines Logo
1:10 pm - 5:05 pm
BKK
-
ONT
17h 55m
1 stop
STARLUX Airlines Logo
9:45 pm - 4:30 pm
ONT
-
BKK
27h 45m
1 stop
$836STARLUX Airlines
Wed, Oct 7 - Tue, Oct 20
China Airlines Logo
5:30 pm - 6:00 pm
BKK
-
ONT
38h 30m
1 stop
China Airlines Logo
12:10 am - 12:10 pm
ONT
-
BKK
22h 00m
1 stop
$840China Airlines
Sat, Dec 12 - Sat, Jan 2
STARLUX Airlines Logo
1:45 pm - 3:55 pm
BKK
-
ONT
17h 10m
1 stop
STARLUX Airlines Logo
9:45 pm - 12:35 pm
ONT
-
BKK
23h 50m
1 stop
$852STARLUX Airlines
Wed, Nov 4 - Mon, Nov 16
STARLUX Airlines Logo
1:45 pm - 3:55 pm
BKK
-
ONT
17h 10m
1 stop
STARLUX Airlines Logo
9:45 pm - 12:35 pm
ONT
-
BKK
23h 50m
1 stop
$853STARLUX Airlines
Thu, Aug 27 - Tue, Sep 8
China Airlines Logo
1:20 pm - 6:40 pm
BKK
-
ONT
19h 20m
1 stop
China Airlines Logo
12:45 am - 12:10 pm
ONT
-
BKK
21h 25m
1 stop
$909China 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 June, where tickets cost $0 (return) on average. On the other hand, the most expensive months are July and September, where the average cost of round-trip tickets is $995 and $912 respectively.

Good to know

Low seasonFebruary
Cheapest flight$485
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly and prices are also 10% 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 5 days, the lowest price for a flight from Bangkok Suvarnabhumi Airport to Ontario was $485 for a one-way ticket and $816 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 $799 and an overall rating of 8.8, STARLUX Airlines is the most popular choice. China Airlines is also a great choice for the route, with an average price of $786 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.
8.8
STARLUX AirlinesOverall score based on 359 reviews
8.9Boarding
8.8Entertainment
9.1Crew
8.9Comfort
8.6Food
Airline reviews

Was not able to buy wifi on the plane given, not available for economy tickets. Was not clear when buying the ticket that this was the case.

8.0 Excellentjoseph, Jun 2026
TPE - SFO
Read more STARLUX Airlines reviews

Was not able to buy wifi on the plane given, not available for economy tickets. Was not clear when buying the ticket that this was the case.

FLEW IN BUSINESS CLASS OVER NIGHT FLIGHT AIRLINE BOOKED A PARENT AND ONE YEAR OLD KID PARENT ALLOWED THE KID TO DISTURB EVERYONES SLEEP A terrible flight that was expensive I have 10 grand children I love kids But to be disturbed on a over night flight is in not what I paid for I hold the air line responsible Respectfully, Al Eaddy

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.

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

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.

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.

This Airline is really good! Better than Eva air for sure and more luxury. I really liked all the small details and amenities plus it really is free alcohol!

Efficient boarding, on time departure. Cabin crew all nice looking and well dressed, helpful. Plane interior looked modern and new, fresh condition.

My husband and I like this airlines , lt looks new ,clean & good service. Then we will fly with STARLUX again. And I love their time , it is perfect for my family. See you soon.

The crew are amazing. Very professional, polite, kind, and accommodating.

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.

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.

Been flying with China Airline over years many times. Good experience with them, no issues.

The flight who provided services on my row had some not-nice attitude and not smiling at all.

My flight to Los Angeles was canceled Had to book another flight and you charged me extra $500 Very bad experience

3 of the 4 flights had delays despite the weather being fine, but still managed to make all connections

Baggage made it successfully to destination despite short layover. Appreciate that.

The plane was an older model and the entertainment was hard to enjoy on those small screens. I struggled to see clear anything I wanted to watch. The seats where a bit uncomfortable but for a 3 hours flight it was pretty ok. The rest of services were excellent. Highly recommend China Airlines to others.

this is a great airline to fly on. I have not ever had a bad experiance with China Air.

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

Information on your arrival and departure airports