ONT - BKK

$287 Find Cheap Flights from Ontario to Bangkok Suvarnabhumi Airport

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 Bangkok departing on 3/10. 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 Bangkok Suvarnabhumi Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Bangkok, 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 Ontario to Bangkok, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$724
Overall average: $910
United Airlines
Wed 4/8Wed 4/29
ONT - BKK • 2 stops
Cheapest one-way
$287
Typical prices: $484-$541
Korean Air
Tue 3/10
ONT - BKK • 2 stops
Top airlines
United Airlines
Cheapest • from $726 (round-trip)
STARLUX Airlines
Best reviews • 8.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
January
Cheapest • 21% price drop
October
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 Bangkok!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Bangkok (ONT-BKK)

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

Wed, Apr 8 - Wed, Apr 29
United Airlines Logo
11:05 am - 9:45 am
ONT
-
BKK
32h 40m
2 stops
United Airlines Logo
9:35 am - 10:45 pm
BKK
-
ONT
27h 10m
2 stops
$724United Airlines
Sun, Feb 1 - Sat, Feb 7
United Airlines Logo
6:00 am - 5:10 am
ONT
-
BKK
32h 10m
2 stops
United Airlines Logo
9:10 am - 5:43 pm
BKK
-
ONT
47h 33m
2 stops
$725United Airlines
Tue, Apr 7 - Thu, May 21
United Airlines Logo
11:05 am - 9:45 am
ONT
-
BKK
32h 40m
2 stops
United Airlines Logo
7:00 am - 11:06 pm
BKK
-
ONT
30h 06m
2 stops
$727United Airlines
Sun, Feb 22 - Thu, Apr 30
United Airlines Logo
6:09 am - 11:25 am
ONT
-
BKK
38h 16m
2 stops
United Airlines Logo
9:35 am - 10:59 pm
BKK
-
ONT
27h 24m
2 stops
$729United Airlines
Wed, Mar 18 - Wed, Apr 29
United Airlines Logo
6:15 am - 11:25 am
ONT
-
BKK
39h 10m
2 stops
United Airlines Logo
9:35 am - 12:22 pm
BKK
-
ONT
40h 47m
2 stops
$730United Airlines
Thu, Apr 9 - Fri, Apr 24
United Airlines Logo
6:00 am - 9:45 am
ONT
-
BKK
37h 45m
2 stops
United Airlines Logo
7:00 am - 10:45 pm
BKK
-
ONT
29h 45m
2 stops
$732United Airlines
Sat, Apr 25 - Sat, May 23
United Airlines Logo
1:27 pm - 9:45 am
ONT
-
BKK
30h 18m
2 stops
United Airlines Logo
9:35 am - 11:06 pm
BKK
-
ONT
27h 31m
2 stops
$733United Airlines
Mon, Mar 2 - Tue, Mar 10
United Airlines Logo
6:10 am - 5:10 am
ONT
-
BKK
32h 00m
2 stops
United Airlines Logo
4:55 pm - 12:18 pm
BKK
-
ONT
33h 23m
2 stops
$735United Airlines
Thu, Apr 9 - Mon, Apr 27
Delta Logo
6:00 am - 11:40 pm
ONT
-
BKK
27h 40m
2 stops
Delta Logo
9:50 am - 5:15 pm
BKK
-
ONT
21h 25m
2 stops
$736Delta
Thu, Jan 29 - Sun, Feb 8
Multiple Airlines Logo
6:39 pm - 11:25 am
ONT
-
BKK
25h 46m
2 stops
Multiple Airlines Logo
4:55 pm - 10:53 pm
BKK
-
ONT
20h 58m
2 stops
$737Multiple Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Bangkok flights

Get data-powered insights and trends into flights from Ontario to Bangkok 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 Bangkok Suvarnabhumi Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Bangkok Suvarnabhumi Airport, 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 Bangkok Suvarnabhumi Airport is January, where tickets cost $769 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,452 and $1,331 respectively.

How far in advance should I book a flight from Ontario to Bangkok Suvarnabhumi Airport?

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 Bangkok Suvarnabhumi Airport, 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 Bangkok Suvarnabhumi Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Good to know

Low seasonAugust
Cheapest flight$287
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly and prices are also 17% lower on average.
Flight from Ontario to Bangkok Suvarnabhumi Airport

When to book flights from Ontario to Bangkok

Are your dates flexible? Find out the best times to travel from Ontario to Bangkok 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 Ontario to Bangkok Suvarnabhumi Airport flights

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

    In the last 3 days, the lowest price for a flight from Ontario to Bangkok Suvarnabhumi Airport was $287 for a one-way ticket and $724 for a round-trip.

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

    Yes, you'll most likely have to show a valid passport before boarding the plane in Ontario and on arrival in Bangkok Suvarnabhumi Airport.

  • Which airports will I be using when flying from Ontario to Bangkok Suvarnabhumi Airport?

    Ontario airport is called Ontario and the only airport in Bangkok Suvarnabhumi Airport is Bangkok Suvarnabhumi.

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

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

  • Which airline alliances offer flights from Ontario to Bangkok Suvarnabhumi Airport?

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

  • What is the most popular layover when flying to Bangkok Suvarnabhumi Airport from Ontario?

    Taipei City is the most popular layover city among KAYAK users traveling from Ontario to Bangkok Suvarnabhumi Airport.

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

    The two airlines most popular with KAYAK users for flights from Ontario to Bangkok are STARLUX Airlines and Korean Air. With an average price for the route of $822 and an overall rating of 8.9, STARLUX Airlines is the most popular choice. Korean Air is also a great choice for the route, with an average price of $793 and an overall rating of 8.4.

  • How does KAYAK find such low prices on flights from Ontario to Bangkok Suvarnabhumi Airport?

    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 Bangkok Suvarnabhumi Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Bangkok Suvarnabhumi Airport from 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 from Ontario to Bangkok Suvarnabhumi Airport?

    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 Bangkok Suvarnabhumi Airport with an airline and back to Ontario with another airline. Booking your flights between Ontario and BKK 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 Ontario to Bangkok Suvarnabhumi Airport?

    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 Bangkok Suvarnabhumi Airport from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Ontario to Bangkok

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Bangkok. 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 Ontario to Bangkok? 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 264 reviews
8.8Comfort
8.9Boarding
9.1Crew
8.8Entertainment
8.6Food
Airline reviews

Crew is very attentive. Another new airbus 350-900 plane. Very modern.

10.0 ExcellentRick, Jan 2026
TPE - SEA
Read more STARLUX Airlines reviews

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

I went to the gate that showed on the flight board but they changed gates at the last minute and I missed my flight. I had to buy new ticket from EVA air to Manila and take 3 hour bus ride back to my home. Will never fly Starlux again!

Starlux was great service and awesome food and drinks👍🏼 will take starlux again for my next vacation👍🏼

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 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

They did an excellent job helping me with a wheelchair. I couldn’t have asked for any better help.

Flight attendants. Food, entertainment and most of all, be on time.

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 flat bed full lying position is not comfortable at all, this could be improved, it is at an awkward position which i dont have the same issues with other airlines business class.

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.

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

They need to improve on how the plane lands cause it was not smooth at all.

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

Information on your arrival and departure airports