ONT - BKK

$371 Find Cheap Flights from Ontario to Bangkok

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 3/17. 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 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
$731
Typical prices: $819-$1,069
China Airlines
Tue 1/20Tue 2/24
ONT - BKK • 1 stop
Cheapest one-way
$371
Typical prices: $485-$520
Korean Air
Tue 3/17
ONT - BKK • 2 stops
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 8% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
October
Cheapest • 19% price drop
November
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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 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

Tue, Jan 20 - Tue, Feb 24
China Airlines Logo
10:50 pm - 1:05 pmONT-BKK
23h 15m1 stop
China Airlines Logo
10:55 am - 4:50 pmBKK-ONT
20h 55m1 stop
$731China Airlines
Find Deal
Mon, Jan 19 - Thu, Jan 29
China Airlines Logo
10:50 pm - 1:05 pmONT-BKK
23h 15m1 stop
China Airlines Logo
2:35 am - 4:50 pmBKK-ONT
29h 15m1 stop
$733China Airlines
Find Deal
Sat, Jan 24 - Sat, May 16
United Airlines Logo
6:32 pm - 11:25 amONT-BKK
25h 53m2 stops
United Airlines Logo
7:00 am - 5:47 pmBKK-ONT
24h 47m2 stops
$734United Airlines
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Sat, Mar 28 - Tue, Apr 14
China Airlines Logo
12:10 am - 9:45 amONT-BKK
19h 35m1 stop
China Airlines Logo
1:20 pm - 6:00 pmBKK-ONT
18h 40m1 stop
$736China Airlines
Find Deal
Sun, Jan 18 - Sat, Jan 31
China Airlines Logo
10:50 pm - 1:35 amONT-BKK
35h 45m1 stop
China Airlines Logo
2:35 am - 4:50 pmBKK-ONT
29h 15m1 stop
$739China Airlines
Find Deal
Tue, May 12 - Sat, May 30
Korean Air Logo
7:00 am - 1:15 pmONT-BKK
40h 15m2 stops
Korean Air Logo
2:35 am - 5:16 pmBKK-ONT
28h 41m2 stops
$740Korean Air
Find Deal
Mon, Jan 26 - Tue, Feb 3
China Airlines Logo
10:50 pm - 4:45 pmONT-BKK
26h 55m1 stop
China Airlines Logo
2:35 am - 4:50 pmBKK-ONT
29h 15m1 stop
$742China Airlines
Find Deal
Tue, Feb 24 - Thu, Mar 5
United Airlines Logo
6:00 am - 5:10 amONT-BKK
32h 10m2 stops
United Airlines Logo
4:55 pm - 10:57 pmBKK-ONT
21h 02m2 stops
$743United Airlines
Find Deal
Mon, Mar 2 - Tue, Mar 17
Delta Logo
7:30 am - 12:45 amONT-BKK
26h 15m2 stops
Delta Logo
11:15 pm - 10:34 pmBKK-ONT
37h 19m2 stops
$744Delta
Find Deal
Thu, Jan 8 - Tue, Feb 24
China Airlines Logo
10:50 pm - 1:05 pmONT-BKK
23h 15m1 stop
China Airlines Logo
2:35 am - 4:50 pmBKK-ONT
29h 15m1 stop
$745China Airlines
Find Deal
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.

How much is a round-trip flight from Ontario to Bangkok Suvarnabhumi Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Ontario to Bangkok Suvarnabhumi Airport departing in January.

What’s the cheapest day of the week to fly from Ontario to Bangkok?

The average price of all round-trip flights from Ontario to Bangkok Suvarnabhumi Airport clicked on KAYAK for each day over the last 12 months.

For Ontario to Bangkok, Wednesday is the cheapest day to fly on average and Friday is the most expensive. Flying from Bangkok back to Ontario, the best deals are generally found on Thursday, with Friday being the most expensive.

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 October, where tickets cost $808 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,456 and $1,337 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 2 weeks before departure, which saves you about 8% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonAugust
Cheapest flight$371
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly and prices are also 17% lower on average.
Flight from Ontario to Bangkok

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 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 $371 for a one-way ticket and $733 for a round-trip.

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

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

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

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

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

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

  • Which airline alliances offer flights from Ontario to Bangkok?

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

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

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

  • 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 $832 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 $805 and an overall rating of 8.4.

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

    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.

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

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

    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 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?

    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 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 237 reviews
8.9Entertainment
8.7Food
9.2Crew
8.9Comfort
9.0Boarding
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.

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.

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.

I did not like how the plane landed. It was not smooth.

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

Information on your arrival and departure airports