ONT - BKK

$427 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 4/30. 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
$827
Typical prices: $854-$770
Multiple Airlines
Sun 8/30Sun 9/20
ONT - BKK • 2 stops
Cheapest one-way
$411
Typical prices: $454-$606
Multiple Airlines
Thu 4/30
ONT - BKK • 2 stops
Top airlines
Cheapest • from $902 (round-trip)
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 Ontario and Bangkok. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $697 (round-trip)
Shortest trip • 19h 35m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 20% price drop
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

Sun, Aug 30 - Sun, Sep 20
Multiple Airlines Logo
3:02 pm - 8:55 am
ONT
-
BKK
27h 53m
2 stops
Multiple Airlines Logo
5:50 pm - 5:05 pm
BKK
-
ONT
37h 15m
1 stop
$827Multiple Airlines
Sun, May 3 - Mon, May 18
Multiple Airlines Logo
9:19 am - 8:55 am
ONT
-
BKK
33h 36m
2 stops
Multiple Airlines Logo
10:50 am - 6:00 pm
BKK
-
ONT
21h 10m
1 stop
$862Multiple Airlines
Sun, Sep 13 - Sun, Oct 4
Multiple Airlines Logo
3:09 pm - 8:55 am
ONT
-
BKK
27h 46m
2 stops
Multiple Airlines Logo
9:05 pm - 10:39 pm
BKK
-
ONT
39h 34m
2 stops
$891Multiple Airlines
Mon, Aug 10 - Thu, Sep 3
Delta Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Delta Logo
9:50 am - 11:44 pm
BKK
-
ONT
27h 54m
2 stops
$902Delta
Sun, Oct 11 - Wed, Oct 21
Delta Logo
6:00 am - 9:45 pm
ONT
-
BKK
25h 45m
2 stops
Delta Logo
9:50 am - 5:17 pm
BKK
-
ONT
21h 27m
2 stops
$903Delta
Fri, Sep 11 - Sun, Sep 27
Korean Air Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Korean Air Logo
2:35 am - 5:16 pm
BKK
-
ONT
28h 41m
2 stops
$908Korean Air
Thu, Apr 30 - Mon, May 25
Korean Air Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Korean Air Logo
2:35 am - 5:10 pm
BKK
-
ONT
28h 35m
2 stops
$925Korean Air
Mon, Aug 31 - Sat, Oct 31
Multiple Airlines Logo
8:33 pm - 8:55 am
ONT
-
BKK
22h 22m
2 stops
Multiple Airlines Logo
5:50 pm - 5:50 pm
BKK
-
ONT
38h 00m
1 stop
$927Multiple Airlines
Wed, Sep 2 - Wed, Sep 23
Delta Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Delta Logo
9:50 am - 10:40 pm
BKK
-
ONT
26h 50m
2 stops
$932Delta
Thu, Oct 1 - Tue, Oct 13
Korean Air Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Korean Air Logo
9:40 pm - 5:17 pm
BKK
-
ONT
33h 37m
2 stops
$937Korean Air
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 August.

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 $764 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,424 and $1,347 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 26 weeks before departure.

Good to know

Low seasonAugust
Cheapest flight$411
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly and prices are also 16% 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 $411 for a one-way ticket and $827 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 $819 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 $788 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 4 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 299 reviews
9.2Crew
8.9Comfort
9.0Boarding
8.8Entertainment
8.6Food
Airline reviews

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

2.0 MediocreAlbert, Apr 2026
BKK - TPE
Read more STARLUX Airlines reviews

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

I liked everything but I flew business class and StarLux booked another passenger and a one year old , in business class The child cried 80 percent of the flight, the flight was a long 13 hour flight. I’m 75 and I have 10 grand children, I love kids But with that said it still made it not and enjoyable flight. Ask your great flight attendance what they think of the situation, they had to deal with. Let me know what they said Respectfully, Al Eaddy

Everything is smooth. Very good. Except flight arrived SFO 30min late.

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.

Got dinner and breakfast! They had mahjong game in entertainment system. Current movies. Loved the slippers, sleeping mask packet. Great experience for a long flight

Leg room was great. Friendly crew. Food is great. Crew always kept the toilet clean.

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.

AAAAHHHH... It was shocking in a very positive way, the attention to detail, the courtesy, the manners of all personnel on board, the constant honest smiling. You can see and feel they take pride in all they do no matter how trivial. The plane in general was very comfortable. I can't wait to do it again

Lousy entertainment system. Crews are excellent. Meal is just mediocre.

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

We really enjoyed our flight to Seattle. The food was great and service was attentive.

The crew was very professional and friendly. Although there was a water leak from panel above, the crew was trying to mitigate the consequence. We are happy with its service and the value offered. We will definitely take China Airlines again.

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.

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.

While they turned off most cabin lights to allow people to sleep, I was bothered by how bright the side lights still were. It was still quite bright for me in a window seat, when I wish I could have slept!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

N Everything was perfect from boarding to assistance to baggage in Tampa

Loved the crew! Sucks that we went from 1 hour and 8 minute layover to a 3 hour layover. But weather sucks like that.

Fast, lovely scenery, great info on the Delta flight screen about landmarks we were flying over. Great landing!

Long flight but comfortable and not freezing as I have experienced on Hawaiian flights to the islands. They gave us blankets just in case. Nice touch.

I took seat 15A in anticipation of window seat, there is no window.

Flight late, the waited for a long time for “personal” to arrive at gate to dock the plane in Rochester. So annoying. This flight was expected, why aren’t personel available for the jet bridge?

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

My flight was canceled on Sunday. Rebooking took three hours. Had to pay for accommodations another night. New flight was delayed for 5 hours, all that was sent was a 12 dollar food voucher, which doesn’t tell you how to use it. Then when we landed we had to sit on the plane for an hour before we could get off.

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

Information on your arrival and departure airports