ONT - BKK

$321 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 8/4. 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
Travelers love KAYAK
41.299.237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$612
Overall average: $867
Delta
Tue 4/21Wed 5/6
ONT - BKK • 2 stops
Cheapest one-way
$321
Typical prices: $448-$464
Delta
Tue 8/4
ONT - BKK • 2 stops
Top airlines
Delta
Cheapest • from $612 (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 Ontario and Bangkok. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Incheon (ICN)
Cheapest • Avg $695 (round-trip)
Hong Kong (HKG)
Shortest trip • 20h 25m (one-way)
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 19% price drop
November
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

Tue, Apr 21 - Wed, May 6
Delta Logo
7:00 am - 11:35 pm
ONT
-
BKK
26h 35m
2 stops
Delta Logo
9:50 am - 10:37 pm
BKK
-
ONT
26h 47m
2 stops
$612Delta
Tue, Apr 14 - Wed, May 6
Korean Air Logo
7:00 am - 1:35 pm
ONT
-
BKK
40h 35m
2 stops
Korean Air Logo
9:40 pm - 5:10 pm
BKK
-
ONT
33h 30m
2 stops
$617Korean Air
Mon, Aug 10 - Thu, Sep 10
Delta Logo
6:00 am - 11:35 pm
ONT
-
BKK
27h 35m
2 stops
Delta Logo
9:50 am - 11:44 pm
BKK
-
ONT
27h 54m
2 stops
$623Delta
Mon, Apr 20 - Sun, May 3
Korean Air Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Korean Air Logo
9:50 am - 5:15 pm
BKK
-
ONT
45h 25m
2 stops
$631Korean Air
Sun, Apr 19 - Wed, May 6
Delta Logo
7:00 am - 11:35 pm
ONT
-
BKK
26h 35m
2 stops
Delta Logo
9:50 am - 10:37 pm
BKK
-
ONT
26h 47m
2 stops
$637Delta
Sat, Apr 18 - Wed, May 6
Delta Logo
5:59 pm - 11:35 pm
ONT
-
BKK
39h 36m
2 stops
Delta Logo
9:40 pm - 5:10 pm
BKK
-
ONT
33h 30m
2 stops
$642Delta
Thu, Aug 13 - Wed, Sep 2
Korean Air Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Korean Air Logo
9:50 am - 11:44 pm
BKK
-
ONT
27h 54m
2 stops
$650Korean Air
Sun, Apr 26 - Sat, May 9
Korean Air Logo
7:00 am - 11:35 pm
ONT
-
BKK
26h 35m
2 stops
Korean Air Logo
11:30 pm - 5:10 pm
BKK
-
ONT
31h 40m
2 stops
$659Korean Air
Sun, Apr 19 - Sun, May 3
Korean Air Logo
7:00 am - 11:35 pm
ONT
-
BKK
26h 35m
2 stops
Korean Air Logo
9:40 pm - 5:15 pm
BKK
-
ONT
33h 35m
2 stops
$660Korean Air
Tue, Apr 21 - Wed, May 13
Delta Logo
7:00 am - 11:35 pm
ONT
-
BKK
26h 35m
2 stops
Delta Logo
9:50 am - 5:10 pm
BKK
-
ONT
21h 20m
2 stops
$661Delta
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 $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 $1,452 and $1,332 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 5 weeks before departure.

Good to know

Low seasonAugust
Cheapest flight$321
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly and prices are also 13% 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 $321 for a one-way ticket and $612 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 $812 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 279 reviews
8.9Boarding
8.8Entertainment
8.7Food
9.2Crew
8.9Comfort
Airline reviews

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

10.0 ExcellentChris, Mar 2026
CRK - TPE
Read more STARLUX Airlines reviews

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.

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 .

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.

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.

Overall was a lovely experience. The crew were kind and courteous throughout the entire flight.

Flight was delayed by 3-hours and their fix was… complimentary pretzels.

The crew, and fellow passengers, were super gracious and kind. There seemed to be plenty of bin space even though the plane was full. It’s nice to get a glass of wine with dinner in Premiere seating, and there was a lot of food.

Everything I mentioned earlier - the airbus was more comfortable indeed and the experience was further enhanced.

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

Awesome! On time flight, early arrival, and a complimentary upgrade!

It was nt delta. It was aeromexo. Service was awful. They served a very small drink and NO snack for a 3hr and 35min flight. Then for the first 30 min of the flight is was talk and talk over head interruption the movie/ show i picked to watch.

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

The flight was delayed for about 2 hrs. Other than it, it was good.

I am extremely disappointed that delta internal pilot manuals now refer to the Gulf of Mexico as the “gulf of America”. You can bow down to the Orange turd on your own. I will never fly delta again

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

Information on your arrival and departure airports