$420 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 7/21. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Bangkok

 
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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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, Jul 23 - Mon, Aug 18
Korean Air Logo
6:25 am - 9:45 pmONT-BKK
25h 20m2 stops
Korean Air Logo
11:30 pm - 5:11 pmBKK-ONT
31h 41m2 stops
$765Korean Air
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Mon, Sep 1 - Mon, Sep 8
Korean Air Logo
6:00 am - 9:45 pmONT-BKK
25h 45m2 stops
Korean Air Logo
2:35 am - 5:11 pmBKK-ONT
28h 36m2 stops
$766Korean Air
Find Deal
Thu, Aug 7 - Tue, Aug 26
Delta Logo
6:25 am - 9:45 pmONT-BKK
25h 20m2 stops
Delta Logo
9:50 am - 10:40 pmBKK-ONT
26h 50m2 stops
$778Delta
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Wed, Jul 30 - Wed, Oct 29
Delta Logo
6:25 am - 9:45 pmONT-BKK
25h 20m2 stops
Delta Logo
9:40 am - 10:42 pmBKK-ONT
27h 02m2 stops
$779Delta
Find Deal
Tue, Sep 9 - Fri, Oct 10
United Airlines Logo
6:00 am - 4:35 amONT-BKK
32h 35m2 stops
United Airlines Logo
7:00 am - 10:42 pmBKK-ONT
29h 42m2 stops
$805United Airlines
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Wed, Aug 13 - Sun, Aug 31
China Airlines Logo
12:45 am - 9:45 amONT-BKK
19h 00m1 stop
China Airlines Logo
1:20 pm - 6:40 pmBKK-ONT
19h 20m1 stop
$822China Airlines
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Mon, Oct 20 - Tue, Nov 18
China Airlines Logo
12:10 am - 12:10 pmONT-BKK
22h 00m1 stop
China Airlines Logo
2:35 am - 4:50 pmBKK-ONT
29h 15m1 stop
$824China Airlines
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Tue, Aug 19 - Wed, Oct 29
United Airlines Logo
5:10 am - 11:55 pmONT-BKK
28h 45m2 stops
United Airlines Logo
7:10 am - 5:34 pmBKK-ONT
24h 24m2 stops
$828United Airlines
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Wed, Sep 10 - Thu, Sep 18
 Logo
12:45 am - 11:45 amONT-DMK
21h 00m1 stop
 Logo
7:25 am - 6:00 pmDMK-ONT
24h 35m1 stop
$1,033
Find Deal
Sat, Aug 30 - Mon, Sep 8
 Logo
12:45 am - 10:00 pmONT-DMK
31h 15m2 stops
 Logo
11:00 pm - 6:40 pmDMK-ONT
33h 40m2 stops
$1,058
Find Deal
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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’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 clicked on KAYAK for each day over the last 12 months.

When flying from Ontario to Bangkok, you should consider leaving on a Wednesday and avoid Fridays if you are looking for the best rates. For your return to Ontario, you’ll find the best rates on Thursdays and the most expensive ones on Fridays.

What is the cheapest month to fly from Ontario to Bangkok?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Bangkok, 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 is September, where tickets cost $868 (return) on average. On the other hand, the most expensive months are July and June, where the average cost of round-trip tickets is $1,476 and $1,371 respectively.

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

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, 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, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Cheapest flight$420
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 flights from Ontario to Bangkok

  • What is the cheapest flight from Ontario to Bangkok?

    In the last 3 days, the lowest price for a flight from Ontario to Bangkok was $420 for a one-way ticket and $765 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?

    When flying out of Ontario you will be using Ontario. You will be landing at one of these airports: Bangkok Suvarnabhumi or Bangkok Don Mueang Intl.

  • 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, and Star Alliance are the airline alliances operating flights between Ontario and Bangkok, with SkyTeam being the most commonly used for this route.

  • 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.

  • 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.

  • 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 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.
9.1
STARLUX AirlinesOverall score based on 189 reviews
9.0Boarding
8.9Food
9.3Crew
9.0Comfort
9.0Entertainment
Airline reviews

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.

2.0 MediocreAnonymous, Jun 2025SFO - TPE
Read more STARLUX Airlines reviews

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.

Greetings when you arrive on the plane and good bye when you leave. Very attentive flight attendants.

Serve me a meal, I fell asleep during the flight. So they passed me twice.

Seats are not table comfortable. Crew members are pretty good. Can be much better!!

Very pleasant overall, although the movie selection could have been better.

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety.

I usually have ear problems when planes land. But the landing was so smooth I didn’t even notice it landing! The service was excellent!

the aircraft was fine and new. The crews can have better training. Their operations are not as smooth as EVA's. They are VERY stingy with drinking water. Throughout the entire flight, no one offered me any water and snacks. I still prefer EVA after trying out Starlux initially with lots of excitement and expectations.

Everything was smooth and professional. They could improve the raw vegan meal with fresher offerings, but otherwise they are now my favorite way to fly to Asia.

Leg space is small. Need more room for long flight.

This was an amazing flight. The crew was great. The service was great. The food provided was great.

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

Unfortunately, there has been a boarding and departure delay. However, as usual, the flight arrived earlier than the scheduled. There has been a turbulence in-between, it’s unavoidable. I couldn’t complain them.

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 delay in Korea was a pain and set us back a day. I have to give big props to Korean Air for setting up a hotel with dinner and transportation to and from the hotel. I also needed assistance with a wheelchair and they did an outstanding job.

Great except for the delay in Korea. Korean Air did a great job setting up a hotel for the night. I also needed assistance with a wheelchair and they were outstanding.

The flight was on time and very quick, as expected, but the leg room isn't great in coach seats.

Sat next to a woman who had her period. Blood was on her seat and on the arm rest between us. I ended up having period blood on my jacket and shoes. Very gross!

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

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

China Airlines crews are very excellent doing their job. Very friendly and hardworking. I will always choose China Airlines over and over. Thank you all for making my flight comfortable. God bless to all the staff. :)

Most relaxing long distance flight I have been on. And I have flown on many.

It was our first time flying with China Airlines and had a very nice experience. The airline staff & crews both on the ground and air were very nice. Food on the plane was very good. Will recommend it to family and friends.

Not great, will likely try to fly another or maybe I should have upgraded my ticket? Needed Air…

I don’t think I’ll be flying them again. Tight seats, no flowing air or air nozzles that you can turn air on you, for those who could have motion sickness this would be your worst nightmare. The pilot was great and experienced (which is what you want when flying 12 hours) overall I’m thankful knowledgeable pilots!

My ticket did not indication which group I was in for boarding; the gate attended help me

Very routh cabin crew food is only 2 meals for 13 hours fry with them They should get better training how to service good super routh language and talking with customer

Boarded plane and then delayed 1.5 hours while on the plane

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

Really good 😊 the woman at the gate entrance was a little rude checking in our carry-on but i dont think she worked for the airline, she worked for the airport at sacramento, other than that amazing.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

The food was the worst I’ve had on any flight I’ve ever been on.

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Flight was late as pilot crew had to land at different airport in their previous flight. Passengers boarded and had to wait for pilots inside plane. Series of incomplete and unnecessary announcements by an annoying voice, rather than complete, informative announcements.

Breakfast was not loaded at SFO due to catering company change. Seems like a major airline at a major hub would have thought of something else or warned passengers to pick up food before boarding a 3 hour flight.

Boarding seemed to be organized bedlam. For what ever reason, preboarding took longer than 20 minutes. Made the plane 20 minutes late taking off. Luckily we arrived on time. Flight crew seemed very friendly. Only slight turbulence.

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

Information on your arrival and departure airports

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