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Cheap Flights from Ontario (ONT) to Bangkok (BKK)

Compare Ontario International to Bangkok Suvarnabhumi flight deals

Find the cheapest month or even day of the year to fly to Bangkok Suvarnabhumi

Book the best Bangkok Suvarnabhumi fare with no extra fees

Flight deals from Ontario International to Bangkok Suvarnabhumi

Looking for a cheap last-minute deal or the best return flight from Ontario International Airport to Bangkok Suvarnabhumi Airport? If you want to travel next month, return fares start from $1,255. Find the lowest prices on one-way and return tickets right here.
Bangkok.$1,216 per passenger.Departing Mon, 14 Sep, returning Sun, 20 Sep.Return flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Mon, 14 Sep, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Korean Air, departs from Bangkok Suvarnabhumi on Sun, 20 Sep, arriving in Ontario International.Price includes taxes and charges.From $1,216, select.
Bangkok.$1,238 per passenger.Departing Tue, 11 Aug, returning Wed, 26 Aug.Return flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Tue, 11 Aug, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Korean Air, departs from Bangkok Suvarnabhumi on Wed, 26 Aug, arriving in Ontario International.Price includes taxes and charges.From $1,238, select.
Bangkok.$1,242 per passenger.Departing Wed, 22 Jul, returning Tue, 25 Aug.Return flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Wed, 22 Jul, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Korean Air, departs from Bangkok Suvarnabhumi on Tue, 25 Aug, arriving in Ontario International.Price includes taxes and charges.From $1,242, select.
Bangkok.$1,254 per passenger.Departing Tue, 25 Aug, returning Tue, 1 Sep.Return flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Tue, 25 Aug, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Korean Air, departs from Bangkok Suvarnabhumi on Tue, 1 Sep, arriving in Ontario International.Price includes taxes and charges.From $1,254, select.
Bangkok.$1,255 per passenger.Departing Mon, 20 Jul, returning Mon, 27 Jul.Return flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Mon, 20 Jul, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Korean Air, departs from Bangkok Suvarnabhumi on Mon, 27 Jul, arriving in Ontario International.Price includes taxes and charges.From $1,255, select.
Bangkok.$1,258 per passenger.Departing Tue, 1 Sep, returning Thu, 1 Oct.Return flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Tue, 1 Sep, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Korean Air, departs from Bangkok Suvarnabhumi on Thu, 1 Oct, arriving in Ontario International.Price includes taxes and charges.From $1,258, select.
Bangkok.$1,260 per passenger.Departing Wed, 25 Nov, returning Wed, 24 Mar.Return flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Wed, 25 Nov, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Korean Air, departs from Bangkok Suvarnabhumi on Wed, 24 Mar, arriving in Ontario International.Price includes taxes and charges.From $1,260, select.
Bangkok.$1,287 per passenger.Departing Thu, 1 Oct, returning Fri, 16 Oct.Return flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Thu, 1 Oct, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Korean Air, departs from Bangkok Suvarnabhumi on Fri, 16 Oct, arriving in Ontario International.Price includes taxes and charges.From $1,287, select.
Bangkok.$1,299 per passenger.Departing Tue, 11 Aug, returning Sat, 3 Oct.Return flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Tue, 11 Aug, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Korean Air, departs from Bangkok Suvarnabhumi on Sat, 3 Oct, arriving in Ontario International.Price includes taxes and charges.From $1,299, select.
Bangkok.$1,299 per passenger.Departing Tue, 21 Jul, returning Fri, 18 Sep.Return flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Tue, 21 Jul, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Korean Air, departs from Bangkok Suvarnabhumi on Fri, 18 Sep, arriving in Ontario International.Price includes taxes and charges.From $1,299, select.
Bangkok.$1,299 per passenger.Departing Sat, 20 Feb, returning Wed, 3 Mar.Return flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Sat, 20 Feb, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Korean Air, departs from Bangkok Suvarnabhumi on Wed, 3 Mar, arriving in Ontario International.Price includes taxes and charges.From $1,299, select.
Bangkok.$1,304 per passenger.Departing Sun, 24 Jan, returning Sun, 28 Feb.Return flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Sun, 24 Jan, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Korean Air, departs from Bangkok Suvarnabhumi on Sun, 28 Feb, arriving in Ontario International.Price includes taxes and charges.From $1,304, select.
Bangkok.$1,304 per passenger.Departing Thu, 18 Mar, returning Sun, 28 Mar.Return flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Thu, 18 Mar, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Korean Air, departs from Bangkok Suvarnabhumi on Sun, 28 Mar, arriving in Ontario International.Price includes taxes and charges.From $1,304, select.
Bangkok.$1,325 per passenger.Departing Tue, 13 Oct, returning Tue, 3 Nov.Return flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Tue, 13 Oct, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Korean Air, departs from Bangkok Suvarnabhumi on Tue, 3 Nov, arriving in Ontario International.Price includes taxes and charges.From $1,325, select.
Bangkok.$1,369 per passenger.Departing Fri, 6 Nov, returning Mon, 7 Dec.Return flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Fri, 6 Nov, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Korean Air, departs from Bangkok Suvarnabhumi on Mon, 7 Dec, arriving in Ontario International.Price includes taxes and charges.From $1,369, select.
Bangkok.$1,383 per passenger.Departing Thu, 26 Nov, returning Thu, 22 Apr.Return flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Thu, 26 Nov, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Korean Air, departs from Bangkok Suvarnabhumi on Thu, 22 Apr, arriving in Ontario International.Price includes taxes and charges.From $1,383, select.

Find the cheapest month to fly from Ontario International to Bangkok Suvarnabhumi

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ontario International to Bangkok Suvarnabhumi flights are currently cheapest in September.
Jun
from $1,764
Jul
from $1,255
Aug
from $1,238
Sep
from $1,216
Oct
from $1,287
Nov
from $1,474
Dec
from $1,538
Jan
from $1,423
Feb
from $1,544
Mar
from $1,304
Apr
from $1,388
May
from $1,544

Ontario International to Bangkok Suvarnabhumi: Alternative routes

Compare routes from Ontario International to Bangkok below. You may find an airport to fly into that's cheaper, faster, or easier than Bangkok Suvarnabhumi.

Don Mueang

21km from central Bangkok
Closest
from $1,957
Search flights

Bangkok Suvarnabhumi

29km from central Bangkok
Cheapest
from $1,216
Search flights

Ontario to Bangkok: Flight information

The things to know before you go.
Cheapest flight found$1,216
Cheapest month to flySeptember

Finding cheap flights from Ontario International to Bangkok Suvarnabhumi: Frequently asked questions

The best price we found for a return flight from Ontario International to Bangkok Suvarnabhumi is $1,216. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Ontario International to Bangkok Suvarnabhumi. But we found flights with one or more stops from $1,216.
As of June 2026, there are no flights flying from Ontario International to Bangkok Suvarnabhumi.
The cheapest month to fly from Ontario International to Bangkok Suvarnabhumi is usually September.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Bangkok Suvarnabhumi Airport on Monday, 14 September 2026.
No airlines currently offer direct flights between Ontario International Airport and Bangkok Suvarnabhumi Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Bangkok Suvarnabhumi but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Bangkok is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Korean Air offers the cheapest flight tickets to Bangkok Suvarnabhumi.

Travelling from Ontario International Airport (ONT) to Suvarnabhumi Airport (BKK): what you need to know

  • Bangkok's timezone is UTC+7, making Bangkok 14 hours ahead of Ontario.

  • For a smooth journey, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This way, you'll have plenty of time to catch your ONT to BKK flight.

  • During popular months such as August, you'll want to get to the airport earlier than normal. Plan to arrive two hours before a domestic departure and four hours ahead of international flights whenever you're travelling during a peak period in general.

  • If you'd like to discover another city along the way, look for a flight with a stopover. To see your options for tickets from Ontario International Airport to Suvarnabhumi Airport, uncheck 'Direct flights only.' Taiwan Taoyuan International Airport is a well-known stop between ONT and BKK.

How to find the cheapest flights from Ontario International Airport (ONT) to Suvarnabhumi Airport (BKK)

  • The cheapest price we've seen for a one-way Ontario International Airport to Suvarnabhumi Airport flight is $607. A return ticket right now is $1,216. Depending on the availability when you book, these fares can change.

  • Don't leave things to the last minute. You're more likely to find cheap tickets from ONT to BKK if you book early. Airlines often have some great early bird discounts.

  • Finding cheap flights from Ontario International Airport to Suvarnabhumi Airport is more likely if you can be flexible with your travel dates. Use the 'Whole month' function to see the lowest prices across every month and score a great deal.

  • Spend less time searching for cheap flights from ONT to BKK by creating a Price Alert. You'll get an email or notification on the app when a special offer becomes available.

  • Tailor your trip using filters. Choose your arrival and departure times, airlines and total journey duration. You can also sort results by 'Cheapest,' 'Fastest' or 'Best' flights from Ontario International Airport to Suvarnabhumi Airport.

Handy information about Ontario International Airport (ONT)

  • The address for ONT is 2900 E. Airport Drive.

  • 83.6% of flights leaving Ontario International Airport land at their destination as planned. Given its strong on-time stats, disruptions are unlikely when taking off from ONT.

  • Ontario International Airport is around 6 kilometres from central Ontario. If you're ride-sharing, catching a cab or driving from the centre, it'll take 10 minutes or so to get there, depending on the traffic.

  • The trip on public transport takes roughly 1 hour 30 minutes.

  • Get your journey off to a hassle-free start by staying near ONT. Whether you're boarding an early flight from Ontario International Airport to Suvarnabhumi Airport or just don't want to be rushed, these stays are ideal:

Arriving at Suvarnabhumi Airport (BKK)

  • If you're landing on a late Ontario International Airport to Suvarnabhumi Airport flight, nothing tops the convenience of staying near the terminal. Pick up your bags from the carousel and then be tucked up in bed shortly after at one of these options near BKK:

  • Grab a Suvarnabhumi Airport rental car and explore Bangkok and beyond with your own wheels. Chic Car Rent, asap car hire and Hertz are top providers you can book with here.

  • To secure the lowest price, reserve your ride from Suvarnabhumi Airport about four weeks before you set off.

Getting from Suvarnabhumi Airport (BKK) to central Bangkok

  • Suvarnabhumi Airport is approximately 32 kilometres from central Bangkok. The drive time takes about 35 minutes.

  • Getting to the centre on public transport takes about 1 hour 5 minutes.

When to fly to Suvarnabhumi Airport (BKK)

  • July is the most popular month for flights from Ontario International Airport to Suvarnabhumi Airport. To escape the crowds, go to Bangkok in April.

  • The warmest month in Bangkok is April, with temperatures ranging between 26ºC (79ºF) and 37ºC (99ºF). Book your flights from Ontario International Airport to Suvarnabhumi Airport in this month if this is the type of weather you like.

  • December has average temperatures of between 19ºC (66ºF) and 33ºC (91ºF). Look for cheap tickets from ONT to BKK sometime then if you like travelling in cooler conditions.

Explore more of Thailand

  • Bangkok has loads to offer, but there are so many other corners of Thailand you'll want to see. About 467 kilometres north-east of Bangkok, a visit to Udon Thani will fill your itinerary to the brim. Start with attractions like Nong Prajak Public Park, Krom Luang Prachaksinlapakhom Monument and Chinesisches Tor.

  • If there's time to check out another side of Thailand, head for Chon Buri, roughly 64 kilometres south-east of Bangkok. Wat Ton Son, Forest and Phra Phutthasihing Hall are key highlights.

Plan the rest of your trip from Ontario to Bangkok

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.