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Cheap Flights from Ontario International to Bangkok

Compare Ontario International to Bangkok flight deals

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

Book the best Bangkok fare with no extra fees

Flight deals from Ontario International to Bangkok

Looking for a cheap last-minute deal or the best return flight from Ontario International Airport to Bangkok? If you want to travel next month, return fares start from Rs236,177. Find the lowest prices on one-way and return tickets right here.
Bangkok.Rs119,895 per passenger.Departing Wed, 15 Jul.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Ontario International on Wed, 15 Jul, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs119,895, select.
Bangkok.Rs125,517 per passenger.Departing Thu, 27 Aug.One-way flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Thu, 27 Aug, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs125,517, select.
Bangkok.Rs125,517 per passenger.Departing Fri, 9 Oct.One-way flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Fri, 9 Oct, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs125,517, select.
Bangkok.Rs130,469 per passenger.Departing Sat, 5 Sep.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Ontario International on Sat, 5 Sep, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs130,469, select.
Bangkok.Rs130,886 per passenger.Departing Wed, 11 Nov.One-way flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Wed, 11 Nov, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs130,886, select.
Bangkok.Rs132,560 per passenger.Departing Fri, 24 Apr.One-way flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Fri, 24 Apr, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs132,560, select.
Bangkok.Rs133,193 per passenger.Departing Mon, 11 May.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Ontario International on Mon, 11 May, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs133,193, select.
Bangkok.Rs134,148 per passenger.Departing Wed, 3 Mar.One-way flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Wed, 3 Mar, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs134,148, select.
Bangkok.Rs135,031 per passenger.Departing Wed, 2 Dec.One-way flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Wed, 2 Dec, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs135,031, select.
Bangkok.Rs135,031 per passenger.Departing Sat, 30 Jan.One-way flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Sat, 30 Jan, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs135,031, select.
Bangkok.Rs135,244 per passenger.Departing Sat, 6 Feb.One-way flight with Korean Air.Outbound indirect flight with Korean Air, departs from Ontario International on Sat, 6 Feb, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs135,244, select.
Bangkok.Rs158,841 per passenger.Departing Mon, 1 Jun.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Ontario International on Mon, 1 Jun, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs158,841, select.
Bangkok.Rs168,161 per passenger.Departing Mon, 5 Apr.One-way flight with STARLUX Airlines.Outbound indirect flight with STARLUX Airlines, departs from Ontario International on Mon, 5 Apr, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs168,161, select.

Find the cheapest month to fly from Ontario International to Bangkok

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ontario International to Bangkok flights are currently cheapest in July.
Apr
from Rs132,560
May
from Rs133,193
Jun
from Rs158,841
Jul
from Rs119,895
Aug
from Rs125,517
Sep
from Rs130,469
Oct
from Rs125,517
Nov
from Rs130,886
Dec
from Rs135,031
Jan
from Rs135,031
Feb
from Rs135,244
Mar
from Rs134,148

Alternative Ontario International to Bangkok routes

Looking for the cheapest, fastest or easiest route from Ontario International to Bangkok? You could fly into the following airports instead.

Don Mueang

21km from central Bangkok
Closest
from Rs141,175
Search flights

Bangkok Suvarnabhumi

29km from central Bangkok
Cheapest
from Rs119,895
Search flights

Ontario to Bangkok: Flight information

The things to know before you go.
Cheapest flight foundRs119,895
Cheapest month to flyJuly

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

There are 2 airports in Bangkok: Don Mueang and Bangkok Suvarnabhumi.
The best price we found for a return flight from Ontario International to Bangkok is Rs236,177. 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. But we found flights with one or more stops from Rs236,177.
As of April 2026, there are no flights flying from Ontario International to Bangkok.
The cheapest month to fly from Ontario International to Bangkok is usually May.
If you're flying from Ontario International Airport, the cheapest airport near Bangkok is Bangkok Suvarnabhumi – which is 28.5 km away from the centre of Bangkok. We've found flights into this airport from Rs236,177.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Bangkok on Monday, 4 May 2026.
No airlines currently offer direct flights between Ontario International Airport and Bangkok. 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 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.
In April, the average temperature is usually around 31°C. April is typically the warmest month in Bangkok, when it usually averages around 35°C. You can expect the least rain in December. The coldest month is November, with temperatures averaging 22°C. The rainiest month is September.
Currently, Frontier Airlines offers the cheapest flight tickets to Bangkok.

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

  • Bangkok is 14 hours ahead of Ontario, where Ontario International Airport is located. Bangkok runs on the UTC+7 timezone.

  • To avoid rushing for your ONT to Bangkok flight, leave enough time to navigate the airport and find your gate. Arriving two hours ahead of international departures and one hour before domestic flights is the standard rule.

  • Heading away during a peak time like school or public holidays? Expect longer lines at check-in and security. Give yourself extra leeway and arrive up to four hours before international flights and two hours before domestic departures.

  • Stopovers offer the opportunity to discover a new place or just have a break during your trip. When searching for a flight ticket from ONT to Bangkok, uncheck 'Direct flights only' to check out all potential stops. Taiwan Taoyuan International Airport (TPE) is a top stop on this route.

  • The journey from central Ontario to ONT takes around 1 hour 30 minutes by public transport. If you ride-share, drive or grab a cab, you'll cover the 5 kilometres in 10 minutes or so, depending on traffic conditions.

  • Searching for a hotel near ONT? If you're boarding an early flight from Ontario International Airport to Bangkok, these stays will put you moments from your departure gate:

  • 83.6% of flights leaving Ontario International Airport reach their destination on time. With its dependable on-time performance, you're unlikely to be delayed when setting off from ONT.

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

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

  • The best price we've found for a one-way Ontario International Airport to Bangkok flight is Rs119,895. The cheapest price for a return flight is Rs236,177. Keep in mind fares may change due to availability at the time of booking.

  • Don't wait until the last moment. You're more likely to find cheap flights from ONT to Bangkok if you book in advance. Airlines often offer some fantastic early bird rates.

  • Scoring cheap tickets from Ontario International Airport to Bangkok is easier if you're flexible with your travel plans. Try using the 'Whole month' function to get the lowest fares across every month and score an incredible deal.

  • Never miss a deal on cheap flights from ONT to Bangkok by creating a Price Alert. You'll get an email or push notification on the app when a special offer becomes available.

  • Save money on your flight from Ontario International Airport to Bangkok with the help of our filters. Select your preferred departure time, duration and airlines, then sort the results by 'Cheapest' to see the best deals.

Airports in Bangkok

Suvarnabhumi Airport (BKK)

  • The distance from Suvarnabhumi Airport (BKK) to central Bangkok is roughly 32 kilometres. It takes around 35 minutes to reach the centre driving.

  • It takes around 1 hour 5 minutes if you're travelling by public transport.

  • If you have a late flight from Ontario International Airport to Bangkok, nothing beats the convenience of staying close to the terminal. Pick up your bags from the carousel and then be showered and sleeping soon after at one of these hotels 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.

  • Reserving your vehicle from Suvarnabhumi Airport around four weeks in advance of your flight from ONT to Bangkok can help you get the best possible rate.

Don Mueang International Airport (DMK)

  • The centre of Bangkok is located around 27 kilometres from Don Mueang International Airport (DMK). After your flight from Ontario International Airport to Bangkok has touched down and you've made your way through the terminal, expect a drive of around 30 minutes.

  • You can expect the trip to take about 1 hour 5 minutes on public transport.

  • There are some comfortable places to park your luggage (and yourself) near DMK. Kick back and get cosy after your ONT to Bangkok flight at one of these perfectly located options:

  • Forget about public transport schedules or slow-moving cab lines. Grab a Don Mueang International Airport rental car and take your journey in whatever direction you like. Compare availability and rates from Chic Car Rent, asap car hire and Hertz.

  • Score the best price by securing your ride from DMK three weeks in advance. You'll also have access to a greater selection of vehicles.

Best time to go to Bangkok

  • Visit Bangkok during peak season if you prefer a bustling atmosphere, but remember that hotel prices may be higher. Alternatively, book flights from Ontario International Airport to Bangkok during low season when prices are cheaper and it's less crowded.

  • The warmest month in Bangkok is April, with temperatures ranging between 26ºC and 37ºC. Lock in your Ontario International Airport to Bangkok flight ticket then if this is the type of weather you enjoy.

  • Look for cheap tickets from ONT to Bangkok in December if you like travelling in cooler conditions. Temperatures are at their lowest then, ranging between 19ºC and 33ºC on average.

More about Bangkok

Explore more of Thailand

  • You've done Bangkok, now it's time to discover other corners of Thailand. Travel around 467 kilometres north-east to Udon Thani to tick off its popular sights. From Nong Prajak Public Park to Krom Luang Prachaksinlapakhom Monument and Chinesisches Tor, you'll have a packed itinerary ahead.

  • If you're interested in discovering another great destination in Thailand, head for Nakhon Ratchasima, roughly 225 kilometres north-east of Bangkok. Art and Culture Centre, Vongchavalitkul University, Wat Pa Salwan (Burapha Chan Chedi) and บ้านสวนเกษตรอินทรีย์ (บ้านสวนในซอย) 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 45 days.