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

Compare Bangkok Suvarnabhumi to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

Book the best Ontario International fare with no extra fees

Flight deals from Bangkok Suvarnabhumi Airport to Ontario International Airport

Looking for a cheap last-minute deal or the best return flight from Bangkok Suvarnabhumi Airport to Ontario International Airport? If you want to travel next month, return fares start from $1,110. Find the lowest prices on one-way and return tickets right here.
Ontario.$1,090 per passenger.Departing Tue, 28 Apr, returning Fri, 17 Jul.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Tue, 28 Apr, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Fri, 17 Jul, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From $1,090, select.
Ontario.$1,092 per passenger.Departing Fri, 1 May, returning Fri, 17 Jul.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Fri, 1 May, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Fri, 17 Jul, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From $1,092, select.
Ontario.$1,102 per passenger.Departing Wed, 4 Nov, returning Wed, 18 Nov.Return flight with STARLUX Airlines.Outbound indirect flight with STARLUX Airlines, departs from Bangkok Suvarnabhumi on Wed, 4 Nov, arriving in Ontario International.Inbound indirect flight with STARLUX Airlines, departs from Ontario International on Wed, 18 Nov, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From $1,102, select.
Ontario.$1,105 per passenger.Departing Wed, 23 Sep, returning Wed, 30 Sep.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Wed, 23 Sep, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Wed, 30 Sep, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From $1,105, select.
Ontario.$1,107 per passenger.Departing Thu, 1 Oct, returning Wed, 14 Oct.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Thu, 1 Oct, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Wed, 14 Oct, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From $1,107, select.
Ontario.$1,107 per passenger.Departing Mon, 4 May, returning Thu, 10 Sep.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Mon, 4 May, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Thu, 10 Sep, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From $1,107, select.
Ontario.$1,110 per passenger.Departing Thu, 23 Apr, returning Thu, 30 Apr.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Thu, 23 Apr, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Thu, 30 Apr, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From $1,110, select.
Ontario.$1,110 per passenger.Departing Mon, 22 Jun, returning Wed, 15 Jul.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Mon, 22 Jun, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Wed, 15 Jul, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From $1,110, select.
Ontario.$1,110 per passenger.Departing Mon, 4 May, returning Sun, 4 Oct.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Mon, 4 May, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Sun, 4 Oct, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From $1,110, select.
Ontario.$1,110 per passenger.Departing Thu, 22 Oct, returning Sun, 1 Nov.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Thu, 22 Oct, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Sun, 1 Nov, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From $1,110, select.
Ontario.$1,110 per passenger.Departing Mon, 1 Jun, returning Tue, 30 Jun.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Mon, 1 Jun, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Tue, 30 Jun, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From $1,110, select.
Ontario.$1,110 per passenger.Departing Wed, 3 Jun, returning Mon, 24 Aug.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Wed, 3 Jun, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Mon, 24 Aug, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From $1,110, select.
Ontario.$1,110 per passenger.Departing Fri, 1 May, returning Sun, 10 May.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Fri, 1 May, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Sun, 10 May, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From $1,110, select.
Ontario.$1,110 per passenger.Departing Sat, 19 Sep, returning Sat, 3 Oct.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Sat, 19 Sep, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Sat, 3 Oct, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From $1,110, select.
Ontario.$1,110 per passenger.Departing Tue, 21 Apr, returning Sun, 10 May.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Tue, 21 Apr, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Sun, 10 May, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From $1,110, select.
Ontario.$1,112 per passenger.Departing Thu, 21 May, returning Tue, 25 Aug.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Thu, 21 May, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Tue, 25 Aug, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From $1,112, select.

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

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Bangkok Suvarnabhumi to Ontario International flights are currently cheapest in November.
Mar
from $1,254
Apr
from $1,110
May
from $1,110
Jun
from $1,110
Jul
from $1,235
Aug
from $1,226
Sep
from $1,105
Oct
from $1,107
Nov
from $1,102
Dec
from $1,123
Jan
from $1,627
Feb
from $1,122

Bangkok Suvarnabhumi to Ontario International: Alternative routes

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

Ontario International

4km from central Ontario
Closest
from $1,090
Search flights

San Bernardino Norton AFB

39km from central Ontario
Search flights

Santa Ana John Wayne

48km from central Ontario
from $1,333
Search flights

Long Beach Municipal

54km from central Ontario
from $7,698
Search flights

Hawthorne

65km from central Ontario
Search flights

Burbank

67km from central Ontario
from $1,800
Search flights

Los Angeles International

71km from central Ontario
Cheapest
from $773
Search flights

Bangkok to Ontario: Flight information

The things to know before you go.
Cheapest flight found$1,090
Cheapest month to flyApril

Check out these Ontario hotels

Ready to plan your stay? Other travellers rate these Ontario hotels for cleanliness, service and location.
Studio 6 Ontario CA Convention Center Airport
3.53 km from city centre
$106
Per night
Best Western Ontario
8.72 km from city centre
$176
Per night
Element Ontario Rancho Cucamonga
7.89 km from city centre
$290
Per night
Studio 6 Ontario CA Convention Center Airport
3.53 km from city centre
$106
Per night
Best Western Ontario
8.72 km from city centre
$176
Per night
Element Ontario Rancho Cucamonga
7.89 km from city centre
$290
Per night
Explore top-rated hotels

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

The best price we found for a return flight from Bangkok Suvarnabhumi to Ontario International is $1,090. 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 Bangkok Suvarnabhumi to Ontario International. But we found flights with one or more stops from $1,090.
As of March 2026, there are no flights flying from Bangkok Suvarnabhumi to Ontario International.
The cheapest month to fly from Bangkok Suvarnabhumi to Ontario International is usually April.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Bangkok Suvarnabhumi Airport to Ontario International Airport on Tuesday, 28 April 2026.
No airlines currently offer direct flights between Bangkok Suvarnabhumi Airport and Ontario International 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 Ontario International 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 Ontario is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, China Airlines offers the cheapest flight tickets to Ontario International.

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

  • Ontario is 14 hours behind Bangkok and follows the UTC-7 timezone.

  • To ensure you get on your BKK to ONT flight, leave enough time to check in and drop off your luggage. Arriving two hours before international departures and one hour before domestic flights is the general travel rule.

  • During popular months such as July, it's a good idea to get to the airport well in advance. Arrive two hours before domestic departures and four hours ahead of international flights whenever you're travelling during a high season in general.

  • If you want to check out another city along the way, look for a flight with a stopover. To see your options for tickets from Suvarnabhumi Airport to Ontario International Airport, deselect 'Direct flights only.' Taiwan Taoyuan International Airport is a sought-after stop between BKK and ONT.

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

  • $674 is the lowest price for a one-way Suvarnabhumi Airport to Ontario International Airport flight. A return flight starts at $1,090. These fares may change depending on demand and availability.

  • To pick up cheap tickets from BKK to ONT, book early. Airlines typically offer lower fares when flights are first made available.

  • The 'Whole month' search tool shows you the cheapest flights from Suvarnabhumi Airport to Ontario International Airport throughout the month. It's a great way to snap up a bargain if your travel dates aren't set in stone.

  • Picking up cheap flights from BKK to ONT is a piece of cake with Price Alerts. Simply create one of these automatic alerts and we'll let you know as soon as fares go down.

  • Secure the perfect flight for you with the help of the filters. To see the 'Best,' 'Fastest' or 'Cheapest' flights from Suvarnabhumi Airport to Ontario International Airport, use the 'Sort by' tool. You can also filter by airline, departure and arrival times, and journey duration.

Handy information about Suvarnabhumi Airport (BKK)

  • When it comes to the on-time performance of Suvarnabhumi Airport, data shows 67.87% of flights arrive within the expected timeframe.

  • To get to Suvarnabhumi Airport from central Bangkok, it takes about 35 minutes if you're travelling by car. This depends on traffic though. It's approximately 32 kilometres from the airport to the city centre.

  • Expect a trip time of about 1 hour 5 minutes when using public transport.

  • Get your journey off to a hassle-free start by staying near BKK. Whether you're boarding an early flight from Suvarnabhumi Airport to Ontario International Airport or just don't like being rushed, these stays have you covered:

Arriving at Ontario International Airport (ONT)

Getting from Ontario International Airport (ONT) to central Ontario

  • You'll find ONT at 2900 E. Airport Drive.

  • Ontario International Airport to the centre of Ontario has a drive time of about 10 minutes. It's approximately 6 kilometres away.

  • When travelling by public transport, expect a journey time of roughly 1 hour 30 minutes.

When to fly to Ontario International Airport (ONT)

  • It's time to work out your dates for your flight from Suvarnabhumi Airport to Ontario International Airport. August is the most popular month to visit Ontario. If you prefer a more laid-back vibe, go in May.

  • When booking your flight from Suvarnabhumi Airport to Ontario International Airport, think about the kind of weather you enjoy. August is the warmest month in Ontario, with the temperature ranging from 15ºC (59ºF) to 35ºC (95ºF).

  • Look for cheap tickets from BKK to ONT in January if you'd rather travel during cooler conditions. Temperatures are at their lowest around then, ranging between 4ºC (39ºF) and 23ºC (73ºF) on average.

Explore more of United States

  • You've visited Ontario, now it's time to explore other parts of United States. Journey around 56 kilometres west to Los Angeles to check off its top sights. From Griffith Observatory to The Broad and La Brea Tar Pits & Museum, you'll have a full itinerary ahead.

  • If there's time to check out another major destination in United States, consider San Diego, about 153 kilometres south of Ontario. San Diego Zoo, USS Midway Museum and SeaWorld San Diego are among its highlights.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.