What airlines fly to Bangkok?

Singapore Airlines, Asiana Airlines and Cathay Pacific are the top three most popular airlines that fly to Bangkok from Ontario according to our data. Singapore Airlines is the first choice among our users, with 29% of people opting to fly with this airline when traveling to Bangkok. Keep in mind that there are 24 different airlines that fly to Bangkok on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Ontario to Bangkok?

Delta is the most popular carrier operating from Ontario to Bangkok

When did momondo last update prices for flights from Ontario Airport to Bangkok?

Prices for flights from Ontario Airport to Bangkok refresh daily.

How many operators does momondo search for flights from Ontario Airport to Bangkok?

There are 3 operators available for flights from Ontario Airport to Bangkok as of December 2025.

How old do you have to be to fly from Ontario Airport to Bangkok?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to Bangkok.

What documentation or ID do you need to fly to Bangkok?

The travel and health documents you'll need for your trip to Bangkok may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Bangkok. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$293 Cheap Flights from Ontario to Bangkok in 2025/26

Q: What is the typical price of a round-trip flight between Ontario and Bangkok?

Prices are currently low for flights on this route. Typical prices usually range from $1,072 to $1,750. The lowest price recently found on this route was $723.

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Find the cheapest flights from Ontario to Bangkok

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:54 pm - 4:35 am

ONT

BKK

43h 41m2 stops

9:35 am - 10:52 pm

BKK

ONT

27h 17m2 stops

$723United Airlines

Wed, May 6 - Wed, May 13

12:10 am - 9:45 am

ONT

BKK

19h 35m1 stop

1:20 pm - 6:00 pm

BKK

ONT

18h 40m1 stop

$725China Airlines

Tue, Apr 14 - Fri, May 1

6:10 am - 5:10 am

ONT

BKK

32h 00m2 stops

7:10 am - 12:47 pm

BKK

ONT

20h 37m2 stops

$726United Airlines

Thu, Feb 19 - Sat, Feb 28

5:05 am - 12:20 am

ONT

BKK

28h 15m2 stops

7:10 am - 5:41 pm

BKK

ONT

25h 31m2 stops

$729United Airlines

Wed, Feb 11 - Tue, Mar 3

6:39 pm - 5:10 am

ONT

BKK

43h 31m2 stops

7:10 am - 5:51 pm

BKK

ONT

25h 41m2 stops

$732United Airlines

Thu, Jan 1 - Sat, Jan 10

7:30 am - 12:45 am

ONT

BKK

26h 15m2 stops

9:40 am - 10:44 pm

BKK

ONT

28h 04m2 stops

$734Delta

Fri, Jan 16 - Thu, Feb 5

6:00 am - 11:40 pm

ONT

BKK

27h 40m2 stops

9:40 pm - 5:16 pm

BKK

ONT

33h 36m2 stops

$739Delta

Sun, Mar 29 - Sun, Apr 12

6:00 am - 11:20 pm

ONT

BKK

27h 20m2 stops

11:30 pm - 5:13 pm

BKK

ONT

31h 43m2 stops

$740Korean Air

Thu, Mar 12 - Sun, Apr 5

12:10 am - 7:30 pm

ONT

DMK

29h 20m1 stop

6:15 am - 6:00 pm

DMK

ONT

25h 45m1 stop

$990Multiple Airlines

Sat, Mar 28 - Thu, Apr 9

12:10 am - 3:50 pm

ONT

DMK

25h 40m2 stops

6:30 am - 6:00 pm

DMK

ONT

25h 30m2 stops

$1,029Multiple Airlines

Mon, Apr 6 - Thu, Apr 16

United Airlines flights from Ontario to Bangkok

Our best United Airlines deals on Ontario to Bangkok flight tickets

United Airlines

May 6

ONT6:54 pmOntario

43h 41m

2 stops

BKK4:35 amBangkok Suvarnabhumi

May 13

BKK9:35 amBangkok Suvarnabhumi

27h 17m

2 stops

ONT10:52 pmOntario

$723

Find similar

United Airlines

Feb 19

ONT6:10 amOntario

32h 00m

2 stops

BKK5:10 amBangkok Suvarnabhumi

Feb 28

BKK7:10 amBangkok Suvarnabhumi

20h 37m

2 stops

ONT12:47 pmOntario

$726

Find similar

United Airlines

Feb 11

ONT5:05 amOntario

28h 15m

2 stops

BKK12:20 amBangkok Suvarnabhumi

Mar 3

BKK7:10 amBangkok Suvarnabhumi

25h 31m

2 stops

ONT5:41 pmOntario

$729

Find similar

China Airlines flights from Ontario to Bangkok

Our best China Airlines deals on Ontario to Bangkok flight tickets

China Airlines

Apr 14

ONT12:10 amOntario

19h 35m

1 stop

BKK9:45 amBangkok Suvarnabhumi

May 1

BKK1:20 pmBangkok Suvarnabhumi

18h 40m

1 stop

ONT6:00 pmOntario

$725

Find similar

China Airlines

Mar 5

ONT10:50 pmOntario

26h 55m

1 stop

BKK4:45 pmBangkok Suvarnabhumi

Mar 10

BKK10:55 amBangkok Suvarnabhumi

20h 55m

1 stop

ONT5:50 pmOntario

$744

Find similar

China Airlines

Mar 8

ONT11:50 pmOntario

35h 45m

1 stop

BKK1:35 amBangkok Suvarnabhumi

Mar 17

BKK2:35 amBangkok Suvarnabhumi

29h 15m

1 stop

ONT5:50 pmOntario

$746

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 5/6

6:54 pm-4:35 am

2 stops43h 41m

Bangkok Suvarnabhumi

Wed 5/13

9:35 am-10:52 pm

2 stops27h 17m

$723

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 4/14

12:10 am-9:45 am

1 stop19h 35m

Bangkok Suvarnabhumi

Fri 5/1

1:20 pm-6:00 pm

1 stop18h 40m

$725

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 2/19

6:10 am-5:10 am

2 stops32h 00m

Bangkok Suvarnabhumi

Sat 2/28

7:10 am-12:47 pm

2 stops20h 37m

$726

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 2/11

5:05 am-12:20 am

2 stops28h 15m

Bangkok Suvarnabhumi

Tue 3/3

7:10 am-5:41 pm

2 stops25h 31m

$729

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 1/1

6:39 pm-5:10 am

2 stops43h 31m

Bangkok Suvarnabhumi

Sat 1/10

7:10 am-5:51 pm

2 stops25h 41m

$732

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Fri 1/16

7:30 am-12:45 am

2 stops26h 15m

Bangkok Suvarnabhumi

Thu 2/5

9:40 am-10:44 pm

2 stops28h 04m

$734

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 3/29

6:00 am-11:40 pm

2 stops27h 40m

Bangkok Suvarnabhumi

Sun 4/12

9:40 pm-5:16 pm

2 stops33h 36m

$739

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 3/12

6:00 am-11:20 pm

2 stops27h 20m

Bangkok Suvarnabhumi

Sun 4/5

11:30 pm-5:13 pm

2 stops31h 43m

$740

OntarioBangkok

ONT - DMK

ONTDMK

Ontario

Sat 3/28

12:10 am-7:30 pm

1 stop29h 20m

Bangkok Don Mueang Intl

Thu 4/9

6:15 am-6:00 pm

1 stop25h 45m

$990

OntarioBangkok

ONT - DMK

ONTDMK

Ontario

Mon 4/6

12:10 am-3:50 pm

2 stops25h 40m

Bangkok Don Mueang Intl

Thu 4/16

6:30 am-6:00 pm

2 stops25h 30m

$1,029

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Bangkok

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the typical price of a round-trip flight between Ontario and Bangkok?

What is the cheapest month to fly to Bangkok?

If you aren’t able to travel during the month of January, then book flights to Bangkok from Ontario during October instead. Flights to Bangkok in October, while not as cheap as those in January, still average around $808.

What is the cheapest day to depart on your flight to Bangkok?

On average, the least expensive day to fly to Bangkok from Ontario is on a Sunday. momondo users have found tickets for Sunday departures for as low as $699. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Ontario to Bangkok on a Wednesday will generally be more expensive and average around $905. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Bangkok?

According to our data, the cheapest time of day to fly to Bangkok is in the evening. momondo users have found flights departing from Ontario to Bangkok in the evening for as low as $741. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets at noon because they tend to be around $922. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

You are more likely to see cheaper flights to Bangkok from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Bangkok for around $989 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bangkok from Ontario for as low as $826 on momondo.

Cheap Ontario to Bangkok flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Bangkok

Fastest flight time	20h 00m
Direct flights	None

The fastest flight from Ontario to Bangkok takes 20h 00m

There are no direct flights from Ontario to Bangkok. There are no popular flight routes from Ontario to Bangkok.

Search flight deals

How far is Ontario to Bangkok by plane?
A flight from Ontario to Bangkok will travel around 8282.1 mi. In terms of flight time, this usually takes a little over 20h 00m.
When did momondo last update prices for flights from Ontario Airport to Bangkok?
Prices for flights from Ontario Airport to Bangkok refresh daily.
How many operators does momondo search for flights from Ontario Airport to Bangkok?
There are 3 operators available for flights from Ontario Airport to Bangkok as of December 2025.
How old do you have to be to fly from Ontario Airport to Bangkok?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to Bangkok.
What documentation or ID do you need to fly to Bangkok?
The travel and health documents you'll need for your trip to Bangkok may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Bangkok. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Ontario to Bangkok

Compare and see reviews for airlines that fly from Ontario to Bangkok with momondo

Airline	Rating	Free Cancellation	Price
Korean Air	PriceFrom $637	Free Cancellation	Rating 8.4 1,186 reviews	Search Korean Air flights
China Airlines	PriceFrom $722	Free Cancellation	Rating 8.3 792 reviews	Search China Airlines flights
STARLUX Airlines	PriceFrom $763	Free Cancellation	Rating 8.9 245 reviews	Search STARLUX Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Bangkok?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Bangkok for you.

Can I find flights from Ontario to Bangkok with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Bangkok from Ontario with this policy.

How can momondo help me find flights from Ontario to Bangkok?

Once all potential Ontario to Bangkok flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to Bangkok right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Ontario to Bangkok now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Bangkok and let you know when they change.