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

Delta is the most popular carrier operating from Ontario to Bangkok

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 28% 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.

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 November 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.

$356 Cheap Flights from Ontario to Bangkok in 2025/26

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Find the cheapest flights from Ontario to Bangkok

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

7:30 am - 12:55 amONT-BKK

26h 25m2 stops

12:55 am - 10:37 pmBKK-ONT

36h 42m2 stops

$731Korean Air

Find Deal

Sun, Feb 22 - Sat, Feb 28

1:53 pm - 11:25 amONT-BKK

30h 32m2 stops

7:00 am - 5:47 pmBKK-ONT

24h 47m2 stops

$734United Airlines

Find Deal

Sat, Jan 24 - Sat, May 16

11:50 pm - 9:50 amONT-BKK

20h 00m1 stop

1:20 pm - 6:00 pmBKK-ONT

18h 40m1 stop

$735China Airlines

Find Deal

Fri, Mar 20 - Fri, Apr 3

10:50 pm - 9:50 amONT-BKK

20h 00m1 stop

2:05 pm - 5:50 pmBKK-ONT

17h 45m1 stop

$736China Airlines

Find Deal

Wed, Mar 4 - Thu, Mar 19

6:00 am - 11:40 pmONT-BKK

27h 40m2 stops

11:30 pm - 5:16 pmBKK-ONT

31h 46m2 stops

$739Korean Air

Find Deal

Sat, Apr 4 - Sat, Apr 18

10:50 pm - 9:50 amONT-BKK

20h 00m1 stop

2:05 pm - 4:50 pmBKK-ONT

17h 45m1 stop

$740China Airlines

Find Deal

Mon, Jan 12 - Fri, Jan 30

6:00 am - 5:10 amONT-BKK

32h 10m2 stops

4:55 pm - 5:41 pmBKK-ONT

38h 46m2 stops

$742United Airlines

Find Deal

Mon, Feb 23 - Mon, Mar 16

6:00 am - 11:20 pmONT-BKK

26h 20m2 stops

9:30 pm - 5:13 pmBKK-ONT

33h 43m2 stops

$743Multiple Airlines

Find Deal

Mon, Mar 2 - Mon, Mar 16

7:30 am - 12:55 amONT-BKK

26h 25m2 stops

2:05 am - 1:54 pmBKK-ONT

26h 49m2 stops

$744Multiple Airlines

Find Deal

Thu, Feb 19 - Fri, Feb 27

3:30 pm - 12:45 amONT-BKK

42h 15m2 stops

12:55 am - 10:37 pmBKK-ONT

36h 42m2 stops

$745Delta

Find Deal

Sat, Feb 14 - Sat, Feb 28

China Airlines flights from Ontario to Bangkok

Our best China Airlines deals on Ontario to Bangkok flight tickets

China Airlines

Nov 30

ONT10:50 pmOntario

26h 55m

1 stop

BKK4:45 pmBangkok Suvarnabhumi

Dec 13

BKK2:35 amBangkok Suvarnabhumi

29h 15m

1 stop

ONT4:50 pmOntario

$733

Find similar

China Airlines

Mar 20

ONT11:50 pmOntario

20h 00m

1 stop

BKK9:50 amBangkok Suvarnabhumi

Apr 3

BKK1:20 pmBangkok Suvarnabhumi

18h 40m

1 stop

ONT6:00 pmOntario

$735

Find similar

China Airlines

Mar 4

ONT10:50 pmOntario

20h 00m

1 stop

BKK9:50 amBangkok Suvarnabhumi

Mar 19

BKK2:05 pmBangkok Suvarnabhumi

17h 45m

1 stop

ONT5:50 pmOntario

$736

Find similar

Korean Air flights from Ontario to Bangkok

Our best Korean Air deals on Ontario to Bangkok flight tickets

Korean Air

Feb 22

ONT7:30 amOntario

26h 25m

2 stops

BKK12:55 amBangkok Suvarnabhumi

Feb 28

BKK12:55 amBangkok Suvarnabhumi

36h 42m

2 stops

ONT10:37 pmOntario

$731

Find similar

Korean Air

Apr 4

ONT6:00 amOntario

27h 40m

2 stops

BKK11:40 pmBangkok Suvarnabhumi

Apr 13

BKK11:30 pmBangkok Suvarnabhumi

31h 46m

2 stops

ONT5:16 pmOntario

$739

Find similar

Korean Air

Mar 26

ONT6:00 amOntario

25h 30m

2 stops

BKK9:30 pmBangkok Suvarnabhumi

Jun 10

BKK2:35 amBangkok Suvarnabhumi

28h 41m

2 stops

ONT5:16 pmOntario

$759

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 2/22

7:30 am-12:55 am

2 stops26h 25m

Bangkok Suvarnabhumi

Sat 2/28

12:55 am-10:37 pm

2 stops36h 42m

$731

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 1/24

1:53 pm-11:25 am

2 stops30h 32m

Bangkok Suvarnabhumi

Sat 5/16

7:00 am-5:47 pm

2 stops24h 47m

$734

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Fri 3/20

11:50 pm-9:50 am

1 stop20h 00m

Bangkok Suvarnabhumi

Fri 4/3

1:20 pm-6:00 pm

1 stop18h 40m

$735

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 3/4

10:50 pm-9:50 am

1 stop20h 00m

Bangkok Suvarnabhumi

Thu 3/19

2:05 pm-5:50 pm

1 stop17h 45m

$736

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 4/4

6:00 am-11:40 pm

2 stops27h 40m

Bangkok Suvarnabhumi

Sat 4/18

11:30 pm-5:16 pm

2 stops31h 46m

$739

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 1/12

10:50 pm-9:50 am

1 stop20h 00m

Bangkok Suvarnabhumi

Fri 1/30

2:05 pm-4:50 pm

1 stop17h 45m

$740

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 2/23

6:00 am-5:10 am

2 stops32h 10m

Bangkok Suvarnabhumi

Mon 3/16

4:55 pm-5:41 pm

2 stops38h 46m

$742

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 3/2

6:00 am-11:20 pm

2 stops26h 20m

Bangkok Suvarnabhumi

Mon 3/16

9:30 pm-5:13 pm

2 stops33h 43m

$743

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 2/19

7:30 am-12:55 am

2 stops26h 25m

Bangkok Suvarnabhumi

Fri 2/27

2:05 am-1:54 pm

2 stops26h 49m

$744

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 2/14

3:30 pm-12:45 am

2 stops42h 15m

Bangkok Suvarnabhumi

Sat 2/28

12:55 am-10:37 pm

2 stops36h 42m

$745

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 cheapest month to fly to Bangkok?

If you aren’t able to travel during the month of October, then book flights to Bangkok from Ontario during September instead. Flights to Bangkok in September, while not as cheap as those in October, still average around $824.

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 Monday will generally be more expensive and average around $896. 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 $1,003 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 $762 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 19h 35m.
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 November 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 $732	Free Cancellation	Rating 8.4 1,170 reviews	Search Korean Air flights
China Airlines	PriceFrom $756	Free Cancellation	Rating 8.3 782 reviews	Search China Airlines flights
United Airlines	PriceFrom $778	Free Cancellation	Rating 7.4 9,046 reviews	Search United Airlines flights
STARLUX Airlines	PriceFrom $787	Free Cancellation	Rating 8.9 235 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.