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

Korean Air, United Airlines, and China Airlines are the most popular carriers operating from Ontario to Thailand

What airlines fly to Thailand?

Singapore Airlines, Asiana Airlines and Cathay Pacific are the top three most popular airlines that fly to Thailand from Ontario according to our data. Singapore Airlines is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Thailand. Keep in mind that there are 24 different airlines that fly to Thailand 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 Thailand?

Prices for flights from Ontario Airport to Thailand refresh daily.

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

There are 4 operators available for flights from Ontario Airport to Thailand as of November 2026.

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

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 Thailand.

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

The travel and health documents you'll need for your trip to Thailand 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 Thailand. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$374 Cheap Flights from Ontario to Thailand in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Thailand

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 9:30 pmONT Ontario-BKK Bangkok Suvarnabhumi

23h 30m2 stops Seattle/Tacoma Intl Incheon Intl

1:05 am - 10:43 pmBKK Bangkok Suvarnabhumi-ONT Ontario

35h 38m2 stops Incheon Intl Seattle/Tacoma Intl

$759Korean Air

Wed, Mar 3 - Thu, Mar 25

7:00 am - 9:30 pmONT Ontario-BKK Bangkok Suvarnabhumi

24h 30m2 stops Seattle/Tacoma Intl Incheon Intl

9:50 am - 10:48 pmBKK Bangkok Suvarnabhumi-ONT Ontario

26h 58m2 stops Incheon Intl Seattle/Tacoma Intl

$786Korean Air

Fri, Mar 26 - Sat, Apr 3

7:00 am - 12:20 amONT Ontario-BKK Bangkok Suvarnabhumi

26h 20m2 stops Seattle/Tacoma Intl Incheon Intl

9:40 pm - 10:43 pmBKK Bangkok Suvarnabhumi-ONT Ontario

40h 03m2 stops Incheon Intl Seattle/Tacoma Intl

$792Delta

Thu, Feb 18 - Sat, Mar 6

7:00 am - 11:05 pmONT Ontario-BKK Bangkok Suvarnabhumi

25h 05m2 stops Seattle/Tacoma Intl Incheon Intl

9:50 am - 5:17 pmBKK Bangkok Suvarnabhumi-ONT Ontario

21h 27m2 stops Incheon Intl Seattle/Tacoma Intl

$792Delta

Wed, Mar 3 - Thu, Mar 25

7:00 am - 12:20 amONT Ontario-BKK Bangkok Suvarnabhumi

26h 20m2 stops Seattle/Tacoma Intl Incheon Intl

1:05 am - 2:50 pmBKK Bangkok Suvarnabhumi-ONT Ontario

28h 45m2 stops Incheon Intl Seattle/Tacoma Intl

$793Multiple Airlines

Mon, Jan 25 - Wed, Feb 3

7:06 pm - 11:05 amONT Ontario-BKK Bangkok Suvarnabhumi

24h 59m2 stops San Francisco Incheon Intl

12:25 pm - 11:23 pmBKK Bangkok Suvarnabhumi-ONT Ontario

25h 58m2 stops Incheon Intl San Francisco

$899Multiple Airlines

Thu, Dec 3 - Thu, Dec 10

10:50 pm - 4:45 pmONT Ontario-BKK Bangkok Suvarnabhumi

26h 55m1 stop Taipei City Taiwan Taoyuan Intl

2:05 pm - 6:05 pmBKK Bangkok Suvarnabhumi-ONT Ontario

18h 00m1 stop Taipei City Taiwan Taoyuan Intl

$924China Airlines

Wed, Mar 3 - Fri, Mar 26

12:10 am - 4:20 pmONT Ontario-BKK Bangkok Suvarnabhumi

26h 10m1 stop Taipei City Taiwan Taoyuan Intl

1:20 pm - 6:00 pmBKK Bangkok Suvarnabhumi-ONT Ontario

18h 40m1 stop Taipei City Taiwan Taoyuan Intl

$924China Airlines

Mon, May 3 - Thu, May 27

9:45 pm - 12:55 pmONT Ontario-BKK Bangkok Suvarnabhumi

24h 10m1 stop Taipei City Taiwan Taoyuan Intl

5:40 pm - 3:55 pmBKK Bangkok Suvarnabhumi-ONT Ontario

37h 15m1 stop Taipei City Taiwan Taoyuan Intl

$949STARLUX Airlines

Tue, Feb 16 - Sun, Feb 28

9:45 pm - 4:30 pmONT Ontario-BKK Bangkok Suvarnabhumi

27h 45m1 stop Taipei City Taiwan Taoyuan Intl

1:45 pm - 3:55 pmBKK Bangkok Suvarnabhumi-ONT Ontario

17h 10m1 stop Taipei City Taiwan Taoyuan Intl

$949STARLUX Airlines

Sat, Nov 28 - Fri, Dec 11

Cheap last minute flights

Enter your travel dates to find the best prices.

7:00 am - 11:05 pmONT Ontario-BKK Bangkok Suvarnabhumi

25h 05m2 stops Seattle/Tacoma Intl Incheon Intl

9:40 pm - 6:00 pmBKK Bangkok Suvarnabhumi-ONT Ontario

35h 20m2 stops Incheon Intl Seattle/Tacoma Intl

$933Korean Air

Mon, Nov 16 - Wed, Dec 23

1:35 pm - 11:30 amONT Ontario-BKK Bangkok Suvarnabhumi

54h 55m2 stops San Francisco Hong Kong Intl

7:10 am - 6:01 pmBKK Bangkok Suvarnabhumi-ONT Ontario

25h 51m2 stops Tokyo Narita San Francisco

$969United Airlines

Wed, Nov 11 - Wed, Nov 18

7:00 am - 9:30 pmONT Ontario-BKK Bangkok Suvarnabhumi

23h 30m2 stops Seattle/Tacoma Intl Incheon Intl

9:50 am - 9:43 pmBKK Bangkok Suvarnabhumi-ONT Ontario

26h 53m2 stops Incheon Intl Seattle/Tacoma Intl

$973Korean Air

Mon, Nov 16 - Sun, Mar 14

6:00 am - 11:30 amONT Ontario-BKK Bangkok Suvarnabhumi

38h 30m2 stops San Francisco Hong Kong Intl

7:10 am - 8:38 pmBKK Bangkok Suvarnabhumi-ONT Ontario

28h 28m2 stops Tokyo Narita San Francisco

$974United Airlines

Thu, Nov 12 - Fri, Dec 11

5:56 pm - 11:05 pmONT Ontario-BKK Bangkok Suvarnabhumi

38h 09m2 stops Seattle/Tacoma Intl Incheon Intl

9:40 pm - 10:59 pmBKK Bangkok Suvarnabhumi-ONT Ontario

40h 19m2 stops Incheon Intl Seattle/Tacoma Intl

$978Delta

Sun, Nov 15 - Fri, Dec 11

5:56 pm - 11:05 pmONT Ontario-BKK Bangkok Suvarnabhumi

38h 09m2 stops Seattle/Tacoma Intl Incheon Intl

9:40 pm - 10:59 pmBKK Bangkok Suvarnabhumi-ONT Ontario

40h 19m2 stops Incheon Intl Seattle/Tacoma Intl

$983Delta

Sun, Nov 15 - Fri, Dec 11

10:50 pm - 1:35 amONT Ontario-BKK Bangkok Suvarnabhumi

35h 45m1 stop Taipei City Taiwan Taoyuan Intl

10:55 am - 5:05 pmBKK Bangkok Suvarnabhumi-ONT Ontario

21h 10m1 stop Taipei City Taiwan Taoyuan Intl

$984China Airlines

Sat, Nov 14 - Tue, Feb 23

10:50 pm - 1:35 amONT Ontario-BKK Bangkok Suvarnabhumi

35h 45m1 stop Taipei City Taiwan Taoyuan Intl

10:55 am - 5:05 pmBKK Bangkok Suvarnabhumi-ONT Ontario

21h 10m1 stop Taipei City Taiwan Taoyuan Intl

$1,003China Airlines

Sat, Nov 14 - Tue, Feb 23

9:45 pm - 4:30 pmONT Ontario-BKK Bangkok Suvarnabhumi

27h 45m1 stop Taipei City Taiwan Taoyuan Intl

1:45 pm - 3:55 pmBKK Bangkok Suvarnabhumi-ONT Ontario

17h 10m1 stop Taipei City Taiwan Taoyuan Intl

$1,009STARLUX Airlines

Mon, Nov 16 - Wed, Dec 23

9:45 pm - 4:30 pmONT Ontario-BKK Bangkok Suvarnabhumi

27h 45m1 stop Taipei City Taiwan Taoyuan Intl

5:40 pm - 3:55 pmBKK Bangkok Suvarnabhumi-ONT Ontario

37h 15m1 stop Taipei City Taiwan Taoyuan Intl

$1,117STARLUX Airlines

Mon, Nov 16 - Mon, Dec 7

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China Airlines flights from Ontario to Thailand

Our best China Airlines deals on Ontario to Thailand flight tickets

China Airlines

Mar 3

ONT10:50 pmOntario

26h 55m

1 stop

BKK4:45 pmBangkok Suvarnabhumi

Mar 26

BKK2:05 pmBangkok Suvarnabhumi

18h 00m

1 stop

ONT6:05 pmOntario

$924

China Airlines

Nov 26

ONT10:50 pmOntario

20h 00m

1 stop

BKK9:50 amBangkok Suvarnabhumi

Dec 9

BKK10:55 amBangkok Suvarnabhumi

21h 10m

1 stop

ONT5:05 pmOntario

$931

China Airlines

Jan 5

ONT10:50 pmOntario

20h 00m

1 stop

BKK9:50 amBangkok Suvarnabhumi

Jan 26

BKK10:55 amBangkok Suvarnabhumi

21h 10m

1 stop

ONT5:05 pmOntario

$937

United Airlines flights from Ontario to Thailand

Our best United Airlines deals on Ontario to Thailand flight tickets

United Airlines

Jan 20

ONT7:25 amOntario

25h 55m

2 stops

BKK12:20 amBangkok Suvarnabhumi

Feb 10

BKK9:10 amBangkok Suvarnabhumi

23h 25m

2 stops

ONT5:35 pmOntario

$930

United Airlines

Jan 25

ONT7:25 amOntario

25h 55m

2 stops

BKK12:20 amBangkok Suvarnabhumi

Feb 8

BKK7:10 amBangkok Suvarnabhumi

23h 08m

2 stops

ONT3:18 pmOntario

$932

United Airlines

Feb 23

ONT7:45 amOntario

30h 25m

2 stops

BKK5:10 amBangkok Suvarnabhumi

Mar 25

BKK4:55 pmBangkok Suvarnabhumi

20h 04m

2 stops

ONT10:59 pmOntario

$945

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 3/3

7:00 am-9:30 pm

2 stops23h 30m

Bangkok Suvarnabhumi

Thu 3/25

1:05 am-10:43 pm

2 stops35h 38m

$759

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Fri 3/26

7:00 am-9:30 pm

2 stops24h 30m

Bangkok Suvarnabhumi

Sat 4/3

9:50 am-10:48 pm

2 stops26h 58m

$786

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Thu 2/18

7:00 am-12:20 am

2 stops26h 20m

Bangkok Suvarnabhumi

Sat 3/6

9:40 pm-10:43 pm

2 stops40h 03m

$792

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 3/3

7:00 am-11:05 pm

2 stops25h 05m

Bangkok Suvarnabhumi

Thu 3/25

9:50 am-5:17 pm

2 stops21h 27m

$792

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 1/25

7:00 am-12:20 am

2 stops26h 20m

Bangkok Suvarnabhumi

Wed 2/3

1:05 am-2:50 pm

2 stops28h 45m

$793

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Thu 12/3

7:06 pm-11:05 am

2 stops24h 59m

Bangkok Suvarnabhumi

Thu 12/10

12:25 pm-11:23 pm

2 stops25h 58m

$899

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 3/3

10:50 pm-4:45 pm

1 stop26h 55m

Bangkok Suvarnabhumi

Fri 3/26

2:05 pm-6:05 pm

1 stop18h 00m

$924

Quickest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 5/3

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

Thu 5/27

1:20 pm-6:00 pm

1 stop18h 40m

$924

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 2/16

9:45 pm-12:55 pm

1 stop24h 10m

Bangkok Suvarnabhumi

Sun 2/28

5:40 pm-3:55 pm

1 stop37h 15m

$949

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sat 11/28

9:45 pm-4:30 pm

1 stop27h 45m

Bangkok Suvarnabhumi

Fri 12/11

1:45 pm-3:55 pm

1 stop17h 10m

$949

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 Thailand

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 Thailand?

The month of January is, on average, the cheapest month to fly to Thailand from Ontario, with most prices found around $774. If you are unable to visit Thailand during the month of January, then departing from Ontario during the month March is also very affordable. Most momondo users find prices during this month for around $791.

How far in advance should I book a flight from Ontario to Thailand?

You are more likely to see cheaper flights to Thailand from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Thailand for around $957 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Thailand from Ontario for as low as $810 on momondo.

Can stopping save me money on Ontario to Thailand flights?

You could potentially save up to 19% on your flight if you consider stops on a Ontario to Thailand flight.

Cheap Ontario to Thailand flight deals and tips

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

Best Price Found	$374
Fastest flight time	19h 35m
Direct flights	None

The best one-way flight to Thailand from Ontario in the past 72 hours is $374. The best round-trip flight deal from Ontario to Thailand found on momondo in the last 72 hours is $759.

The fastest flight from Ontario to Thailand takes 19h 35m

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

Search flight deals

Frequently asked questions about flying from Ontario to Thailand

When did momondo last update prices for flights from Ontario Airport to Thailand?
Prices for flights from Ontario Airport to Thailand refresh daily.
How many operators does momondo search for flights from Ontario Airport to Thailand?
There are 4 operators available for flights from Ontario Airport to Thailand as of November 2026.
How old do you have to be to fly from Ontario Airport to Thailand?
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 Thailand.
What documentation or ID do you need to fly to Thailand?
The travel and health documents you'll need for your trip to Thailand 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 Thailand. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Ontario to Thailand

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $427	Free Cancellation	Rating 7.8 8,704 reviews	Search Delta flights
Korean Air	PriceFrom $455	Free Cancellation	Rating 8.4 1,218 reviews	Search Korean Air flights
China Airlines	PriceFrom $721	Free Cancellation	Rating 8.3 859 reviews	Search China Airlines flights
STARLUX Airlines	PriceFrom $731	Free Cancellation	Rating 8.8 415 reviews	Search STARLUX Airlines flights

Why use momondo?

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

It is quick and easy to find Ontario to Thailand flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Thailand that suits you.

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

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

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Thailand.

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

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