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 33% 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 October 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.

$351 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

36h 38m2 stops Incheon Intl Seattle/Tacoma Intl

$734Korean Air

Wed, Jan 20 - Mon, Feb 15

3:35 pm - 9:30 pmONT Ontario-BKK Bangkok Suvarnabhumi

38h 55m2 stops Seattle/Tacoma Intl Incheon Intl

9:50 am - 10:43 pmBKK Bangkok Suvarnabhumi-ONT Ontario

27h 53m2 stops Incheon Intl Seattle/Tacoma Intl

$734Korean Air

Wed, Jan 20 - Wed, Feb 17

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

25h 05m2 stops Seattle/Tacoma Intl Incheon Intl

1:05 am - 10:34 pmBKK Bangkok Suvarnabhumi-ONT Ontario

36h 29m2 stops Incheon Intl Seattle/Tacoma Intl

$780Delta

Mon, Jan 25 - Tue, Feb 2

6:00 am - 11:05 pmONT Ontario-BKK Bangkok Suvarnabhumi

26h 05m2 stops Salt Lake City Incheon Intl

11:15 pm - 10:43 pmBKK Bangkok Suvarnabhumi-ONT Ontario

38h 28m2 stops Incheon Intl Seattle/Tacoma Intl

$780Delta

Thu, Feb 25 - Sun, Mar 7

7:25 am - 12:20 amONT Ontario-BKK Bangkok Suvarnabhumi

25h 55m2 stops San Francisco Tokyo Narita

9:10 am - 5:35 pmBKK Bangkok Suvarnabhumi-ONT Ontario

23h 25m2 stops Tokyo Haneda San Francisco

$880United Airlines

Wed, Jan 13 - Wed, Feb 3

6:53 pm - 11:30 amONT Ontario-BKK Bangkok Suvarnabhumi

26h 37m2 stops San Francisco Hong Kong Intl

9:35 am - 8:07 pmBKK Bangkok Suvarnabhumi-ONT Ontario

24h 32m2 stops Tokyo Haneda San Francisco

$885United Airlines

Tue, Mar 23 - Tue, Apr 20

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

$923China Airlines

Mon, Jan 4 - Tue, Jan 19

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

26h 10m1 stop Taipei City Taiwan Taoyuan Intl

2:40 am - 6:00 pmBKK Bangkok Suvarnabhumi-ONT Ontario

29h 20m1 stop Taipei City Taiwan Taoyuan Intl

$925China Airlines

Thu, Apr 1 - Thu, Apr 29

9:45 pm - 12:35 pmONT Ontario-BKK Bangkok Suvarnabhumi

23h 50m1 stop Taipei City Taiwan Taoyuan Intl

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

37h 15m1 stop Taipei City Taiwan Taoyuan Intl

$946STARLUX Airlines

Mon, Jan 25 - Sun, Feb 14

9:45 pm - 12:35 pmONT Ontario-BKK Bangkok Suvarnabhumi

23h 50m1 stop Taipei City Taiwan Taoyuan Intl

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

37h 15m1 stop Taipei City Taiwan Taoyuan Intl

$947STARLUX Airlines

Mon, Jan 25 - Sun, Feb 14

Cheap last minute flights

Enter your travel dates to find the best prices.

6:00 pm - 12:20 amONT Ontario-BKK Bangkok Suvarnabhumi

39h 20m2 stops Seattle/Tacoma Intl Incheon Intl

9:40 pm - 11:00 pmBKK Bangkok Suvarnabhumi-ONT Ontario

40h 20m2 stops Incheon Intl Seattle/Tacoma Intl

$889Korean Air

Mon, Nov 2 - Mon, Nov 9

1:35 pm - 5:10 amONT Ontario-BKK Bangkok Suvarnabhumi

49h 35m2 stops San Francisco Tokyo Haneda

7:10 am - 8:15 pmBKK Bangkok Suvarnabhumi-ONT Ontario

28h 05m2 stops Tokyo Narita San Francisco

$899United Airlines

Sat, Oct 31 - Sun, Nov 8

5:00 am - 12:20 amONT Ontario-BKK Bangkok Suvarnabhumi

28h 20m2 stops Denver Intl Tokyo Narita

9:10 am - 5:56 pmBKK Bangkok Suvarnabhumi-ONT Ontario

23h 46m2 stops Tokyo Haneda San Francisco

$900United Airlines

Mon, Nov 2 - Mon, Nov 9

5:00 am - 12:20 amONT Ontario-BKK Bangkok Suvarnabhumi

28h 20m2 stops Denver Intl Tokyo Narita

9:10 am - 6:01 pmBKK Bangkok Suvarnabhumi-ONT Ontario

23h 51m2 stops Tokyo Haneda San Francisco

$900United Airlines

Tue, Nov 3 - Wed, Nov 18

10:45 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

$967STARLUX Airlines

Sat, Oct 31 - Sun, Nov 8

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

$969STARLUX Airlines

Mon, Nov 2 - Mon, Nov 9

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

26h 55m1 stop Taipei City Taiwan Taoyuan Intl

2:05 pm - 5:05 pmBKK Bangkok Suvarnabhumi-ONT Ontario

18h 00m1 stop Taipei City Taiwan Taoyuan Intl

$984China Airlines

Mon, Nov 2 - Wed, Nov 11

10:50 pm - 1:05 pmONT Ontario-BKK Bangkok Suvarnabhumi

23h 15m1 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

Thu, Nov 5 - Sun, Nov 8

6:00 pm - 10:45 pmONT Ontario-CNX Chiang Mai

37h 45m2 stops Seattle/Tacoma Intl Incheon Intl

9:40 pm - 5:12 pmCNX Chiang Mai-ONT Ontario

34h 32m2 stops Incheon Intl Seattle/Tacoma Intl

$1,334Korean Air

Mon, Nov 2 - Thu, Nov 5

6:00 pm - 10:45 pmONT Ontario-CNX Chiang Mai

37h 45m2 stops Seattle/Tacoma Intl Incheon Intl

9:40 pm - 5:12 pmCNX Chiang Mai-ONT Ontario

34h 32m2 stops Incheon Intl Seattle/Tacoma Intl

$1,335Korean Air

Mon, Nov 2 - Thu, Nov 5

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Delta flights from Ontario to Thailand

Our best Delta deals on Ontario to Thailand flight tickets

Delta

Feb 1

ONT7:00 amOntario

25h 05m

2 stops

BKK11:05 pmBangkok Suvarnabhumi

Feb 15

BKK11:15 pmBangkok Suvarnabhumi

31h 57m

2 stops

ONT4:12 pmOntario

$780

Delta

Jan 16

ONT3:31 pmOntario

41h 49m

2 stops

BKK12:20 amBangkok Suvarnabhumi

Feb 6

BKK11:15 pmBangkok Suvarnabhumi

39h 42m

2 stops

ONT11:57 pmOntario

$797

Delta

Feb 8

ONT7:00 amOntario

25h 05m

2 stops

BKK11:05 pmBangkok Suvarnabhumi

Apr 6

BKK9:50 amBangkok Suvarnabhumi

26h 53m

2 stops

ONT10:43 pmOntario

$830

United Airlines flights from Ontario to Thailand

Our best United Airlines deals on Ontario to Thailand flight tickets

United Airlines

Jan 13

ONT7:25 amOntario

25h 55m

2 stops

BKK12:20 amBangkok Suvarnabhumi

Feb 3

BKK9:10 amBangkok Suvarnabhumi

23h 25m

2 stops

ONT5:35 pmOntario

$880

United Airlines

Mar 23

ONT6:53 pmOntario

26h 37m

2 stops

BKK11:30 amBangkok Suvarnabhumi

Apr 20

BKK9:35 amBangkok Suvarnabhumi

24h 32m

2 stops

ONT8:07 pmOntario

$885

United Airlines

Feb 23

ONT7:45 amOntario

30h 25m

2 stops

BKK5:10 amBangkok Suvarnabhumi

Mar 16

BKK4:55 pmBangkok Suvarnabhumi

20h 04m

2 stops

ONT10:59 pmOntario

$895

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 1/20

7:00 am-9:30 pm

2 stops23h 30m

Bangkok Suvarnabhumi

Mon 2/15

1:05 am-10:43 pm

2 stops36h 38m

$734

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 1/20

3:35 pm-9:30 pm

2 stops38h 55m

Bangkok Suvarnabhumi

Wed 2/17

9:50 am-10:43 pm

2 stops27h 53m

$734

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 1/25

7:00 am-11:05 pm

2 stops25h 05m

Bangkok Suvarnabhumi

Tue 2/2

1:05 am-10:34 pm

2 stops36h 29m

$780

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Thu 2/25

6:00 am-11:05 pm

2 stops26h 05m

Bangkok Suvarnabhumi

Sun 3/7

11:15 pm-10:43 pm

2 stops38h 28m

$780

Quickest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 1/13

7:25 am-12:20 am

2 stops25h 55m

Bangkok Suvarnabhumi

Wed 2/3

9:10 am-5:35 pm

2 stops23h 25m

$880

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 3/23

6:53 pm-11:30 am

2 stops26h 37m

Bangkok Suvarnabhumi

Tue 4/20

9:35 am-8:07 pm

2 stops24h 32m

$885

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 1/4

10:50 pm-1:35 am

1 stop35h 45m

Bangkok Suvarnabhumi

Tue 1/19

10:55 am-5:05 pm

1 stop21h 10m

$923

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Thu 4/1

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

Thu 4/29

2:40 am-6:00 pm

1 stop29h 20m

$925

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 1/25

9:45 pm-12:35 pm

1 stop23h 50m

Bangkok Suvarnabhumi

Sun 2/14

5:40 pm-3:55 pm

1 stop37h 15m

$946

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 1/25

9:45 pm-12:35 pm

1 stop23h 50m

Bangkok Suvarnabhumi

Sun 2/14

5:40 pm-3:55 pm

1 stop37h 15m

$947

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 $770. 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 $789.

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 $953 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 $820 on momondo.

Can stopping save me money on Ontario to Thailand flights?

You could potentially save up to 8% 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	$351
Fastest flight time	20h 00m
Direct flights	None

The best one-way flight to Thailand from Ontario in the past 72 hours is $351. The best round-trip flight deal from Ontario to Thailand found on momondo in the last 72 hours is $734.

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

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 October 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 8,691 reviews	Search Delta flights
Korean Air	PriceFrom $455	Free Cancellation	Rating 8.4 1,219 reviews	Search Korean Air flights
China Airlines	PriceFrom $718	Free Cancellation	Rating 8.3 854 reviews	Search China Airlines flights
STARLUX Airlines	PriceFrom $731	Free Cancellation	Rating 8.8 405 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.