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

Korean Air, Delta, and United 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 32% 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.

$362 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 - 10:45 pmONT Ontario-CNX Chiang Mai

24h 45m2 stops Seattle/Tacoma Intl Incheon Intl

12:20 am - 1:57 pmCNX Chiang Mai-ONT Ontario

28h 37m2 stops Incheon Intl Seattle/Tacoma Intl

$792Korean Air

Wed, Feb 10 - Thu, Feb 18

3:30 pm - 1:25 pmONT Ontario-BKK Bangkok Suvarnabhumi

30h 55m2 stops Seattle/Tacoma Intl Incheon Intl

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

36h 38m2 stops Incheon Intl Seattle/Tacoma Intl

$830Delta

Tue, Jan 12 - Sun, Feb 7

5:47 pm - 1:25 pmONT Ontario-BKK Bangkok Suvarnabhumi

29h 38m2 stops Seattle/Tacoma Intl Incheon Intl

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

26h 53m2 stops Incheon Intl Seattle/Tacoma Intl

$830Delta

Sun, Mar 14 - Tue, Mar 30

7:00 am - 1:25 pmONT Ontario-BKK Bangkok Suvarnabhumi

39h 25m2 stops Seattle/Tacoma Intl Incheon Intl

11:15 pm - 10:59 pmBKK Bangkok Suvarnabhumi-ONT Ontario

38h 44m2 stops Incheon Intl Seattle/Tacoma Intl

$850Korean Air

Sun, Dec 6 - Sun, Dec 13

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

28h 20m2 stops Denver Intl Tokyo Narita

9:10 am - 8:19 pmBKK Bangkok Suvarnabhumi-ONT Ontario

25h 09m2 stops Tokyo Haneda San Francisco

$888United Airlines

Wed, Feb 17 - Wed, Mar 17

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

$888United Airlines

Wed, Jan 13 - Wed, Feb 10

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

23h 50m1 stop Taipei City Taiwan Taoyuan Intl

2:50 pm - 3:55 pmBKK Bangkok Suvarnabhumi-ONT Ontario

16h 05m1 stop Taipei City Taiwan Taoyuan Intl

$950STARLUX Airlines

Mon, Feb 1 - Sat, Feb 13

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

$953STARLUX Airlines

Wed, Feb 3 - Thu, Feb 11

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

35h 45m1 stop Taipei City Taiwan Taoyuan Intl

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

18h 00m1 stop Taipei City Taiwan Taoyuan Intl

$987China Airlines

Thu, Mar 4 - Sat, Mar 13

10:50 pm - 9:50 amONT Ontario-BKK Bangkok Suvarnabhumi

20h 00m1 stop Taipei City Taiwan Taoyuan Intl

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

21h 10m1 stop Taipei City Taiwan Taoyuan Intl

$987China Airlines

Wed, Mar 3 - Fri, Mar 12

Cheap last minute flights

Enter your travel dates to find the best prices.

6:20 am - 10:45 pmONT Ontario-CNX Chiang Mai

26h 25m2 stops Seattle/Tacoma Intl Incheon Intl

12:20 am - 10:11 pmCNX Chiang Mai-ONT Ontario

36h 51m2 stops Incheon Intl Salt Lake City

$885Multiple Airlines

Sun, Oct 25 - Fri, Nov 6

4:17 pm - 11:30 amONT Ontario-BKK Bangkok Suvarnabhumi

29h 13m2 stops San Francisco Hong Kong Intl

9:10 am - 3:33 pmBKK Bangkok Suvarnabhumi-ONT Ontario

21h 23m2 stops Tokyo Haneda San Francisco

$905United Airlines

Mon, Oct 26 - Wed, Nov 4

4:17 pm - 11:30 amONT Ontario-BKK Bangkok Suvarnabhumi

29h 13m2 stops San Francisco Hong Kong Intl

9:10 am - 3:33 pmBKK Bangkok Suvarnabhumi-ONT Ontario

21h 23m2 stops Tokyo Haneda San Francisco

$905United Airlines

Mon, Oct 26 - Wed, Nov 4

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

39h 05m2 stops Seattle/Tacoma Intl Incheon Intl

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

37h 28m2 stops Incheon Intl Seattle/Tacoma Intl

$919Korean Air

Sun, Oct 25 - Sun, Mar 21

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

39h 05m2 stops Seattle/Tacoma Intl Incheon Intl

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

37h 28m2 stops Incheon Intl Seattle/Tacoma Intl

$920Korean Air

Sun, Oct 25 - Sun, Mar 21

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

39h 05m2 stops Seattle/Tacoma Intl Incheon Intl

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

37h 28m2 stops Incheon Intl Seattle/Tacoma Intl

$965Korean Air

Sun, Oct 25 - Sun, Mar 21

10:45 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

$968STARLUX Airlines

Mon, Oct 26 - Mon, Nov 2

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

$970STARLUX Airlines

Mon, Oct 26 - Thu, Nov 5

11:50 pm - 1:35 amONT Ontario-BKK Bangkok Suvarnabhumi

35h 45m1 stop Taipei City Taiwan Taoyuan Intl

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

18h 00m1 stop Taipei City Taiwan Taoyuan Intl

$1,000China Airlines

Sun, Oct 25 - Fri, Nov 13

11:50 pm - 4:45 pmONT Ontario-BKK Bangkok Suvarnabhumi

26h 55m1 stop Taipei City Taiwan Taoyuan Intl

5:50 pm - 5:05 pmBKK Bangkok Suvarnabhumi-ONT Ontario

38h 15m1 stop Taipei City Taiwan Taoyuan Intl

$1,000China Airlines

Tue, Oct 27 - Mon, Nov 2

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Delta flights from Ontario to Thailand

Our best Delta deals on Ontario to Thailand flight tickets

Delta

Jan 12

ONT3:30 pmOntario

30h 55m

2 stops

BKK1:25 pmBangkok Suvarnabhumi

Feb 7

BKK1:05 amBangkok Suvarnabhumi

36h 38m

2 stops

ONT10:43 pmOntario

$830

Delta

Feb 10

ONT7:00 amOntario

23h 30m

2 stops

BKK9:30 pmBangkok Suvarnabhumi

Feb 21

BKK11:15 pmBangkok Suvarnabhumi

29h 42m

2 stops

ONT1:57 pmOntario

$831

Delta

Jan 16

ONT7:00 amOntario

23h 30m

2 stops

BKK9:30 pmBangkok Suvarnabhumi

Feb 7

BKK1:05 amBangkok Suvarnabhumi

36h 38m

2 stops

ONT10:43 pmOntario

$836

STARLUX Airlines flights from Ontario to Thailand

Our best STARLUX Airlines deals on Ontario to Thailand flight tickets

STARLUX Airlines

Feb 1

ONT9:45 pmOntario

23h 50m

1 stop

BKK12:35 pmBangkok Suvarnabhumi

Feb 13

BKK2:50 pmBangkok Suvarnabhumi

16h 05m

1 stop

ONT3:55 pmOntario

$950

STARLUX Airlines

Feb 3

ONT9:45 pmOntario

23h 50m

1 stop

BKK12:35 pmBangkok Suvarnabhumi

Feb 11

BKK5:40 pmBangkok Suvarnabhumi

37h 15m

1 stop

ONT3:55 pmOntario

$953

STARLUX Airlines

Nov 28

ONT9:45 pmOntario

27h 45m

1 stop

BKK4:30 pmBangkok Suvarnabhumi

Dec 11

BKK1:45 pmBangkok Suvarnabhumi

17h 10m

1 stop

ONT3:55 pmOntario

$954

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Wed 2/10

7:00 am-10:45 pm

2 stops24h 45m

Chiang Mai

Thu 2/18

12:20 am-1:57 pm

2 stops28h 37m

$792

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 1/12

3:30 pm-1:25 pm

2 stops30h 55m

Bangkok Suvarnabhumi

Sun 2/7

1:05 am-10:43 pm

2 stops36h 38m

$830

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sun 3/14

5:47 pm-1:25 pm

2 stops29h 38m

Bangkok Suvarnabhumi

Tue 3/30

9:50 am-10:43 pm

2 stops26h 53m

$830

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sun 12/6

7:00 am-1:25 pm

2 stops39h 25m

Bangkok Suvarnabhumi

Sun 12/13

11:15 pm-10:59 pm

2 stops38h 44m

$850

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 2/17

5:00 am-12:20 am

2 stops28h 20m

Bangkok Suvarnabhumi

Wed 3/17

9:10 am-8:19 pm

2 stops25h 09m

$888

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 1/13

7:25 am-12:20 am

2 stops25h 55m

Bangkok Suvarnabhumi

Wed 2/10

9:10 am-5:35 pm

2 stops23h 25m

$888

Quickest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 2/1

9:45 pm-12:35 pm

1 stop23h 50m

Bangkok Suvarnabhumi

Sat 2/13

2:50 pm-3:55 pm

1 stop16h 05m

$950

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 2/3

9:45 pm-12:35 pm

1 stop23h 50m

Bangkok Suvarnabhumi

Thu 2/11

5:40 pm-3:55 pm

1 stop37h 15m

$953

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Thu 3/4

10:50 pm-1:35 am

1 stop35h 45m

Bangkok Suvarnabhumi

Sat 3/13

2:05 pm-5:05 pm

1 stop18h 00m

$987

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 3/3

10:50 pm-9:50 am

1 stop20h 00m

Bangkok Suvarnabhumi

Fri 3/12

10:55 am-5:05 pm

1 stop21h 10m

$987

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 $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 $971 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 $824 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	$362
Fastest flight time	20h 00m
Direct flights	None

The best one-way flight to Thailand from Ontario in the past 72 hours is $362. The best round-trip flight deal from Ontario to Thailand found on momondo in the last 72 hours is $792.

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 8,664 reviews	Search Delta flights
Korean Air	PriceFrom $455	Free Cancellation	Rating 8.4 1,218 reviews	Search Korean Air flights
China Airlines	PriceFrom $718	Free Cancellation	Rating 8.3 853 reviews	Search China Airlines flights
STARLUX Airlines	PriceFrom $731	Free Cancellation	Rating 8.7 400 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.