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

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

What airlines fly to Thailand?

Singapore Airlines, Asiana Airlines and China Airlines 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 September 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.

$396 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

47h 30m2 stops Seattle/Tacoma Intl Incheon Intl

1:05 am - 10:59 pmBKK Bangkok Suvarnabhumi-ONT Ontario

36h 54m2 stops Incheon Intl Seattle/Tacoma Intl

$704Korean Air

Thu, Nov 26 - Mon, Nov 30

7:00 am - 10:45 pmONT Ontario-CNX Chiang Mai

24h 45m2 stops Seattle/Tacoma Intl Incheon Intl

12:20 am - 11:00 pmCNX Chiang Mai-ONT Ontario

37h 40m2 stops Incheon Intl Seattle/Tacoma Intl

$705Korean Air

Thu, Nov 12 - Wed, Nov 18

6:00 am - 9:30 pmONT Ontario-BKK Bangkok Suvarnabhumi

24h 30m2 stops Salt Lake City Incheon Intl

9:50 am - 4:58 pmBKK Bangkok Suvarnabhumi-ONT Ontario

22h 08m2 stops Incheon Intl Seattle/Tacoma Intl

$752Delta

Sun, Nov 29 - Sat, Dec 26

6:00 am - 9:30 pmONT Ontario-BKK Bangkok Suvarnabhumi

24h 30m2 stops Salt Lake City Incheon Intl

9:50 am - 4:12 pmBKK Bangkok Suvarnabhumi-ONT Ontario

21h 22m2 stops Incheon Intl Salt Lake City

$752Delta

Mon, Feb 1 - Tue, Feb 16

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

25h 05m2 stops Seattle/Tacoma Intl Incheon Intl

11:15 pm - 4:58 pmBKK Bangkok Suvarnabhumi-ONT Ontario

32h 43m2 stops Incheon Intl Seattle/Tacoma Intl

$807Multiple Airlines

Tue, Nov 24 - Tue, Dec 22

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

23h 15m1 stop Taipei City Taiwan Taoyuan Intl

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

18h 00m1 stop Taipei City Taiwan Taoyuan Intl

$811China Airlines

Mon, Mar 8 - Fri, Mar 19

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

23h 15m1 stop Taipei City Taiwan Taoyuan Intl

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

18h 00m1 stop Taipei City Taiwan Taoyuan Intl

$811China Airlines

Mon, Mar 8 - Fri, Mar 19

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

$868STARLUX Airlines

Sat, Jan 23 - Sun, Jan 31

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

27h 45m1 stop Taipei City Taiwan Taoyuan Intl

2:50 pm - 4:55 pmBKK Bangkok Suvarnabhumi-ONT Ontario

16h 05m1 stop Taipei City Taiwan Taoyuan Intl

$868STARLUX Airlines

Fri, Mar 5 - Sat, Mar 20

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

26h 05m2 stops Salt Lake City Incheon Intl

11:15 pm - 4:22 pmBKK Bangkok Suvarnabhumi-ONT Ontario

32h 07m2 stops Incheon Intl Salt Lake City

$877Multiple Airlines

Tue, Dec 1 - Sun, Dec 6

Cheap last minute flights

Enter your travel dates to find the best prices.

5:15 pm - 1:05 amONT Ontario-BKK Bangkok Suvarnabhumi

41h 50m2 stops Salt Lake City Incheon Intl

9:40 pm - 5:15 pmBKK Bangkok Suvarnabhumi-ONT Ontario

34h 35m2 stops Incheon Intl Seattle/Tacoma Intl

$807Delta

Thu, Oct 1 - Tue, Dec 15

6:00 am - 11:35 pmONT Ontario-BKK Bangkok Suvarnabhumi

27h 35m2 stops Seattle/Tacoma Intl Incheon Intl

9:50 am - 5:12 pmBKK Bangkok Suvarnabhumi-ONT Ontario

45h 22m2 stops Incheon Intl Seattle/Tacoma Intl

$828Korean Air

Mon, Sep 28 - Mon, Oct 5

6:00 am - 9:45 pmONT Ontario-BKK Bangkok Suvarnabhumi

25h 45m2 stops Seattle/Tacoma Intl Incheon Intl

9:50 am - 5:12 pmBKK Bangkok Suvarnabhumi-ONT Ontario

45h 22m2 stops Incheon Intl Seattle/Tacoma Intl

$828Korean Air

Wed, Sep 30 - Tue, Oct 6

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

22h 00m1 stop Taipei City Taiwan Taoyuan Intl

10:50 am - 6:00 pmBKK Bangkok Suvarnabhumi-ONT Ontario

21h 10m1 stop Taipei City Taiwan Taoyuan Intl

$836China Airlines

Sun, Sep 27 - Wed, Sep 30

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

26h 10m1 stop Taipei City Taiwan Taoyuan Intl

10:50 am - 6:00 pmBKK Bangkok Suvarnabhumi-ONT Ontario

21h 10m1 stop Taipei City Taiwan Taoyuan Intl

$837China Airlines

Mon, Sep 28 - Thu, Oct 1

6:00 pm - 1:05 amONT Ontario-BKK Bangkok Suvarnabhumi

41h 05m2 stops Seattle/Tacoma Intl Incheon Intl

11:30 pm - 5:12 pmBKK Bangkok Suvarnabhumi-ONT Ontario

31h 42m2 stops Incheon Intl Seattle/Tacoma Intl

$840Delta

Fri, Oct 2 - Tue, Oct 6

11:30 pm - 12:00 pmONT Ontario-BKK Bangkok Suvarnabhumi

22h 30m1 stop Taipei City Taiwan Taoyuan Intl

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

37h 15m1 stop Taipei City Taiwan Taoyuan Intl

$869STARLUX Airlines

Sat, Oct 3 - Tue, Oct 6

11:30 pm - 4:40 pmONT Ontario-BKK Bangkok Suvarnabhumi

27h 10m1 stop Taipei City Taiwan Taoyuan Intl

1:10 pm - 5:05 pmBKK Bangkok Suvarnabhumi-ONT Ontario

17h 55m1 stop Taipei City Taiwan Taoyuan Intl

$872STARLUX Airlines

Mon, Sep 28 - Wed, Oct 7

4:03 pm - 9:35 amONT Ontario-BKK Bangkok Suvarnabhumi

27h 32m2 stops San Francisco Hong Kong Intl

9:35 am - 3:22 pmBKK Bangkok Suvarnabhumi-ONT Ontario

43h 47m2 stops Tokyo Haneda San Francisco

$936United Airlines

Thu, Oct 1 - Tue, Oct 6

4:03 pm - 9:35 amONT Ontario-BKK Bangkok Suvarnabhumi

27h 32m2 stops San Francisco Hong Kong Intl

9:35 am - 3:22 pmBKK Bangkok Suvarnabhumi-ONT Ontario

43h 47m2 stops Tokyo Haneda San Francisco

$936United Airlines

Thu, Oct 1 - Sun, Oct 4

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Korean Air flights from Ontario to Thailand

Our best Korean Air deals on Ontario to Thailand flight tickets

Korean Air

Nov 26

ONT7:00 amOntario

47h 30m

2 stops

BKK9:30 pmBangkok Suvarnabhumi

Nov 30

BKK1:05 amBangkok Suvarnabhumi

36h 54m

2 stops

ONT10:59 pmOntario

$704

Korean Air

Nov 12

ONT7:00 amOntario

24h 45m

2 stops

CNX10:45 pmChiang Mai

Nov 18

CNX12:20 amChiang Mai

37h 40m

2 stops

ONT11:00 pmOntario

$705

Korean Air

Nov 10

ONT7:00 amOntario

39h 25m

2 stops

BKK1:25 pmBangkok Suvarnabhumi

Nov 17

BKK9:40 pmBangkok Suvarnabhumi

34h 36m

2 stops

ONT5:16 pmOntario

$751

Delta flights from Ontario to Thailand

Our best Delta deals on Ontario to Thailand flight tickets

Delta

Nov 28

ONT7:00 amOntario

25h 05m

2 stops

BKK11:05 pmBangkok Suvarnabhumi

Dec 17

BKK1:05 amBangkok Suvarnabhumi

31h 10m

2 stops

ONT5:15 pmOntario

$752

Delta

Nov 16

ONT6:00 amOntario

24h 30m

2 stops

BKK9:30 pmBangkok Suvarnabhumi

Dec 21

BKK9:50 amBangkok Suvarnabhumi

22h 08m

2 stops

ONT4:58 pmOntario

$753

Delta

Feb 4

ONT3:30 pmOntario

40h 15m

2 stops

CNX10:45 pmChiang Mai

Feb 9

CNX12:20 amChiang Mai

37h 23m

2 stops

ONT10:43 pmOntario

$758

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Thu 11/26

7:00 am-9:30 pm

2 stops47h 30m

Bangkok Suvarnabhumi

Mon 11/30

1:05 am-10:59 pm

2 stops36h 54m

$704

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Thu 11/12

7:00 am-10:45 pm

2 stops24h 45m

Chiang Mai

Wed 11/18

12:20 am-11:00 pm

2 stops37h 40m

$705

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sun 11/29

6:00 am-9:30 pm

2 stops24h 30m

Bangkok Suvarnabhumi

Sat 12/26

9:50 am-4:58 pm

2 stops22h 08m

$752

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 2/1

6:00 am-9:30 pm

2 stops24h 30m

Bangkok Suvarnabhumi

Tue 2/16

9:50 am-4:12 pm

2 stops21h 22m

$752

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 11/24

7:00 am-11:05 pm

2 stops25h 05m

Bangkok Suvarnabhumi

Tue 12/22

11:15 pm-4:58 pm

2 stops32h 43m

$807

Quickest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 3/8

10:50 pm-1:05 pm

1 stop23h 15m

Bangkok Suvarnabhumi

Fri 3/19

2:05 pm-6:05 pm

1 stop18h 00m

$811

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 3/8

10:50 pm-1:05 pm

1 stop23h 15m

Bangkok Suvarnabhumi

Fri 3/19

2:05 pm-6:05 pm

1 stop18h 00m

$811

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sat 1/23

9:45 pm-4:30 pm

1 stop27h 45m

Bangkok Suvarnabhumi

Sun 1/31

5:40 pm-3:55 pm

1 stop37h 15m

$868

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Fri 3/5

9:45 pm-4:30 pm

1 stop27h 45m

Bangkok Suvarnabhumi

Sat 3/20

2:50 pm-4:55 pm

1 stop16h 05m

$868

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 12/1

6:00 am-11:05 pm

2 stops26h 05m

Bangkok Suvarnabhumi

Sun 12/6

11:15 pm-4:22 pm

2 stops32h 07m

$877

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 $773. 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 $994 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 $827 on momondo.

Can stopping save me money on Ontario to Thailand flights?

You could potentially save up to 11% 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	$396
Fastest flight time	19h 55m
Direct flights	None

The best one-way flight to Thailand from Ontario in the past 72 hours is $396. The best round-trip flight deal from Ontario to Thailand found on momondo in the last 72 hours is $704.

The fastest flight from Ontario to Thailand takes 19h 55m

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 September 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 8,606 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 8.3 847 reviews	Search China Airlines flights
STARLUX Airlines	PriceFrom $731	Free Cancellation	Rating 8.7 387 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.