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

Delta, Korean Air, and United 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 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.

$346 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 - 11:05 pmONT Ontario-BKK Bangkok Suvarnabhumi

25h 05m2 stops Seattle/Tacoma Intl Incheon Intl

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

27h 53m2 stops Incheon Intl Seattle/Tacoma Intl

$700Korean Air

Wed, Jan 20 - Fri, Mar 12

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

23h 30m2 stops Seattle/Tacoma Intl Incheon Intl

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

26h 53m2 stops Incheon Intl Seattle/Tacoma Intl

$701Korean Air

Fri, Feb 26 - Wed, Mar 17

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

25h 05m2 stops Seattle/Tacoma Intl Incheon Intl

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

36h 38m2 stops Incheon Intl Seattle/Tacoma Intl

$730Delta

Wed, Jan 20 - Wed, Jan 27

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

25h 05m2 stops Seattle/Tacoma Intl Incheon Intl

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

36h 38m2 stops Incheon Intl Seattle/Tacoma Intl

$730Delta

Tue, Jan 19 - Wed, Jan 27

11:50 pm - 1:05 pmONT Ontario-BKK Bangkok Suvarnabhumi

23h 15m1 stop Taipei City Taiwan Taoyuan Intl

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

18h 00m1 stop Taipei City Taiwan Taoyuan Intl

$861China Airlines

Fri, Oct 30 - Tue, Nov 24

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

23h 15m1 stop Taipei City Taiwan Taoyuan Intl

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

38h 15m1 stop Taipei City Taiwan Taoyuan Intl

$861China Airlines

Mon, Nov 9 - Tue, Feb 16

9:25 am - 12:20 amONT Ontario-BKK Bangkok Suvarnabhumi

24h 55m2 stops San Francisco Tokyo Narita

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

21h 23m2 stops Tokyo Haneda San Francisco

$894United Airlines

Wed, Oct 28 - Mon, Nov 9

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

29h 13m2 stops San Francisco Hong Kong Intl

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

23h 46m2 stops Tokyo Haneda San Francisco

$899United Airlines

Thu, Oct 29 - Thu, Nov 5

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

$948STARLUX Airlines

Mon, Feb 15 - Sun, Feb 28

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

23h 50m1 stop Taipei City Taiwan Taoyuan Intl

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

17h 10m1 stop Taipei City Taiwan Taoyuan Intl

$948STARLUX Airlines

Mon, Nov 23 - Fri, Dec 4

Cheap last minute flights

Enter your travel dates to find the best prices.

12:10 am - 9:45 amONT Ontario-BKK Bangkok Suvarnabhumi

19h 35m1 stop Taipei City Taiwan Taoyuan Intl

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

38h 15m1 stop Taipei City Taiwan Taoyuan Intl

$928China Airlines

Sun, Oct 11 - Sun, Nov 1

12:10 am - 9:45 amONT Ontario-BKK Bangkok Suvarnabhumi

19h 35m1 stop Taipei City Taiwan Taoyuan Intl

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

21h 10m1 stop Taipei City Taiwan Taoyuan Intl

$943China Airlines

Sun, Oct 11 - Thu, Oct 22

12:10 am - 9:45 amONT Ontario-BKK Bangkok Suvarnabhumi

19h 35m1 stop Taipei City Taiwan Taoyuan Intl

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

38h 15m1 stop Taipei City Taiwan Taoyuan Intl

$944China Airlines

Mon, Oct 12 - Sun, Nov 1

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

27h 10m1 stop Taipei City Taiwan Taoyuan Intl

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

37h 15m1 stop Taipei City Taiwan Taoyuan Intl

$968STARLUX Airlines

Sat, Oct 10 - Tue, Oct 20

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

22h 30m1 stop Taipei City Taiwan Taoyuan Intl

5:40 pm - 4:55 pmBKK Bangkok Suvarnabhumi-ONT Ontario

37h 15m1 stop Taipei City Taiwan Taoyuan Intl

$1,015STARLUX Airlines

Sat, Oct 10 - Sun, Oct 25

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

22h 30m1 stop Taipei City Taiwan Taoyuan Intl

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

18h 40m1 stop Taipei City Taiwan Taoyuan Intl

$1,060Multiple Airlines

Sat, Oct 10 - Sat, Oct 17

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

22h 30m1 stop Taipei City Taiwan Taoyuan Intl

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

18h 40m1 stop Taipei City Taiwan Taoyuan Intl

$1,109Multiple Airlines

Sat, Oct 10 - Wed, Oct 21

9:45 am - 1:05 amONT Ontario-BKK Bangkok Suvarnabhumi

49h 20m2 stops Salt Lake City Incheon Intl

2:35 am - 8:55 amBKK Bangkok Suvarnabhumi-ONT Ontario

44h 20m2 stops Incheon Intl Salt Lake City

$1,353Delta

Mon, Oct 12 - Wed, Oct 21

6:20 am - 9:45 pmONT Ontario-BKK Bangkok Suvarnabhumi

25h 25m2 stops Seattle/Tacoma Intl Incheon Intl

2:35 am - 5:12 pmBKK Bangkok Suvarnabhumi-ONT Ontario

28h 37m2 stops Incheon Intl Seattle/Tacoma Intl

$1,661Korean Air

Sun, Oct 11 - Wed, Oct 21

6:20 am - 9:45 pmONT Ontario-BKK Bangkok Suvarnabhumi

25h 25m2 stops Seattle/Tacoma Intl Incheon Intl

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

31h 42m2 stops Incheon Intl Seattle/Tacoma Intl

$1,684Korean Air

Sun, Oct 11 - Fri, Oct 23

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Korean Air flights from Ontario to Thailand

Our best Korean Air deals on Ontario to Thailand flight tickets

Korean Air

Jan 20

ONT7:00 amOntario

25h 05m

2 stops

BKK11:05 pmBangkok Suvarnabhumi

Mar 12

BKK9:50 amBangkok Suvarnabhumi

27h 53m

2 stops

ONT10:43 pmOntario

$700

Korean Air

Feb 26

ONT7:00 amOntario

23h 30m

2 stops

BKK9:30 pmBangkok Suvarnabhumi

Mar 17

BKK9:50 amBangkok Suvarnabhumi

26h 53m

2 stops

ONT10:43 pmOntario

$701

Korean Air

Feb 4

ONT7:00 amOntario

23h 30m

2 stops

BKK9:30 pmBangkok Suvarnabhumi

Feb 17

BKK1:05 amBangkok Suvarnabhumi

27h 52m

2 stops

ONT1:57 pmOntario

$702

United Airlines flights from Ontario to Thailand

Our best United Airlines deals on Ontario to Thailand flight tickets

United Airlines

Oct 28

ONT9:25 amOntario

24h 55m

2 stops

BKK12:20 amBangkok Suvarnabhumi

Nov 9

BKK9:10 amBangkok Suvarnabhumi

21h 23m

2 stops

ONT3:33 pmOntario

$894

United Airlines

Oct 18

ONT1:52 pmOntario

44h 03m

2 stops

BKK11:55 pmBangkok Suvarnabhumi

Nov 9

BKK9:10 amBangkok Suvarnabhumi

21h 23m

2 stops

ONT3:33 pmOntario

$900

United Airlines

Oct 22

ONT4:03 pmOntario

27h 32m

2 stops

BKK9:35 amBangkok Suvarnabhumi

Oct 29

BKK7:10 amBangkok Suvarnabhumi

22h 23m

2 stops

ONT3:33 pmOntario

$901

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-11:05 pm

2 stops25h 05m

Bangkok Suvarnabhumi

Fri 3/12

9:50 am-10:43 pm

2 stops27h 53m

$700

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Fri 2/26

7:00 am-9:30 pm

2 stops23h 30m

Bangkok Suvarnabhumi

Wed 3/17

9:50 am-10:43 pm

2 stops26h 53m

$701

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 1/20

7:00 am-11:05 pm

2 stops25h 05m

Bangkok Suvarnabhumi

Wed 1/27

1:05 am-10:43 pm

2 stops36h 38m

$730

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 1/19

7:00 am-11:05 pm

2 stops25h 05m

Bangkok Suvarnabhumi

Wed 1/27

1:05 am-10:43 pm

2 stops36h 38m

$730

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Fri 10/30

11:50 pm-1:05 pm

1 stop23h 15m

Bangkok Suvarnabhumi

Tue 11/24

2:05 pm-5:05 pm

1 stop18h 00m

$861

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 11/9

10:50 pm-1:05 pm

1 stop23h 15m

Bangkok Suvarnabhumi

Tue 2/16

5:50 pm-5:05 pm

1 stop38h 15m

$861

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 10/28

9:25 am-12:20 am

2 stops24h 55m

Bangkok Suvarnabhumi

Mon 11/9

9:10 am-3:33 pm

2 stops21h 23m

$894

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Thu 10/29

4:17 pm-11:30 am

2 stops29h 13m

Bangkok Suvarnabhumi

Thu 11/5

9:10 am-5:56 pm

2 stops23h 46m

$899

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 2/15

9:45 pm-12:35 pm

1 stop23h 50m

Bangkok Suvarnabhumi

Sun 2/28

5:40 pm-3:55 pm

1 stop37h 15m

$948

Quickest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 11/23

9:45 pm-12:35 pm

1 stop23h 50m

Bangkok Suvarnabhumi

Fri 12/4

1:45 pm-3:55 pm

1 stop17h 10m

$948

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 $988 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	$346
Fastest flight time	20h 35m
Direct flights	None

The best one-way flight to Thailand from Ontario in the past 72 hours is $346. The best round-trip flight deal from Ontario to Thailand found on momondo in the last 72 hours is $700.

The fastest flight from Ontario to Thailand takes 20h 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 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 8,644 reviews	Search Delta flights
Korean Air	PriceFrom $455	Free Cancellation	Rating 8.4 1,217 reviews	Search Korean Air flights
China Airlines	PriceFrom $718	Free Cancellation	Rating 8.2 850 reviews	Search China Airlines flights
STARLUX Airlines	PriceFrom $731	Free Cancellation	Rating 8.8 393 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.