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

Delta, Korean Air, 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.

$392 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.

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

$757STARLUX Airlines

Wed, Jan 20 - Tue, Feb 9

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

$757STARLUX Airlines

Wed, Jan 20 - Tue, Feb 9

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

23h 30m2 stops Seattle/Tacoma Intl Incheon Intl

11:30 pm - 5:17 pmBKK Bangkok Suvarnabhumi-ONT Ontario

31h 47m2 stops Incheon Intl Seattle/Tacoma Intl

$790Korean Air

Mon, Feb 1 - Mon, Apr 26

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

$802China Airlines

Tue, Sep 29 - Thu, Oct 15

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

$808China Airlines

Sun, Feb 7 - Sun, Feb 21

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

26h 25m2 stops Seattle/Tacoma Intl Incheon Intl

12:20 am - 5:19 pmCNX Chiang Mai-ONT Ontario

31h 59m2 stops Incheon Intl Seattle/Tacoma Intl

$823Delta

Wed, Oct 28 - Sun, Nov 8

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

26h 25m2 stops Seattle/Tacoma Intl Incheon Intl

12:20 am - 4:24 pmCNX Chiang Mai-ONT Ontario

31h 04m2 stops Incheon Intl Salt Lake City

$823Delta

Thu, Oct 29 - Sun, Nov 8

6:00 am - 1:25 pmONT Ontario-BKK Bangkok Suvarnabhumi

40h 25m2 stops Salt Lake City Incheon Intl

9:40 pm - 5:19 pmBKK Bangkok Suvarnabhumi-ONT Ontario

34h 39m2 stops Incheon Intl Seattle/Tacoma Intl

$825Korean Air

Sun, Nov 1 - Sun, Nov 8

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

25h 05m2 stops Seattle/Tacoma Intl Incheon Intl

1:05 am - 5:15 pmBKK Bangkok Suvarnabhumi-ONT Ontario

31h 10m2 stops Incheon Intl Seattle/Tacoma Intl

$876Multiple Airlines

Tue, Nov 24 - Mon, Dec 14

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

25h 05m2 stops Seattle/Tacoma Intl Incheon Intl

1:05 am - 4:10 pmBKK Bangkok Suvarnabhumi-ONT Ontario

30h 05m2 stops Incheon Intl Salt Lake City

$888Multiple Airlines

Wed, Dec 2 - Sat, Dec 26

Cheap last minute flights

Enter your travel dates to find the best prices.

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

29h 05m2 stops Salt Lake City Incheon Intl

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

21h 22m2 stops Incheon Intl Seattle/Tacoma Intl

$823Delta

Wed, Sep 23 - Tue, Oct 6

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

29h 05m2 stops Seattle/Tacoma Intl Incheon Intl

2:35 am - 11:47 pmBKK Bangkok Suvarnabhumi-ONT Ontario

35h 12m2 stops Incheon Intl Salt Lake City

$823Delta

Wed, Sep 23 - Tue, Sep 29

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

25h 45m2 stops Seattle/Tacoma Intl Incheon Intl

2:35 am - 5:19 pmBKK Bangkok Suvarnabhumi-ONT Ontario

28h 44m2 stops Incheon Intl Seattle/Tacoma Intl

$828Korean Air

Tue, Sep 22 - Mon, Sep 28

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

25h 45m2 stops Seattle/Tacoma Intl Incheon Intl

2:35 am - 5:19 pmBKK Bangkok Suvarnabhumi-ONT Ontario

28h 44m2 stops Incheon Intl Seattle/Tacoma Intl

$828Korean Air

Tue, Sep 22 - Tue, Sep 29

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

$831China Airlines

Sun, Sep 20 - Wed, Sep 23

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

$834China Airlines

Sat, Sep 19 - Fri, Oct 2

9:01 am - 10:15 pmONT Ontario-BKK Bangkok Suvarnabhumi

23h 14m2 stops San Francisco Tokyo Narita

3:45 pm - 10:23 amBKK Bangkok Suvarnabhumi-ONT Ontario

32h 38m2 stops Hong Kong Intl San Francisco

$955United Airlines

Mon, Sep 21 - Wed, Sep 23

6:08 am - 11:55 pmONT Ontario-BKK Bangkok Suvarnabhumi

27h 47m2 stops San Francisco Tokyo Narita

3:45 pm - 6:16 pmBKK Bangkok Suvarnabhumi-ONT Ontario

40h 31m2 stops Hong Kong Intl San Francisco

$961United Airlines

Sun, Sep 20 - Tue, Sep 22

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

22h 30m1 stop Taipei City Taiwan Taoyuan Intl

1:10 pm - 10:53 pmBKK Bangkok Suvarnabhumi-ONT Ontario

23h 43m2 stops Taipei City Taiwan Taoyuan Intl Phoenix Sky Harbor Intl

$1,050STARLUX Airlines

Sat, Sep 19 - Sun, Oct 11

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

$4,781STARLUX Airlines

Sat, Sep 19 - Sat, Oct 3

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China Airlines flights from Ontario to Thailand

Our best China Airlines deals on Ontario to Thailand flight tickets

China Airlines

Sep 29

ONT12:10 amOntario

26h 10m

1 stop

BKK4:20 pmBangkok Suvarnabhumi

Oct 15

BKK10:50 amBangkok Suvarnabhumi

21h 10m

1 stop

ONT6:00 pmOntario

$802

China Airlines

Sep 26

ONT12:10 amOntario

26h 10m

1 stop

BKK4:20 pmBangkok Suvarnabhumi

Oct 10

BKK1:20 pmBangkok Suvarnabhumi

18h 40m

1 stop

ONT6:00 pmOntario

$804

China Airlines

Feb 7

ONT10:50 pmOntario

35h 45m

1 stop

BKK1:35 amBangkok Suvarnabhumi

Feb 21

BKK2:05 pmBangkok Suvarnabhumi

18h 00m

1 stop

ONT5:05 pmOntario

$808

STARLUX Airlines flights from Ontario to Thailand

Our best STARLUX Airlines deals on Ontario to Thailand flight tickets

STARLUX Airlines

Jan 20

ONT9:45 pmOntario

23h 50m

1 stop

BKK12:35 pmBangkok Suvarnabhumi

Feb 9

BKK1:45 pmBangkok Suvarnabhumi

17h 10m

1 stop

ONT3:55 pmOntario

$757

STARLUX Airlines

Feb 6

ONT9:45 pmOntario

23h 50m

1 stop

BKK12:35 pmBangkok Suvarnabhumi

Feb 19

BKK1:45 pmBangkok Suvarnabhumi

17h 10m

1 stop

ONT3:55 pmOntario

$758

STARLUX Airlines

Mar 12

ONT9:45 pmOntario

27h 45m

1 stop

BKK4:30 pmBangkok Suvarnabhumi

Mar 28

BKK5:50 pmBangkok Suvarnabhumi

37h 15m

1 stop

ONT5:05 pmOntario

$762

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 1/20

9:45 pm-12:35 pm

1 stop23h 50m

Bangkok Suvarnabhumi

Tue 2/9

1:45 pm-3:55 pm

1 stop17h 10m

$757

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 1/20

9:45 pm-12:35 pm

1 stop23h 50m

Bangkok Suvarnabhumi

Tue 2/9

1:45 pm-3:55 pm

1 stop17h 10m

$757

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 2/1

7:00 am-9:30 pm

2 stops23h 30m

Bangkok Suvarnabhumi

Mon 4/26

11:30 pm-5:17 pm

2 stops31h 47m

$790

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 9/29

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

Thu 10/15

10:50 am-6:00 pm

1 stop21h 10m

$802

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sun 2/7

10:50 pm-1:35 am

1 stop35h 45m

Bangkok Suvarnabhumi

Sun 2/21

2:05 pm-5:05 pm

1 stop18h 00m

$808

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Wed 10/28

6:20 am-10:45 pm

2 stops26h 25m

Chiang Mai

Sun 11/8

12:20 am-5:19 pm

2 stops31h 59m

$823

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Thu 10/29

6:20 am-10:45 pm

2 stops26h 25m

Chiang Mai

Sun 11/8

12:20 am-4:24 pm

2 stops31h 04m

$823

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sun 11/1

6:00 am-1:25 pm

2 stops40h 25m

Bangkok Suvarnabhumi

Sun 11/8

9:40 pm-5:19 pm

2 stops34h 39m

$825

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 11/24

7:00 am-11:05 pm

2 stops25h 05m

Bangkok Suvarnabhumi

Mon 12/14

1:05 am-5:15 pm

2 stops31h 10m

$876

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 12/2

7:00 am-11:05 pm

2 stops25h 05m

Bangkok Suvarnabhumi

Sat 12/26

1:05 am-4:10 pm

2 stops30h 05m

$888

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 $768. 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 $992 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 $795 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	$392
Fastest flight time	20h 00m
Direct flights	None

The best one-way flight to Thailand from Ontario in the past 72 hours is $392. The best round-trip flight deal from Ontario to Thailand found on momondo in the last 72 hours is $757.

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 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 8,582 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 8.7 380 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.