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

Korean Air and Delta 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 August 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.

$406 Cheap Flights from Ontario to Thailand in 2026

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.

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

25h 45m2 stops Seattle/Tacoma Intl Incheon Intl

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

28h 37m2 stops Incheon Intl Seattle/Tacoma Intl

$791Korean Air

Sun, Sep 27 - Mon, Oct 12

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

25h 25m2 stops Seattle/Tacoma Intl Incheon Intl

12:55 am - 5:12 pmBKK Bangkok Suvarnabhumi-ONT Ontario

30h 17m2 stops Incheon Intl Seattle/Tacoma Intl

$803Korean Air

Tue, Oct 6 - Tue, Oct 27

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

$806China Airlines

Sat, Sep 19 - Sun, Oct 4

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

$810China Airlines

Tue, Nov 3 - Sat, Nov 21

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

27h 00m1 stop Taipei City Taiwan Taoyuan Intl

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

37h 15m1 stop Taipei City Taiwan Taoyuan Intl

$815STARLUX Airlines

Fri, Oct 23 - Fri, Nov 6

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

22h 30m1 stop Taipei City Taiwan Taoyuan Intl

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

17h 55m1 stop Taipei City Taiwan Taoyuan Intl

$820STARLUX Airlines

Sat, Sep 12 - Fri, Oct 16

6:00 am - 10:55 pmONT Ontario-CNX Chiang Mai

25h 55m2 stops Salt Lake City Incheon Intl

12:15 am - 10:43 pmCNX Chiang Mai-ONT Ontario

37h 28m2 stops Incheon Intl Seattle/Tacoma Intl

$822Delta

Thu, Jan 28 - Mon, Feb 15

6:00 am - 10:55 pmONT Ontario-CNX Chiang Mai

25h 55m2 stops Salt Lake City Incheon Intl

12:15 am - 10:43 pmCNX Chiang Mai-ONT Ontario

37h 28m2 stops Incheon Intl Seattle/Tacoma Intl

$822Delta

Thu, Jan 28 - Tue, Feb 16

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

25h 45m2 stops Salt Lake City Incheon Intl

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

28h 37m2 stops Incheon Intl Seattle/Tacoma Intl

$877Multiple Airlines

Tue, Sep 22 - Mon, Oct 12

6:00 am - 11:20 pmONT Ontario-BKK Bangkok Suvarnabhumi

26h 20m2 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

Wed, Nov 25 - Sun, Dec 13

Cheap last minute flights

Enter your travel dates to find the best prices.

6:20 am - 11:35 pmONT Ontario-BKK Bangkok Suvarnabhumi

27h 15m2 stops Seattle/Tacoma Intl Incheon Intl

2:35 am - 10:45 pmBKK Bangkok Suvarnabhumi-ONT Ontario

34h 10m2 stops Incheon Intl Seattle/Tacoma Intl

$822Delta

Tue, Aug 25 - Wed, Sep 2

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

25h 25m2 stops Seattle/Tacoma Intl Incheon Intl

9:50 am - 11:47 pmBKK Bangkok Suvarnabhumi-ONT Ontario

27h 57m2 stops Incheon Intl Salt Lake City

$822Delta

Thu, Aug 27 - Thu, Sep 24

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

25h 25m2 stops Seattle/Tacoma Intl Incheon Intl

9:50 am - 10:45 pmBKK Bangkok Suvarnabhumi-ONT Ontario

26h 55m2 stops Incheon Intl Seattle/Tacoma Intl

$822Delta

Thu, Aug 27 - Tue, Sep 1

12:45 am - 12:10 pmONT Ontario-BKK Bangkok Suvarnabhumi

21h 25m1 stop Taipei City Taiwan Taoyuan Intl

10:50 am - 6:40 pmBKK Bangkok Suvarnabhumi-ONT Ontario

21h 50m1 stop Taipei City Taiwan Taoyuan Intl

$833China Airlines

Tue, Aug 25 - Fri, Aug 28

12:45 am - 12:10 pmONT Ontario-BKK Bangkok Suvarnabhumi

21h 25m1 stop Taipei City Taiwan Taoyuan Intl

5:30 pm - 6:40 pmBKK Bangkok Suvarnabhumi-ONT Ontario

39h 10m1 stop Taipei City Taiwan Taoyuan Intl

$833China Airlines

Tue, Aug 25 - Sun, Sep 13

5:00 am - 11:55 pmONT Ontario-BKK Bangkok Suvarnabhumi

28h 55m2 stops Denver Intl Tokyo Narita

7:00 am - 6:11 pmBKK Bangkok Suvarnabhumi-ONT Ontario

25h 11m2 stops Tokyo Narita San Francisco

$892United Airlines

Sat, Aug 29 - Mon, Sep 7

6:08 am - 4:35 amONT Ontario-BKK Bangkok Suvarnabhumi

32h 27m2 stops San Francisco Tokyo Haneda

3:45 pm - 3:41 pmBKK Bangkok Suvarnabhumi-ONT Ontario

37h 56m2 stops Hong Kong Intl San Francisco

$906United Airlines

Tue, Aug 25 - Fri, Aug 28

7:59 pm - 4:40 pmONT Ontario-BKK Bangkok Suvarnabhumi

30h 41m2 stops Seattle/Tacoma Intl Taipei City Taiwan Taoyuan Intl

1:10 pm - 5:40 pmBKK Bangkok Suvarnabhumi-ONT Ontario

18h 30m1 stop Taipei City Taiwan Taoyuan Intl

$1,138STARLUX Airlines

Thu, Aug 27 - Mon, Aug 31

7:59 pm - 4:40 pmONT Ontario-BKK Bangkok Suvarnabhumi

30h 41m2 stops Seattle/Tacoma Intl Taipei City Taiwan Taoyuan Intl

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

37h 15m1 stop Taipei City Taiwan Taoyuan Intl

$1,138STARLUX Airlines

Fri, Aug 28 - Tue, Sep 15

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

25h 25m2 stops Seattle/Tacoma Intl Incheon Intl

9:50 am - 10:45 pmBKK Bangkok Suvarnabhumi-ONT Ontario

26h 55m2 stops Incheon Intl Seattle/Tacoma Intl

$1,409Korean Air

Thu, Aug 27 - Sat, Aug 29

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Korean Air flights from Ontario to Thailand

Our best Korean Air deals on Ontario to Thailand flight tickets

Korean Air

Sep 27

ONT6:00 amOntario

25h 45m

2 stops

BKK9:45 pmBangkok Suvarnabhumi

Oct 12

BKK2:35 amBangkok Suvarnabhumi

28h 37m

2 stops

ONT5:12 pmOntario

$791

Korean Air

Oct 6

ONT6:20 amOntario

25h 25m

2 stops

BKK9:45 pmBangkok Suvarnabhumi

Oct 27

BKK12:55 amBangkok Suvarnabhumi

30h 17m

2 stops

ONT5:12 pmOntario

$803

Korean Air

Sep 3

ONT6:20 amOntario

25h 25m

2 stops

BKK9:45 pmBangkok Suvarnabhumi

Sep 8

BKK2:35 amBangkok Suvarnabhumi

28h 44m

2 stops

ONT5:19 pmOntario

$828

China Airlines flights from Ontario to Thailand

Our best China Airlines deals on Ontario to Thailand flight tickets

China Airlines

Sep 19

ONT12:10 amOntario

22h 00m

1 stop

BKK12:10 pmBangkok Suvarnabhumi

Oct 4

BKK10:50 amBangkok Suvarnabhumi

21h 10m

1 stop

ONT6:00 pmOntario

$806

China Airlines

Sep 21

ONT12:10 amOntario

19h 35m

1 stop

BKK9:45 amBangkok Suvarnabhumi

Sep 28

BKK2:40 amBangkok Suvarnabhumi

29h 20m

1 stop

ONT6:00 pmOntario

$810

China Airlines

Sep 2

ONT12:45 amOntario

21h 25m

1 stop

BKK12:10 pmBangkok Suvarnabhumi

Sep 30

BKK1:20 pmBangkok Suvarnabhumi

18h 40m

1 stop

ONT6:00 pmOntario

$811

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sun 9/27

6:00 am-9:45 pm

2 stops25h 45m

Bangkok Suvarnabhumi

Mon 10/12

2:35 am-5:12 pm

2 stops28h 37m

$791

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 10/6

6:20 am-9:45 pm

2 stops25h 25m

Bangkok Suvarnabhumi

Tue 10/27

12:55 am-5:12 pm

2 stops30h 17m

$803

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sat 9/19

12:10 am-12:10 pm

1 stop22h 00m

Bangkok Suvarnabhumi

Sun 10/4

10:50 am-6:00 pm

1 stop21h 10m

$806

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 11/3

10:50 pm-1:35 am

1 stop35h 45m

Bangkok Suvarnabhumi

Sat 11/21

10:55 am-5:05 pm

1 stop21h 10m

$810

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Fri 10/23

11:30 pm-4:30 pm

1 stop27h 00m

Bangkok Suvarnabhumi

Fri 11/6

5:40 pm-3:55 pm

1 stop37h 15m

$815

Quickest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sat 9/12

11:30 pm-12:00 pm

1 stop22h 30m

Bangkok Suvarnabhumi

Fri 10/16

1:10 pm-5:05 pm

1 stop17h 55m

$820

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Thu 1/28

6:00 am-10:55 pm

2 stops25h 55m

Chiang Mai

Mon 2/15

12:15 am-10:43 pm

2 stops37h 28m

$822

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Thu 1/28

6:00 am-10:55 pm

2 stops25h 55m

Chiang Mai

Tue 2/16

12:15 am-10:43 pm

2 stops37h 28m

$822

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 9/22

6:00 am-9:45 pm

2 stops25h 45m

Bangkok Suvarnabhumi

Mon 10/12

2:35 am-5:12 pm

2 stops28h 37m

$877

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 11/25

6:00 am-11:20 pm

2 stops26h 20m

Bangkok Suvarnabhumi

Sun 12/13

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 $765. If you are unable to visit Thailand during the month of January, then departing from Ontario during the month February is also very affordable. Most momondo users find prices during this month for around $783.

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 $991 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 $786 on momondo.

Can stopping save me money on Ontario to Thailand flights?

You could potentially save up to 28% 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	$406
Fastest flight time	20h 00m
Direct flights	None

The best one-way flight to Thailand from Ontario in the past 72 hours is $406. The best round-trip flight deal from Ontario to Thailand found on momondo in the last 72 hours is $791.

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 August 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 8,518 reviews	Search Delta flights
Korean Air	PriceFrom $455	Free Cancellation	Rating 8.4 1,221 reviews	Search Korean Air flights
China Airlines	PriceFrom $718	Free Cancellation	Rating 8.3 843 reviews	Search China Airlines flights
STARLUX Airlines	PriceFrom $731	Free Cancellation	Rating 8.7 376 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.