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

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

What airlines fly to Thailand?

Singapore Airlines, Cathay Pacific and Asiana 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 31% 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.

$392 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 - 1:05 amONT Ontario-BKK Bangkok Suvarnabhumi

29h 05m2 stops Seattle/Tacoma Intl Incheon Intl

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

45h 22m2 stops Incheon Intl Seattle/Tacoma Intl

$731Korean Air

Sun, Oct 4 - Wed, Oct 14

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

$760STARLUX Airlines

Mon, Nov 23 - Sun, Dec 20

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

$760STARLUX Airlines

Fri, Oct 2 - Tue, Oct 20

7:00 am - 11:20 pmONT Ontario-BKK Bangkok Suvarnabhumi

25h 20m2 stops Seattle/Tacoma Intl Incheon Intl

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

38h 28m2 stops Incheon Intl Seattle/Tacoma Intl

$803Korean Air

Wed, Jan 27 - Sun, Feb 7

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

$808China Airlines

Sat, Sep 26 - Tue, Oct 13

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

$815China Airlines

Sat, Sep 26 - Tue, Oct 13

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

25h 45m2 stops Salt Lake City Incheon Intl

11:30 pm - 5:19 pmBKK Bangkok Suvarnabhumi-ONT Ontario

31h 49m2 stops Incheon Intl Seattle/Tacoma Intl

$822Delta

Tue, Sep 15 - Wed, Sep 30

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

25h 45m2 stops Salt Lake City Incheon Intl

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

27h 57m2 stops Incheon Intl Salt Lake City

$822Delta

Tue, Sep 15 - Mon, Sep 28

11:54 am - 11:35 pmONT Ontario-BKK Bangkok Suvarnabhumi

45h 41m2 stops Seattle/Tacoma Intl Incheon Intl

9:40 pm - 10:43 pmBKK Bangkok Suvarnabhumi-ONT Ontario

39h 03m2 stops Incheon Intl Seattle/Tacoma Intl

$851Multiple Airlines

Sun, Sep 27 - Tue, Oct 13

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

32h 27m2 stops San Francisco Tokyo Haneda

9:35 am - 8:31 pmBKK Bangkok Suvarnabhumi-ONT Ontario

24h 56m2 stops Tokyo Haneda San Francisco

$888United Airlines

Sun, Sep 6 - Mon, Sep 28

Cheap last minute flights

Enter your travel dates to find the best prices.

11:55 pm - 12:00 pmONT Ontario-BKK Bangkok Suvarnabhumi

22h 05m1 stop Taipei City Taiwan Taoyuan Intl

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

17h 55m1 stop Taipei City Taiwan Taoyuan Intl

$776STARLUX Airlines

Sat, Aug 22 - Sat, Sep 12

11:55 pm - 4:40 pmONT Ontario-BKK Bangkok Suvarnabhumi

26h 45m1 stop Taipei City Taiwan Taoyuan Intl

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

17h 55m1 stop Taipei City Taiwan Taoyuan Intl

$777STARLUX Airlines

Wed, Aug 19 - Wed, Sep 16

12:45 am - 4:20 pmONT Ontario-BKK Bangkok Suvarnabhumi

25h 35m1 stop Taipei City Taiwan Taoyuan Intl

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

21h 50m1 stop Taipei City Taiwan Taoyuan Intl

$832China Airlines

Sat, Aug 22 - Mon, Aug 31

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

25h 25m2 stops Seattle/Tacoma Intl Incheon Intl

9:50 am - 10:40 pmBKK Bangkok Suvarnabhumi-ONT Ontario

26h 50m2 stops Incheon Intl Seattle/Tacoma Intl

$834Delta

Fri, Aug 21 - Tue, Sep 22

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

25h 25m2 stops Seattle/Tacoma Intl Incheon Intl

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

28h 44m2 stops Incheon Intl Seattle/Tacoma Intl

$839Korean Air

Fri, Aug 21 - Wed, Sep 16

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

25h 25m2 stops Seattle/Tacoma Intl Incheon Intl

11:30 pm - 5:19 pmBKK Bangkok Suvarnabhumi-ONT Ontario

31h 49m2 stops Incheon Intl Seattle/Tacoma Intl

$839Korean Air

Fri, Aug 21 - Mon, Sep 21

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

19h 00m1 stop Taipei City Taiwan Taoyuan Intl

1:20 pm - 6:40 pmBKK Bangkok Suvarnabhumi-ONT Ontario

19h 20m1 stop Taipei City Taiwan Taoyuan Intl

$840China Airlines

Fri, Aug 21 - Fri, Sep 11

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

25h 25m2 stops Seattle/Tacoma Intl Incheon Intl

2:35 am - 10:40 pmBKK Bangkok Suvarnabhumi-ONT Ontario

34h 05m2 stops Incheon Intl Seattle/Tacoma Intl

$846Delta

Fri, Aug 21 - Thu, Sep 17

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

Sun, Aug 23 - Thu, Sep 17

12:45 am - 7:55 pmONT Ontario-CNX Chiang Mai

29h 10m2 stops Taipei City Taiwan Taoyuan Intl Bangkok Suvarnabhumi

11:20 am - 6:40 pmCNX Chiang Mai-ONT Ontario

21h 20m1 stop Taipei City Taiwan Taoyuan Intl

$987Multiple Airlines

Sun, Aug 23 - Mon, Sep 14

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STARLUX Airlines flights from Ontario to Thailand

Our best STARLUX Airlines deals on Ontario to Thailand flight tickets

STARLUX Airlines

Oct 2

ONT11:30 pmOntario

27h 10m

1 stop

BKK4:40 pmBangkok Suvarnabhumi

Oct 20

BKK5:50 pmBangkok Suvarnabhumi

37h 15m

1 stop

ONT5:05 pmOntario

$760

STARLUX Airlines

Sep 19

ONT11:30 pmOntario

22h 30m

1 stop

BKK12:00 pmBangkok Suvarnabhumi

Oct 3

BKK1:10 pmBangkok Suvarnabhumi

17h 55m

1 stop

ONT5:05 pmOntario

$763

STARLUX Airlines

Sep 19

ONT11:30 pmOntario

22h 30m

1 stop

BKK12:00 pmBangkok Suvarnabhumi

Oct 3

BKK1:10 pmBangkok Suvarnabhumi

17h 55m

1 stop

ONT5:05 pmOntario

$764

Delta flights from Ontario to Thailand

Our best Delta deals on Ontario to Thailand flight tickets

Delta

Sep 9

ONT6:00 amOntario

25h 45m

2 stops

BKK9:45 pmBangkok Suvarnabhumi

Sep 22

BKK9:50 amBangkok Suvarnabhumi

26h 50m

2 stops

ONT10:40 pmOntario

$822

Delta

Nov 13

ONT7:04 amOntario

25h 16m

2 stops

BKK11:20 pmBangkok Suvarnabhumi

Nov 26

BKK9:40 amBangkok Suvarnabhumi

22h 33m

2 stops

ONT5:13 pmOntario

$834

Delta

Sep 5

ONT6:20 amOntario

27h 15m

2 stops

BKK11:35 pmBangkok Suvarnabhumi

Sep 25

BKK11:30 pmBangkok Suvarnabhumi

36h 34m

2 stops

ONT10:04 pmOntario

$846

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sun 10/4

6:00 am-1:05 am

2 stops29h 05m

Bangkok Suvarnabhumi

Wed 10/14

9:50 am-5:12 pm

2 stops45h 22m

$731

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 11/23

9:45 pm-12:35 pm

1 stop23h 50m

Bangkok Suvarnabhumi

Sun 12/20

5:40 pm-3:55 pm

1 stop37h 15m

$760

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Fri 10/2

11:30 pm-4:40 pm

1 stop27h 10m

Bangkok Suvarnabhumi

Tue 10/20

5:50 pm-5:05 pm

1 stop37h 15m

$760

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 1/27

7:00 am-11:20 pm

2 stops25h 20m

Bangkok Suvarnabhumi

Sun 2/7

11:15 pm-10:43 pm

2 stops38h 28m

$803

Quickest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sat 9/26

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

Tue 10/13

1:20 pm-6:00 pm

1 stop18h 40m

$808

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sat 9/26

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

Tue 10/13

1:20 pm-6:00 pm

1 stop18h 40m

$815

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 9/15

6:00 am-9:45 pm

2 stops25h 45m

Bangkok Suvarnabhumi

Wed 9/30

11:30 pm-5:19 pm

2 stops31h 49m

$822

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 9/15

6:00 am-9:45 pm

2 stops25h 45m

Bangkok Suvarnabhumi

Mon 9/28

9:50 am-11:47 pm

2 stops27h 57m

$822

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sun 9/27

11:54 am-11:35 pm

2 stops45h 41m

Bangkok Suvarnabhumi

Tue 10/13

9:40 pm-10:43 pm

2 stops39h 03m

$851

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sun 9/6

6:08 am-4:35 am

2 stops32h 27m

Bangkok Suvarnabhumi

Mon 9/28

9:35 am-8:31 pm

2 stops24h 56m

$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 $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 $987 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 17% 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 35m
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 $731.

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 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 8,499 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 8.3 842 reviews	Search China Airlines flights
STARLUX Airlines	PriceFrom $731	Free Cancellation	Rating 8.8 371 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.