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 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 34% 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 November 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.

$350 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.

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

23h 15m1 stop Taipei City Taiwan Taoyuan Intl

10:55 am - 5:05 pmBKK Bangkok Suvarnabhumi-ONT Ontario

21h 10m1 stop Taipei City Taiwan Taoyuan Intl

$516China Airlines

Sun, Jan 10 - Sat, Jan 16

10:50 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

$577China Airlines

Tue, Dec 1 - Sun, Dec 13

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

23h 30m2 stops Seattle/Tacoma Intl Incheon Intl

1:05 am - 10:35 pmBKK Bangkok Suvarnabhumi-ONT Ontario

36h 30m2 stops Incheon Intl Seattle/Tacoma Intl

$755Korean Air

Wed, Jan 27 - Thu, Feb 4

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

23h 30m2 stops Seattle/Tacoma Intl Incheon Intl

1:05 am - 2:48 pmBKK Bangkok Suvarnabhumi-ONT Ontario

28h 43m2 stops Incheon Intl Seattle/Tacoma Intl

$777Korean Air

Thu, Feb 11 - Sat, Feb 20

6:00 am - 12:20 amONT Ontario-BKK Bangkok Suvarnabhumi

27h 20m2 stops Salt Lake City Incheon Intl

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

36h 38m2 stops Incheon Intl Seattle/Tacoma Intl

$780Delta

Mon, Feb 8 - Tue, Mar 9

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

47h 30m2 stops Seattle/Tacoma Intl Incheon Intl

9:40 pm - 5:17 pmBKK Bangkok Suvarnabhumi-ONT Ontario

34h 37m2 stops Incheon Intl Seattle/Tacoma Intl

$780Delta

Tue, Feb 9 - Wed, Mar 10

6:37 pm - 11:30 amONT Ontario-BKK Bangkok Suvarnabhumi

25h 53m2 stops San Francisco Hong Kong Intl

9:35 am - 8:07 pmBKK Bangkok Suvarnabhumi-ONT Ontario

24h 32m2 stops Tokyo Haneda San Francisco

$885United Airlines

Mon, Feb 15 - Mon, Apr 26

6:53 pm - 11:30 amONT Ontario-BKK Bangkok Suvarnabhumi

26h 37m2 stops San Francisco Hong Kong Intl

9:35 am - 8:07 pmBKK Bangkok Suvarnabhumi-ONT Ontario

24h 32m2 stops Tokyo Haneda San Francisco

$885United Airlines

Tue, Mar 23 - Tue, Apr 20

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

23h 50m1 stop Taipei City Taiwan Taoyuan Intl

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

37h 15m1 stop Taipei City Taiwan Taoyuan Intl

$947STARLUX Airlines

Sat, Jan 9 - Thu, May 27

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

27h 45m1 stop Taipei City Taiwan Taoyuan Intl

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

17h 10m1 stop Taipei City Taiwan Taoyuan Intl

$952STARLUX Airlines

Sat, Jan 30 - Mon, Feb 8

Cheap last minute flights

Enter your travel dates to find the best prices.

7:00 am - 12:20 amONT Ontario-BKK Bangkok Suvarnabhumi

26h 20m2 stops Seattle/Tacoma Intl Incheon Intl

1:05 am - 5:16 pmBKK Bangkok Suvarnabhumi-ONT Ontario

31h 11m2 stops Incheon Intl Seattle/Tacoma Intl

$848Korean Air

Tue, Nov 10 - Sun, Nov 22

7:00 am - 12:20 amONT Ontario-BKK Bangkok Suvarnabhumi

26h 20m2 stops Seattle/Tacoma Intl Incheon Intl

9:40 pm - 5:16 pmBKK Bangkok Suvarnabhumi-ONT Ontario

34h 36m2 stops Incheon Intl Seattle/Tacoma Intl

$848Korean Air

Tue, Nov 10 - Wed, Nov 25

7:00 am - 12:20 amONT Ontario-BKK Bangkok Suvarnabhumi

26h 20m2 stops Seattle/Tacoma Intl Incheon Intl

9:40 pm - 11:00 pmBKK Bangkok Suvarnabhumi-ONT Ontario

40h 20m2 stops Incheon Intl Seattle/Tacoma Intl

$892Delta

Tue, Nov 10 - Tue, Nov 24

5:56 pm - 12:20 amONT Ontario-BKK Bangkok Suvarnabhumi

39h 24m2 stops Seattle/Tacoma Intl Incheon Intl

9:40 pm - 11:00 pmBKK Bangkok Suvarnabhumi-ONT Ontario

40h 20m2 stops Incheon Intl Seattle/Tacoma Intl

$898Delta

Mon, Nov 9 - Tue, Nov 24

6:00 am - 5:10 amONT Ontario-BKK Bangkok Suvarnabhumi

32h 10m2 stops San Francisco Tokyo Haneda

4:55 pm - 10:48 pmBKK Bangkok Suvarnabhumi-ONT Ontario

20h 53m2 stops Hong Kong Intl San Francisco

$915United Airlines

Sun, Nov 8 - Tue, Nov 24

6:00 am - 5:10 amONT Ontario-BKK Bangkok Suvarnabhumi

32h 10m2 stops San Francisco Tokyo Haneda

4:55 pm - 10:48 pmBKK Bangkok Suvarnabhumi-ONT Ontario

20h 53m2 stops Hong Kong Intl San Francisco

$915United Airlines

Sun, Nov 8 - Mon, Nov 23

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

27h 45m1 stop Taipei City Taiwan Taoyuan Intl

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

17h 10m1 stop Taipei City Taiwan Taoyuan Intl

$970STARLUX Airlines

Sat, Nov 7 - Wed, Mar 3

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

27h 45m1 stop Taipei City Taiwan Taoyuan Intl

2:50 pm - 3:55 pmBKK Bangkok Suvarnabhumi-ONT Ontario

16h 05m1 stop Taipei City Taiwan Taoyuan Intl

$970STARLUX Airlines

Mon, Nov 9 - Sat, Dec 12

10:50 pm - 9:50 amONT Ontario-BKK Bangkok Suvarnabhumi

20h 00m1 stop Taipei City Taiwan Taoyuan Intl

10:55 am - 5:05 pmBKK Bangkok Suvarnabhumi-ONT Ontario

21h 10m1 stop Taipei City Taiwan Taoyuan Intl

$990China Airlines

Wed, Nov 11 - Mon, Nov 23

10:50 pm - 9:50 amONT Ontario-BKK Bangkok Suvarnabhumi

20h 00m1 stop Taipei City Taiwan Taoyuan Intl

10:55 am - 5:05 pmBKK Bangkok Suvarnabhumi-ONT Ontario

21h 10m1 stop Taipei City Taiwan Taoyuan Intl

$995China Airlines

Sun, Nov 8 - Wed, Dec 16

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Korean Air flights from Ontario to Thailand

Our best Korean Air deals on Ontario to Thailand flight tickets

Korean Air

Jan 27

ONT7:00 amOntario

23h 30m

2 stops

BKK9:30 pmBangkok Suvarnabhumi

Feb 4

BKK1:05 amBangkok Suvarnabhumi

36h 30m

2 stops

ONT10:35 pmOntario

$755

Korean Air

Feb 11

ONT7:00 amOntario

23h 30m

2 stops

BKK9:30 pmBangkok Suvarnabhumi

Feb 20

BKK1:05 amBangkok Suvarnabhumi

28h 43m

2 stops

ONT2:48 pmOntario

$777

Korean Air

Feb 10

ONT3:35 pmOntario

38h 55m

2 stops

BKK9:30 pmBangkok Suvarnabhumi

Mar 7

BKK9:40 pmBangkok Suvarnabhumi

34h 37m

2 stops

ONT5:17 pmOntario

$786

Delta flights from Ontario to Thailand

Our best Delta deals on Ontario to Thailand flight tickets

Delta

Feb 8

ONT6:00 amOntario

26h 05m

2 stops

BKK11:05 pmBangkok Suvarnabhumi

Mar 8

BKK11:15 pmBangkok Suvarnabhumi

38h 28m

2 stops

ONT10:43 pmOntario

$780

Delta

Jan 16

ONT7:00 amOntario

25h 05m

2 stops

BKK11:05 pmBangkok Suvarnabhumi

Feb 5

BKK9:50 amBangkok Suvarnabhumi

21h 37m

2 stops

ONT4:27 pmOntario

$792

Delta

Mar 2

ONT7:00 amOntario

25h 05m

2 stops

BKK11:05 pmBangkok Suvarnabhumi

Mar 8

BKK11:15 pmBangkok Suvarnabhumi

33h 02m

2 stops

ONT5:17 pmOntario

$830

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sun 1/10

10:50 pm-1:05 pm

1 stop23h 15m

Bangkok Suvarnabhumi

Sat 1/16

10:55 am-5:05 pm

1 stop21h 10m

$516

Quickest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 12/1

10:50 pm-1:05 pm

1 stop23h 15m

Bangkok Suvarnabhumi

Sun 12/13

2:05 pm-5:05 pm

1 stop18h 00m

$577

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 1/27

7:00 am-9:30 pm

2 stops23h 30m

Bangkok Suvarnabhumi

Thu 2/4

1:05 am-10:35 pm

2 stops36h 30m

$755

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Thu 2/11

7:00 am-9:30 pm

2 stops23h 30m

Bangkok Suvarnabhumi

Sat 2/20

1:05 am-2:48 pm

2 stops28h 43m

$777

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 2/8

6:00 am-12:20 am

2 stops27h 20m

Bangkok Suvarnabhumi

Tue 3/9

1:05 am-10:43 pm

2 stops36h 38m

$780

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 2/9

7:00 am-9:30 pm

2 stops47h 30m

Bangkok Suvarnabhumi

Wed 3/10

9:40 pm-5:17 pm

2 stops34h 37m

$780

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 2/15

6:37 pm-11:30 am

2 stops25h 53m

Bangkok Suvarnabhumi

Mon 4/26

9:35 am-8:07 pm

2 stops24h 32m

$885

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 3/23

6:53 pm-11:30 am

2 stops26h 37m

Bangkok Suvarnabhumi

Tue 4/20

9:35 am-8:07 pm

2 stops24h 32m

$885

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sat 1/9

9:45 pm-12:35 pm

1 stop23h 50m

Bangkok Suvarnabhumi

Thu 5/27

5:50 pm-5:05 pm

1 stop37h 15m

$947

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sat 1/30

9:45 pm-4:30 pm

1 stop27h 45m

Bangkok Suvarnabhumi

Mon 2/8

1:45 pm-3:55 pm

1 stop17h 10m

$952

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 $771. 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 $956 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 $810 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	$350
Fastest flight time	20h 00m
Direct flights	None

The best one-way flight to Thailand from Ontario in the past 72 hours is $350. The best round-trip flight deal from Ontario to Thailand found on momondo in the last 72 hours is $516.

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 November 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 8,701 reviews	Search Delta flights
Korean Air	PriceFrom $455	Free Cancellation	Rating 8.4 1,218 reviews	Search Korean Air flights
China Airlines	PriceFrom $720	Free Cancellation	Rating 8.3 856 reviews	Search China Airlines flights
STARLUX Airlines	PriceFrom $731	Free Cancellation	Rating 8.8 410 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.