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 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.

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

Delta, United Airlines, and Korean Air are the most popular carriers operating 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.

$372 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.

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

26h 25m2 stops Seattle/Tacoma Intl Incheon Intl

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

31h 52m2 stops Incheon Intl Seattle/Tacoma Intl

$773Korean Air

Sun, Oct 25 - Fri, Nov 6

7:00 am - 10:45 pmONT Ontario-CNX Chiang Mai

24h 45m2 stops Seattle/Tacoma Intl Incheon Intl

12:20 am - 1:57 pmCNX Chiang Mai-ONT Ontario

28h 37m2 stops Incheon Intl Seattle/Tacoma Intl

$786Korean Air

Wed, Jan 27 - Mon, Feb 8

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

47h 30m2 stops Seattle/Tacoma Intl Incheon Intl

11:15 pm - 4:58 pmBKK Bangkok Suvarnabhumi-ONT Ontario

32h 43m2 stops Incheon Intl Seattle/Tacoma Intl

$822Delta

Mon, Dec 7 - Tue, Dec 22

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

47h 30m2 stops Seattle/Tacoma Intl Incheon Intl

1:05 am - 4:58 pmBKK Bangkok Suvarnabhumi-ONT Ontario

30h 53m2 stops Incheon Intl Seattle/Tacoma Intl

$822Delta

Mon, Dec 7 - Sun, Dec 20

7:25 am - 12:20 amONT Ontario-BKK Bangkok Suvarnabhumi

25h 55m2 stops San Francisco Tokyo Narita

9:10 am - 5:35 pmBKK Bangkok Suvarnabhumi-ONT Ontario

23h 25m2 stops Tokyo Haneda San Francisco

$888United Airlines

Wed, Jan 13 - Wed, Jan 27

7:25 am - 12:20 amONT Ontario-BKK Bangkok Suvarnabhumi

25h 55m2 stops San Francisco Tokyo Narita

9:10 am - 3:27 pmBKK Bangkok Suvarnabhumi-ONT Ontario

21h 17m2 stops Tokyo Haneda San Francisco

$888United Airlines

Mon, Jan 25 - Tue, Feb 16

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

$959STARLUX Airlines

Mon, Nov 23 - Tue, Dec 8

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

$960STARLUX Airlines

Mon, Nov 23 - Tue, Dec 8

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

23h 15m1 stop Taipei City Taiwan Taoyuan Intl

2:05 pm - 6:05 pmBKK Bangkok Suvarnabhumi-ONT Ontario

18h 00m1 stop Taipei City Taiwan Taoyuan Intl

$997China Airlines

Wed, Mar 10 - Thu, Mar 25

10:50 pm - 1:35 amONT Ontario-BKK Bangkok Suvarnabhumi

35h 45m1 stop Taipei City Taiwan Taoyuan Intl

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

38h 15m1 stop Taipei City Taiwan Taoyuan Intl

$1,001China Airlines

Thu, Nov 5 - Thu, Nov 12

Cheap last minute flights

Enter your travel dates to find the best prices.

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

28h 55m2 stops Denver Intl Tokyo Narita

9:10 am - 8:15 pmBKK Bangkok Suvarnabhumi-ONT Ontario

25h 05m2 stops Tokyo Haneda San Francisco

$900United Airlines

Wed, Oct 21 - Thu, Oct 29

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

28h 55m2 stops Denver Intl Tokyo Narita

9:10 am - 6:01 pmBKK Bangkok Suvarnabhumi-ONT Ontario

22h 51m2 stops Tokyo Haneda San Francisco

$900United Airlines

Wed, Oct 21 - Wed, Oct 28

6:00 pm - 11:35 pmONT Ontario-BKK Bangkok Suvarnabhumi

39h 35m2 stops Seattle/Tacoma Intl Incheon Intl

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

27h 53m2 stops Incheon Intl Seattle/Tacoma Intl

$913Korean Air

Mon, Oct 19 - Tue, Nov 3

6:00 pm - 11:35 pmONT Ontario-BKK Bangkok Suvarnabhumi

39h 35m2 stops Seattle/Tacoma Intl Incheon Intl

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

35h 38m2 stops Incheon Intl Seattle/Tacoma Intl

$913Korean Air

Mon, Oct 19 - Thu, Oct 29

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

27h 10m1 stop Taipei City Taiwan Taoyuan Intl

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

17h 10m1 stop Taipei City Taiwan Taoyuan Intl

$971STARLUX Airlines

Sat, Oct 17 - Wed, Nov 4

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

22h 30m1 stop Taipei City Taiwan Taoyuan Intl

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

17h 10m1 stop Taipei City Taiwan Taoyuan Intl

$971STARLUX Airlines

Mon, Oct 19 - Mon, Nov 2

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

22h 00m1 stop Taipei City Taiwan Taoyuan Intl

2:05 pm - 6:05 pmBKK Bangkok Suvarnabhumi-ONT Ontario

18h 00m1 stop Taipei City Taiwan Taoyuan Intl

$1,016China Airlines

Mon, Oct 19 - Wed, Oct 28

12:10 am - 1:25 amONT Ontario-BKK Bangkok Suvarnabhumi

35h 15m1 stop Taipei City Taiwan Taoyuan Intl

2:35 am - 5:05 pmBKK Bangkok Suvarnabhumi-ONT Ontario

29h 30m1 stop Taipei City Taiwan Taoyuan Intl

$1,016China Airlines

Mon, Oct 19 - Mon, Nov 23

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

25h 25m2 stops Seattle/Tacoma Intl Incheon Intl

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

21h 22m2 stops Incheon Intl Seattle/Tacoma Intl

$1,228Delta

Tue, Oct 20 - Wed, Oct 28

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

27h 15m2 stops Seattle/Tacoma Intl Incheon Intl

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

21h 22m2 stops Incheon Intl Seattle/Tacoma Intl

$1,228Delta

Wed, Oct 21 - Wed, Oct 28

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Delta flights from Ontario to Thailand

Our best Delta deals on Ontario to Thailand flight tickets

Delta

Dec 7

ONT7:00 amOntario

47h 30m

2 stops

BKK9:30 pmBangkok Suvarnabhumi

Dec 22

BKK1:05 amBangkok Suvarnabhumi

30h 53m

2 stops

ONT4:58 pmOntario

$822

Delta

Dec 6

ONT5:04 pmOntario

53h 21m

2 stops

BKK1:25 pmBangkok Suvarnabhumi

Dec 21

BKK1:05 amBangkok Suvarnabhumi

30h 53m

2 stops

ONT4:58 pmOntario

$828

Delta

Jan 30

ONT6:00 amOntario

24h 30m

2 stops

BKK9:30 pmBangkok Suvarnabhumi

Mar 1

BKK11:15 pmBangkok Suvarnabhumi

31h 57m

2 stops

ONT4:12 pmOntario

$830

Korean Air flights from Ontario to Thailand

Our best Korean Air deals on Ontario to Thailand flight tickets

Korean Air

Oct 25

ONT6:20 amOntario

26h 25m

2 stops

CNX10:45 pmChiang Mai

Nov 6

CNX12:20 amChiang Mai

31h 52m

2 stops

ONT5:12 pmOntario

$773

Korean Air

Jan 26

ONT7:00 amOntario

24h 45m

2 stops

CNX10:45 pmChiang Mai

Feb 9

CNX12:20 amChiang Mai

37h 23m

2 stops

ONT10:43 pmOntario

$786

Korean Air

Jan 28

ONT3:30 pmOntario

40h 15m

2 stops

CNX10:45 pmChiang Mai

Feb 8

CNX12:20 amChiang Mai

37h 23m

2 stops

ONT10:43 pmOntario

$792

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Sun 10/25

6:20 am-10:45 pm

2 stops26h 25m

Chiang Mai

Fri 11/6

12:20 am-5:12 pm

2 stops31h 52m

$773

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Wed 1/27

7:00 am-10:45 pm

2 stops24h 45m

Chiang Mai

Mon 2/8

12:20 am-1:57 pm

2 stops28h 37m

$786

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 12/7

7:00 am-9:30 pm

2 stops47h 30m

Bangkok Suvarnabhumi

Tue 12/22

11:15 pm-4:58 pm

2 stops32h 43m

$822

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 12/7

7:00 am-9:30 pm

2 stops47h 30m

Bangkok Suvarnabhumi

Sun 12/20

1:05 am-4:58 pm

2 stops30h 53m

$822

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 1/13

7:25 am-12:20 am

2 stops25h 55m

Bangkok Suvarnabhumi

Wed 1/27

9:10 am-5:35 pm

2 stops23h 25m

$888

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 1/25

7:25 am-12:20 am

2 stops25h 55m

Bangkok Suvarnabhumi

Tue 2/16

9:10 am-3:27 pm

2 stops21h 17m

$888

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

Tue 12/8

1:45 pm-3:55 pm

1 stop17h 10m

$959

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 11/23

9:45 pm-12:35 pm

1 stop23h 50m

Bangkok Suvarnabhumi

Tue 12/8

1:45 pm-3:55 pm

1 stop17h 10m

$960

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 3/10

10:50 pm-1:05 pm

1 stop23h 15m

Bangkok Suvarnabhumi

Thu 3/25

2:05 pm-6:05 pm

1 stop18h 00m

$997

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Thu 11/5

10:50 pm-1:35 am

1 stop35h 45m

Bangkok Suvarnabhumi

Thu 11/12

5:50 pm-5:05 pm

1 stop38h 15m

$1,001

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 $772. 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 $789.

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 $976 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	$372
Fastest flight time	23h 15m
Direct flights	None

The best one-way flight to Thailand from Ontario in the past 72 hours is $372. The best round-trip flight deal from Ontario to Thailand found on momondo in the last 72 hours is $773.

The fastest flight from Ontario to Thailand takes 23h 15m

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 8,656 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 8.2 850 reviews	Search China Airlines flights
STARLUX Airlines	PriceFrom $731	Free Cancellation	Rating 8.7 400 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.