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 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, Korean Air, and United Airlines 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 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.

$394 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 - 5:19 pmBKK Bangkok Suvarnabhumi-ONT Ontario

28h 44m2 stops Incheon Intl Seattle/Tacoma Intl

$775Korean Air

Sun, Sep 13 - Wed, Sep 16

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

25h 45m2 stops Seattle/Tacoma Intl Incheon Intl

11:30 pm - 10:40 pmBKK Bangkok Suvarnabhumi-ONT Ontario

37h 10m2 stops Incheon Intl Seattle/Tacoma Intl

$782Korean Air

Fri, Sep 11 - Tue, Sep 15

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

35h 45m1 stop Taipei City Taiwan Taoyuan Intl

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

29h 30m1 stop Taipei City Taiwan Taoyuan Intl

$810China Airlines

Mon, Nov 2 - Wed, Nov 18

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

19h 00m1 stop Taipei City Taiwan Taoyuan Intl

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

21h 50m1 stop Taipei City Taiwan Taoyuan Intl

$811China Airlines

Thu, Sep 10 - Tue, Sep 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

$823Delta

Mon, Dec 7 - Sun, Jan 24

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

$823Delta

Sun, Dec 6 - Sat, Feb 6

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

27h 35m2 stops Seattle/Tacoma Intl Incheon Intl

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

34h 05m2 stops Incheon Intl Seattle/Tacoma Intl

$830Multiple Airlines

Tue, Sep 15 - Fri, Sep 18

10:45 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

$833STARLUX Airlines

Fri, Oct 30 - Mon, Nov 2

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

$833STARLUX Airlines

Mon, Oct 19 - Wed, Nov 4

6:53 pm - 5:10 amONT Ontario-BKK Bangkok Suvarnabhumi

43h 17m2 stops San Francisco Tokyo Haneda

9:10 am - 8:26 pmBKK Bangkok Suvarnabhumi-ONT Ontario

26h 16m2 stops Tokyo Haneda San Francisco

$858United Airlines

Sun, Jan 10 - Fri, Jan 22

Cheap last minute flights

Enter your travel dates to find the best prices.

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

$808Korean Air

Thu, Sep 3 - Tue, Sep 15

11:56 am - 11:35 pmONT Ontario-BKK Bangkok Suvarnabhumi

45h 39m2 stops Seattle/Tacoma Intl Incheon Intl

2:35 am - 12:14 pmBKK Bangkok Suvarnabhumi-ONT Ontario

47h 39m2 stops Incheon Intl Salt Lake City

$815Delta

Thu, Sep 3 - Tue, Sep 15

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

29h 05m2 stops Salt Lake City Incheon Intl

2:35 am - 11:34 pmBKK Bangkok Suvarnabhumi-ONT Ontario

34h 59m2 stops Incheon Intl Salt Lake City

$823Delta

Tue, Sep 1 - Thu, Sep 3

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

27h 15m2 stops Seattle/Tacoma Intl Incheon Intl

2:35 am - 5:21 pmBKK Bangkok Suvarnabhumi-ONT Ontario

28h 46m2 stops Incheon Intl Seattle/Tacoma Intl

$828Korean Air

Tue, Sep 1 - Thu, Sep 3

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

19h 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

Mon, Aug 31 - Thu, Oct 1

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

$831China Airlines

Wed, Sep 2 - Mon, Sep 7

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

$833STARLUX Airlines

Wed, Sep 2 - Sun, Sep 13

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

$833STARLUX Airlines

Fri, Sep 4 - Wed, Sep 9

9:01 am - 11:55 pmONT Ontario-BKK Bangkok Suvarnabhumi

24h 54m2 stops San Francisco Tokyo Narita

9:35 am - 8:01 pmBKK Bangkok Suvarnabhumi-ONT Ontario

24h 26m2 stops Tokyo Haneda San Francisco

$861United Airlines

Tue, Sep 1 - Tue, Sep 8

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

$862United Airlines

Wed, Sep 2 - Sun, Sep 13

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Delta flights from Ontario to Thailand

Our best Delta deals on Ontario to Thailand flight tickets

Delta

Sep 3

ONT11:56 amOntario

45h 39m

2 stops

BKK11:35 pmBangkok Suvarnabhumi

Sep 15

BKK2:35 amBangkok Suvarnabhumi

47h 39m

2 stops

ONT12:14 pmOntario

$815

Delta

Sep 1

ONT6:00 amOntario

29h 05m

2 stops

BKK1:05 amBangkok Suvarnabhumi

Sep 3

BKK2:35 amBangkok Suvarnabhumi

34h 59m

2 stops

ONT11:34 pmOntario

$823

Delta

Nov 30

ONT5:59 pmOntario

39h 46m

2 stops

BKK12:45 amBangkok Suvarnabhumi

Dec 13

BKK9:40 amBangkok Suvarnabhumi

29h 18m

2 stops

ONT11:58 pmOntario

$829

United Airlines flights from Ontario to Thailand

Our best United Airlines deals on Ontario to Thailand flight tickets

United Airlines

Jan 10

ONT6:53 pmOntario

43h 17m

2 stops

BKK5:10 amBangkok Suvarnabhumi

Jan 18

BKK9:10 amBangkok Suvarnabhumi

26h 16m

2 stops

ONT8:26 pmOntario

$858

United Airlines

Sep 1

ONT9:01 amOntario

24h 54m

2 stops

BKK11:55 pmBangkok Suvarnabhumi

Sep 8

BKK9:35 amBangkok Suvarnabhumi

24h 26m

2 stops

ONT8:01 pmOntario

$861

United Airlines

Oct 19

ONT9:25 amOntario

24h 30m

2 stops

BKK11:55 pmBangkok Suvarnabhumi

Nov 4

BKK7:10 amBangkok Suvarnabhumi

23h 23m

2 stops

ONT3:33 pmOntario

$862

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sun 9/13

6:00 am-9:45 pm

2 stops25h 45m

Bangkok Suvarnabhumi

Wed 9/16

2:35 am-5:19 pm

2 stops28h 44m

$775

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Fri 9/11

6:00 am-9:45 pm

2 stops25h 45m

Bangkok Suvarnabhumi

Tue 9/15

11:30 pm-10:40 pm

2 stops37h 10m

$782

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 11/2

10:50 pm-1:35 am

1 stop35h 45m

Bangkok Suvarnabhumi

Wed 11/18

2:35 am-5:05 pm

1 stop29h 30m

$810

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Thu 9/10

12:45 am-9:45 am

1 stop19h 00m

Bangkok Suvarnabhumi

Tue 9/15

10:50 am-6:40 pm

1 stop21h 50m

$811

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Mon 12/7

6:00 am-10:55 pm

2 stops25h 55m

Chiang Mai

Sun 1/24

12:15 am-10:43 pm

2 stops37h 28m

$823

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Sun 12/6

6:00 am-10:55 pm

2 stops25h 55m

Chiang Mai

Sat 2/6

12:15 am-10:43 pm

2 stops37h 28m

$823

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 9/15

6:00 am-11:35 pm

2 stops27h 35m

Bangkok Suvarnabhumi

Fri 9/18

2:35 am-10:40 pm

2 stops34h 05m

$830

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Fri 10/30

10:45 pm-12:35 pm

1 stop23h 50m

Bangkok Suvarnabhumi

Mon 11/2

1:45 pm-3:55 pm

1 stop17h 10m

$833

Quickest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 10/19

11:30 pm-12:00 pm

1 stop22h 30m

Bangkok Suvarnabhumi

Wed 11/4

1:45 pm-3:55 pm

1 stop17h 10m

$833

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sun 1/10

6:53 pm-5:10 am

2 stops43h 17m

Bangkok Suvarnabhumi

Fri 1/22

9:10 am-8:26 pm

2 stops26h 16m

$858

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 $787.

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 $796 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	$394
Fastest flight time	22h 30m
Direct flights	None

The best one-way flight to Thailand from Ontario in the past 72 hours is $394. The best round-trip flight deal from Ontario to Thailand found on momondo in the last 72 hours is $775.

The fastest flight from Ontario to Thailand takes 22h 30m

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 8,536 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 8.3 844 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.