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Cheap flights from Ontario to Thailand from $376

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Thailand departing on 11/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ontario to Thailand

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
6:45 am - 10:55 pmONT-CNX
26h 10m2 stops
Delta Logo
12:15 am - 10:38 pmCNX-ONT
36h 23m2 stops
$709Delta
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Mon, Mar 9 - Wed, Mar 11
China Airlines Logo
10:50 pm - 10:25 amONT-CNX
20h 35m1 stop
China Airlines Logo
11:25 am - 4:50 pmCNX-ONT
20h 25m1 stop
$734China Airlines
Find Deal
Fri, Jan 9 - Sun, Jan 25
China Airlines Logo
10:50 pm - 9:50 amONT-BKK
20h 00m1 stop
China Airlines Logo
10:55 am - 4:50 pmBKK-ONT
20h 55m1 stop
$738China Airlines
Find Deal
Wed, Nov 12 - Wed, Nov 19
United Airlines Logo
6:00 am - 5:10 amONT-BKK
56h 10m2 stops
United Airlines Logo
3:40 pm - 6:00 pmBKK-ONT
40h 20m2 stops
$748United Airlines
Find Deal
Sun, Mar 1 - Tue, Mar 31
United Airlines Logo
1:53 pm - 11:25 amONT-BKK
30h 32m2 stops
United Airlines Logo
4:55 pm - 12:38 pmBKK-ONT
34h 43m2 stops
$750United Airlines
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Mon, Jan 19 - Mon, Mar 2
Korean Air Logo
6:45 am - 12:55 amONT-BKK
27h 10m2 stops
Korean Air Logo
2:05 am - 10:29 pmBKK-ONT
35h 24m2 stops
$764Korean Air
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Wed, Nov 19 - Tue, Jan 27
STARLUX Airlines Logo
11:10 pm - 12:00 pmONT-BKK
22h 50m1 stop
STARLUX Airlines Logo
1:10 pm - 5:05 pmBKK-ONT
17h 55m1 stop
$779STARLUX Airlines
Find Deal
Mon, Mar 30 - Wed, Apr 8
Lufthansa Logo
6:00 am - 11:25 amONT-BKK
38h 25m2 stops
Lufthansa Logo
4:55 pm - 12:17 pmBKK-ONT
34h 22m2 stops
$795Lufthansa
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Mon, Nov 24 - Sun, Dec 7
Korean Air Logo
6:45 am - 10:55 pmONT-CNX
25h 10m2 stops
Korean Air Logo
12:15 am - 6:18 pmCNX-ONT
33h 03m2 stops
$797Korean Air
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Wed, Nov 12 - Wed, Nov 26
STARLUX Airlines Logo
11:10 pm - 4:40 pmONT-BKK
27h 30m1 stop
STARLUX Airlines Logo
1:10 pm - 5:05 pmBKK-ONT
17h 55m1 stop
$800STARLUX Airlines
Find Deal
Mon, Mar 30 - Wed, Apr 8

China Airlines flights from Ontario to Thailand

Our best China Airlines deals on Ontario to Thailand flight tickets
China Airlines
Jan 9
ONT10:50 pmOntario
20h 35m
1 stop
CNX10:25 amChiang Mai
Jan 25
CNX11:25 amChiang Mai
20h 25m
1 stop
ONT4:50 pmOntario
$734
Find similar
China Airlines
Nov 12
ONT10:50 pmOntario
20h 00m
1 stop
BKK9:50 amBangkok Suvarnabhumi
Nov 19
BKK10:55 amBangkok Suvarnabhumi
20h 55m
1 stop
ONT4:50 pmOntario
$738
Find similar
China Airlines
Jan 7
ONT10:50 pmOntario
20h 00m
1 stop
BKK9:50 amBangkok Suvarnabhumi
Jan 20
BKK2:35 amBangkok Suvarnabhumi
29h 15m
1 stop
ONT4:50 pmOntario
$739
Find similar

STARLUX Airlines flights from Ontario to Thailand

Our best STARLUX Airlines deals on Ontario to Thailand flight tickets
STARLUX Airlines
Mar 30
ONT11:10 pmOntario
22h 50m
1 stop
BKK12:00 pmBangkok Suvarnabhumi
Apr 8
BKK1:10 pmBangkok Suvarnabhumi
17h 55m
1 stop
ONT5:05 pmOntario
$779
Find similar
STARLUX Airlines
Mar 30
ONT11:10 pmOntario
27h 30m
1 stop
BKK4:40 pmBangkok Suvarnabhumi
Apr 8
BKK1:10 pmBangkok Suvarnabhumi
17h 55m
1 stop
ONT5:05 pmOntario
$800
Find similar
STARLUX Airlines
Nov 3
ONT9:45 pmOntario
23h 50m
1 stop
BKK12:35 pmBangkok Suvarnabhumi
Nov 30
BKK5:40 pmBangkok Suvarnabhumi
37h 10m
1 stop
ONT3:50 pmOntario
$1,097
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Thailand that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated October 29, 2025.
Use the filters below to find and compare flights from Ontario to Thailand that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 3/9

6:45 am-10:55 pm

2 stops26h 10m

Chiang Mai

Wed 3/11

12:15 am-10:38 pm

2 stops36h 23m

$709

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Fri 1/9

10:50 pm-10:25 am

1 stop20h 35m

Chiang Mai

Sun 1/25

11:25 am-4:50 pm

1 stop20h 25m

$734

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 11/12

10:50 pm-9:50 am

1 stop20h 00m

Bangkok Suvarnabhumi

Wed 11/19

10:55 am-4:50 pm

1 stop20h 55m

$738

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 3/1

6:00 am-5:10 am

2 stops56h 10m

Bangkok Suvarnabhumi

Tue 3/31

3:40 pm-6:00 pm

2 stops40h 20m

$748

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 1/19

1:53 pm-11:25 am

2 stops30h 32m

Bangkok Suvarnabhumi

Mon 3/2

4:55 pm-12:38 pm

2 stops34h 43m

$750

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 11/19

6:45 am-12:55 am

2 stops27h 10m

Bangkok Suvarnabhumi

Tue 1/27

2:05 am-10:29 pm

2 stops35h 24m

$764

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 3/30

11:10 pm-12:00 pm

1 stop22h 50m

Bangkok Suvarnabhumi

Wed 4/8

1:10 pm-5:05 pm

1 stop17h 55m

$779

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 11/24

6:00 am-11:25 am

2 stops38h 25m

Bangkok Suvarnabhumi

Sun 12/7

4:55 pm-12:17 pm

2 stops34h 22m

$795

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 11/12

6:45 am-10:55 pm

2 stops25h 10m

Chiang Mai

Wed 11/26

12:15 am-6:18 pm

2 stops33h 03m

$797

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 3/30

11:10 pm-4:40 pm

1 stop27h 30m

Bangkok Suvarnabhumi

Wed 4/8

1:10 pm-5:05 pm

1 stop17h 55m

$800

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Thailand from

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

What is the cheapest month to fly to Thailand?

The month of August is, on average, the cheapest month to fly to Thailand from Ontario, with most prices found around $806. If you are unable to visit Thailand during the month of August, then departing from Ontario during the month October is also very affordable. Most momondo users find prices during this month for around $823.

What is the cheapest day to depart on your flight to Thailand?

The cheapest day to depart on your flight to Thailand is on a Wednesday when prices can be found for as low as $884. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Thailand is Friday, with ticket prices averaging around $1,065.

What is the cheapest time of day to depart on your flight to Thailand?

Flying to Thailand from Ontario in the morning is the least expensive time of day to depart. momondo users have found prices as low as $911 when looking at flights departing in the morning. In contrast, the most expensive time of day to depart to Thailand is in the afternoon when prices are around $1,279.

How far in advance should I book a flight 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 $1,016 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 $770 on momondo.

Can stopping save me money on Ontario to Thailand flights?

You could potentially save up to 7% 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

Direct flights

None
There are no direct flights from Ontario to Thailand. There are no popular flight routes from Ontario to Thailand.
Search flight deals

  • 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?

  • 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
Korean AirPriceFrom $732Free CancellationRating
8.4
1,155 reviews
Search Korean Air flights
China AirlinesPriceFrom $764Free CancellationRating
8.3
776 reviews
Search China Airlines flights
United AirlinesPriceFrom $778Free CancellationRating
7.4
9,001 reviews
Search United Airlines flights
STARLUX AirlinesPriceFrom $787Free CancellationRating
8.9
219 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.

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