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Cheap flights from Ontario to Thailand from $366

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 11/29. 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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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
$690Delta
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Mon, Mar 16 - Wed, Mar 18
United Airlines Logo
6:00 am - 9:45 amONT-BKK
37h 45m2 stops
United Airlines Logo
9:35 am - 11:06 pmBKK-ONT
27h 31m2 stops
$731United Airlines
Find Deal
Wed, Apr 15 - Thu, Apr 30
China Airlines Logo
10:50 pm - 1:35 amONT-BKK
35h 45m1 stop
China Airlines Logo
10:55 am - 4:50 pmBKK-ONT
20h 55m1 stop
$732China Airlines
Find Deal
Thu, Jan 15 - Thu, Jan 29
Delta Logo
6:40 am - 12:55 amONT-BKK
27h 15m2 stops
Delta Logo
2:05 am - 11:54 pmBKK-ONT
36h 49m2 stops
$734Delta
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Thu, Dec 4 - Mon, Dec 22
China Airlines Logo
10:50 pm - 1:35 amONT-BKK
35h 45m1 stop
China Airlines Logo
10:55 am - 4:50 pmBKK-ONT
20h 55m1 stop
$735China Airlines
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Fri, Feb 6 - Fri, Feb 20
United Airlines Logo
1:53 pm - 11:25 amONT-BKK
54h 32m2 stops
United Airlines Logo
9:35 am - 5:47 pmBKK-ONT
46h 12m2 stops
$736United Airlines
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Thu, Jan 15 - Tue, May 26
Korean Air Logo
6:45 am - 1:25 pmONT-BKK
39h 40m2 stops
Korean Air Logo
11:15 pm - 5:07 pmBKK-ONT
32h 52m2 stops
$739Korean Air
Find Deal
Mon, Dec 1 - Sun, Dec 7
Korean Air Logo
6:38 am - 10:55 pmONT-CNX
25h 17m2 stops
Korean Air Logo
12:15 am - 1:56 pmCNX-ONT
28h 41m2 stops
$745Korean Air
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Thu, Jan 1 - Mon, Feb 9
Multiple Airlines Logo
12:10 am - 10:20 amONT-CNX
20h 10m1 stop
Multiple Airlines Logo
10:10 am - 6:00 pmCNX-ONT
21h 50m2 stops
$865Multiple Airlines
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Sun, May 3 - Tue, May 12
Multiple Airlines Logo
7:00 am - 10:10 pmONT-HKT
25h 10m2 stops
Multiple Airlines Logo
11:25 pm - 5:16 pmHKT-ONT
31h 51m2 stops
$911Multiple Airlines
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Wed, May 13 - Sun, May 31

United Airlines flights from Ontario to Thailand

Our best United Airlines deals on Ontario to Thailand flight tickets
United Airlines
Apr 15
ONT6:00 amOntario
37h 45m
2 stops
BKK9:45 amBangkok Suvarnabhumi
Apr 30
BKK9:35 amBangkok Suvarnabhumi
27h 31m
2 stops
ONT11:06 pmOntario
$731
Find similar
United Airlines
Jan 15
ONT1:53 pmOntario
54h 32m
2 stops
BKK11:25 amBangkok Suvarnabhumi
May 26
BKK9:35 amBangkok Suvarnabhumi
46h 12m
2 stops
ONT5:47 pmOntario
$736
Find similar
United Airlines
Feb 24
ONT6:00 amOntario
32h 10m
2 stops
BKK5:10 amBangkok Suvarnabhumi
Mar 10
BKK4:55 pmBangkok Suvarnabhumi
38h 46m
2 stops
ONT5:41 pmOntario
$742
Find similar

China Airlines flights from Ontario to Thailand

Our best China Airlines deals on Ontario to Thailand flight tickets
China Airlines
Jan 15
ONT10:50 pmOntario
35h 45m
1 stop
BKK1:35 amBangkok Suvarnabhumi
Jan 29
BKK10:55 amBangkok Suvarnabhumi
20h 55m
1 stop
ONT4:50 pmOntario
$732
Find similar
China Airlines
Nov 27
ONT10:50 pmOntario
23h 15m
1 stop
BKK1:05 pmBangkok Suvarnabhumi
Dec 4
BKK10:55 amBangkok Suvarnabhumi
20h 55m
1 stop
ONT4:50 pmOntario
$733
Find similar
China Airlines
Nov 27
ONT10:50 pmOntario
23h 15m
1 stop
BKK1:05 pmBangkok Suvarnabhumi
Dec 7
BKK5:50 pmBangkok Suvarnabhumi
38h 00m
1 stop
ONT4:50 pmOntario
$734
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 November 21, 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 3/16

6:45 am-10:55 pm

2 stops26h 10m

Chiang Mai

Wed 3/18

12:15 am-10:38 pm

2 stops36h 23m

$690

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 4/15

6:00 am-9:45 am

2 stops37h 45m

Bangkok Suvarnabhumi

Thu 4/30

9:35 am-11:06 pm

2 stops27h 31m

$731

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 1/15

10:50 pm-1:35 am

1 stop35h 45m

Bangkok Suvarnabhumi

Thu 1/29

10:55 am-4:50 pm

1 stop20h 55m

$732

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 12/4

6:40 am-12:55 am

2 stops27h 15m

Bangkok Suvarnabhumi

Mon 12/22

2:05 am-11:54 pm

2 stops36h 49m

$734

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Fri 2/6

10:50 pm-1:35 am

1 stop35h 45m

Bangkok Suvarnabhumi

Fri 2/20

10:55 am-4:50 pm

1 stop20h 55m

$735

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 1/15

1:53 pm-11:25 am

2 stops54h 32m

Bangkok Suvarnabhumi

Tue 5/26

9:35 am-5:47 pm

2 stops46h 12m

$736

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 12/1

6:45 am-1:25 pm

2 stops39h 40m

Bangkok Suvarnabhumi

Sun 12/7

11:15 pm-5:07 pm

2 stops32h 52m

$739

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Thu 1/1

6:38 am-10:55 pm

2 stops25h 17m

Chiang Mai

Mon 2/9

12:15 am-1:56 pm

2 stops28h 41m

$745

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Sun 5/3

12:10 am-10:20 am

1 stop20h 10m

Chiang Mai

Tue 5/12

10:10 am-6:00 pm

2 stops21h 50m

$865

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

Wed 5/13

7:00 am-10:10 pm

2 stops25h 10m

Phuket City

Sun 5/31

11:25 pm-5:16 pm

2 stops31h 51m

$911

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 $807. 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 $808.

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 $1,006 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 $762 on momondo.

Can stopping save me money on Ontario to Thailand flights?

You could potentially save up to 1% 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
1,170 reviews
Search Korean Air flights
China AirlinesPriceFrom $756Free CancellationRating
8.3
782 reviews
Search China Airlines flights
United AirlinesPriceFrom $778Free CancellationRating
7.4
9,029 reviews
Search United Airlines flights
STARLUX AirlinesPriceFrom $787Free CancellationRating
8.9
232 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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