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Cheap flights from Ontario to Bangkok from $360

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 Bangkok departing on 3/15. 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 Bangkok

Cheap round-trip flights

Enter your travel dates to find the best prices.
China Airlines Logo
11:50 pm - 1:05 pmONT-BKK
23h 15m1 stop
China Airlines Logo
2:35 am - 4:50 pmBKK-ONT
29h 15m1 stop
$744China Airlines
Find Deal
Wed, Oct 29 - Wed, Nov 5
China Airlines Logo
11:50 pm - 1:35 amONT-BKK
35h 45m1 stop
China Airlines Logo
2:05 pm - 5:50 pmBKK-ONT
17h 45m1 stop
$745China Airlines
Find Deal
Thu, Mar 12 - Tue, Mar 24
China Airlines Logo
11:50 pm - 4:45 pmONT-BKK
26h 55m1 stop
China Airlines Logo
2:05 pm - 5:50 pmBKK-ONT
17h 45m1 stop
$746China Airlines
Find Deal
Fri, Mar 13 - Fri, Mar 20
United Airlines Logo
6:00 am - 11:25 amONT-BKK
38h 25m2 stops
United Airlines Logo
4:55 pm - 12:37 pmBKK-ONT
34h 42m2 stops
$750United Airlines
Find Deal
Tue, Nov 4 - Sun, Nov 9
United Airlines Logo
6:00 am - 11:25 amONT-BKK
38h 25m2 stops
United Airlines Logo
4:55 pm - 10:53 pmBKK-ONT
20h 58m2 stops
$756United Airlines
Find Deal
Tue, Nov 25 - Fri, Jan 30
Delta Logo
6:45 am - 12:45 amONT-BKK
27h 00m2 stops
Delta Logo
12:55 am - 5:07 pmBKK-ONT
31h 12m2 stops
$759Delta
Find Deal
Mon, Dec 1 - Sun, Dec 14
Korean Air Logo
7:35 am - 12:45 amONT-BKK
27h 10m2 stops
Korean Air Logo
12:55 am - 5:10 pmBKK-ONT
31h 15m2 stops
$764Korean Air
Find Deal
Tue, Oct 28 - Sun, Nov 2
Delta Logo
6:45 am - 1:25 pmONT-BKK
39h 40m2 stops
Delta Logo
9:50 am - 10:40 pmBKK-ONT
26h 50m2 stops
$780Delta
Find Deal
Thu, Nov 27 - Tue, Apr 21
Korean Air Logo
6:45 am - 9:30 pmONT-BKK
23h 45m2 stops
Korean Air Logo
2:05 am - 10:47 pmBKK-ONT
35h 42m2 stops
$785Korean Air
Find Deal
Wed, Nov 12 - Tue, Dec 16
STARLUX Airlines Logo
11:10 pm - 12:00 pmONT-BKK
22h 50m1 stop
STARLUX Airlines Logo
5:50 pm - 5:05 pmBKK-ONT
37h 15m1 stop
$810STARLUX Airlines
Find Deal
Mon, Mar 30 - Sun, Apr 26

Korean Air flights from Ontario to Bangkok

Our best Korean Air deals on Ontario to Bangkok flight tickets
Korean Air
Oct 28
ONT7:35 amOntario
27h 10m
2 stops
BKK12:45 amBangkok Suvarnabhumi
Nov 4
BKK9:40 amBangkok Suvarnabhumi
22h 30m
2 stops
ONT5:10 pmOntario
$764
Find similar
Korean Air
Nov 12
ONT6:45 amOntario
25h 35m
2 stops
BKK11:20 pmBangkok Suvarnabhumi
Dec 16
BKK12:55 amBangkok Suvarnabhumi
31h 12m
2 stops
ONT5:07 pmOntario
$785
Find similar
Korean Air
Feb 8
ONT6:45 amOntario
23h 45m
2 stops
BKK9:30 pmBangkok Suvarnabhumi
Feb 21
BKK11:15 pmBangkok Suvarnabhumi
31h 05m
2 stops
ONT3:20 pmOntario
$813
Find similar

China Airlines flights from Ontario to Bangkok

Our best China Airlines deals on Ontario to Bangkok flight tickets
China Airlines
Oct 29
ONT11:50 pmOntario
23h 15m
1 stop
BKK1:05 pmBangkok Suvarnabhumi
Nov 5
BKK2:35 amBangkok Suvarnabhumi
29h 15m
1 stop
ONT4:50 pmOntario
$744
Find similar
China Airlines
Mar 12
ONT11:50 pmOntario
35h 45m
1 stop
BKK1:35 amBangkok Suvarnabhumi
Mar 24
BKK2:05 pmBangkok Suvarnabhumi
17h 45m
1 stop
ONT5:50 pmOntario
$745
Find similar
China Airlines
Mar 13
ONT11:50 pmOntario
26h 55m
1 stop
BKK4:45 pmBangkok Suvarnabhumi
Mar 20
BKK2:05 pmBangkok Suvarnabhumi
17h 45m
1 stop
ONT5:50 pmOntario
$746
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Bangkok 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 16, 2025.
Use the filters below to find and compare flights from Ontario to Bangkok that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 10/29

11:50 pm-1:05 pm

1 stop23h 15m

Bangkok Suvarnabhumi

Wed 11/5

2:35 am-4:50 pm

1 stop29h 15m

$744

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 3/12

11:50 pm-1:35 am

1 stop35h 45m

Bangkok Suvarnabhumi

Tue 3/24

2:05 pm-5:50 pm

1 stop17h 45m

$745

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Fri 3/13

11:50 pm-4:45 pm

1 stop26h 55m

Bangkok Suvarnabhumi

Fri 3/20

2:05 pm-5:50 pm

1 stop17h 45m

$746

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 11/4

6:00 am-11:25 am

2 stops38h 25m

Bangkok Suvarnabhumi

Sun 11/9

4:55 pm-12:37 pm

2 stops34h 42m

$750

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 11/25

6:00 am-11:25 am

2 stops38h 25m

Bangkok Suvarnabhumi

Fri 1/30

4:55 pm-10:53 pm

2 stops20h 58m

$756

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 12/1

6:45 am-12:45 am

2 stops27h 00m

Bangkok Suvarnabhumi

Sun 12/14

12:55 am-5:07 pm

2 stops31h 12m

$759

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 10/28

7:35 am-12:45 am

2 stops27h 10m

Bangkok Suvarnabhumi

Sun 11/2

12:55 am-5:10 pm

2 stops31h 15m

$764

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 11/27

6:45 am-1:25 pm

2 stops39h 40m

Bangkok Suvarnabhumi

Tue 4/21

9:50 am-10:40 pm

2 stops26h 50m

$780

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 11/12

6:45 am-9:30 pm

2 stops23h 45m

Bangkok Suvarnabhumi

Tue 12/16

2:05 am-10:47 pm

2 stops35h 42m

$785

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 3/30

11:10 pm-12:00 pm

1 stop22h 50m

Bangkok Suvarnabhumi

Sun 4/26

5:50 pm-5:05 pm

1 stop37h 15m

$810

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 Bangkok from

How to get the cheapest flight ticket from Ontario to Bangkok

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 Bangkok?

If you aren’t able to travel during the month of August, then book flights to Bangkok from Ontario during October instead. Flights to Bangkok in October, while not as cheap as those in August, still average around $823.

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

On average, the least expensive day to fly to Bangkok from Ontario is on a Sunday. momondo users have found tickets for Sunday departures for as low as $699. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Ontario to Bangkok on a Monday will generally be more expensive and average around $896. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

According to our data, the cheapest time of day to fly to Bangkok is in the evening. momondo users have found flights departing from Ontario to Bangkok in the evening for as low as $741. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets at noon because they tend to be around $922. Of course, these prices can vary depending on the time of year and what airport you fly to.

How far in advance should I book a flight to Bangkok?

You are more likely to see cheaper flights to Bangkok from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Bangkok for around $1,020 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bangkok from Ontario for as low as $814 on momondo.

Cheap Ontario to Bangkok flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Bangkok

Direct flights

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

  • How far is Ontario to Bangkok by plane?

    A flight from Ontario to Bangkok will travel around 8282.1 mi. In terms of flight time, this usually takes a little over 20h 00m.

  • When did momondo last update prices for flights from Ontario Airport to Bangkok?

    Prices for flights from Ontario Airport to Bangkok refresh daily.

  • How many operators does momondo search for flights from Ontario Airport to Bangkok?

  • How old do you have to be to fly from Ontario Airport to Bangkok?

    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 Bangkok.

  • What documentation or ID do you need to fly to Bangkok?

    The travel and health documents you'll need for your trip to Bangkok 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 Bangkok. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Ontario to Bangkok

Compare and see reviews for airlines that fly from Ontario to Bangkok with momondo
Airline
Rating
Free Cancellation
Price
Korean AirPriceFrom $732Free CancellationRating
8.4
1,149 reviews
Search Korean Air flights
China AirlinesPriceFrom $768Free CancellationRating
8.3
768 reviews
Search China Airlines flights
United AirlinesPriceFrom $778Free CancellationRating
7.4
8,977 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 Bangkok?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Bangkok for you.

Can I find flights from Ontario to Bangkok with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Bangkok from Ontario with this policy.

How can momondo help me find flights from Ontario to Bangkok?

Once all potential Ontario to Bangkok flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to Bangkok right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Ontario to Bangkok now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Bangkok and let you know when they change.

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Find better results for your trip to Thailand

Fly into one of these airports located in Bangkok

Airports listed have a maximum distance of 15.4 mi from Bangkok
Bangkok Suvarnabhumi Airport
Bangkok Don Mueang Intl Airport