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Cheap flights from Ontario to Bangkok from $328

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 4/27. 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 Bangkok

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
7:00 am - 11:40 pm
ONT
-
BKK
26h 40m
2 stops
Delta Logo
9:50 am - 5:10 pm
BKK
-
ONT
21h 20m
2 stops
$661Delta
Sun, Apr 19 - Thu, May 28
Korean Air Logo
6:00 am - 12:45 am
ONT
-
BKK
28h 45m
2 stops
Korean Air Logo
2:05 am - 5:13 pm
BKK
-
ONT
29h 08m
2 stops
$666Korean Air
Tue, Mar 10 - Mon, Mar 16
Korean Air Logo
7:00 am - 1:35 pm
ONT
-
BKK
40h 35m
2 stops
Korean Air Logo
11:30 pm - 5:10 pm
BKK
-
ONT
31h 40m
2 stops
$671Korean Air
Mon, Apr 13 - Thu, May 14
Delta Logo
7:00 am - 11:40 pm
ONT
-
BKK
26h 40m
2 stops
Delta Logo
9:50 am - 10:19 pm
BKK
-
ONT
26h 29m
2 stops
$711Delta
Tue, May 5 - Sat, May 23
Delta Logo
7:00 am - 11:40 pm
ONT
-
BKK
26h 40m
2 stops
Delta Logo
9:40 pm - 10:19 pm
BKK
-
ONT
38h 39m
2 stops
$716Delta
Tue, Apr 14 - Fri, May 15
China Airlines Logo
12:10 am - 9:45 am
ONT
-
BKK
19h 35m
1 stop
China Airlines Logo
1:20 pm - 6:00 pm
BKK
-
ONT
18h 40m
1 stop
$726China Airlines
Sat, Apr 4 - Tue, Apr 21
United Airlines Logo
6:49 pm - 9:35 am
ONT
-
BKK
24h 46m
2 stops
United Airlines Logo
7:00 am - 5:52 pm
BKK
-
ONT
24h 52m
2 stops
$727United Airlines
Mon, Apr 27 - Tue, May 19
China Airlines Logo
12:10 am - 4:20 pm
ONT
-
BKK
26h 10m
1 stop
China Airlines Logo
2:40 am - 6:00 pm
BKK
-
ONT
29h 20m
1 stop
$729China Airlines
Sat, Apr 4 - Mon, Apr 20
China Airlines Logo
12:10 am - 12:10 pm
ONT
-
BKK
22h 00m
1 stop
China Airlines Logo
1:20 pm - 6:00 pm
BKK
-
ONT
18h 40m
1 stop
$732China Airlines
Sat, Apr 4 - Tue, Apr 21
China Airlines Logo
12:10 am - 4:20 pm
ONT
-
BKK
26h 10m
1 stop
China Airlines Logo
1:20 pm - 6:00 pm
BKK
-
ONT
18h 40m
1 stop
$736China Airlines
Sun, Mar 29 - Wed, Apr 15

China Airlines flights from Ontario to Bangkok

Our best China Airlines deals on Ontario to Bangkok flight tickets
China Airlines
Apr 4
ONT12:10 amOntario
19h 35m
1 stop
BKK9:45 amBangkok Suvarnabhumi
Apr 21
BKK1:20 pmBangkok Suvarnabhumi
18h 40m
1 stop
ONT6:00 pmOntario
$726
China Airlines
Apr 4
ONT12:10 amOntario
26h 10m
1 stop
BKK4:20 pmBangkok Suvarnabhumi
Apr 20
BKK2:40 amBangkok Suvarnabhumi
29h 20m
1 stop
ONT6:00 pmOntario
$729
China Airlines
Apr 4
ONT12:10 amOntario
22h 00m
1 stop
BKK12:10 pmBangkok Suvarnabhumi
Apr 21
BKK1:20 pmBangkok Suvarnabhumi
18h 40m
1 stop
ONT6:00 pmOntario
$732

United Airlines flights from Ontario to Bangkok

Our best United Airlines deals on Ontario to Bangkok flight tickets
United Airlines
Apr 27
ONT6:49 pmOntario
24h 46m
2 stops
BKK9:35 amBangkok Suvarnabhumi
May 19
BKK7:00 amBangkok Suvarnabhumi
24h 52m
2 stops
ONT5:52 pmOntario
$727
United Airlines
Feb 22
ONT1:50 pmOntario
48h 20m
2 stops
BKK5:10 amBangkok Suvarnabhumi
Mar 11
BKK4:55 pmBangkok Suvarnabhumi
20h 02m
2 stops
ONT10:57 pmOntario
$741
United Airlines
Feb 19
ONT6:10 amOntario
38h 15m
2 stops
BKK11:25 amBangkok Suvarnabhumi
Mar 10
BKK4:55 pmBangkok Suvarnabhumi
38h 46m
2 stops
ONT5:41 pmOntario
$743

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 February 11, 2026.
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

Sun 4/19

7:00 am-11:40 pm

2 stops26h 40m

Bangkok Suvarnabhumi

Thu 5/28

9:50 am-5:10 pm

2 stops21h 20m

$661

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 3/10

6:00 am-12:45 am

2 stops28h 45m

Bangkok Suvarnabhumi

Mon 3/16

2:05 am-5:13 pm

2 stops29h 08m

$666

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 4/13

7:00 am-1:35 pm

2 stops40h 35m

Bangkok Suvarnabhumi

Thu 5/14

11:30 pm-5:10 pm

2 stops31h 40m

$671

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 5/5

7:00 am-11:40 pm

2 stops26h 40m

Bangkok Suvarnabhumi

Sat 5/23

9:50 am-10:19 pm

2 stops26h 29m

$711

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 4/14

7:00 am-11:40 pm

2 stops26h 40m

Bangkok Suvarnabhumi

Fri 5/15

9:40 pm-10:19 pm

2 stops38h 39m

$716

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 4/4

12:10 am-9:45 am

1 stop19h 35m

Bangkok Suvarnabhumi

Tue 4/21

1:20 pm-6:00 pm

1 stop18h 40m

$726

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 4/27

6:49 pm-9:35 am

2 stops24h 46m

Bangkok Suvarnabhumi

Tue 5/19

7:00 am-5:52 pm

2 stops24h 52m

$727

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 4/4

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

Mon 4/20

2:40 am-6:00 pm

1 stop29h 20m

$729

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 4/4

12:10 am-12:10 pm

1 stop22h 00m

Bangkok Suvarnabhumi

Tue 4/21

1:20 pm-6:00 pm

1 stop18h 40m

$732

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 3/29

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

Wed 4/15

1:20 pm-6:00 pm

1 stop18h 40m

$736

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 typical price of a round-trip flight between Ontario and Bangkok?

What is the cheapest month to fly to Bangkok?

If you aren’t able to travel during the month of January, then book flights to Bangkok from Ontario during March instead. Flights to Bangkok in March, while not as cheap as those in January, still average around $773.

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 Friday will generally be more expensive and average around $1,065. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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 $958 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 $786 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

Fastest flight time

20h 00m

Direct flights

None
The fastest flight from Ontario to Bangkok takes 20h 00m
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
DeltaPriceFrom $457Free CancellationRating
7.9
8,180 reviews
Search Delta flights
Korean AirPriceFrom $616Free CancellationRating
8.4
1,191 reviews
Search Korean Air flights
China AirlinesPriceFrom $718Free CancellationRating
8.3
803 reviews
Search China Airlines flights
STARLUX AirlinesPriceFrom $756Free CancellationRating
8.9
273 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