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Cheap flights from Ontario to Bangkok from $368

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 8/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 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.
Korean Air Logo
7:00 am - 1:35 pm
ONT
-
BKK
40h 35m
2 stops
Korean Air Logo
9:50 am - 5:10 pm
BKK
-
ONT
45h 20m
2 stops
$713Korean Air
Wed, Apr 29 - Wed, May 6
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
$716China Airlines
Mon, May 4 - Tue, May 19
China Airlines Logo
12:10 am - 9:45 am
ONT
-
BKK
19h 35m
1 stop
China Airlines Logo
10:50 am - 6:00 pm
BKK
-
ONT
21h 10m
1 stop
$719China Airlines
Wed, May 6 - Wed, May 20
China Airlines Logo
12:10 am - 12:10 pm
ONT
-
BKK
22h 00m
1 stop
China Airlines Logo
10:50 am - 6:00 pm
BKK
-
ONT
21h 10m
1 stop
$720China Airlines
Wed, May 13 - Thu, May 21
China Airlines Logo
12:10 am - 1:25 am
ONT
-
BKK
35h 15m
1 stop
China Airlines Logo
10:50 am - 6:00 pm
BKK
-
ONT
21h 10m
1 stop
$726China Airlines
Tue, May 5 - Sat, May 16
China Airlines Logo
12:45 am - 12:10 pm
ONT
-
BKK
21h 25m
1 stop
China Airlines Logo
10:50 am - 6:00 pm
BKK
-
ONT
21h 10m
1 stop
$728China Airlines
Tue, Sep 1 - Wed, Sep 16
Delta Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Delta Logo
9:50 am - 10:40 pm
BKK
-
ONT
26h 50m
2 stops
$734Delta
Mon, Aug 31 - Wed, Sep 9
China Airlines Logo
12:10 am - 12:10 pm
ONT
-
BKK
22h 00m
1 stop
China Airlines Logo
2:40 am - 6:00 pm
BKK
-
ONT
29h 20m
1 stop
$737China Airlines
Sat, May 2 - Sun, May 17
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
$741China Airlines
Tue, May 12 - Sat, May 23
Multiple Airlines Logo
12:10 am - 5:35 pm
ONT
-
DMK
27h 25m
2 stops
Multiple Airlines Logo
7:30 am - 6:00 pm
DMK
-
ONT
24h 30m
2 stops
$1,012Multiple Airlines
Sat, Apr 18 - Mon, Apr 27

Korean Air flights from Ontario to Bangkok

Our best Korean Air deals on Ontario to Bangkok flight tickets
Korean Air
Apr 29
ONT7:00 amOntario
40h 35m
2 stops
BKK1:35 pmBangkok Suvarnabhumi
May 6
BKK9:50 amBangkok Suvarnabhumi
45h 20m
2 stops
ONT5:10 pmOntario
$713
Korean Air
Apr 14
ONT7:00 amOntario
40h 35m
2 stops
BKK1:35 pmBangkok Suvarnabhumi
May 15
BKK11:30 pmBangkok Suvarnabhumi
31h 35m
2 stops
ONT5:05 pmOntario
$775
Korean Air
Aug 24
ONT7:00 amOntario
24h 45m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
Sep 23
BKK2:35 amBangkok Suvarnabhumi
28h 41m
2 stops
ONT5:16 pmOntario
$789

China Airlines flights from Ontario to Bangkok

Our best China Airlines deals on Ontario to Bangkok flight tickets
China Airlines
May 4
ONT12:10 amOntario
26h 10m
1 stop
BKK4:20 pmBangkok Suvarnabhumi
May 19
BKK1:20 pmBangkok Suvarnabhumi
18h 40m
1 stop
ONT6:00 pmOntario
$716
China Airlines
May 6
ONT12:10 amOntario
19h 35m
1 stop
BKK9:45 amBangkok Suvarnabhumi
May 20
BKK10:50 amBangkok Suvarnabhumi
21h 10m
1 stop
ONT6:00 pmOntario
$719
China Airlines
May 13
ONT12:10 amOntario
22h 00m
1 stop
BKK12:10 pmBangkok Suvarnabhumi
May 21
BKK10:50 amBangkok Suvarnabhumi
21h 10m
1 stop
ONT6:00 pmOntario
$720

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 March 20, 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

Cheapest round-trip

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 4/29

7:00 am-1:35 pm

2 stops40h 35m

Bangkok Suvarnabhumi

Wed 5/6

9:50 am-5:10 pm

2 stops45h 20m

$713

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 5/4

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

Tue 5/19

1:20 pm-6:00 pm

1 stop18h 40m

$716

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 5/6

12:10 am-9:45 am

1 stop19h 35m

Bangkok Suvarnabhumi

Wed 5/20

10:50 am-6:00 pm

1 stop21h 10m

$719

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 5/13

12:10 am-12:10 pm

1 stop22h 00m

Bangkok Suvarnabhumi

Thu 5/21

10:50 am-6:00 pm

1 stop21h 10m

$720

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 5/5

12:10 am-1:25 am

1 stop35h 15m

Bangkok Suvarnabhumi

Sat 5/16

10:50 am-6:00 pm

1 stop21h 10m

$726

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 9/1

12:45 am-12:10 pm

1 stop21h 25m

Bangkok Suvarnabhumi

Wed 9/16

10:50 am-6:00 pm

1 stop21h 10m

$728

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 8/31

7:00 am-9:45 pm

2 stops24h 45m

Bangkok Suvarnabhumi

Wed 9/9

9:50 am-10:40 pm

2 stops26h 50m

$734

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 5/2

12:10 am-12:10 pm

1 stop22h 00m

Bangkok Suvarnabhumi

Sun 5/17

2:40 am-6:00 pm

1 stop29h 20m

$737
Quickest round-trip

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 5/12

12:10 am-12:10 pm

1 stop22h 00m

Bangkok Suvarnabhumi

Sat 5/23

1:20 pm-6:00 pm

1 stop18h 40m

$741

OntarioBangkok

ONT - DMK

ONTDMK

Ontario

Sat 4/18

12:10 am-5:35 pm

2 stops27h 25m

Bangkok Don Mueang Intl

Mon 4/27

7:30 am-6:00 pm

2 stops24h 30m

$1,012

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 February instead. Flights to Bangkok in February, while not as cheap as those in January, still average around $788.

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 $951 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 $802 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

22h 15m

Direct flights

None
The fastest flight from Ontario to Bangkok takes 22h 15m
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 22h 15m.

  • 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
8,306 reviews
Search Delta flights
Korean AirPriceFrom $616Free CancellationRating
8.4
1,205 reviews
Search Korean Air flights
China AirlinesPriceFrom $718Free CancellationRating
8.3
814 reviews
Search China Airlines flights
STARLUX AirlinesPriceFrom $763Free CancellationRating
9.0
290 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