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Cheap flights from Ontario to Bangkok from $425

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 11/13. 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

Discover deals from 900+ travel sites with momondo.

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 - 1:25 pm
ONT
-
BKK
39h 25m
2 stops
Korean Air Logo
11:15 pm - 4:56 pm
BKK
-
ONT
32h 41m
2 stops
$837Korean Air
Mon, Nov 16 - Mon, Dec 21
Delta Logo
6:20 am - 9:45 pm
ONT
-
BKK
25h 25m
2 stops
Delta Logo
9:40 pm - 5:17 pm
BKK
-
ONT
33h 37m
2 stops
$839Delta
Mon, Sep 28 - Tue, Oct 13
Delta Logo
7:00 am - 1:05 am
ONT
-
BKK
28h 05m
2 stops
Delta Logo
11:15 pm - 10:43 pm
BKK
-
ONT
38h 28m
2 stops
$840Delta
Thu, Oct 22 - Sun, Nov 1
Delta Logo
5:05 pm - 9:45 pm
ONT
-
BKK
38h 40m
2 stops
Delta Logo
11:30 pm - 10:40 pm
BKK
-
ONT
37h 10m
2 stops
$845Delta
Sun, Sep 6 - Sun, Sep 13
Korean Air Logo
6:20 am - 9:45 pm
ONT
-
BKK
25h 25m
2 stops
Korean Air Logo
11:30 pm - 5:21 pm
BKK
-
ONT
31h 51m
2 stops
$849Korean Air
Mon, Aug 10 - Tue, Aug 25
Korean Air Logo
6:20 am - 9:45 pm
ONT
-
BKK
25h 25m
2 stops
Korean Air Logo
2:35 am - 5:21 pm
BKK
-
ONT
28h 46m
2 stops
$853Korean Air
Thu, Aug 13 - Tue, Aug 25
Delta Logo
6:20 am - 9:45 pm
ONT
-
BKK
25h 25m
2 stops
Delta Logo
9:50 am - 10:40 pm
BKK
-
ONT
26h 50m
2 stops
$867Delta
Thu, Aug 6 - Tue, Sep 22
Korean Air Logo
6:20 am - 11:35 pm
ONT
-
BKK
27h 15m
2 stops
Korean Air Logo
9:40 pm - 10:45 pm
BKK
-
ONT
39h 05m
2 stops
$872Korean Air
Mon, Aug 31 - Sun, Sep 6
Korean Air Logo
6:20 am - 11:35 pm
ONT
-
BKK
27h 15m
2 stops
Korean Air Logo
2:35 am - 5:21 pm
BKK
-
ONT
28h 46m
2 stops
$880Korean Air
Mon, Aug 10 - Tue, Aug 25
Delta Logo
1:00 pm - 9:30 pm
ONT
-
BKK
41h 30m
2 stops
Delta Logo
9:40 am - 11:16 am
BKK
-
ONT
40h 36m
2 stops
$882Delta
Sat, Nov 14 - Thu, Dec 24

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Korean Air flights from Ontario to Bangkok Suvarnabhumi Airport

Our best Korean Air deals on Ontario to Bangkok Suvarnabhumi Airport flight tickets
Korean Air
Nov 16
ONT7:00 amOntario
23h 30m
2 stops
BKK9:30 pmBangkok Suvarnabhumi
Dec 20
BKK11:15 pmBangkok Suvarnabhumi
32h 41m
2 stops
ONT4:56 pmOntario
$837
Korean Air
Aug 10
ONT6:20 amOntario
25h 25m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
Aug 25
BKK11:30 pmBangkok Suvarnabhumi
31h 51m
2 stops
ONT5:21 pmOntario
$849
Korean Air
Aug 13
ONT6:20 amOntario
25h 25m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
Aug 25
BKK2:35 amBangkok Suvarnabhumi
28h 46m
2 stops
ONT5:21 pmOntario
$853

Delta flights from Ontario to Bangkok Suvarnabhumi Airport

Our best Delta deals on Ontario to Bangkok Suvarnabhumi Airport flight tickets
Delta
Sep 28
ONT6:20 amOntario
25h 25m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
Oct 13
BKK9:40 pmBangkok Suvarnabhumi
33h 37m
2 stops
ONT5:17 pmOntario
$839
Delta
Oct 22
ONT7:00 amOntario
28h 05m
2 stops
BKK1:05 amBangkok Suvarnabhumi
Nov 1
BKK11:15 pmBangkok Suvarnabhumi
38h 28m
2 stops
ONT10:43 pmOntario
$840
Delta
Sep 6
ONT5:05 pmOntario
38h 40m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
Sep 13
BKK11:30 pmBangkok Suvarnabhumi
37h 10m
2 stops
ONT10:40 pmOntario
$845

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Bangkok Suvarnabhumi Airport 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 June 23, 2026.
Use the filters below to find and compare flights from Ontario to Bangkok Suvarnabhumi Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 11/16

7:00 am-1:25 pm

2 stops39h 25m

Bangkok Suvarnabhumi

Mon 12/21

11:15 pm-4:56 pm

2 stops32h 41m

$837

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 9/28

6:20 am-9:45 pm

2 stops25h 25m

Bangkok Suvarnabhumi

Tue 10/13

9:40 pm-5:17 pm

2 stops33h 37m

$839

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 10/22

7:00 am-1:05 am

2 stops28h 05m

Bangkok Suvarnabhumi

Sun 11/1

11:15 pm-10:43 pm

2 stops38h 28m

$840

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 9/6

5:05 pm-9:45 pm

2 stops38h 40m

Bangkok Suvarnabhumi

Sun 9/13

11:30 pm-10:40 pm

2 stops37h 10m

$845

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 8/10

6:20 am-9:45 pm

2 stops25h 25m

Bangkok Suvarnabhumi

Tue 8/25

11:30 pm-5:21 pm

2 stops31h 51m

$849

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 8/13

6:20 am-9:45 pm

2 stops25h 25m

Bangkok Suvarnabhumi

Tue 8/25

2:35 am-5:21 pm

2 stops28h 46m

$853
Quickest round-trip

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 8/6

6:20 am-9:45 pm

2 stops25h 25m

Bangkok Suvarnabhumi

Tue 9/22

9:50 am-10:40 pm

2 stops26h 50m

$867

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 8/31

6:20 am-11:35 pm

2 stops27h 15m

Bangkok Suvarnabhumi

Sun 9/6

9:40 pm-10:45 pm

2 stops39h 05m

$872

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 8/10

6:20 am-11:35 pm

2 stops27h 15m

Bangkok Suvarnabhumi

Tue 8/25

2:35 am-5:21 pm

2 stops28h 46m

$880

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 11/14

1:00 pm-9:30 pm

2 stops41h 30m

Bangkok Suvarnabhumi

Thu 12/24

9:40 am-11:16 am

2 stops40h 36m

$882

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 Suvarnabhumi Airport

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 Suvarnabhumi Airport?

What is the cheapest month to fly to Bangkok Suvarnabhumi Airport?

The month of January is, on average, the cheapest month to fly to Bangkok Suvarnabhumi Airport from Ontario, with most prices found around $764. The month of February is another great option to travel to Bangkok Suvarnabhumi Airport, with average flight prices from Ontario averaging around $783.

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

The cheapest day to depart on your flight to Bangkok Suvarnabhumi Airport is on a Saturday when prices can be found for as low as $873. This is often the case because there is less demand to fly during this day of the week. On the other hand, Friday is the most expensive day to depart from Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,353.

How far in advance should I book a flight from Ontario to Bangkok Suvarnabhumi Airport?

You are more likely to see cheaper flights to Bangkok Suvarnabhumi Airport from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Bangkok Suvarnabhumi Airport 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 Suvarnabhumi Airport from Ontario for as low as $761 on momondo.

Can stopping save me money on Ontario to Bangkok Suvarnabhumi Airport flights?

You could potentially save up to 24% on your flight if you consider stops on a Ontario to Bangkok Suvarnabhumi Airport flight.

How have Ontario to Bangkok Suvarnabhumi Airport flight prices changed over time?

As of June 2026, prices for Ontario to Bangkok Suvarnabhumi Airport flights are approximately 33% cheaper when compared to flights at the same time last year.

When to book flights from Ontario to Bangkok Suvarnabhumi Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Bangkok Suvarnabhumi Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Bangkok Suvarnabhumi Airport (ONT to BKK) flight deals and tips

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

Fastest flight time

20h 00m

Direct flights

None
The fastest flight from Ontario to Bangkok Suvarnabhumi Airport takes 20h 00m
There are no direct flights from Ontario to Bangkok Suvarnabhumi Airport. There are no popular flight routes from Ontario to Bangkok Suvarnabhumi Airport.
Search flight deals

Frequently asked questions about flying from Ontario to Bangkok Suvarnabhumi Airport

  • How far is Ontario to Bangkok Suvarnabhumi by plane?

    A flight from Ontario to Bangkok Suvarnabhumi will travel around 8277.1 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 Suvarnabhumi Airport?

    Prices for flights from Ontario Airport to Bangkok Suvarnabhumi Airport are refreshed on a daily basis.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Bangkok Suvarnabhumi Airport.

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

    The required travel and health documents for your Bangkok Suvarnabhumi Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Bangkok Suvarnabhumi Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Ontario to Bangkok Suvarnabhumi Airport?

Best airlines flying from Ontario to Bangkok Suvarnabhumi Airport

Compare and see reviews for airlines that fly from Ontario to Bangkok Suvarnabhumi Airport with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $457Free CancellationRating
7.8
8,425 reviews
Search Delta flights
Korean AirPriceFrom $616Free CancellationRating
8.4
1,218 reviews
Search Korean Air flights
China AirlinesPriceFrom $717Free CancellationRating
8.3
829 reviews
Search China Airlines flights
STARLUX AirlinesPriceFrom $763Free CancellationRating
8.9
344 reviews
Search STARLUX Airlines flights

Traveling to a place near Bangkok?

Book flights to Bangkok if you plan to visit one of these locations
Pattaya
Ko Samet
Kanchanaburi
Cha-am
Chonburi
Ko Lan
Sattahip
Ayutthaya
Pak Chong
Phetchaburi

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Bangkok?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Bangkok. Millions of users trust and use momondo every year so you are in good hands.

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

All flight searches from Ontario to Bangkok on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Ontario and Bangkok by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to Bangkok, momondo offers a useful price alert feature which will track prices for flights to Bangkok from Ontario and alert you when they change.

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