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Cheap flights from Ontario to Bangkok from $491

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 8/8. 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.
Korean Air Logo
7:00 am - 1:05 am
ONT
-
BKK
28h 05m
2 stops
Korean Air Logo
9:40 pm - 10:40 pm
BKK
-
ONT
39h 00m
2 stops
$835Korean Air
Wed, Sep 2 - Wed, Sep 9
Delta Logo
6:00 am - 9:30 pm
ONT
-
BKK
25h 30m
2 stops
Delta Logo
9:40 am - 5:17 pm
BKK
-
ONT
22h 37m
2 stops
$852Delta
Thu, Oct 29 - Tue, Nov 3
Delta Logo
6:20 am - 1:05 am
ONT
-
BKK
28h 45m
2 stops
Delta Logo
9:50 am - 10:40 pm
BKK
-
ONT
26h 50m
2 stops
$853Delta
Sat, Jul 11 - Wed, Sep 9
Delta Logo
6:00 am - 9:30 pm
ONT
-
BKK
25h 30m
2 stops
Delta Logo
9:40 am - 5:17 pm
BKK
-
ONT
22h 37m
2 stops
$877Delta
Thu, Oct 29 - Wed, Nov 11
Delta Logo
6:00 am - 1:05 am
ONT
-
BKK
29h 05m
2 stops
Delta Logo
9:40 am - 5:17 pm
BKK
-
ONT
21h 37m
2 stops
$878Delta
Thu, Oct 8 - Tue, Oct 27
Delta Logo
7:00 am - 11:20 pm
ONT
-
BKK
26h 20m
2 stops
Delta Logo
9:40 am - 4:12 pm
BKK
-
ONT
21h 32m
2 stops
$882Delta
Fri, Oct 30 - Tue, Nov 10
Delta Logo
7:00 am - 1:05 am
ONT
-
BKK
28h 05m
2 stops
Delta Logo
9:40 am - 5:17 pm
BKK
-
ONT
21h 37m
2 stops
$883Delta
Fri, Oct 2 - Tue, Oct 27
Delta Logo
6:00 am - 9:30 pm
ONT
-
BKK
24h 30m
2 stops
Delta Logo
9:40 am - 5:17 pm
BKK
-
ONT
22h 37m
2 stops
$902Delta
Mon, Nov 2 - Thu, Nov 12
Delta Logo
7:00 am - 11:20 pm
ONT
-
BKK
26h 20m
2 stops
Delta Logo
9:40 am - 5:17 pm
BKK
-
ONT
22h 37m
2 stops
$907Delta
Fri, Oct 30 - Wed, Nov 11
Delta Logo
7:00 am - 11:20 pm
ONT
-
BKK
26h 20m
2 stops
Delta Logo
9:40 am - 5:17 pm
BKK
-
ONT
22h 37m
2 stops
$908Delta
Sun, Oct 25 - Wed, Nov 11

Korean Air flights from Ontario to Bangkok Suvarnabhumi Airport

Our best Korean Air deals on Ontario to Bangkok Suvarnabhumi Airport flight tickets
Korean Air
Sep 2
ONT7:00 amOntario
28h 05m
2 stops
BKK1:05 amBangkok Suvarnabhumi
Sep 9
BKK9:40 pmBangkok Suvarnabhumi
39h 00m
2 stops
ONT10:40 pmOntario
$835
Korean Air
Sep 16
ONT7:00 amOntario
24h 45m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
Sep 29
BKK2:35 amBangkok Suvarnabhumi
34h 05m
2 stops
ONT10:40 pmOntario
$945
Korean Air
Jul 24
ONT6:20 amOntario
27h 15m
2 stops
BKK11:35 pmBangkok Suvarnabhumi
Oct 23
BKK2:35 amBangkok Suvarnabhumi
28h 42m
2 stops
ONT5:17 pmOntario
$957

Delta flights from Ontario to Bangkok Suvarnabhumi Airport

Our best Delta deals on Ontario to Bangkok Suvarnabhumi Airport flight tickets
Delta
Oct 29
ONT6:00 amOntario
25h 30m
2 stops
BKK9:30 pmBangkok Suvarnabhumi
Nov 3
BKK9:40 amBangkok Suvarnabhumi
22h 37m
2 stops
ONT5:17 pmOntario
$852
Delta
Jul 11
ONT6:20 amOntario
28h 45m
2 stops
BKK1:05 amBangkok Suvarnabhumi
Sep 9
BKK9:50 amBangkok Suvarnabhumi
26h 50m
2 stops
ONT10:40 pmOntario
$853
Delta
Oct 29
ONT6:00 amOntario
25h 30m
2 stops
BKK9:30 pmBangkok Suvarnabhumi
Nov 11
BKK9:40 amBangkok Suvarnabhumi
22h 37m
2 stops
ONT5:17 pmOntario
$877

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 May 9, 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

Wed 9/2

7:00 am-1:05 am

2 stops28h 05m

Bangkok Suvarnabhumi

Wed 9/9

9:40 pm-10:40 pm

2 stops39h 00m

$835

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 10/29

6:00 am-9:30 pm

2 stops25h 30m

Bangkok Suvarnabhumi

Tue 11/3

9:40 am-5:17 pm

2 stops22h 37m

$852

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 7/11

6:20 am-1:05 am

2 stops28h 45m

Bangkok Suvarnabhumi

Wed 9/9

9:50 am-10:40 pm

2 stops26h 50m

$853

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 10/29

6:00 am-9:30 pm

2 stops25h 30m

Bangkok Suvarnabhumi

Wed 11/11

9:40 am-5:17 pm

2 stops22h 37m

$877

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 10/8

6:00 am-1:05 am

2 stops29h 05m

Bangkok Suvarnabhumi

Tue 10/27

9:40 am-5:17 pm

2 stops21h 37m

$878

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Fri 10/30

7:00 am-11:20 pm

2 stops26h 20m

Bangkok Suvarnabhumi

Tue 11/10

9:40 am-4:12 pm

2 stops21h 32m

$882

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Fri 10/2

7:00 am-1:05 am

2 stops28h 05m

Bangkok Suvarnabhumi

Tue 10/27

9:40 am-5:17 pm

2 stops21h 37m

$883
Quickest round-trip

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 11/2

6:00 am-9:30 pm

2 stops24h 30m

Bangkok Suvarnabhumi

Thu 11/12

9:40 am-5:17 pm

2 stops22h 37m

$902

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Fri 10/30

7:00 am-11:20 pm

2 stops26h 20m

Bangkok Suvarnabhumi

Wed 11/11

9:40 am-5:17 pm

2 stops22h 37m

$907

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 10/25

7:00 am-11:20 pm

2 stops26h 20m

Bangkok Suvarnabhumi

Wed 11/11

9:40 am-5:17 pm

2 stops22h 37m

$908

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 Sunday when prices can be found for as low as $795. 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 $954 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 $801 on momondo.

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

As of May 2026, prices for Ontario to Bangkok Suvarnabhumi Airport flights are approximately 4% more expensive 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

19h 00m

Direct flights

None
The fastest flight from Ontario to Bangkok Suvarnabhumi Airport takes 19h 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 19h 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
7.9
8,457 reviews
Search Delta flights
Korean AirPriceFrom $616Free CancellationRating
8.4
1,217 reviews
Search Korean Air flights
China AirlinesPriceFrom $717Free CancellationRating
8.3
822 reviews
Search China Airlines flights
STARLUX AirlinesPriceFrom $763Free CancellationRating
8.9
312 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
Ayutthaya
Ko Lan
Pak Chong
Sattahip
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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