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Cheap flights from Ontario to Bangkok from $361

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 9/23. 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

Korean Air Logo
6:45 am - 9:30 pmONT-BKK
24h 45m2 stops
Korean Air Logo
12:55 am - 10:38 pmBKK-ONT
35h 43m2 stops
$657Korean Air
Find Deal
Tue, Mar 10 - Thu, Mar 19
Korean Air Logo
6:45 am - 9:30 pmONT-BKK
23h 45m2 stops
Korean Air Logo
11:15 pm - 5:09 pmBKK-ONT
32h 54m2 stops
$701Korean Air
Find Deal
Thu, Nov 13 - Tue, Nov 25
Delta Logo
6:00 am - 9:45 pmONT-BKK
25h 45m2 stops
Delta Logo
11:15 pm - 10:20 pmBKK-ONT
37h 05m2 stops
$710Delta
Find Deal
Sun, Oct 19 - Sat, Nov 1
Delta Logo
9:50 am - 9:45 pmONT-BKK
45h 55m2 stops
Delta Logo
12:55 am - 10:41 pmBKK-ONT
35h 46m2 stops
$716Delta
Find Deal
Sat, Oct 18 - Sun, Oct 26
United Airlines Logo
6:00 am - 5:10 amONT-BKK
32h 10m2 stops
United Airlines Logo
9:10 am - 12:14 pmBKK-ONT
42h 04m2 stops
$724United Airlines
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Tue, Dec 30 - Fri, Jan 9
United Airlines Logo
5:05 am - 12:20 amONT-BKK
28h 15m2 stops
United Airlines Logo
9:10 am - 10:53 pmBKK-ONT
28h 43m2 stops
$727United Airlines
Find Deal
Thu, Jan 1 - Sat, Jan 10
China Airlines Logo
12:10 am - 4:20 pmONT-BKK
26h 10m1 stop
China Airlines Logo
2:40 am - 6:00 pmBKK-ONT
29h 20m1 stop
$780China Airlines
Find Deal
Mon, Oct 13 - Mon, Oct 20
China Airlines Logo
10:50 pm - 9:50 amONT-BKK
20h 00m1 stop
China Airlines Logo
2:05 pm - 5:50 pmBKK-ONT
17h 45m1 stop
$782China Airlines
Find Deal
Tue, Feb 24 - Tue, Mar 24
STARLUX Airlines Logo
11:10 pm - 12:00 pmONT-BKK
22h 50m1 stop
STARLUX Airlines Logo
5:40 pm - 4:50 pmBKK-ONT
37h 10m1 stop
$808STARLUX Airlines
Find Deal
Mon, Oct 20 - Thu, Oct 30
STARLUX Airlines Logo
11:10 pm - 4:40 pmONT-BKK
27h 30m1 stop
STARLUX Airlines Logo
1:10 pm - 5:05 pmBKK-ONT
17h 55m1 stop
$828STARLUX Airlines
Find Deal
Wed, Oct 1 - Wed, Oct 8

Delta flights from Ontario to Bangkok Suvarnabhumi Airport

Our best Delta deals on Ontario to Bangkok Suvarnabhumi Airport flight tickets
Delta
Oct 19
ONT6:00 amOntario
25h 45m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
Nov 1
BKK11:15 pmBangkok Suvarnabhumi
37h 05m
2 stops
ONT10:20 pmOntario
$710
Find similar
Delta
Oct 18
ONT9:50 amOntario
45h 55m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
Oct 26
BKK12:55 amBangkok Suvarnabhumi
35h 46m
2 stops
ONT10:41 pmOntario
$716
Find similar
Delta
Oct 25
ONT7:35 amOntario
39h 50m
2 stops
BKK1:25 pmBangkok Suvarnabhumi
Nov 15
BKK12:55 amBangkok Suvarnabhumi
31h 14m
2 stops
ONT5:09 pmOntario
$760
Find similar

United Airlines flights from Ontario to Bangkok Suvarnabhumi Airport

Our best United Airlines deals on Ontario to Bangkok Suvarnabhumi Airport flight tickets
United Airlines
Dec 30
ONT6:00 amOntario
32h 10m
2 stops
BKK5:10 amBangkok Suvarnabhumi
Jan 9
BKK9:10 amBangkok Suvarnabhumi
42h 04m
2 stops
ONT12:14 pmOntario
$724
Find similar
United Airlines
Jan 1
ONT5:05 amOntario
28h 15m
2 stops
BKK12:20 amBangkok Suvarnabhumi
Jan 10
BKK9:10 amBangkok Suvarnabhumi
28h 43m
2 stops
ONT10:53 pmOntario
$727
Find similar
United Airlines
Sep 21
ONT5:10 amOntario
28h 45m
2 stops
BKK11:55 pmBangkok Suvarnabhumi
Sep 29
BKK7:00 amBangkok Suvarnabhumi
24h 40m
2 stops
ONT5:40 pmOntario
$730
Find similar

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 September 16, 2025.
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

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 3/10

6:45 am-9:30 pm

2 stops24h 45m

Bangkok Suvarnabhumi

Thu 3/19

12:55 am-10:38 pm

2 stops35h 43m

$657

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 11/13

6:45 am-9:30 pm

2 stops23h 45m

Bangkok Suvarnabhumi

Tue 11/25

11:15 pm-5:09 pm

2 stops32h 54m

$701

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 10/19

6:00 am-9:45 pm

2 stops25h 45m

Bangkok Suvarnabhumi

Sat 11/1

11:15 pm-10:20 pm

2 stops37h 05m

$710

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 10/18

9:50 am-9:45 pm

2 stops45h 55m

Bangkok Suvarnabhumi

Sun 10/26

12:55 am-10:41 pm

2 stops35h 46m

$716

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 12/30

6:00 am-5:10 am

2 stops32h 10m

Bangkok Suvarnabhumi

Fri 1/9

9:10 am-12:14 pm

2 stops42h 04m

$724

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 1/1

5:05 am-12:20 am

2 stops28h 15m

Bangkok Suvarnabhumi

Sat 1/10

9:10 am-10:53 pm

2 stops28h 43m

$727

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 10/13

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

Mon 10/20

2:40 am-6:00 pm

1 stop29h 20m

$780

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 2/24

10:50 pm-9:50 am

1 stop20h 00m

Bangkok Suvarnabhumi

Tue 3/24

2:05 pm-5:50 pm

1 stop17h 45m

$782

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 10/20

11:10 pm-12:00 pm

1 stop22h 50m

Bangkok Suvarnabhumi

Thu 10/30

5:40 pm-4:50 pm

1 stop37h 10m

$808

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 10/1

11:10 pm-4:40 pm

1 stop27h 30m

Bangkok Suvarnabhumi

Wed 10/8

1:10 pm-5:05 pm

1 stop17h 55m

$828

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 August is, on average, the cheapest month to fly to Bangkok Suvarnabhumi Airport from Ontario, with most prices found around $806. The month of September is another great option to travel to Bangkok Suvarnabhumi Airport, with average flight prices from Ontario averaging around $825.

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 Thursday when prices can be found for as low as $741. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday 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 $936.

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

Our most recent data shows that the best time of day to fly to Bangkok Suvarnabhumi Airport is in the evening. Flights from Ontario to Bangkok Suvarnabhumi Airport during this time can be as low as $741. At noon is when there is more demand to fly to Bangkok Suvarnabhumi Airport, so prices are often more expensive at around $922 per ticket.

How far in advance should I book a flight 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 $1,021 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 $804 on momondo.

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

You could potentially save up to 7% 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 September 2025, prices for Ontario to Bangkok Suvarnabhumi Airport flights are approximately 42% 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

Direct flights

None
There are no direct flights from Ontario to Bangkok Suvarnabhumi Airport. There are no popular flight routes from Ontario to Bangkok Suvarnabhumi Airport.
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  • 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 35m.

  • 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
Korean AirPriceFrom $781Free CancellationRating
8.4
1,139 reviews
Search Korean Air flights
STARLUX AirlinesPriceFrom $789Free CancellationRating
8.9
211 reviews
Search STARLUX Airlines flights
United AirlinesPriceFrom $795Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
China AirlinesPriceFrom $798Free CancellationRating
8.3
767 reviews
Search China 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
Ayutthaya
Chonburi
Cha-am
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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