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Cheap flights from Ontario to Bangkok from $423

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 9/15. 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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Find the cheapest flights from Ontario to Bangkok

Cheap round-trip flights

Korean Air Logo
6:37 am - 1:05 amONT-BKK
28h 28m2 stops
Korean Air Logo
1:00 am - 5:10 pmBKK-ONT
31h 10m2 stops
$739Korean Air
Find Deal
Sun, Oct 19 - Wed, Nov 5
Korean Air Logo
6:00 am - 9:45 pmONT-BKK
25h 45m2 stops
Korean Air Logo
11:30 pm - 5:00 pmBKK-ONT
31h 30m2 stops
$743Korean Air
Find Deal
Fri, Sep 12 - Sat, Sep 27
Korean Air Logo
6:00 am - 9:45 pmONT-BKK
25h 45m2 stops
Korean Air Logo
2:35 am - 5:00 pmBKK-ONT
28h 25m2 stops
$746Korean Air
Find Deal
Fri, Sep 12 - Fri, Sep 26
Korean Air Logo
6:00 am - 1:05 amONT-BKK
29h 05m2 stops
Korean Air Logo
2:35 am - 10:40 pmBKK-ONT
34h 05m2 stops
$766Korean Air
Find Deal
Wed, Sep 3 - Tue, Sep 16
Delta Logo
6:05 am - 9:45 pmONT-BKK
25h 40m2 stops
Delta Logo
9:40 am - 5:10 pmBKK-ONT
22h 30m2 stops
$778Delta
Find Deal
Wed, Aug 20 - Thu, Nov 6
Delta Logo
6:05 am - 9:45 pmONT-BKK
25h 40m2 stops
Delta Logo
9:50 am - 10:40 pmBKK-ONT
26h 50m2 stops
$779Delta
Find Deal
Mon, Sep 1 - Wed, Sep 10
China Airlines Logo
10:50 pm - 9:50 amONT-BKK
20h 00m1 stop
China Airlines Logo
2:35 am - 4:50 pmBKK-ONT
29h 15m1 stop
$796China Airlines
Find Deal
Fri, Jan 23 - Thu, Feb 5
China Airlines Logo
10:50 pm - 9:50 amONT-BKK
20h 00m1 stop
China Airlines Logo
2:05 pm - 4:50 pmBKK-ONT
17h 45m1 stop
$797China Airlines
Find Deal
Mon, Jan 26 - Mon, Feb 23
STARLUX Airlines Logo
9:45 pm - 12:35 pmONT-BKK
23h 50m1 stop
STARLUX Airlines Logo
1:45 pm - 3:50 pmBKK-ONT
17h 05m1 stop
$806STARLUX Airlines
Find Deal
Mon, Nov 3 - Mon, Nov 17
STARLUX Airlines Logo
9:45 pm - 4:30 pmONT-BKK
27h 45m1 stop
STARLUX Airlines Logo
5:40 pm - 3:50 pmBKK-ONT
37h 10m1 stop
$807STARLUX Airlines
Find Deal
Mon, Nov 10 - Sun, Nov 16

Delta flights from Ontario to Bangkok Suvarnabhumi Airport

Our best Delta deals on Ontario to Bangkok Suvarnabhumi Airport flight tickets
Delta
Aug 20
ONT6:05 amOntario
25h 40m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
Nov 6
BKK9:40 amBangkok Suvarnabhumi
22h 30m
2 stops
ONT5:10 pmOntario
$778
Find similar
Delta
Sep 1
ONT6:05 amOntario
25h 40m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
Sep 10
BKK9:50 amBangkok Suvarnabhumi
26h 50m
2 stops
ONT10:40 pmOntario
$779
Find similar
Delta
Aug 31
ONT6:00 amOntario
25h 45m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
Sep 14
BKK9:40 pmBangkok Suvarnabhumi
40h 02m
2 stops
ONT11:42 pmOntario
$780
Find similar

STARLUX Airlines flights from Ontario to Bangkok Suvarnabhumi Airport

Our best STARLUX Airlines deals on Ontario to Bangkok Suvarnabhumi Airport flight tickets
STARLUX Airlines
Nov 3
ONT9:45 pmOntario
23h 50m
1 stop
BKK12:35 pmBangkok Suvarnabhumi
Nov 17
BKK1:45 pmBangkok Suvarnabhumi
17h 05m
1 stop
ONT3:50 pmOntario
$806
Find similar
STARLUX Airlines
Nov 10
ONT9:45 pmOntario
27h 45m
1 stop
BKK4:30 pmBangkok Suvarnabhumi
Nov 16
BKK5:40 pmBangkok Suvarnabhumi
37h 10m
1 stop
ONT3:50 pmOntario
$807
Find similar
STARLUX Airlines
Aug 20
ONT11:45 pmOntario
22h 15m
1 stop
BKK12:00 pmBangkok Suvarnabhumi
Sep 1
BKK1:10 pmBangkok Suvarnabhumi
17h 55m
1 stop
ONT5:05 pmOntario
$808
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 July 31, 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

Sun 10/19

6:37 am-1:05 am

2 stops28h 28m

Bangkok Suvarnabhumi

Wed 11/5

1:00 am-5:10 pm

2 stops31h 10m

$739

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Fri 9/12

6:00 am-9:45 pm

2 stops25h 45m

Bangkok Suvarnabhumi

Sat 9/27

11:30 pm-5:00 pm

2 stops31h 30m

$743

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Fri 9/12

6:00 am-9:45 pm

2 stops25h 45m

Bangkok Suvarnabhumi

Fri 9/26

2:35 am-5:00 pm

2 stops28h 25m

$746

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 9/3

6:00 am-1:05 am

2 stops29h 05m

Bangkok Suvarnabhumi

Tue 9/16

2:35 am-10:40 pm

2 stops34h 05m

$766

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 8/20

6:05 am-9:45 pm

2 stops25h 40m

Bangkok Suvarnabhumi

Thu 11/6

9:40 am-5:10 pm

2 stops22h 30m

$778

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 9/1

6:05 am-9:45 pm

2 stops25h 40m

Bangkok Suvarnabhumi

Wed 9/10

9:50 am-10:40 pm

2 stops26h 50m

$779

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Fri 1/23

10:50 pm-9:50 am

1 stop20h 00m

Bangkok Suvarnabhumi

Thu 2/5

2:35 am-4:50 pm

1 stop29h 15m

$796

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 1/26

10:50 pm-9:50 am

1 stop20h 00m

Bangkok Suvarnabhumi

Mon 2/23

2:05 pm-4:50 pm

1 stop17h 45m

$797

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 11/3

9:45 pm-12:35 pm

1 stop23h 50m

Bangkok Suvarnabhumi

Mon 11/17

1:45 pm-3:50 pm

1 stop17h 05m

$806

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 11/10

9:45 pm-4:30 pm

1 stop27h 45m

Bangkok Suvarnabhumi

Sun 11/16

5:40 pm-3:50 pm

1 stop37h 10m

$807

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 cheapest month to fly to Bangkok Suvarnabhumi Airport?

The month of September is, on average, the cheapest month to fly to Bangkok Suvarnabhumi Airport from Ontario, with most prices found around $825. The month of March is another great option to travel to Bangkok Suvarnabhumi Airport, with average flight prices from Ontario averaging around $871.

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 $1,018 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 $817 on momondo.

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

You could potentially save up to 2% 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 July 2025, prices for Ontario to Bangkok Suvarnabhumi Airport flights are approximately 11% 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

Best Price Found

$423

Fastest flight time

19h 00m

Direct flights

None
The best one-way flight to Bangkok Suvarnabhumi Airport from Ontario in the past 72 hours is $423. The best round-trip flight deal from Ontario to Bangkok Suvarnabhumi Airport found on momondo in the last 72 hours is $739.
The fastest flight from Ontario to Bangkok Suvarnabhumi Airport takes 19h 00m
There are no direct flights from Ontario to Bangkok Suvarnabhumi Airport. Popular non-direct route for this connection is Ontario Airport - Bangkok Suvarnabhumi Airport.
Search flight deals

  • 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
Korean AirPriceFrom $781Free CancellationRating
8.4
1,121 reviews
Search Korean Air flights
STARLUX AirlinesPriceFrom $789Free CancellationRating
9.0
199 reviews
Search STARLUX Airlines flights
United AirlinesPriceFrom $795Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
China AirlinesPriceFrom $822Free CancellationRating
8.3
754 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
Sattahip
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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