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Cheap flights from Ontario to Bangkok from $340

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 7/25. 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 - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Korean Air Logo
9:40 pm - 5:10 pm
BKK
-
ONT
33h 30m
2 stops
$687Korean Air
Mon, Apr 27 - Tue, May 12
Korean Air Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Korean Air Logo
11:30 pm - 5:10 pm
BKK
-
ONT
31h 40m
2 stops
$692Korean Air
Mon, Apr 27 - Wed, May 13
Delta Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Delta Logo
9:50 am - 5:10 pm
BKK
-
ONT
21h 20m
2 stops
$710Delta
Sun, Apr 26 - Tue, May 19
Korean Air Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Korean Air Logo
11:30 pm - 5:10 pm
BKK
-
ONT
31h 40m
2 stops
$715Korean Air
Tue, Apr 21 - Tue, May 12
Delta Logo
7:00 am - 1:05 am
ONT
-
BKK
28h 05m
2 stops
Delta Logo
11:30 pm - 11:44 pm
BKK
-
ONT
38h 14m
2 stops
$722Delta
Wed, Sep 9 - Sat, Sep 19
Korean Air Logo
7:00 am - 11:35 pm
ONT
-
BKK
26h 35m
2 stops
Korean Air Logo
11:30 pm - 5:16 pm
BKK
-
ONT
31h 46m
2 stops
$727Korean Air
Wed, Sep 9 - Sat, Sep 19
Korean Air Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Korean Air Logo
9:50 am - 5:10 pm
BKK
-
ONT
21h 20m
2 stops
$728Korean Air
Sun, Apr 26 - Tue, May 12
Korean Air Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Korean Air Logo
9:50 am - 5:10 pm
BKK
-
ONT
21h 20m
2 stops
$735Korean Air
Sun, Apr 26 - Tue, May 12
China Airlines Logo
12:45 am - 12:10 pm
ONT
-
BKK
21h 25m
1 stop
China Airlines Logo
1:20 pm - 6:00 pm
BKK
-
ONT
18h 40m
1 stop
$750China Airlines
Tue, Sep 8 - Tue, Sep 22
China Airlines Logo
12:10 am - 4:20 pm
ONT
-
BKK
26h 10m
1 stop
China Airlines Logo
10:50 am - 6:00 pm
BKK
-
ONT
21h 10m
1 stop
$752China Airlines
Wed, Sep 16 - Sun, Sep 27

Korean Air flights from Ontario to Bangkok Suvarnabhumi Airport

Our best Korean Air deals on Ontario to Bangkok Suvarnabhumi Airport flight tickets
Korean Air
Apr 27
ONT7:00 amOntario
24h 45m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
May 12
BKK9:40 pmBangkok Suvarnabhumi
33h 30m
2 stops
ONT5:10 pmOntario
$687
Korean Air
Apr 27
ONT7:00 amOntario
24h 45m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
May 13
BKK11:30 pmBangkok Suvarnabhumi
31h 40m
2 stops
ONT5:10 pmOntario
$692
Korean Air
Apr 21
ONT7:00 amOntario
24h 45m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
May 12
BKK11:30 pmBangkok Suvarnabhumi
31h 40m
2 stops
ONT5:10 pmOntario
$715

China Airlines flights from Ontario to Bangkok Suvarnabhumi Airport

Our best China Airlines deals on Ontario to Bangkok Suvarnabhumi Airport flight tickets
China Airlines
Sep 8
ONT12:45 amOntario
21h 25m
1 stop
BKK12:10 pmBangkok Suvarnabhumi
Sep 22
BKK1:20 pmBangkok Suvarnabhumi
18h 40m
1 stop
ONT6:00 pmOntario
$750
China Airlines
Sep 16
ONT12:10 amOntario
26h 10m
1 stop
BKK4:20 pmBangkok Suvarnabhumi
Sep 27
BKK10:50 amBangkok Suvarnabhumi
21h 10m
1 stop
ONT6:00 pmOntario
$752
China Airlines
May 11
ONT12:10 amOntario
22h 00m
1 stop
BKK12:10 pmBangkok Suvarnabhumi
May 26
BKK1:20 pmBangkok Suvarnabhumi
18h 40m
1 stop
ONT6:00 pmOntario
$761

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 March 24, 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 4/27

7:00 am-9:45 pm

2 stops24h 45m

Bangkok Suvarnabhumi

Tue 5/12

9:40 pm-5:10 pm

2 stops33h 30m

$687

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 4/27

7:00 am-9:45 pm

2 stops24h 45m

Bangkok Suvarnabhumi

Wed 5/13

11:30 pm-5:10 pm

2 stops31h 40m

$692

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 4/26

7:00 am-9:45 pm

2 stops24h 45m

Bangkok Suvarnabhumi

Tue 5/19

9:50 am-5:10 pm

2 stops21h 20m

$710

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 4/21

7:00 am-9:45 pm

2 stops24h 45m

Bangkok Suvarnabhumi

Tue 5/12

11:30 pm-5:10 pm

2 stops31h 40m

$715

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 9/9

7:00 am-1:05 am

2 stops28h 05m

Bangkok Suvarnabhumi

Sat 9/19

11:30 pm-11:44 pm

2 stops38h 14m

$722

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 9/9

7:00 am-11:35 pm

2 stops26h 35m

Bangkok Suvarnabhumi

Sat 9/19

11:30 pm-5:16 pm

2 stops31h 46m

$727

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 4/26

7:00 am-9:45 pm

2 stops24h 45m

Bangkok Suvarnabhumi

Tue 5/12

9:50 am-5:10 pm

2 stops21h 20m

$728

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 4/26

7:00 am-9:45 pm

2 stops24h 45m

Bangkok Suvarnabhumi

Tue 5/12

9:50 am-5:10 pm

2 stops21h 20m

$735
Quickest round-trip

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 9/8

12:45 am-12:10 pm

1 stop21h 25m

Bangkok Suvarnabhumi

Tue 9/22

1:20 pm-6:00 pm

1 stop18h 40m

$750

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 9/16

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

Sun 9/27

10:50 am-6:00 pm

1 stop21h 10m

$752

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 $788.

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 $699. 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 $1,065.

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 $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 $802 on momondo.

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

You could potentially save up to 1% 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 March 2026, prices for Ontario to Bangkok Suvarnabhumi Airport flights are approximately 17% 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

22h 15m

Direct flights

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

  • 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 22h 15m.

  • 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
8,321 reviews
Search Delta flights
Korean AirPriceFrom $616Free CancellationRating
8.4
1,202 reviews
Search Korean Air flights
China AirlinesPriceFrom $718Free CancellationRating
8.3
817 reviews
Search China Airlines flights
STARLUX AirlinesPriceFrom $763Free CancellationRating
9.0
292 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
Ayutthaya
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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