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Cheap flights from Ontario to Bangkok from $314

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 3/2. 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
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.
Delta Logo
5:55 pm - 9:45 pm
ONT
-
BKK
37h 50m
2 stops
Delta Logo
11:30 pm - 10:19 pm
BKK
-
ONT
36h 49m
2 stops
$716Delta
Mon, Apr 20 - Wed, May 6
China Airlines Logo
12:10 am - 12:10 pm
ONT
-
BKK
22h 00m
1 stop
China Airlines Logo
1:20 pm - 6:00 pm
BKK
-
ONT
18h 40m
1 stop
$719China Airlines
Tue, Apr 7 - Thu, Apr 16
China Airlines Logo
12:10 am - 12:10 pm
ONT
-
BKK
22h 00m
1 stop
China Airlines Logo
10:50 am - 6:00 pm
BKK
-
ONT
21h 10m
1 stop
$720China Airlines
Tue, Apr 21 - Fri, May 1
China Airlines Logo
12:10 am - 9:45 am
ONT
-
BKK
19h 35m
1 stop
China Airlines Logo
1:20 pm - 6:00 pm
BKK
-
ONT
18h 40m
1 stop
$729China Airlines
Sat, May 9 - Tue, May 19
China Airlines Logo
12:10 am - 4:20 pm
ONT
-
BKK
26h 10m
1 stop
China Airlines Logo
1:20 pm - 6:00 pm
BKK
-
ONT
18h 40m
1 stop
$732China Airlines
Sat, Mar 28 - Tue, Apr 14
China Airlines Logo
12:10 am - 9:45 am
ONT
-
BKK
19h 35m
1 stop
China Airlines Logo
10:50 am - 6:00 pm
BKK
-
ONT
21h 10m
1 stop
$733China Airlines
Fri, May 1 - Tue, May 12
Delta Logo
7:30 am - 12:55 am
ONT
-
BKK
26h 25m
2 stops
Delta Logo
11:30 pm - 5:13 pm
BKK
-
ONT
31h 43m
2 stops
$736Delta
Mon, Mar 2 - Tue, Mar 31
China Airlines Logo
12:10 am - 4:20 pm
ONT
-
BKK
26h 10m
1 stop
China Airlines Logo
5:30 pm - 6:00 pm
BKK
-
ONT
38h 30m
1 stop
$737China Airlines
Tue, Mar 31 - Sun, Apr 19
China Airlines Logo
12:10 am - 12:10 pm
ONT
-
BKK
22h 00m
1 stop
China Airlines Logo
5:30 pm - 6:00 pm
BKK
-
ONT
38h 30m
1 stop
$738China Airlines
Sun, Mar 29 - Wed, May 6
China Airlines Logo
12:10 am - 12:10 pm
ONT
-
BKK
22h 00m
1 stop
China Airlines Logo
1:20 pm - 6:00 pm
BKK
-
ONT
18h 40m
1 stop
$739China Airlines
Sun, Mar 29 - Thu, Apr 16

United Airlines flights from Ontario to Bangkok Suvarnabhumi Airport

Our best United Airlines deals on Ontario to Bangkok Suvarnabhumi Airport flight tickets
United Airlines
Feb 9
ONT6:00 amOntario
38h 25m
2 stops
BKK11:25 amBangkok Suvarnabhumi
May 19
BKK9:35 amBangkok Suvarnabhumi
27h 24m
2 stops
ONT10:59 pmOntario
$733
United Airlines
Feb 25
ONT6:09 amOntario
38h 16m
2 stops
BKK11:25 amBangkok Suvarnabhumi
Mar 9
BKK4:55 pmBangkok Suvarnabhumi
38h 46m
2 stops
ONT5:41 pmOntario
$744
United Airlines
Feb 19
ONT6:10 amOntario
38h 15m
2 stops
BKK11:25 amBangkok Suvarnabhumi
May 10
BKK3:45 pmBangkok Suvarnabhumi
40h 07m
2 stops
ONT5:52 pmOntario
$746

China Airlines flights from Ontario to Bangkok Suvarnabhumi Airport

Our best China Airlines deals on Ontario to Bangkok Suvarnabhumi Airport flight tickets
China Airlines
Apr 7
ONT12:10 amOntario
22h 00m
1 stop
BKK12:10 pmBangkok Suvarnabhumi
Apr 16
BKK1:20 pmBangkok Suvarnabhumi
18h 40m
1 stop
ONT6:00 pmOntario
$719
China Airlines
Apr 21
ONT12:10 amOntario
22h 00m
1 stop
BKK12:10 pmBangkok Suvarnabhumi
May 1
BKK10:50 amBangkok Suvarnabhumi
21h 10m
1 stop
ONT6:00 pmOntario
$720
China Airlines
May 9
ONT12:10 amOntario
19h 35m
1 stop
BKK9:45 amBangkok Suvarnabhumi
May 19
BKK1:20 pmBangkok Suvarnabhumi
18h 40m
1 stop
ONT6:00 pmOntario
$729

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 February 4, 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

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 4/20

5:55 pm-9:45 pm

2 stops37h 50m

Bangkok Suvarnabhumi

Wed 5/6

11:30 pm-10:19 pm

2 stops36h 49m

$716

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 4/7

12:10 am-12:10 pm

1 stop22h 00m

Bangkok Suvarnabhumi

Thu 4/16

1:20 pm-6:00 pm

1 stop18h 40m

$719

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 4/21

12:10 am-12:10 pm

1 stop22h 00m

Bangkok Suvarnabhumi

Fri 5/1

10:50 am-6:00 pm

1 stop21h 10m

$720

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 5/9

12:10 am-9:45 am

1 stop19h 35m

Bangkok Suvarnabhumi

Tue 5/19

1:20 pm-6:00 pm

1 stop18h 40m

$729

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 3/28

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

Tue 4/14

1:20 pm-6:00 pm

1 stop18h 40m

$732

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Fri 5/1

12:10 am-9:45 am

1 stop19h 35m

Bangkok Suvarnabhumi

Tue 5/12

10:50 am-6:00 pm

1 stop21h 10m

$733

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 3/2

7:30 am-12:55 am

2 stops26h 25m

Bangkok Suvarnabhumi

Tue 3/31

11:30 pm-5:13 pm

2 stops31h 43m

$736

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 3/31

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

Sun 4/19

5:30 pm-6:00 pm

1 stop38h 30m

$737

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 3/29

12:10 am-12:10 pm

1 stop22h 00m

Bangkok Suvarnabhumi

Wed 5/6

5:30 pm-6:00 pm

1 stop38h 30m

$738

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 3/29

12:10 am-12:10 pm

1 stop22h 00m

Bangkok Suvarnabhumi

Thu 4/16

1:20 pm-6:00 pm

1 stop18h 40m

$739

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 January is, on average, the cheapest month to fly to Bangkok Suvarnabhumi Airport from Ontario, with most prices found around $769. 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 $968 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 21% 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 February 2026, prices for Ontario to Bangkok Suvarnabhumi Airport flights are approximately 14% 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

  • 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
7.9
8,146 reviews
Search Delta flights
Korean AirPriceFrom $616Free CancellationRating
8.4
1,188 reviews
Search Korean Air flights
China AirlinesPriceFrom $718Free CancellationRating
8.3
803 reviews
Search China Airlines flights
STARLUX AirlinesPriceFrom $756Free CancellationRating
8.9
269 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
Ayutthaya
Ko Lan
Chonburi
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.

An easier way to manage your Bangkok Suvarnabhumi Airport trip

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