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Cheap flights from Ontario to Bangkok from $371

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 4/4. 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.
China Airlines Logo
12:10 am - 12:10 pmONT-BKK
22h 00m1 stop
China Airlines Logo
1:20 pm - 6:00 pmBKK-ONT
18h 40m1 stop
$739China Airlines
Find Deal
mié., abr. 1 - lun., abr. 13
China Airlines Logo
11:50 pm - 4:45 pmONT-BKK
26h 55m1 stop
China Airlines Logo
10:50 am - 6:40 pmBKK-ONT
21h 50m1 stop
$740China Airlines
Find Deal
lun., mar. 9 - lun., jul. 13
United Airlines Logo
8:55 pm - 5:10 amONT-BKK
41h 15m2 stops
United Airlines Logo
4:55 pm - 12:17 pmBKK-ONT
33h 22m2 stops
$743United Airlines
Find Deal
lun., feb. 23 - lun., mar. 9
United Airlines Logo
6:00 am - 11:25 amONT-BKK
38h 25m2 stops
United Airlines Logo
4:55 pm - 10:53 pmBKK-ONT
20h 58m2 stops
$750United Airlines
Find Deal
mar., ene. 13 - mié., ene. 28
Delta Logo
6:45 am - 12:45 amONT-BKK
27h 00m2 stops
Delta Logo
9:40 am - 5:07 pmBKK-ONT
46h 27m2 stops
$759Delta
Find Deal
vie., nov. 28 - sáb., dic. 6
Delta Logo
5:49 pm - 12:45 amONT-BKK
39h 56m2 stops
Delta Logo
2:05 am - 5:09 pmBKK-ONT
30h 04m2 stops
$764Delta
Find Deal
dom., nov. 16 - lun., nov. 24
Korean Air Logo
7:30 am - 12:55 amONT-BKK
26h 25m2 stops
Korean Air Logo
2:05 am - 1:56 pmBKK-ONT
26h 51m2 stops
$765Korean Air
Find Deal
mar., ene. 13 - sáb., ene. 24
Korean Air Logo
6:38 am - 12:55 amONT-BKK
27h 17m2 stops
Korean Air Logo
12:55 am - 1:56 pmBKK-ONT
28h 01m2 stops
$798Korean Air
Find Deal
dom., dic. 28 - jue., ene. 22
STARLUX Airlines Logo
9:45 pm - 12:35 pmONT-BKK
23h 50m1 stop
STARLUX Airlines Logo
5:40 pm - 3:50 pmBKK-ONT
37h 10m1 stop
$803STARLUX Airlines
Find Deal
mié., feb. 11 - dom., mar. 1
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
$812STARLUX Airlines
Find Deal
lun., nov. 24 - mar., dic. 9

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 1
ONT12:10 amOntario
22h 00m
1 stop
BKK12:10 pmBangkok Suvarnabhumi
Apr 13
BKK1:20 pmBangkok Suvarnabhumi
18h 40m
1 stop
ONT6:00 pmOntario
$739
Find similar
China Airlines
Mar 9
ONT11:50 pmOntario
26h 55m
1 stop
BKK4:45 pmBangkok Suvarnabhumi
Jul 13
BKK10:50 amBangkok Suvarnabhumi
21h 50m
1 stop
ONT6:40 pmOntario
$740
Find similar
China Airlines
Jan 5
ONT10:50 pmOntario
20h 00m
1 stop
BKK9:50 amBangkok Suvarnabhumi
Jan 18
BKK2:35 amBangkok Suvarnabhumi
29h 15m
1 stop
ONT4:50 pmOntario
$741
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
Feb 23
ONT8:55 pmOntario
41h 15m
2 stops
BKK5:10 amBangkok Suvarnabhumi
Mar 9
BKK4:55 pmBangkok Suvarnabhumi
33h 22m
2 stops
ONT12:17 pmOntario
$743
Find similar
United Airlines
Jan 13
ONT6:00 amOntario
38h 25m
2 stops
BKK11:25 amBangkok Suvarnabhumi
Jan 28
BKK4:55 pmBangkok Suvarnabhumi
20h 58m
2 stops
ONT10:53 pmOntario
$750
Find similar
United Airlines
Nov 17
ONT6:38 pmOntario
49h 47m
2 stops
BKK11:25 amBangkok Suvarnabhumi
Nov 22
BKK4:55 pmBangkok Suvarnabhumi
34h 42m
2 stops
ONT12:37 pmOntario
$756
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 noviembre 2, 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

mié. 4/1

12:10 am-12:10 pm

1 stop22h 00m

Bangkok Suvarnabhumi

lun. 4/13

1:20 pm-6:00 pm

1 stop18h 40m

$739

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

lun. 3/9

11:50 pm-4:45 pm

1 stop26h 55m

Bangkok Suvarnabhumi

lun. 7/13

10:50 am-6:40 pm

1 stop21h 50m

$740

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

lun. 2/23

8:55 pm-5:10 am

2 stops41h 15m

Bangkok Suvarnabhumi

lun. 3/9

4:55 pm-12:17 pm

2 stops33h 22m

$743

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

mar. 1/13

6:00 am-11:25 am

2 stops38h 25m

Bangkok Suvarnabhumi

mié. 1/28

4:55 pm-10:53 pm

2 stops20h 58m

$750

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

vie. 11/28

6:45 am-12:45 am

2 stops27h 00m

Bangkok Suvarnabhumi

sáb. 12/6

9:40 am-5:07 pm

2 stops46h 27m

$759

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

dom. 11/16

5:49 pm-12:45 am

2 stops39h 56m

Bangkok Suvarnabhumi

lun. 11/24

2:05 am-5:09 pm

2 stops30h 04m

$764

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

mar. 1/13

7:30 am-12:55 am

2 stops26h 25m

Bangkok Suvarnabhumi

sáb. 1/24

2:05 am-1:56 pm

2 stops26h 51m

$765

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

dom. 12/28

6:38 am-12:55 am

2 stops27h 17m

Bangkok Suvarnabhumi

jue. 1/22

12:55 am-1:56 pm

2 stops28h 01m

$798

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

mié. 2/11

9:45 pm-12:35 pm

1 stop23h 50m

Bangkok Suvarnabhumi

dom. 3/1

5:40 pm-3:50 pm

1 stop37h 10m

$803

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

lun. 11/24

9:45 pm-4:30 pm

1 stop27h 45m

Bangkok Suvarnabhumi

mar. 12/9

5:40 pm-3:50 pm

1 stop37h 10m

$812

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 August is, on average, the cheapest month to fly to Bangkok Suvarnabhumi Airport from Ontario, with most prices found around $807. The month of October is another great option to travel to Bangkok Suvarnabhumi Airport, with average flight prices from Ontario averaging around $821.

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, Monday 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 $896.

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 $1,015 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 $770 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 November 2025, 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

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.
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 $732Free CancellationRating
8.4
1,157 reviews
Search Korean Air flights
China AirlinesPriceFrom $764Free CancellationRating
8.3
776 reviews
Search China Airlines flights
United AirlinesPriceFrom $778Free CancellationRating
7.4
8,994 reviews
Search United Airlines flights
STARLUX AirlinesPriceFrom $787Free CancellationRating
8.9
219 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
Chonburi
Ayutthaya
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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