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Cheap flights from Ontario to Bangkok from $365

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 10/28. 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
6:45 am - 11:20 pmONT-BKK
25h 35m2 stops
Korean Air Logo
11:15 pm - 3:20 pmBKK-ONT
31h 05m2 stops
$708Korean Air
Find Deal
dom., feb. 22 - dom., mar. 1
Delta Logo
7:35 am - 11:20 pmONT-BKK
25h 45m2 stops
Delta Logo
12:55 am - 5:08 pmBKK-ONT
31h 13m2 stops
$709Delta
Find Deal
mié., oct. 29 - mar., dic. 23
United Airlines Logo
5:10 am - 11:55 pmONT-BKK
28h 45m2 stops
United Airlines Logo
9:35 am - 10:52 pmBKK-ONT
51h 17m2 stops
$727United Airlines
Find Deal
dom., sep. 21 - mar., oct. 7
United Airlines Logo
5:10 am - 11:55 pmONT-BKK
28h 45m2 stops
United Airlines Logo
7:00 am - 10:52 pmBKK-ONT
29h 52m2 stops
$730United Airlines
Find Deal
lun., sep. 22 - jue., sep. 25
China Airlines Logo
11:50 pm - 1:05 pmONT-BKK
23h 15m1 stop
China Airlines Logo
10:55 am - 4:50 pmBKK-ONT
20h 55m1 stop
$752China Airlines
Find Deal
mar., oct. 28 - dom., nov. 9
China Airlines Logo
12:10 am - 9:50 amONT-BKK
19h 40m1 stop
China Airlines Logo
10:55 am - 4:50 pmBKK-ONT
20h 55m1 stop
$753China Airlines
Find Deal
vie., oct. 24 - dom., nov. 9
STARLUX Airlines Logo
9:45 pm - 12:35 pmONT-BKK
23h 50m1 stop
STARLUX Airlines Logo
1:45 pm - 4:30 pmBKK-ONT
17h 45m1 stop
$806STARLUX Airlines
Find Deal
sáb., nov. 8 - vie., ene. 23
STARLUX Airlines Logo
11:10 pm - 4:40 pmONT-BKK
27h 30m1 stop
STARLUX Airlines Logo
1:45 pm - 4:30 pmBKK-ONT
17h 45m1 stop
$808STARLUX Airlines
Find Deal
lun., oct. 6 - lun., nov. 3
Logo
12:10 am - 5:35 pmONT-DMK
27h 25m2 stops
Logo
7:40 am - 4:50 pmDMK-ONT
24h 10m2 stops
$976
Find Deal
jue., oct. 23 - lun., nov. 3
Logo
12:10 am - 11:15 pmONT-DMK
33h 05m2 stops
Logo
7:40 am - 5:50 pmDMK-ONT
24h 10m2 stops
$977
Find Deal
mié., oct. 8 - dom., oct. 26

United Airlines flights from Ontario to Bangkok

Our best United Airlines deals on Ontario to Bangkok flight tickets
United Airlines
Sep 21
ONT5:10 amOntario
28h 45m
2 stops
BKK11:55 pmBangkok Suvarnabhumi
Oct 7
BKK9:35 amBangkok Suvarnabhumi
51h 17m
2 stops
ONT10:52 pmOntario
$727
Find similar
United Airlines
Sep 17
ONT5:10 amOntario
28h 45m
2 stops
BKK11:55 pmBangkok Suvarnabhumi
Sep 24
BKK9:35 amBangkok Suvarnabhumi
46h 05m
2 stops
ONT5:40 pmOntario
$728
Find similar
United Airlines
Sep 22
ONT5:10 amOntario
28h 45m
2 stops
BKK11:55 pmBangkok Suvarnabhumi
Sep 25
BKK7:00 amBangkok Suvarnabhumi
29h 52m
2 stops
ONT10:52 pmOntario
$730
Find similar

STARLUX Airlines flights from Ontario to Bangkok

Our best STARLUX Airlines deals on Ontario to Bangkok flight tickets
STARLUX Airlines
Sep 17
ONT11:10 pmOntario
22h 50m
1 stop
BKK12:00 pmBangkok Suvarnabhumi
Oct 8
BKK1:10 pmBangkok Suvarnabhumi
17h 55m
1 stop
ONT5:05 pmOntario
$806
Find similar
STARLUX Airlines
Oct 6
ONT11:10 pmOntario
27h 30m
1 stop
BKK4:40 pmBangkok Suvarnabhumi
Nov 3
BKK1:45 pmBangkok Suvarnabhumi
17h 45m
1 stop
ONT4:30 pmOntario
$808
Find similar
STARLUX Airlines
Sep 17
ONT11:10 pmOntario
27h 30m
1 stop
BKK4:40 pmBangkok Suvarnabhumi
Sep 24
BKK1:10 pmBangkok Suvarnabhumi
17h 55m
1 stop
ONT5:05 pmOntario
$832
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Bangkok 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 septiembre 11, 2025.
Use the filters below to find and compare flights from Ontario to Bangkok that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

dom. 2/22

6:45 am-11:20 pm

2 stops25h 35m

Bangkok Suvarnabhumi

dom. 3/1

11:15 pm-3:20 pm

2 stops31h 05m

$708

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

mié. 10/29

7:35 am-11:20 pm

2 stops25h 45m

Bangkok Suvarnabhumi

mar. 12/23

12:55 am-5:08 pm

2 stops31h 13m

$709

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

dom. 9/21

5:10 am-11:55 pm

2 stops28h 45m

Bangkok Suvarnabhumi

mar. 10/7

9:35 am-10:52 pm

2 stops51h 17m

$727

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

lun. 9/22

5:10 am-11:55 pm

2 stops28h 45m

Bangkok Suvarnabhumi

jue. 9/25

7:00 am-10:52 pm

2 stops29h 52m

$730

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

mar. 10/28

11:50 pm-1:05 pm

1 stop23h 15m

Bangkok Suvarnabhumi

dom. 11/9

10:55 am-4:50 pm

1 stop20h 55m

$752

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

vie. 10/24

12:10 am-9:50 am

1 stop19h 40m

Bangkok Suvarnabhumi

dom. 11/9

10:55 am-4:50 pm

1 stop20h 55m

$753

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

sáb. 11/8

9:45 pm-12:35 pm

1 stop23h 50m

Bangkok Suvarnabhumi

vie. 1/23

1:45 pm-4:30 pm

1 stop17h 45m

$806

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

lun. 10/6

11:10 pm-4:40 pm

1 stop27h 30m

Bangkok Suvarnabhumi

lun. 11/3

1:45 pm-4:30 pm

1 stop17h 45m

$808

OntarioBangkok

ONT - DMK

ONTDMK

Ontario

jue. 10/23

12:10 am-5:35 pm

2 stops27h 25m

Bangkok Don Mueang Intl

lun. 11/3

7:40 am-4:50 pm

2 stops24h 10m

$976

OntarioBangkok

ONT - DMK

ONTDMK

Ontario

mié. 10/8

12:10 am-11:15 pm

2 stops33h 05m

Bangkok Don Mueang Intl

dom. 10/26

7:40 am-5:50 pm

2 stops24h 10m

$977

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

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?

If you aren’t able to travel during the month of September, then book flights to Bangkok from Ontario during August instead. Flights to Bangkok in August, while not as cheap as those in September, still average around $847.

What is the cheapest day to depart on your flight to Bangkok?

On average, the least expensive day to fly to Bangkok from Ontario is on a Thursday. momondo users have found tickets for Thursday departures for as low as $741. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Ontario to Bangkok on a Sunday will generally be more expensive and average around $936. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

According to our data, the cheapest time of day to fly to Bangkok is in the evening. momondo users have found flights departing from Ontario to Bangkok in the evening for as low as $741. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets at noon because they tend to be around $922. Of course, these prices can vary depending on the time of year and what airport you fly to.

How far in advance should I book a flight to Bangkok?

You are more likely to see cheaper flights to Bangkok from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Bangkok for around $1,011 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bangkok from Ontario for as low as $804 on momondo.

Cheap Ontario to Bangkok flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Bangkok

Direct flights

None
There are no direct flights from Ontario to Bangkok. There are no popular flight routes from Ontario to Bangkok.
Search flight deals

  • How far is Ontario to Bangkok by plane?

    A flight from Ontario to Bangkok will travel around 8282.1 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?

    Prices for flights from Ontario Airport to Bangkok refresh daily.

  • How many operators does momondo search for flights from Ontario Airport to Bangkok?

  • How old do you have to be to fly from Ontario Airport to Bangkok?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to Bangkok.

  • What documentation or ID do you need to fly to Bangkok?

    The travel and health documents you'll need for your trip to Bangkok may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Bangkok. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Ontario to Bangkok

Compare and see reviews for airlines that fly from Ontario to Bangkok 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
8,937 reviews
Search United Airlines flights
China AirlinesPriceFrom $798Free CancellationRating
8.3
767 reviews
Search China Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Bangkok?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Bangkok for you.

Can I find flights from Ontario to Bangkok with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Bangkok from Ontario with this policy.

How can momondo help me find flights from Ontario to Bangkok?

Once all potential Ontario to Bangkok flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to Bangkok right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Ontario to Bangkok now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Bangkok and let you know when they change.

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Find better results for your trip to Thailand

Fly into one of these airports located in Bangkok

Airports listed have a maximum distance of 15.4 mi from Bangkok
Bangkok Suvarnabhumi Airport
Bangkok Don Mueang Intl Airport