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Cheap flights from Ontario to Bangkok from $385

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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 - 9:30 pmONT  Ontario-BKK Bangkok Suvarnabhumi
23h 30m2 stops Seattle/Tacoma Intl Incheon Intl
Korean Air Logo
11:30 pm - 5:17 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
31h 47m2 stops Incheon Intl Seattle/Tacoma Intl
$790Korean Air
Mon, Feb 1 - Mon, Apr 26
China Airlines Logo
10:50 pm - 4:45 pmONT  Ontario-BKK Bangkok Suvarnabhumi
26h 55m1 stop Taipei City Taiwan Taoyuan Intl
China Airlines Logo
5:50 pm - 5:05 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
38h 15m1 stop Taipei City Taiwan Taoyuan Intl
$811China Airlines
Sat, Feb 20 - Sat, Mar 6
China Airlines Logo
10:50 pm - 1:05 pmONT  Ontario-BKK Bangkok Suvarnabhumi
23h 15m1 stop Taipei City Taiwan Taoyuan Intl
China Airlines Logo
2:05 pm - 5:05 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
18h 00m1 stop Taipei City Taiwan Taoyuan Intl
$812China Airlines
Sun, Nov 1 - Sun, Nov 8
Delta Logo
6:00 am - 9:30 pmONT  Ontario-BKK Bangkok Suvarnabhumi
24h 30m2 stops Salt Lake City Incheon Intl
Delta Logo
9:50 am - 10:43 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
27h 53m2 stops Incheon Intl Seattle/Tacoma Intl
$822Delta
Thu, Jan 28 - Thu, Feb 25
Delta Logo
6:00 am - 9:30 pmONT  Ontario-BKK Bangkok Suvarnabhumi
24h 30m2 stops Salt Lake City Incheon Intl
Delta Logo
9:50 am - 10:43 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
27h 53m2 stops Incheon Intl Seattle/Tacoma Intl
$822Delta
Thu, Jan 28 - Mon, Mar 1
Korean Air Logo
6:00 am - 1:25 pmONT  Ontario-BKK Bangkok Suvarnabhumi
40h 25m2 stops Salt Lake City Incheon Intl
Korean Air Logo
9:40 pm - 5:19 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
34h 39m2 stops Incheon Intl Seattle/Tacoma Intl
$825Korean Air
Sun, Nov 1 - Sun, Nov 8
STARLUX Airlines Logo
9:45 pm - 4:30 pmONT  Ontario-BKK Bangkok Suvarnabhumi
27h 45m1 stop Taipei City Taiwan Taoyuan Intl
STARLUX Airlines Logo
1:45 pm - 3:55 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
17h 10m1 stop Taipei City Taiwan Taoyuan Intl
$868STARLUX Airlines
Mon, Nov 16 - Mon, Dec 14
STARLUX Airlines Logo
9:45 pm - 4:30 pmONT  Ontario-BKK Bangkok Suvarnabhumi
27h 45m1 stop Taipei City Taiwan Taoyuan Intl
STARLUX Airlines Logo
5:40 pm - 3:55 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
37h 15m1 stop Taipei City Taiwan Taoyuan Intl
$868STARLUX Airlines
Fri, Jan 8 - Mon, Feb 1
Multiple Airlines Logo
12:01 pm - 11:15 amONT  Ontario-BKK Bangkok Suvarnabhumi
32h 14m2 stops San Francisco Incheon Intl
Multiple Airlines Logo
12:25 pm - 7:28 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
22h 03m2 stops Incheon Intl San Francisco
$870Multiple Airlines
Mon, Nov 9 - Thu, Nov 12
Multiple Airlines Logo
7:00 am - 11:05 pmONT  Ontario-BKK Bangkok Suvarnabhumi
25h 05m2 stops Seattle/Tacoma Intl Incheon Intl
Multiple Airlines Logo
1:05 am - 5:15 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
31h 10m2 stops Incheon Intl Seattle/Tacoma Intl
$876Multiple Airlines
Tue, Nov 24 - Mon, Dec 14

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Korean Air flights from Ontario to Bangkok Suvarnabhumi Airport

Our best Korean Air deals on Ontario to Bangkok Suvarnabhumi Airport flight tickets
Korean Air
Feb 1
ONT7:00 amOntario
23h 30m
2 stops
BKK9:30 pmBangkok Suvarnabhumi
Apr 26
BKK11:30 pmBangkok Suvarnabhumi
31h 47m
2 stops
ONT5:17 pmOntario
$790
Korean Air
Nov 1
ONT6:00 amOntario
40h 25m
2 stops
BKK1:25 pmBangkok Suvarnabhumi
Nov 8
BKK9:40 pmBangkok Suvarnabhumi
34h 39m
2 stops
ONT5:19 pmOntario
$825
Korean Air
Jan 25
ONT7:00 amOntario
25h 05m
2 stops
BKK11:05 pmBangkok Suvarnabhumi
Mar 31
BKK9:50 amBangkok Suvarnabhumi
26h 53m
2 stops
ONT10:43 pmOntario
$827

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 24
ONT12:10 amOntario
19h 35m
1 stop
BKK9:45 amBangkok Suvarnabhumi
Oct 8
BKK10:50 amBangkok Suvarnabhumi
21h 10m
1 stop
ONT6:00 pmOntario
$805
China Airlines
Sep 24
ONT12:10 amOntario
19h 35m
1 stop
BKK9:45 amBangkok Suvarnabhumi
Oct 8
BKK10:50 amBangkok Suvarnabhumi
21h 10m
1 stop
ONT6:00 pmOntario
$806
China Airlines
Feb 20
ONT10:50 pmOntario
26h 55m
1 stop
BKK4:45 pmBangkok Suvarnabhumi
Mar 6
BKK5:50 pmBangkok Suvarnabhumi
38h 15m
1 stop
ONT5:05 pmOntario
$811

momondo Fare Finder

 
Use the filters below to find and compare flights from Ontario to Bangkok Suvarnabhumi Airport that are best for you.

Fly from

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Route

Depart

Return

Price

Cheapest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 2/1

7:00 am-9:30 pm

2 stops23h 30m

Bangkok Suvarnabhumi

Mon 4/26

11:30 pm-5:17 pm

2 stops31h 47m

$790

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sat 2/20

10:50 pm-4:45 pm

1 stop26h 55m

Bangkok Suvarnabhumi

Sat 3/6

5:50 pm-5:05 pm

1 stop38h 15m

$811
Quickest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sun 11/1

10:50 pm-1:05 pm

1 stop23h 15m

Bangkok Suvarnabhumi

Sun 11/8

2:05 pm-5:05 pm

1 stop18h 00m

$812

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Thu 1/28

6:00 am-9:30 pm

2 stops24h 30m

Bangkok Suvarnabhumi

Thu 2/25

9:50 am-10:43 pm

2 stops27h 53m

$822

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Thu 1/28

6:00 am-9:30 pm

2 stops24h 30m

Bangkok Suvarnabhumi

Mon 3/1

9:50 am-10:43 pm

2 stops27h 53m

$822

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sun 11/1

6:00 am-1:25 pm

2 stops40h 25m

Bangkok Suvarnabhumi

Sun 11/8

9:40 pm-5:19 pm

2 stops34h 39m

$825

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 11/16

9:45 pm-4:30 pm

1 stop27h 45m

Bangkok Suvarnabhumi

Mon 12/14

1:45 pm-3:55 pm

1 stop17h 10m

$868

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Fri 1/8

9:45 pm-4:30 pm

1 stop27h 45m

Bangkok Suvarnabhumi

Mon 2/1

5:40 pm-3:55 pm

1 stop37h 15m

$868

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 11/9

12:01 pm-11:15 am

2 stops32h 14m

Bangkok Suvarnabhumi

Thu 11/12

12:25 pm-7:28 pm

2 stops22h 03m

$870

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 11/24

7:00 am-11:05 pm

2 stops25h 05m

Bangkok Suvarnabhumi

Mon 12/14

1:05 am-5:15 pm

2 stops31h 10m

$876

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?

Prices are currently low for flights on this route.

Typical prices usually range from $808 to $920.
The lowest price recently found on this route was $790.

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 $767. The month of March is another great option to travel to Bangkok Suvarnabhumi Airport, with average flight prices from Ontario averaging around $791.

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 Wednesday when prices can be found for as low as $874. 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 $1,136.

How far in advance should I book a flight from Ontario 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 $992 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 $824 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 September 2026, prices for Ontario to Bangkok Suvarnabhumi Airport flights are approximately 75% more expensive 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

$385

Fastest flight time

20h 00m

Direct flights

None
The best one-way flight to Bangkok Suvarnabhumi Airport from Ontario in the past 72 hours is $385. The best round-trip flight deal from Ontario to Bangkok Suvarnabhumi Airport found on momondo in the last 72 hours is $790.
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

Frequently asked questions about flying from Ontario to Bangkok Suvarnabhumi Airport

  • 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 $427Free CancellationRating
7.8
8,594 reviews
Search Delta flights
Korean AirPriceFrom $455Free CancellationRating
8.4
1,218 reviews
Search Korean Air flights
China AirlinesPriceFrom $718Free CancellationRating
8.3
847 reviews
Search China Airlines flights
STARLUX AirlinesPriceFrom $731Free CancellationRating
8.7
387 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
Sattahip
Ko Lan
Ayutthaya
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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