Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Ontario to Bangkok from $392

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 11/10. 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

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
6:00 am - 1:05 amONT  Ontario-BKK Bangkok Suvarnabhumi
29h 05m2 stops Seattle/Tacoma Intl Incheon Intl
Korean Air Logo
9:50 am - 5:12 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
45h 22m2 stops Incheon Intl Seattle/Tacoma Intl
$731Korean Air
Sun, Oct 4 - Wed, Oct 14
STARLUX Airlines Logo
11:30 pm - 4:40 pmONT  Ontario-BKK Bangkok Suvarnabhumi
27h 10m1 stop Taipei City Taiwan Taoyuan Intl
STARLUX Airlines Logo
5:50 pm - 5:05 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
37h 15m1 stop Taipei City Taiwan Taoyuan Intl
$760STARLUX Airlines
Fri, Oct 2 - Tue, Oct 20
STARLUX Airlines Logo
9:45 pm - 12:35 pmONT  Ontario-BKK Bangkok Suvarnabhumi
23h 50m1 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
$760STARLUX Airlines
Mon, Nov 23 - Sun, Dec 20
Korean Air Logo
6:00 am - 9:45 pmONT  Ontario-BKK Bangkok Suvarnabhumi
25h 45m2 stops Seattle/Tacoma Intl Incheon Intl
Korean Air Logo
2:35 am - 5:12 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
28h 37m2 stops Incheon Intl Seattle/Tacoma Intl
$803Korean Air
Tue, Sep 29 - Mon, Oct 5
China Airlines Logo
10:50 pm - 4:45 pmONT  Ontario-BKK Bangkok Suvarnabhumi
26h 55m1 stop Taipei City Taiwan Taoyuan Intl
China Airlines Logo
2:35 am - 5:05 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
29h 30m1 stop Taipei City Taiwan Taoyuan Intl
$810China Airlines
Tue, Nov 10 - Tue, Nov 24
China Airlines Logo
12:10 am - 4:20 pmONT  Ontario-BKK Bangkok Suvarnabhumi
26h 10m1 stop Taipei City Taiwan Taoyuan Intl
China Airlines Logo
1:20 pm - 6:00 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
18h 40m1 stop Taipei City Taiwan Taoyuan Intl
$815China Airlines
Sat, Sep 26 - Tue, Oct 13
Delta Logo
6:20 am - 9:45 pmONT  Ontario-BKK Bangkok Suvarnabhumi
25h 25m2 stops Seattle/Tacoma Intl Incheon Intl
Delta Logo
9:50 am - 5:19 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
21h 29m2 stops Incheon Intl Seattle/Tacoma Intl
$822Delta
Mon, Sep 7 - Thu, Oct 1
Delta Logo
6:20 am - 9:45 pmONT  Ontario-BKK Bangkok Suvarnabhumi
25h 25m2 stops Seattle/Tacoma Intl Incheon Intl
Delta Logo
9:50 am - 11:47 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
27h 57m2 stops Incheon Intl Salt Lake City
$822Delta
Wed, Sep 2 - Tue, Sep 29
Multiple Airlines Logo
11:54 am - 11:35 pmONT  Ontario-BKK Bangkok Suvarnabhumi
45h 41m2 stops Seattle/Tacoma Intl Incheon Intl
Multiple Airlines Logo
9:40 pm - 10:43 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
39h 03m2 stops Incheon Intl Seattle/Tacoma Intl
$851Multiple Airlines
Sun, Sep 27 - Tue, Oct 13
United Airlines Logo
6:08 am - 4:35 amONT  Ontario-BKK Bangkok Suvarnabhumi
32h 27m2 stops San Francisco Tokyo Haneda
United Airlines Logo
9:35 am - 2:01 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
42h 26m2 stops Tokyo Haneda San Francisco
$888United Airlines
Fri, Sep 4 - Mon, Sep 14

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Korean Air flights from Ontario to Bangkok

Our best Korean Air deals on Ontario to Bangkok flight tickets
Korean Air
Oct 4
ONT6:00 amOntario
29h 05m
2 stops
BKK1:05 amBangkok Suvarnabhumi
Oct 14
BKK9:50 amBangkok Suvarnabhumi
45h 22m
2 stops
ONT5:12 pmOntario
$731
Korean Air
Sep 29
ONT6:00 amOntario
25h 45m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
Oct 5
BKK2:35 amBangkok Suvarnabhumi
28h 37m
2 stops
ONT5:12 pmOntario
$803
Korean Air
Sep 7
ONT6:20 amOntario
25h 25m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
Sep 10
BKK2:35 amBangkok Suvarnabhumi
34h 05m
2 stops
ONT10:40 pmOntario
$815

STARLUX Airlines flights from Ontario to Bangkok

Our best STARLUX Airlines deals on Ontario to Bangkok flight tickets
STARLUX Airlines
Oct 2
ONT11:30 pmOntario
27h 10m
1 stop
BKK4:40 pmBangkok Suvarnabhumi
Oct 20
BKK5:50 pmBangkok Suvarnabhumi
37h 15m
1 stop
ONT5:05 pmOntario
$760
STARLUX Airlines
Sep 19
ONT11:30 pmOntario
22h 30m
1 stop
BKK12:00 pmBangkok Suvarnabhumi
Oct 11
BKK5:50 pmBangkok Suvarnabhumi
37h 15m
1 stop
ONT5:05 pmOntario
$761
STARLUX Airlines
Sep 19
ONT11:30 pmOntario
22h 30m
1 stop
BKK12:00 pmBangkok Suvarnabhumi
Oct 3
BKK1:10 pmBangkok Suvarnabhumi
17h 55m
1 stop
ONT5:05 pmOntario
$764

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 August 17, 2026.
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

Cheapest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sun 10/4

6:00 am-1:05 am

2 stops29h 05m

Bangkok Suvarnabhumi

Wed 10/14

9:50 am-5:12 pm

2 stops45h 22m

$731

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Fri 10/2

11:30 pm-4:40 pm

1 stop27h 10m

Bangkok Suvarnabhumi

Tue 10/20

5:50 pm-5:05 pm

1 stop37h 15m

$760

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 11/23

9:45 pm-12:35 pm

1 stop23h 50m

Bangkok Suvarnabhumi

Sun 12/20

5:40 pm-3:55 pm

1 stop37h 15m

$760

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 9/29

6:00 am-9:45 pm

2 stops25h 45m

Bangkok Suvarnabhumi

Mon 10/5

2:35 am-5:12 pm

2 stops28h 37m

$803

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Tue 11/10

10:50 pm-4:45 pm

1 stop26h 55m

Bangkok Suvarnabhumi

Tue 11/24

2:35 am-5:05 pm

1 stop29h 30m

$810
Quickest round-trip

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sat 9/26

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

Tue 10/13

1:20 pm-6:00 pm

1 stop18h 40m

$815

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Mon 9/7

6:20 am-9:45 pm

2 stops25h 25m

Bangkok Suvarnabhumi

Thu 10/1

9:50 am-5:19 pm

2 stops21h 29m

$822

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Wed 9/2

6:20 am-9:45 pm

2 stops25h 25m

Bangkok Suvarnabhumi

Tue 9/29

9:50 am-11:47 pm

2 stops27h 57m

$822

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Sun 9/27

11:54 am-11:35 pm

2 stops45h 41m

Bangkok Suvarnabhumi

Tue 10/13

9:40 pm-10:43 pm

2 stops39h 03m

$851

OntarioBangkok

ONT Ontario - BKK Bangkok Suvarnabhumi

ONTBKK

Ontario

Fri 9/4

6:08 am-4:35 am

2 stops32h 27m

Bangkok Suvarnabhumi

Mon 9/14

9:35 am-2:01 pm

2 stops42h 26m

$888

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 typical price of a round-trip flight between Ontario and Bangkok?

Prices are currently low for flights on this route.

Typical prices usually range from $862 to $1,100.
The lowest price recently found on this route was $731.

What is the cheapest month to fly to Bangkok?

If you aren’t able to travel during the month of January, then book flights to Bangkok from Ontario during February instead. Flights to Bangkok in February, while not as cheap as those in January, still average around $783.

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 Tuesday. momondo users have found tickets for Tuesday departures for as low as $892. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Ontario to Bangkok on a Friday will generally be more expensive and average around $1,197. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

How far in advance should I book a flight from Ontario 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 $987 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 $786 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

Best Price Found

$392

Fastest flight time

22h 05m

Direct flights

None
The best one-way flight to Bangkok from Ontario in the past 72 hours is $392. The best round-trip flight deal from Ontario to Bangkok found on momondo in the last 72 hours is $731.
The fastest flight from Ontario to Bangkok takes 22h 05m
There are no direct flights from Ontario to Bangkok. There are no popular flight routes from Ontario to Bangkok.
Search flight deals

Frequently asked questions about flying from Ontario to Bangkok

  • 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 22h 05m.

  • 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
DeltaPriceFrom $427Free CancellationRating
7.8
8,504 reviews
Search Delta flights
Korean AirPriceFrom $455Free CancellationRating
8.4
1,221 reviews
Search Korean Air flights
China AirlinesPriceFrom $718Free CancellationRating
8.3
841 reviews
Search China Airlines flights
STARLUX AirlinesPriceFrom $731Free CancellationRating
8.8
371 reviews
Search STARLUX 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.

An easier way to manage your Bangkok trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 9/16
Wed 9/23
By creating a price alert you accept our terms of use and privacy policy.

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