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Cheap flights from Ontario to Bangkok from $427

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 5/24. 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

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.
Delta Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Delta Logo
9:50 am - 10:40 pm
BKK
-
ONT
26h 50m
2 stops
$932Delta
Wed, Sep 2 - Tue, Sep 15
Korean Air Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Korean Air Logo
12:55 am - 5:17 pm
BKK
-
ONT
31h 22m
2 stops
$937Korean Air
Thu, Aug 13 - Mon, Nov 16
Delta Logo
1:00 pm - 1:05 am
ONT
-
BKK
46h 05m
2 stops
Delta Logo
12:55 am - 5:17 pm
BKK
-
ONT
31h 22m
2 stops
$938Delta
Sun, Aug 9 - Tue, Nov 17
Delta Logo
6:00 am - 11:35 pm
ONT
-
BKK
27h 35m
2 stops
Delta Logo
11:30 pm - 5:10 pm
BKK
-
ONT
31h 40m
2 stops
$955Delta
Tue, May 5 - Wed, May 20
Delta Logo
6:00 am - 11:35 pm
ONT
-
BKK
27h 35m
2 stops
Delta Logo
11:30 pm - 10:41 pm
BKK
-
ONT
37h 11m
2 stops
$956Delta
Tue, May 5 - Tue, Jun 9
Delta Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Delta Logo
9:50 am - 10:40 pm
BKK
-
ONT
26h 50m
2 stops
$958Delta
Mon, Aug 31 - Wed, Sep 23
Korean Air Logo
6:20 am - 9:45 pm
ONT
-
BKK
25h 25m
2 stops
Korean Air Logo
9:50 am - 5:16 pm
BKK
-
ONT
45h 26m
2 stops
$963Korean Air
Wed, Jul 22 - Tue, Aug 25
Delta Logo
7:00 am - 9:45 pm
ONT
-
BKK
24h 45m
2 stops
Delta Logo
9:40 am - 5:17 pm
BKK
-
ONT
21h 37m
2 stops
$968Delta
Mon, Oct 12 - Tue, Oct 27
Korean Air Logo
6:20 am - 9:45 pm
ONT
-
BKK
25h 25m
2 stops
Korean Air Logo
2:35 am - 5:16 pm
BKK
-
ONT
28h 41m
2 stops
$973Korean Air
Wed, Jul 22 - Tue, Aug 25
Multiple Airlines Logo
12:10 am - 7:30 pm
ONT
-
DMK
29h 20m
1 stop
Multiple Airlines Logo
6:15 am - 6:00 pm
DMK
-
ONT
25h 45m
1 stop
$1,201Multiple Airlines
Thu, May 7 - Tue, May 12

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Delta flights from Ontario to Bangkok

Our best Delta deals on Ontario to Bangkok flight tickets
Delta
Sep 2
ONT7:00 amOntario
24h 45m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
Sep 15
BKK9:50 amBangkok Suvarnabhumi
26h 50m
2 stops
ONT10:40 pmOntario
$932
Delta
Aug 9
ONT1:00 pmOntario
46h 05m
2 stops
BKK1:05 amBangkok Suvarnabhumi
Nov 17
BKK12:55 amBangkok Suvarnabhumi
31h 22m
2 stops
ONT5:17 pmOntario
$938
Delta
May 5
ONT6:00 amOntario
27h 35m
2 stops
BKK11:35 pmBangkok Suvarnabhumi
May 20
BKK11:30 pmBangkok Suvarnabhumi
31h 40m
2 stops
ONT5:10 pmOntario
$955

Korean Air flights from Ontario to Bangkok

Our best Korean Air deals on Ontario to Bangkok flight tickets
Korean Air
Apr 30
ONT7:00 amOntario
24h 45m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
May 25
BKK2:35 amBangkok Suvarnabhumi
28h 35m
2 stops
ONT5:10 pmOntario
$925
Korean Air
Aug 13
ONT7:00 amOntario
24h 45m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
Nov 16
BKK12:55 amBangkok Suvarnabhumi
31h 22m
2 stops
ONT5:17 pmOntario
$937
Korean Air
Jul 22
ONT6:20 amOntario
25h 25m
2 stops
BKK9:45 pmBangkok Suvarnabhumi
Aug 25
BKK9:50 amBangkok Suvarnabhumi
45h 26m
2 stops
ONT5:16 pmOntario
$963

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 April 23, 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 - BKK

ONTBKK

Ontario

Wed 9/2

7:00 am-9:45 pm

2 stops24h 45m

Bangkok Suvarnabhumi

Tue 9/15

9:50 am-10:40 pm

2 stops26h 50m

$932

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 8/13

7:00 am-9:45 pm

2 stops24h 45m

Bangkok Suvarnabhumi

Mon 11/16

12:55 am-5:17 pm

2 stops31h 22m

$937

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 8/9

1:00 pm-1:05 am

2 stops46h 05m

Bangkok Suvarnabhumi

Tue 11/17

12:55 am-5:17 pm

2 stops31h 22m

$938

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 5/5

6:00 am-11:35 pm

2 stops27h 35m

Bangkok Suvarnabhumi

Wed 5/20

11:30 pm-5:10 pm

2 stops31h 40m

$955

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 5/5

6:00 am-11:35 pm

2 stops27h 35m

Bangkok Suvarnabhumi

Tue 6/9

11:30 pm-10:41 pm

2 stops37h 11m

$956

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 8/31

7:00 am-9:45 pm

2 stops24h 45m

Bangkok Suvarnabhumi

Wed 9/23

9:50 am-10:40 pm

2 stops26h 50m

$958

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 7/22

6:20 am-9:45 pm

2 stops25h 25m

Bangkok Suvarnabhumi

Tue 8/25

9:50 am-5:16 pm

2 stops45h 26m

$963
Quickest round-trip

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 10/12

7:00 am-9:45 pm

2 stops24h 45m

Bangkok Suvarnabhumi

Tue 10/27

9:40 am-5:17 pm

2 stops21h 37m

$968

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 7/22

6:20 am-9:45 pm

2 stops25h 25m

Bangkok Suvarnabhumi

Tue 8/25

2:35 am-5:16 pm

2 stops28h 41m

$973

OntarioBangkok

ONT - DMK

ONTDMK

Ontario

Thu 5/7

12:10 am-7:30 pm

1 stop29h 20m

Bangkok Don Mueang Intl

Tue 5/12

6:15 am-6:00 pm

1 stop25h 45m

$1,201

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

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 Sunday. momondo users have found tickets for Sunday departures for as low as $795. 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 $1,353. 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 $958 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 $801 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

Fastest flight time

19h 35m

Direct flights

None
The fastest flight from Ontario to Bangkok takes 19h 35m
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 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
DeltaPriceFrom $457Free CancellationRating
7.9
8,439 reviews
Search Delta flights
Korean AirPriceFrom $616Free CancellationRating
8.4
1,212 reviews
Search Korean Air flights
China AirlinesPriceFrom $717Free CancellationRating
8.3
818 reviews
Search China Airlines flights
STARLUX AirlinesPriceFrom $763Free CancellationRating
8.9
301 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.

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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