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$509+ Cheap flights from Busan (PUS) to Ontario (ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
PUS — ONT
Jul 23 — Jul 301
Wed 7/23
Wed 7/30
1 adult, Economy
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Cheap flight deals from Busan to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Busan (PUS) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 18, 2025.

Round-trip from

$850
(Korean Air)

One-way from

$509
(China Airlines)

Popular in

January

Cheapest in

March

Average price

$1,219
From Busan Gimhae to Ontario
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One-way flight from Busan Gimhae to Ontario
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Highest demand for flights based on searches. 6% potential increase in price ($70 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Busan to Ontario

Cheapest flights from Busan to Ontario
Explore the most affordable flight options available from Busan to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 18, 2025.

This Korean Air deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/14:30 pmPUS - ONT
2 stops40h 41mKorean Air
Mon 9/86:00 amONT - PUS
2 stops21h 35mKorean Air
Deal found 7/17$850
This Delta deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3110:40 amPUS - ONT
2 stops28h 02mDelta
Sun 9/76:00 amONT - PUS
2 stops22h 45mDelta
Deal found 7/16$910
This CheapTickets deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapTickets is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3110:20 amPUS - ONT
1 stop24h 20mChina Airlines
Sat 9/612:45 amONT - PUS
1 stop18h 30mChina Airlines
Deal found 7/16$1,036
This Kiwi.com deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/309:35 pmPUS - ONT
2 stops59h 30mMultiple Airlines
Sat 9/611:10 pmONT - PUS
1 stop28h 45mMultiple Airlines
Deal found 7/16$1,046

Cheapflights Fare Finder

Customize your flight search to find flights from Busan to Ontario 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, Cheapflights users made 2,558,603 searches. Data last updated July 18, 2025.
Use the filters below to find and compare flights from Busan to Ontario that are best for you.

Fly from

Busan

Fly to

Ontario

Route

Depart

Return

Price

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Mon 9/1

4:30 pm-5:11 pm

2 stops40h 41m

Ontario

Mon 9/8

6:00 am-7:35 pm

2 stops21h 35m

$850

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Sun 8/31

10:40 am-10:42 pm

2 stops28h 02m

Ontario

Sun 9/7

6:00 am-8:45 pm

2 stops22h 45m

$910

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Sun 8/31

10:20 am-6:40 pm

1 stop24h 20m

Ontario

Sat 9/6

12:45 am-11:15 am

1 stop18h 30m

$1,036

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Sat 8/30

9:35 pm-5:05 pm

2 stops59h 30m

Ontario

Sat 9/6

11:10 pm-7:55 pm

1 stop28h 45m

$1,046

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Tue 9/23

10:20 am-6:00 pm

1 stop23h 40m

$509

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Sun 10/5

5:45 pm-5:17 pm

2 stops39h 32m

$673

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Sun 10/5

9:15 pm-5:05 pm

3 stops35h 50m

$1,056

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/16

Best time to book a flight from Busan to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Busan with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Busan to Ontario

What is the cheapest month to book a flight from Busan to Ontario?

Currently, August is the cheapest month in which you can book a flight from Busan to Ontario (average of $246). Flying from Busan to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated July 18, 2025.
Get a feel of what it's like to fly with Korean Air, China Airlines, and Delta from Busan to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,109 reviews

Overall

8.4

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.2

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
Korean Air
8.4
Very good
1,109 reviews
Korean Air
8.4
Very good
1,109 reviews

Overall

8.4

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.2

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
China Airlines
8.2
Very good
745 reviews
Korean Air
8.4
Very good
1,109 reviews

Overall

8.4

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.2

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
Delta
8.0
Very good
7,958 reviews
Korean Air
8.4
Very good
1,109 reviews

Overall

8.4

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.2

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.

Related info for your journey

Find useful and relevant information for your journey from Busan to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find deals for flights from Busan to Ontario that include hotel bookings?

    Yes. In addition to deals on Busan to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Busan to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Busan to Ontario.

  • Can I find deals for business class flights from Busan to Ontario?

    Yes. Cheapflights offers flight deals from Busan to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Busan to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Busan to Ontario (average of $246). Flying from Busan to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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