HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Busan

$552+ Cheap flights from Ontario (ONT) to Busan (PUS)

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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PUS
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Busan with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Busan

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Busan (PUS). 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 August 20, 2025.

Round-trip from

$943
(oojo)

One-way from

$552
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$1,349
From Ontario to Busan Gimhae
Search Deals
One-way flight from Ontario to Busan Gimhae
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($180 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($62 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

Find flight deals from Ontario to Busan

Cheapest flights from Ontario to Busan
Explore the most affordable flight options available from Ontario to Busan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2025.

This oojo deal was found by Cheapflights users on 8/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1512:10 amONT - PUS
1 stop26h 50mChina Airlines
Tue 11/1110:10 amPUS - ONT
1 stop23h 40mChina Airlines
Deal found 8/18$943
This oojo deal was found by Cheapflights users on 8/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2712:10 amONT - PUS
1 stop26h 50mChina Airlines
Mon 11/311:50 amPUS - ONT
1 stop22h 00mChina Airlines
Deal found 8/19$944
This FlightHub deal was found by Cheapflights users on 8/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2612:10 amONT - PUS
1 stop19h 05mChina Airlines
Tue 11/411:50 amPUS - ONT
1 stop22h 00mChina Airlines
Deal found 8/19$954
This FlightHub deal was found by Cheapflights users on 8/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2712:10 amONT - PUS
1 stop19h 05mChina Airlines
Tue 10/2810:10 amPUS - ONT
1 stop23h 40mChina Airlines
Deal found 8/19$975
This Trip.com deal was found by Cheapflights users on 8/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/75:10 amONT - PUS
2 stops22h 05mMultiple Airlines
Sun 9/217:45 amPUS - ONT
2 stops25h 52mMultiple Airlines
Deal found 8/19$978
This Gurufare deal was found by Cheapflights users on 8/19. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2812:10 amONT - PUS
1 stop19h 05mChina Airlines
Mon 11/311:50 amPUS - ONT
1 stop22h 00mChina Airlines
Deal found 8/19$990
This China Airlines deal was found by Cheapflights users on 8/19. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2912:10 amONT - PUS
1 stop26h 50mChina Airlines
Fri 10/3111:50 amPUS - ONT
1 stop22h 00mChina Airlines
Deal found 8/19$992
This oojo deal was found by Cheapflights users on 8/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2611:50 pmONT - PUS
1 stop19h 00mChina Airlines
Tue 11/1111:50 amPUS - ONT
1 stop22h 00mChina Airlines
Deal found 8/19$1,015
This oojo deal was found by Cheapflights users on 8/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/3012:10 amONT - PUS
1 stop19h 05mChina Airlines
Wed 10/1510:20 amPUS - ONT
1 stop23h 40mChina Airlines
Deal found 8/19$1,017
This oojo deal was found by Cheapflights users on 8/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/212:10 amONT - PUS
1 stop26h 50mChina Airlines
Thu 10/3011:50 amPUS - ONT
1 stop22h 00mChina Airlines
Deal found 8/18$1,037
This FlightHub deal was found by Cheapflights users on 8/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2511:50 pmONT - PUS
1 stop19h 00mChina Airlines
Mon 11/1011:50 amPUS - ONT
1 stop22h 00mChina Airlines
Deal found 8/19$1,063

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Busan 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 August 20, 2025.
Use the filters below to find and compare flights from Ontario to Busan that are best for you.

Fly from

Ontario

Fly to

Busan

Route

Depart

Return

Price

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Wed 10/15

12:10 am-7:00 pm

1 stop26h 50m

Busan Gimhae

Tue 11/11

10:10 am-4:50 pm

1 stop23h 40m

$943

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sat 9/27

12:10 am-7:00 pm

1 stop26h 50m

Busan Gimhae

Mon 11/3

11:50 am-4:50 pm

1 stop22h 00m

$944

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sun 9/28

12:10 am-7:00 pm

1 stop26h 50m

Busan Gimhae

Tue 10/28

10:10 am-5:50 pm

1 stop23h 40m

$944

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sat 9/27

12:10 am-11:15 am

1 stop19h 05m

Busan Gimhae

Sat 11/1

11:50 am-5:50 pm

1 stop22h 00m

$944

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Wed 11/5

10:50 pm-6:50 pm

1 stop27h 00m

Busan Gimhae

Wed 11/19

11:50 am-4:50 pm

1 stop22h 00m

$944

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sat 9/27

12:10 am-7:00 pm

1 stop26h 50m

Busan Gimhae

Tue 10/28

10:10 am-5:50 pm

1 stop23h 40m

$944

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Fri 9/26

12:10 am-11:15 am

1 stop19h 05m

Busan Gimhae

Sun 11/2

10:10 am-5:50 pm

1 stop23h 40m

$954

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sun 9/28

12:10 am-11:15 am

1 stop19h 05m

Busan Gimhae

Tue 11/4

11:50 am-4:50 pm

1 stop22h 00m

$954

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Fri 9/26

12:10 am-11:15 am

1 stop19h 05m

Busan Gimhae

Mon 11/3

11:50 am-4:50 pm

1 stop22h 00m

$954

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Fri 9/26

12:10 am-11:15 am

1 stop19h 05m

Busan Gimhae

Tue 10/28

10:10 am-5:50 pm

1 stop23h 40m

$954

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/19

Showing 1-10 of 20 results
1
2

Best time to book a flight from Ontario to Busan

Have a flexible travel schedule? Discover the best time to fly to Busan from Ontario 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 Ontario to Busan

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

Currently, August is the cheapest month in which you can book a flight from Ontario to Busan (average of $1,166). Flying from Ontario to Busan in December is currently the most expensive (average of $2,247). 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 Busan

Get insights into the airlines that provide service to Busan. 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 Busan. Reviews last updated August 20, 2025.
Get a feel of what it's like to fly with China Airlines from Ontario to Busan by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
China Airlines
8.3
Very good
764 reviews

Overall

8.3

Food

7.8

Boarding

8.3

Crew

8.5

Entertainment

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.
China Airlines
8.3
Very good
764 reviews
China Airlines
8.3
Very good
764 reviews

Overall

8.3

Food

7.8

Boarding

8.3

Crew

8.5

Entertainment

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.

Related info for your journey

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

  • How long is the flight from Ontario to Busan?

    Departing from Ontario to Busan will take you 26h 50m. The distance from Ontario to Busan is about 6004 mi.

  • What is the cheapest airline to fly from Ontario to Busan round-trip?

    Cheapflights users have booked flights from Ontario to Busan round-trip from $930.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Busan 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 Ontario to Busan?

    Currently, August is the cheapest month in which you can book a flight from Ontario to Busan (average of $1,166). Flying from Ontario to Busan in December is currently the most expensive (average of $2,247). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Busan

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Incheon Intl flights
San Francisco to Incheon Intl flights
Los Angeles to Gimpo Intl flights
San Francisco to Gimpo Intl flights
Ontario to Incheon Intl flights
Santa Ana to Incheon Intl flights
San Jose to Incheon Intl flights
Burbank to Incheon Intl flights
Las Vegas to Incheon Intl flights
San Diego to Incheon Intl flights
Oakland to Incheon Intl flights
Las Vegas to Gimpo Intl flights
San Diego to Gimpo Intl flights
Los Angeles to Busan flights
San Jose to Gimpo Intl flights
Long Beach to Incheon Intl flights
Sacramento to Incheon Intl flights
Ontario to Gimpo Intl flights
San Francisco to Busan flights
Los Angeles to Jeju City flights
Long Beach to Gimpo Intl flights
San Jose to Busan flights
Reno to Incheon Intl flights
San Diego to Busan flights
Palm Springs to Incheon Intl flights
Monterey to Incheon Intl flights
Los Angeles to Daegu flights
Santa Ana to Busan flights
Medford to Incheon Intl flights
Santa Barbara to Incheon Intl flights
Oakland to Busan flights
San Jose to Jeju City flights
San Francisco to Cheongju flights
San Francisco to Jeju City flights
Los Angeles to Cheongju flights
Las Vegas to Busan flights
Fresno to Busan flights
San Diego to Jeju City flights
San Francisco to Ulsan flights

Top airline flying from Ontario to Busan

Discover the top airline that operate flights from Ontario to Busan. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$930Average$1,072FlexibilityNo cancel feeOn-time70%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.