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£405 Cheap Flights from Ontario Intl. Airport (ONT) to Busan (PUS)

View £405 flight on Fri, 2 Oct 2026Opens in a new window

Popular airlines from Ontario Intl. Airport (ONT) to Gimhae Airport (PUS)

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Cheap Flights from Ontario Intl. Airport (ONT) to Busan (PUS)

Prices were available within the past 7 days and start at £405 for one-way flights and £904 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Fri, 2 Oct - Mon, 12 Oct
ONT
Ontario
PUS
Busan
£904 Return, found 4 days ago
£904
Return
found 4 days ago
Select Alaska Airlines flight, departing Fri, 2 Oct from Ontario to Busan, returning Mon, 12 Oct, priced at £904 found 4 days ago
Alaska Airlines
Fri, 2 Oct - Mon, 12 Oct
ONT
Ontario
PUS
Busan
£941 Return, found 4 days ago
£941
Return
found 4 days ago
Select Alaska Airlines flight, departing Fri, 2 Oct from Ontario to Busan, returning Mon, 12 Oct, priced at £941 found 4 days ago
Alaska Airlines
Thu, 1 Oct - Mon, 12 Oct
ONT
Ontario
PUS
Busan
£965 Return, found 4 days ago
£965
Return
found 4 days ago
Select Alaska Airlines flight, departing Thu, 1 Oct from Ontario to Busan, returning Mon, 12 Oct, priced at £965 found 4 days ago
Alaska Airlines
Thu, 1 Oct - Mon, 12 Oct
ONT
Ontario
PUS
Busan
£978 Return, found 4 days ago
£978
Return
found 4 days ago
Select Alaska Airlines flight, departing Thu, 1 Oct from Ontario to Busan, returning Mon, 12 Oct, priced at £978 found 4 days ago
China Airlines
Fri, 2 Oct - Mon, 12 Oct
ONT
Ontario
PUS
Busan
£995 Return, found 4 days ago
£995
Return
found 4 days ago
Select China Airlines flight, departing Fri, 2 Oct from Ontario to Busan, returning Mon, 12 Oct, priced at £995 found 4 days ago
China Airlines
Fri, 2 Oct - Mon, 12 Oct
ONT
Ontario
PUS
Busan
£1,002 Return, found 4 days ago
£1,002
Return
found 4 days ago
Select China Airlines flight, departing Fri, 2 Oct from Ontario to Busan, returning Mon, 12 Oct, priced at £1,002 found 4 days ago
China Airlines
Fri, 2 Oct - Mon, 12 Oct
ONT
Ontario
PUS
Busan
£1,025 Return, found 4 days ago
£1,025
Return
found 4 days ago
Select China Airlines flight, departing Fri, 2 Oct from Ontario to Busan, returning Mon, 12 Oct, priced at £1,025 found 4 days ago
China Airlines
Thu, 1 Oct - Mon, 12 Oct
ONT
Ontario
PUS
Busan
£1,032 Return, found 4 days ago
£1,032
Return
found 4 days ago
Select China Airlines flight, departing Thu, 1 Oct from Ontario to Busan, returning Mon, 12 Oct, priced at £1,032 found 4 days ago
Korean Air
Thu, 1 Oct - Mon, 12 Oct
ONT
Ontario
PUS
Busan
£1,070 Return, found 4 days ago
£1,070
Return
found 4 days ago
Select Korean Air flight, departing Thu, 1 Oct from Ontario to Busan, returning Mon, 12 Oct, priced at £1,070 found 4 days ago
STARLUX Airlines
Fri, 2 Oct - Mon, 12 Oct
ONT
Ontario
PUS
Busan
£4,026 Return, found 4 days ago
£4,026
Return
found 4 days ago
Select STARLUX Airlines flight, departing Fri, 2 Oct from Ontario to Busan, returning Mon, 12 Oct, priced at £4,026 found 4 days ago

Frequently asked questions

How much does a flight from Ontario Intl. Airport (ONT) to Busan (PUS-Gimhae) cost?
You can find one-way and return flights from ONT to PUS with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when ONT to PUS ticket fares go up or down.
What is the cheapest month to fly from Ontario Intl. Airport (ONT) to Busan (PUS-Gimhae)?
The cheapest months to fly from ONT to PUS are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Ontario Intl. Airport (ONT) to Busan (PUS)?
Enter ONT to PUS and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Ontario Intl. Airport (ONT) to Busan (PUS-Gimhae)?
Alaska Airlines is one of the cheapest airlines offering connecting return flights from Ontario Intl. Airport (ONT) to Busan (PUS-Gimhae), with prices starting from around £959 for flights that can be booked for departure within the next year. These flights typically include a layover in Seattle - Tacoma Intl. (SEA). All prices are per adult for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from Ontario Intl. Airport (ONT) to Busan (PUS-Gimhae)?
To find a cheap flight from Ontario Intl. Airport (ONT) to Busan (PUS-Gimhae), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Ontario Intl. Airport (ONT) to Busan (PUS-Gimhae)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Ontario Intl. Airport (ONT) to Busan (PUS-Gimhae)?
There are approximately 11 connecting flights per day from Ontario Intl. Airport (ONT) to Busan (PUS-Gimhae). Some common connection points include Seattle - Tacoma Intl. (SEA), San Francisco Intl. (SFO), and Salt Lake City Intl. (SLC).
What is the earliest flight from Ontario Intl. Airport (ONT) to Busan (PUS)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from Ontario Intl. Airport (ONT) to Busan (PUS). To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Ontario Intl. Airport (ONT) to Busan (PUS-Gimhae)?
You'll typically find the most flights from Ontario Intl. Airport (ONT) to Busan (PUS-Gimhae) on a Sunday, with around 22 flights available. This gives you a good selection of options for your journey. Major airlines on this route include Delta, United, and Alaska Airlines. Sundays offer notably more flight options compared to other days of the week, such as Friday which has around 16 flights.
What are the most popular departure times for flights from Ontario Intl. Airport (ONT) to Busan (PUS-Gimhae)?
The most popular departure times for flights from Ontario Intl. Airport (ONT) to Busan (PUS-Gimhae) are in the morning, from 6am to 9am. Many major carriers, including Delta, United and Alaska Airlines, offer flights during this window. Many travellers prefer these early morning flights as they allow you to arrive at your destination with plenty of time to settle in and start your day.
How long does it take to fly from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Busan (PUS-Gimhae)?
Flying from ONT to PUS with a connection usually takes about 19 hours, traveling roughly 9,671 kilometers. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Ontario Intl. Airport (ONT) to Busan (PUS-Gimhae)?
You can fly business class between ONT and PUS. You can fly business class with China Airlines.
How do I earn miles on a Ontario Intl. Airport (ONT) to Busan (PUS) flight with Expedia?
It's easy to earn miles on a Ontario Intl. Airport (ONT) to Busan (PUS) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from Ontario Intl. Airport (ONT) to Busan (PUS) at the last minute?
Typically, booking a last minute flight from Ontario Intl. Airport (ONT) to Busan (PUS) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Ontario Intl. Airport (ONT) to Busan (PUS) flight and hotel package?
Securing a Ontario Intl. Airport (ONT) to Busan (PUS) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Ontario Intl. Airport (ONT) to Busan (PUS-Gimhae)?
If you booked your Ontario Intl. Airport (ONT) to Busan (PUS-Gimhae) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Ontario Intl. Airport
Destination airport
Gimhae
Return price
£904
Distance
9613 km

Book with confidence

Compare flights from Ontario Intl. Airport to Busan easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Ontario Intl. Airport to Busan. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Gimhae in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Ontario Intl. Airport to Gimhae.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Ontario Intl. Airport (ONT) to Gimhae (PUS)

The easiest way to view the best deals on flights from Ontario Intl. Airport to Busan today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Ontario Intl. Airport to Gimhae start at just £904 and range up to £4,026.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Ontario Intl. Airport and Busan
  • booking your flight during October, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Ontario Intl. Airport to Busan flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Ontario Intl. Airport to Gimhae for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Ontario Intl. Airport to Busan easily and book with confidence

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