HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Jeju City

$1,457+ Cheap flights from Ontario (ONT) to Jeju City (CJU)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CJU
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Jeju City 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 Jeju City

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Jeju City (CJU). 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 September 15, 2025.

Round-trip from

$1,457
(lastminute.com)

Popular in

December

Cheapest in

September

Average price

$995
From Ontario to Jeju City
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($459 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($116 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Ontario to Jeju City

Cheapest flights from Ontario to Jeju City
Explore the most affordable flight options available from Ontario to Jeju City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This lastminute.com deal was found by Cheapflights users on 9/15. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:45 amONT - CJU
2 stops20h 15mKorean Air
Fri 11/2110:35 amCJU - ONT
2 stops23h 34mKorean Air
Deal found 9/15$1,457

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Jeju City 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 September 15, 2025.
Use the filters below to find and compare flights from Ontario to Jeju City that are best for you.

Fly from

Ontario

Fly to

Jeju City

Route

Depart

Return

Price

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Thu 11/13

6:45 am-8:00 pm

2 stops20h 15m

Jeju City

Fri 11/21

10:35 am-5:09 pm

2 stops23h 34m

$1,457

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Mon 10/20

12:10 am-6:10 pm

2 stops26h 00m

$3,819

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Best time to book a flight from Ontario to Jeju City

Have a flexible travel schedule? Discover the best time to fly to Jeju City 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.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Jeju City. 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 Jeju City?

    For as low as $1,457, Korean Air can have you in Jeju City from Ontario in 20h 15m. Airlines will cover a distance of 6185 mi.

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

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

  • How can I find direct flights from Ontario to Jeju City?

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

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

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

See more FAQs

Traveling to a place near Jeju City?

Book flights to Jeju City if you plan to visit one of these locations
Seogwipo

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 Jeju City

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Jeju City flights
San Francisco to Jeju City flights
San Diego to Jeju City flights
San Jose to Jeju City flights

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.