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Jeju City

$2,139+ 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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CJU
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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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 August 14, 2025.

Round-trip from

$2,139
(Mytrip)

Popular in

December

Cheapest in

October

Average price

$1,679
From Ontario to Jeju City
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Highest demand for flights based on searches. 26% potential increase in price ($501 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($109 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 August 14, 2025.

This Mytrip deal was found by Cheapflights users on 8/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/3012:10 amONT - CJU
1 stop17h 35mMultiple Airlines
Wed 10/810:30 amCJU - ONT
1 stop22h 35mMultiple Airlines
Deal found 8/13$2,139

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 August 14, 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

Tue 9/30

12:10 am-9:45 am

1 stop17h 35m

Jeju City

Wed 10/8

10:30 am-5:05 pm

1 stop22h 35m

$2,139

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

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.

  • 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.

Traveling to a place near Jeju City?

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Seogwipo

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