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Jeju City

$923+ Cheap flights from Ontario (ONT) to Jeju City (CJU)

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 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CJU
Apr 9 — Apr 161
Wed 4/9
Wed 4/16
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 April 4, 2025.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Popular in

December

Cheapest in

August

Average price

$1,046
Provider with most accurate pricing for Ontario-Jeju City flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Jeju City flights.
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($453 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($104 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Ontario to Jeju City

One-way flights from Ontario to Jeju City
Search for one-way flight options from Ontario to Jeju City. Find affordable one-way fares based on user searches. Data last updated April 4, 2025.

This Trip.com deal was found by Cheapflights users on 4/3. 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.
Tue 5/1312:10 amONT - CJU
1 stop37h 55mMultiple Airlines
Deal found 4/3$923
This Justfly.com deal was found by Cheapflights users on 4/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/146:00 amONT - CJU
2 stops22h 25mKorean Air
Deal found 4/3$2,161

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 April 4, 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 5/13

12:10 am-6:05 am

1 stop37h 55m

$923

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Wed 5/14

6:00 am-8:25 pm

2 stops22h 25m

$2,161

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/3

  • Most accurate provider: When it comes to deals on Ontario-Jeju City flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Ontario-Jeju City flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Ontario-Jeju City flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Jeju City flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Jeju City flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

Reviews of airlines servicing Jeju City

Get insights into the airlines that provide service to Jeju City. 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 Jeju City. Reviews last updated April 4, 2025.
Korean Air
8.4
Very good
1,053 reviews

Entertainment

8.2

Overall

8.4

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,053 reviews
Korean Air
8.4
Very good
1,053 reviews

Entertainment

8.2

Overall

8.4

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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.

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