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Jeju-do

$755+ Cheap flights from Ontario (ONT) to Jeju-do

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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CJU
Jun 23 — Jun 301
Mon 6/23
Mon 6/30
1 adult, Economy
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Cheap flight deals from Ontario to Jeju-do

Keep the following information in mind while searching for Ontario to Jeju-do flight deals. Data was last updated June 18, 2025.

Round-trip from

$1,305
(Trip.com)

One-way from

$755
(Mytrip)

Popular in

December

Cheapest in

August

Average price

$1,321
From Ontario to Jeju-do
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One-way flight from Ontario to Jeju-do
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Highest demand for flights based on searches. 30% potential increase in price ($570 potential increase over avg. RT price).
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Cheapest flight prices on average. 9% potential price decrease ($115 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Ontario to Jeju-do

Cheapest flights from Ontario to Jeju-do
Explore the most affordable flight options available from Ontario to Jeju-do. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 18, 2025.

This Trip.com deal was found by Cheapflights users on 6/17. 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.
Thu 9/2512:10 amONT - CJU
2 stops28h 25mMultiple Airlines
Thu 10/211:00 amCJU - ONT
2 stops47h 00mMultiple Airlines
Deal found 6/17$1,305

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Jeju-do 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 June 18, 2025.
Use the filters below to find and compare flights from Ontario to Jeju-do that are best for you.

Fly from

Ontario

Fly to

Jeju-do

Route

Depart

Return

Price

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Thu 9/25

12:10 am-8:35 pm

2 stops28h 25m

Jeju City

Thu 10/2

11:00 am-6:00 pm

2 stops47h 00m

$1,305

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Wed 10/8

12:10 am-10:30 pm

2 stops30h 20m

$755

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Tue 11/25

6:43 am-8:00 pm

2 stops20h 17m

$973

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/18

Best time to book a flight from Ontario to Jeju-do

Have a flexible travel schedule? Discover the best time to fly to Jeju-do 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 Jeju-do
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Jeju-do

Get insights into the airlines that provide service to Jeju-do. 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-do. Reviews last updated June 18, 2025.
Korean Air
8.4
Very good
1,090 reviews

Food

8.1

Crew

8.7

Comfort

8.3

Boarding

8.5

Overall

8.4

Entertainment

8.2

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
1,090 reviews
Korean Air
8.4
Very good
1,090 reviews

Food

8.1

Crew

8.7

Comfort

8.3

Boarding

8.5

Overall

8.4

Entertainment

8.2

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-do. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Jeju-do?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Jeju-do.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Jeju-do 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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