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Cheap flights from Ontario to Jeju City from $603

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Jeju City departing on 11/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Ontario to Jeju City

Cheap round-trip flights

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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, momondo users made 832,500 searches. Data last updated August 4, 2026.
Use the filters below to find and compare flights from Ontario to Jeju City that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest one-way

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Wed 11/18

10:50 pm-7:10 pm

3 stops51h 20m

$603

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Sat 1/9

10:50 pm-5:25 pm

1 stop25h 35m

$620

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Sat 1/9

10:50 pm-6:40 am

3 stops38h 50m

$628
Quickest one-way

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Sat 8/22

12:45 am-9:25 am

1 stop16h 40m

$662

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Sat 8/22

12:45 am-9:25 am

1 stop16h 40m

$668

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Sat 8/22

12:45 am-4:00 pm

2 stops23h 15m

$678

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Sat 1/2

10:50 pm-10:50 am

1 stop19h 00m

$693

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Sat 1/9

10:50 pm-4:05 pm

2 stops48h 15m

$696

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Tue 8/18

12:45 am-9:45 am

1 stop17h 00m

$808

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Wed 11/18

10:50 pm-4:30 pm

2 stops24h 40m

$3,998

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Ontario to Jeju City

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Jeju City according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Jeju City (ONT to CJU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Jeju City

Fastest flight time

32h 28m

Direct flights

None
The fastest flight from Ontario to Jeju City takes 32h 28m
There are no direct flights from Ontario to Jeju City. There are no popular flight routes from Ontario to Jeju City.
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Frequently asked questions about flying from Ontario to Jeju City

  • How far is Ontario to Jeju City by plane?

    Jeju City is 6181.2 mi away from Ontario. In terms of flight time, this usually takes a little over 32h 28m.

  • When did momondo last update prices for flights from Ontario Airport to Jeju City Airport?

    Prices for flights from Ontario Airport to Jeju City Airport were last updated today.

  • How old do you have to be to fly from Ontario Airport to Jeju City Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Jeju City Airport.

  • What documentation or ID do you need to fly to Jeju City Airport?

    The travel and health documents required for your trip to Jeju City Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Jeju City Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Frequently asked questions about flying from Ontario to Jeju City

  • How do I get Price Alerts for flights from Ontario to Jeju City?

    Confirm your travel details to search for the latest offers for flights from Ontario to Jeju City. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Ontario to Jeju City with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Traveling to a place near Jeju City?

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

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Jeju City?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Jeju City. momondo saves you time and could save you money on your trip.

Can I find flights from Ontario to Jeju City with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Jeju City from Ontario with this policy.

How can momondo help me find flights from Ontario to Jeju City?

Once all potential Ontario to Jeju City flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to Jeju City right now. Can momondo alert me if prices change?

Price alerts on flights to Jeju City from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Cabin classes currently available on flights to Jeju City

List of cabin classes available on flights landing in Jeju City. Availability may vary depending on flight origin and airline.
First Class to Jeju City
Business Class to Jeju City