$428 Find Cheap Flights from Ontario to South Korea

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to South Korea departing on 11/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

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Cheap Flights from Ontario to South Korea

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Seoul
Incheon1 stop$873
Jeju City
Jeju City1 stop$1,115
Busan
Busan1 stop$950
Seoul
Incheon1 stop$873
Jeju City
Jeju City1 stop$1,115
Busan
Busan1 stop$950

Book Cheap Ontario to South Korea Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to South Korea that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to South Korea

Thu, Nov 6 - Thu, Nov 13
Multiple Airlines Logo
10:42 pm - 8:30 pmONT-ICN
28h 48m1 stop
Multiple Airlines Logo
9:20 pm - 7:17 amICN-ONT
26h 57m2 stops
$873Multiple Airlines
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Sun, Nov 9 - Mon, Nov 17
Multiple Airlines Logo
10:50 pm - 7:25 pmONT-ICN
51h 35m2 stops
Multiple Airlines Logo
6:55 pm - 11:50 pmICN-ONT
21h 55m1 stop
$887Multiple Airlines
Find Deal
Fri, Nov 28 - Mon, Dec 15
China Airlines Logo
10:50 pm - 11:20 amONT-ICN
19h 30m1 stop
China Airlines Logo
12:30 pm - 4:50 pmICN-ONT
21h 20m1 stop
$930China Airlines
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Fri, Nov 28 - Wed, Jan 21
China Airlines Logo
10:50 pm - 11:20 amONT-ICN
19h 30m1 stop
China Airlines Logo
12:30 pm - 4:50 pmICN-ONT
21h 20m1 stop
$931China Airlines
Find Deal
Wed, Nov 19 - Mon, Nov 24
Delta Logo
6:45 am - 7:45 pmONT-TAE
20h 00m2 stops
Delta Logo
7:40 am - 5:09 pmTAE-ONT
26h 29m2 stops
$1,355Delta
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Tue, Nov 11 - Wed, Nov 19
Korean Air Logo
6:45 am - 10:50 amONT-PUS
35h 05m2 stops
Korean Air Logo
10:25 am - 10:55 pmPUS-ONT
29h 30m2 stops
$1,363Korean Air
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Wed, Nov 19 - Sun, Nov 23
Delta Logo
6:45 am - 7:45 pmONT-TAE
20h 00m2 stops
Delta Logo
7:40 am - 5:09 pmTAE-ONT
26h 29m2 stops
$1,405Delta
Find Deal
Thu, Nov 20 - Sat, Nov 22
Korean Air Logo
6:45 am - 7:45 pmONT-TAE
20h 00m2 stops
Korean Air Logo
7:40 am - 5:09 pmTAE-ONT
26h 29m2 stops
$1,410Korean Air
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Tue, Oct 21 - Sun, Oct 26
Japan Airlines Logo
6:00 am - 9:50 pmONT-GMP
23h 50m2 stops
Japan Airlines Logo
7:40 pm - 3:17 pmGMP-ONT
35h 37m2 stops
$1,455Japan Airlines
Find Deal
Thu, Nov 6 - Thu, Nov 13
Japan Airlines Logo
6:00 am - 10:05 pmONT-GMP
23h 05m2 stops
Japan Airlines Logo
8:00 am - 3:17 pmGMP-ONT
24h 17m2 stops
$1,918Japan Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Ontario to South Korea flights

Get data-powered insights and trends into flights from Ontario to South Korea to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Ontario to South Korea?

The average price of all round-trip flights from Ontario to South Korea clicked on KAYAK for each day over the last 12 months.

When flying from Ontario to South Korea, you should consider leaving on a Friday and avoid Saturdays if you are looking for the best rates. For your return to Ontario, you’ll find the best rates on Fridays and the most expensive ones on Wednesdays.

Good to know

Low seasonSeptember
Cheapest flight$428
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly and prices are also 20% lower on average.
Flight from Ontario to Seoul Incheon Airport

FAQs - booking South Korea flights

  • How does KAYAK find such low prices on flights from Ontario to South Korea?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to South Korea.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to South Korea?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ontario to South Korea is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to South Korea?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Ontario to South Korea with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to South Korea?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Ontario to South Korea up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to South Korea?

    The cheapest time of day to fly to South Korea is generally at night, when round-trip flights cost $1,130 on average. The most expensive time of day to fly to South Korea is generally in the morning, which is peak travel time and where the average cost of a ticket is $1,480.

Reviews of the top 3 airlines serving from Ontario to South Korea

 
Need help choosing which airline to fly with from Ontario to South Korea? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.4
Korean AirOverall score based on 1148 reviews
8.7Crew
8.1Food
8.5Boarding
8.2Entertainment
8.3Comfort
Airline reviews

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

8.0 ExcellentMatt, Aug 2025ATL - ICN
Read more Korean Air reviews

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

Friendly flight attendants and gate agents. Very clean plane and food was good!

I normally love Korean Air, but this trip was not great. We boarded the plan and were settling into our seats. My son and I use these leg swings and we used it on the trip over to Cambodia, but on the way back the flight attendant very rudely told us we could not use it and that it was against regulations. I asked to see the regulation, but never saw it. The food on this trip was horrible as well, Even my son's kids meal was disgusting so we didn't eat anything on the flight. Thankfully we brought snacks. Entertainment - what happened to the games?

This was an amazing flight. The crew was great. The service was great. The food provided was great.

I was unable to select decent seats, and so I was stuck in the middle seat because it was selected for me

Korean air has a little bit more seating space than Asiana air.

There was a lot of partial tv shows but not enough to last the flight. The food was incredible! The crew were so helpful and patient. Lots more space than what I usually get on an international flight. Very comfortable!

Stingy on the drinks - 15 hour direct flight and could barely get attention for some water

Unfortunately, there has been a boarding and departure delay. However, as usual, the flight arrived earlier than the scheduled. There has been a turbulence in-between, it’s unavoidable. I couldn’t complain them.

Not many people, so you can lay down on two seats

The flat bed full lying position is not comfortable at all, this could be improved, it is at an awkward position which i dont have the same issues with other airlines business class.

The flight was uneventful and the crew was kind and professional. Really appreciate the option to order a vegan meal for the flight!

I love my Delta crew, they were so welcoming and helpful.

I absolutely loved my flight from Taipei to LAX. I was originally assigned to a different seat, however one of the stewardess noticed I was uncomfortable in my seat. She offered to move me to a more comfortable setting. Although she didn’t have to do what she did, I am more than grateful and thankful for her doing so. My longer flight felt much more comfortable, just by her taking notice. I really appreciate her.

Better organization of boarding procedures. Terrible leadership guiding people to gates.

They need to improve on how the plane lands cause it was not smooth at all.

I did not like how the plane landed. It was not smooth.

Been flying with China Airline over years many times. Good experience with them, no issues.

China Airlines crews are very excellent doing their job. Very friendly and hardworking. I will always choose China Airlines over and over. Thank you all for making my flight comfortable. God bless to all the staff. :)

Not great, will likely try to fly another or maybe I should have upgraded my ticket? Needed Air…

We were in business class. the angled seats in that class do not have a real window view & the placement of the controls are bad. But we knew that. But the food options were mediocre. The taste was fine, but the size was for a child. It’s just really feels like United is skimping on everything. Even when we were in the Polaris lounge they did not have diet sodas. They said they were out no Coke zero no Diet Coke, etc. I do not think the portion of nuts they serve on the plane could get any smaller. Really a minimal service and offer for what you’re paying for in business.

I was in first class. The outlets at my seat did not work. The plane was shabby and run down. I had prepurchsed a day subscription for internet that was not redeemable. I had to repurchase the internet for my flight and then it didn’t work anyway. Quite disappointed in what was supposed to be the launch of a great vacation.

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

From the first moment you interact with United Airlines, you can expect nothing less but extreme frustration. The baggage handler at the bag drop seems completely unbothered by the presence of customers waiting in line. No help was extended to load the baggage whatsoever. And if any of your bags is overweight by 0.01 pound they will make you re-distribute everything in your suitcase just to play power trip. When it was time to board no help was extended to customers to locate their seats. Moreover. It was a chaotic mess at the gate when it was unclear who should board first and everyone just bunched up, trying to get on the plane. I am sure the crew was doing their best to perform their jobs while being paid their wages however it shouldn’t be that hard to smile once or twice when you’re in the business if serving customers. It is a shame for the United States of America to have a flagship carrier of such low caliber. Our flight was also delayed by about an hour and a half due to further delays prior to our inbound flight. Being someone who has travelled for both business and leisure in Asia, Europe, and South America I have never experienced such poor quality of service.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

The pilots were late and it made us 1 hour late. The meat was tough and bok choy was also tough.

Stuck on tarmac for two hours plus a 5.5 hour flight. Rude flight attendant. And no meals, not even for purchase!

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

The best airline I have ever travel , really good customer service, attention and service !!

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

Everything you need to know for your flight from Ontario to South Korea

Information on your arrival and departure airports

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