$463 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 9/4. 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
Incheon2 stops$856
Busan
Busan1 stop$943
Seoul
Incheon2 stops$856
Busan
Busan1 stop$943

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

Mon, Sep 8 - Mon, Sep 15
 Logo
9:46 pm - 9:35 pmONT-ICN
31h 49m2 stops
 Logo
6:20 pm - 11:38 pmICN-ONT
21h 18m1 stop
Tue, Sep 9 - Mon, Sep 15
 Logo
8:35 am - 10:30 amONT-ICN
33h 55m2 stops
 Logo
6:20 pm - 11:38 pmICN-ONT
21h 18m1 stop
Sun, Sep 7 - Mon, Sep 15
 Logo
10:28 pm - 8:30 pmONT-ICN
30h 02m2 stops
 Logo
6:20 pm - 11:38 pmICN-ONT
21h 18m1 stop
Sat, Sep 6 - Mon, Sep 15
 Logo
8:59 pm - 8:30 pmONT-ICN
31h 31m2 stops
 Logo
6:20 pm - 11:38 pmICN-ONT
21h 18m1 stop
Sat, Oct 18 - Wed, Oct 29
China Airlines Logo
12:10 am - 7:35 pmONT-ICN
27h 25m1 stop
China Airlines Logo
12:30 pm - 5:50 pmICN-ONT
21h 20m1 stop
$936China Airlines
Find Deal
Mon, Sep 22 - Mon, Nov 3
China Airlines Logo
12:10 am - 7:00 pmONT-PUS
26h 50m1 stop
China Airlines Logo
11:50 am - 4:50 pmPUS-ONT
22h 00m1 stop
$943China Airlines
Find Deal
Fri, Sep 19 - Sun, Oct 5
Hawaiian Airlines Logo
10:09 am - 7:00 pmONT-ICN
16h 51m1 stop
Hawaiian Airlines Logo
8:35 pm - 12:03 amICN-ONT
19h 28m1 stop
$1,011Hawaiian Airlines
Find Deal
Wed, Feb 18 - Thu, Apr 2
Delta Logo
6:45 am - 10:50 amONT-PUS
35h 05m2 stops
Delta Logo
7:00 am - 10:38 pmPUS-ONT
31h 38m2 stops
$1,541Delta
Find Deal
Tue, Sep 16 - Tue, Sep 23
Korean Air Logo
6:00 am - 7:45 amONT-PUS
33h 45m2 stops
Korean Air Logo
4:30 pm - 5:00 pmPUS-ONT
40h 30m2 stops
$1,546Korean Air
Find Deal
Tue, Oct 14 - Mon, Nov 10
Delta Logo
7:35 am - 8:45 pmONT-PUS
21h 10m2 stops
Delta Logo
7:55 am - 10:55 pmPUS-ONT
32h 00m2 stops
$1,891Delta
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$463
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly and prices are also 4% 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 1133 reviews
8.7Crew
8.2Entertainment
8.1Food
8.2Comfort
8.5Boarding
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

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. :)

Most relaxing long distance flight I have been on. And I have flown on many.

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

I don’t think I’ll be flying them again. Tight seats, no flowing air or air nozzles that you can turn air on you, for those who could have motion sickness this would be your worst nightmare. The pilot was great and experienced (which is what you want when flying 12 hours) overall I’m thankful knowledgeable pilots!

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.

Not a great experience. We paid for the upgrade for premium economy seats and seated ourselves in very comfortable seats. Someone came along with the same seat on their boarding pass. The aircraft had been changed and as a result we were booted out and sent further back to small uncomfortable seats. After complaining we were moved to emergency row seats, which gave us more leg room but the seats don’t recline. For people in our 70’s we found having to sit upright from California to NJ very uncomfortable. Not sure why they chose to move senior citizens instead of the two people that were allowed to take the more comfortable seats. Not happy.

Everything was great. Only thing that could’ve made it better was buy on board options for hot food, but the snacks were decent. The flight attendants were great. I had no complaints. I was able to make it to my destination safely

Boarded plane and then delayed 1.5 hours while on the plane

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

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