$331 Find Cheap Flights from South Korea to Ontario

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight to Ontario departing on 10/16. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Ontario, as well as popular online travel agencies
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Flight Deals

Cheap Flights from South Korea to Ontario

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from South Korea to Ontario 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 South Korea to Ontario

Thu, Oct 16 - Thu, Oct 23
Hawaiian Airlines Logo
8:35 pm - 12:03 amICN-ONT
19h 28m1 stop
Hawaiian Airlines Logo
7:43 pm - 6:35 pmONT-ICN
30h 52m1 stop
$331Hawaiian Airlines
Find Deal
Fri, Oct 24 - Tue, Oct 28
Hawaiian Airlines Logo
8:35 pm - 12:37 pmICN-ONT
32h 02m1 stop
Hawaiian Airlines Logo
4:11 pm - 6:35 pmONT-ICN
34h 24m1 stop
$337Hawaiian Airlines
Find Deal
Thu, Oct 23 - Sun, Oct 26
Hawaiian Airlines Logo
8:35 pm - 12:03 amICN-ONT
19h 28m1 stop
Hawaiian Airlines Logo
9:45 am - 7:25 pmONT-ICN
17h 40m1 stop
$339Hawaiian Airlines
Find Deal
Sat, Oct 25 - Sun, Oct 26
Alaska Airlines Logo
8:35 pm - 12:03 amICN-ONT
19h 28m1 stop
Alaska Airlines Logo
9:45 am - 7:25 pmONT-ICN
17h 40m1 stop
$341Alaska Airlines
Find Deal
Thu, Oct 23 - Wed, Oct 29
Alaska Airlines Logo
8:35 pm - 12:03 amICN-ONT
19h 28m1 stop
Alaska Airlines Logo
6:00 am - 6:35 pmONT-ICN
20h 35m1 stop
$347Alaska Airlines
Find Deal
Sat, Jan 31 - Sat, Feb 7
United Airlines Logo
12:45 pm - 12:14 pmICN-ONT
16h 29m1 stop
United Airlines Logo
6:39 pm - 5:40 amONT-ICN
18h 01m1 stop
$514United Airlines
Find Deal
Thu, Feb 5 - Thu, Feb 12
United Airlines Logo
12:45 pm - 5:43 pmICN-ONT
21h 58m1 stop
United Airlines Logo
6:37 pm - 5:40 amONT-ICN
18h 03m1 stop
$517United Airlines
Find Deal
Tue, Oct 21 - Tue, Jan 13
Delta Logo
7:40 pm - 11:39 pmICN-ONT
19h 59m1 stop
Delta Logo
6:45 am - 4:30 pmONT-ICN
16h 45m1 stop
$599Delta
Find Deal
Thu, Mar 12 - Sat, Mar 14
Delta Logo
8:05 pm - 10:48 amICN-ONT
30h 43m1 stop
Delta Logo
1:00 pm - 4:30 pmONT-ICN
35h 30m2 stops
$602Delta
Find Deal
Wed, Oct 15 - Wed, Oct 22
Korean Air Logo
7:40 pm - 11:39 pmICN-ONT
19h 59m1 stop
Korean Air Logo
6:00 am - 3:20 pmONT-ICN
17h 20m1 stop
$646Korean Air
Find Deal

Everything you should know

Cheapest round-trip
$331
Hawaiian Airlines
Thu 10/16Thu 10/23
ICN - ONT • 1 stop
Cheapest one-way
$358
Multiple Airlines
Fri 10/31
ICN - ONT • 1 stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
Booking Insights

KAYAK's insights & trends for flights to Ontario

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

How long is the flight to Ontario?

The duration of your flight to Ontario depends on your departure and arrival airports. Obviously, any flights that include a layover will also be longer. The most popular routes to Ontario on KAYAK are from Incheon, which takes 11h 00m, Cheongju, which takes 14h 40m, Seoul, which takes 14h 50m, and Daegu, which takes 23h 00m.

How many direct flights to Ontario are there each day?

There are around 120 direct flights from within South Korea to Ontario every day. Most flights depart in the morning, with 8:00 am the most common departure time and 49% of flights departing in the morning.

Good to know

Cheapest flight$331
Flight from Incheon to Ontario

FAQs - booking Ontario flights

  • How far is Ontario Airport from central Ontario?

    Central Ontario is 3 miles away from Ontario Airport.

  • What is the name of Ontario’s airport?

    There is only 1 airport in Ontario, called Ontario Airport (ONT). It can also be referred to as Ontario or Ontario Intl.

  • What is the cheapest day to fly to Ontario?

    Based on KAYAK data, the cheapest day to fly to Ontario is Thursday where round-trip tickets can be as cheap as $69. On the other hand, the most expensive day to fly is Saturday, where round-trip prices are $657 on average.

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

    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 to Ontario.

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

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

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

    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 to Ontario 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 to Ontario?

    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 to Ontario 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 Ontario?

    The cheapest time of day to fly to Ontario is generally in the morning, when round-trip flights cost $938 on average. The most expensive time of day to fly to Ontario is generally in the morning, which is peak travel time and where the average cost of a ticket is $938.

  • How many direct flights to Ontario are there each week?

    Each week there are around 837 direct flights from within South Korea to Ontario. The most common day for departures is Monday, with 16% of flights taking off on this day.

Top tips for finding cheap flights to Ontario

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Ontario flight deals.

Reviews of the top airline flying from South Korea to Ontario

 
See real verified KAYAK customer reviews for airlines flying to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from South Korea to Ontario. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Ontario? 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.
7.4
United AirlinesOverall score based on 8929 reviews
7.3Comfort
6.6Food
8.1Crew
7.1Entertainment
7.7Boarding
Airline reviews

The flight was comfortable with the exit row and great service

10.0 ExcellentMark, Aug 2025HNL - LAX
Read more United Airlines reviews

The flight was comfortable with the exit row and great service

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

1. when we went to check in, our 2 first class seats had been CANCELED and the flight was sold out. This was done without our prior knowledge. It was all we could do to restore one first class seat for my wife and I flew economy. 2, Our flight home was scheduled to leave at 10:30 pm. Due to tsunami warnings, the roads were closed and our flight status was uncertain as to whether it would leave as scheduled. It was announced that it would now leave at 11:20 pm and the roads were now open since the tsunami had come and gone. We made a mad dash to the airport and checked in. Delays were announced at 12:30 pm, 1:30 am, 2:30 am and at 3:30 am it was canceled. Since this was a flight due to natural (tsunami) causes, there was no compensation. We were told to return at 1:00 pm the next day and our baggage would be kept on the plane since the same plane was going to leave at 1:00 pm. We had to return to our hotel for the rest of the night. The same plane did not leave at 1:00 pm and our baggage was gone! All in all, it was a miserable performance by UA. Information was hard to obtain and no one knew what was going on and what was going to happen. Hundreds of passengers slept on the floor, chairs, etc. No food and no water was made available to the passengers. It was a situation where UA could care less what was going on. As a one million mile flyer, I had not experienced anything like this before and it was hugely disappointing!

I found the staff to not be very attentive at all. When paying for Business Class you expect a certain type of service and that was not found. They were almost rude even

Ok. Get a different kosher caterer. The food was odd.

Our experience on United Airlines was extremely poor. The plane was extremely cold throughout our entire flight- which multiple people complained about- and we had to wait 2 hours to get a blanket which was too thin and barely helped warm us up. As well as this, none of the entertainment features were working so we had to sit through a roughly 10 hour flight with nothing to keep our attention, including the actual flight path screen. It was an extremely disappointing experience and I would hope that this gets fixed if we ever choose United Airlines again.

I really enjoyed flying with United airlines amazing experience , good customer service and great food

1.It will be better if sandwich is warm. 2.The food is too salty. 3.Breakfast needs some vegetables or fruits.

Boarded plane and then delayed 1.5 hours while on the plane

It was all good flight was on time, service was good I enjoyed a few movies and everything was smooth

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

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