ICN - ONT

$332 Find Cheap Flights from Incheon to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Incheon to Ontario departing on 11/20. 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 in flight searches from Incheon to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Incheon to Ontario, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Incheon to Ontario (ICN-ONT)

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

Tue, Sep 16 - Mon, Sep 22
United Airlines Logo
11:30 am - 12:13 pmICN-ONT
16h 43m1 stop
United Airlines Logo
6:50 pm - 4:20 amONT-ICN
17h 30m1 stop
$482United Airlines
Find Deal
Thu, Sep 11 - Thu, Sep 18
United Airlines Logo
11:30 am - 12:13 pmICN-ONT
16h 43m1 stop
United Airlines Logo
1:42 pm - 4:20 amONT-ICN
22h 38m1 stop
$486United Airlines
Find Deal
Mon, Sep 15 - Fri, Sep 19
Hawaiian Airlines Logo
8:35 pm - 2:12 pmICN-ONT
33h 37m1 stop
Hawaiian Airlines Logo
10:09 am - 7:00 pmONT-ICN
16h 51m1 stop
$588Hawaiian Airlines
Find Deal
Thu, Jan 29 - Sat, Feb 7
Alaska Airlines Logo
8:35 pm - 10:37 pmICN-ONT
19h 02m1 stop
Alaska Airlines Logo
6:00 am - 6:35 pmONT-ICN
19h 35m1 stop
$590Alaska Airlines
Find Deal
Fri, Oct 10 - Fri, Oct 17
Alaska Airlines Logo
8:35 pm - 12:03 amICN-ONT
19h 28m1 stop
Alaska Airlines Logo
7:47 pm - 6:35 pmONT-ICN
30h 48m1 stop
$598Alaska Airlines
Find Deal
Tue, Sep 23 - Wed, Oct 1
Delta Logo
7:40 pm - 11:42 pmICN-ONT
20h 02m1 stop
Delta Logo
1:15 pm - 3:20 pmONT-ICN
34h 05m1 stop
$599Delta
Find Deal
Thu, Dec 25 - Sat, Apr 4
Delta Logo
8:05 pm - 8:17 pmICN-ONT
17h 12m1 stop
Delta Logo
5:05 pm - 4:30 pmONT-ICN
31h 25m2 stops
$603Delta
Find Deal
Thu, Dec 18 - Thu, Jan 8
Hawaiian Airlines Logo
8:35 pm - 12:14 amICN-ONT
20h 39m1 stop
Hawaiian Airlines Logo
6:00 am - 6:35 pmONT-ICN
19h 35m1 stop
$654Hawaiian Airlines
Find Deal
Thu, Sep 25 - Mon, Mar 23
Korean Air Logo
4:40 pm - 5:00 pmICN-ONT
16h 20m1 stop
Korean Air Logo
6:00 am - 4:15 pmONT-ICN
18h 15m1 stop
$656Korean Air
Find Deal
Mon, Sep 29 - Thu, Dec 11
Korean Air Logo
4:40 pm - 5:00 pmICN-ONT
16h 20m1 stop
Korean Air Logo
6:45 am - 3:55 pmONT-ICN
16h 10m1 stop
$676Korean Air
Find Deal
Booking Insights

KAYAK's insights & trends for Incheon to Ontario flights

Get data-powered insights and trends into flights from Incheon to Ontario 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 Incheon to Ontario?

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

For Incheon to Ontario, Friday is the cheapest day to fly on average and Wednesday is the most expensive. Flying from Ontario back to Incheon, the best deals are generally found on Friday, with Saturday being the most expensive.

Good to know

Cheapest flight$332
Flight from Incheon to Ontario

When to book flights from Incheon to Ontario

Are your dates flexible? Find out the best times to travel from Incheon to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Incheon to Ontario flights

  • What is the cheapest flight from Incheon Intl Airport to Ontario?

    In the last 3 days, the lowest price for a flight from Incheon Intl Airport to Ontario was $332 for a one-way ticket and $482 for a round-trip.

  • Do I need a passport to fly between Incheon and Ontario?

    Yes, you’ll need a passport to travel to Ontario from Incheon.

  • Which airports will I be using when flying from Incheon to Ontario?

    On your way to Ontario, you’ll fly out from Incheon Intl. You’ll be landing at Ontario.

  • Which aircraft models fly most regularly from Incheon to Ontario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Incheon to Ontario?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Incheon and Ontario, with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Incheon 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 from Incheon to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Incheon 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 Incheon 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 to Incheon with another airline. Booking your flights between Incheon and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Incheon 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 from Incheon up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Incheon to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Incheon to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Incheon 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 8943 reviews
7.7Boarding
7.3Comfort
8.1Crew
7.1Entertainment
6.6Food
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 from Incheon to Ontario

Information on your arrival and departure airports

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