ICN - ONT

$473 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 8/25. 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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Flights 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

Thu, Dec 18 - Tue, Dec 30
United Airlines Logo
12:45 pm - 9:59 amICN-ONT
14h 14m1 stop
United Airlines Logo
1:00 pm - 5:40 amONT-ICN
23h 40m2 stops
$625United Airlines
Find Deal
Fri, Sep 12 - Sun, Sep 21
United Airlines Logo
4:50 pm - 8:33 pmICN-ONT
19h 43m1 stop
United Airlines Logo
6:38 pm - 3:00 pmONT-ICN
28h 22m2 stops
$626United Airlines
Find Deal
Fri, Oct 10 - Tue, Oct 21
United Airlines Logo
11:30 am - 12:13 pmICN-ONT
16h 43m1 stop
United Airlines Logo
6:36 pm - 3:00 pmONT-ICN
28h 24m1 stop
$627United Airlines
Find Deal
Thu, Dec 18 - Fri, Jan 2
United Airlines Logo
12:45 pm - 9:59 amICN-ONT
14h 14m1 stop
United Airlines Logo
6:30 pm - 4:15 pmONT-ICN
28h 45m2 stops
$661United Airlines
Find Deal
Tue, Sep 30 - Sat, Oct 4
United Airlines Logo
4:50 pm - 8:24 pmICN-ONT
19h 34m2 stops
United Airlines Logo
5:05 am - 4:20 amONT-ICN
31h 15m2 stops
$663United Airlines
Find Deal
Sat, Oct 18 - Sat, Nov 1
Alaska Airlines Logo
8:35 pm - 11:59 pmICN-ONT
19h 24m1 stop
Alaska Airlines Logo
6:00 am - 6:35 pmONT-ICN
20h 35m1 stop
$717Alaska Airlines
Find Deal
Sun, Sep 28 - Sun, Oct 5
Alaska Airlines Logo
8:35 pm - 10:44 amICN-ONT
30h 09m1 stop
Alaska Airlines Logo
6:00 am - 6:35 pmONT-ICN
20h 35m1 stop
$734Alaska Airlines
Find Deal
Sat, Sep 6 - Sun, Sep 14
China Airlines Logo
8:35 pm - 6:40 pmICN-ONT
38h 05m1 stop
China Airlines Logo
12:45 am - 7:35 pmONT-ICN
26h 50m1 stop
$882China Airlines
Find Deal
Fri, Sep 5 - Sun, Sep 21
China Airlines Logo
12:35 pm - 6:40 pmICN-ONT
22h 05m1 stop
China Airlines Logo
12:10 am - 11:15 amONT-ICN
19h 05m1 stop
$883China Airlines
Find Deal
Fri, Dec 5 - Mon, Dec 29
 Logo
6:55 pm - 10:45 pmICN-ONT
20h 50m2 stops
 Logo
6:42 pm - 5:10 pmONT-ICN
29h 28m2 stops
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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$473
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 $473 for a one-way ticket and $625 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?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Incheon and Ontario, with Star Alliance 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 8861 reviews
7.3Comfort
6.6Food
8.1Crew
7.0Entertainment
7.7Boarding
Airline reviews

Boarded plane and then delayed 1.5 hours while on the plane

4.0 OkayJake, Jul 2025BIH - SFO
Read more United Airlines reviews

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

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

My flight was delayed a very short period of time but they did not hold my connecting flight to San Diego, also through United. So they closed the doors before we got off our plane. They would only have to help the door open for another five to ten minutes. So I missed a court deadline for a manditory mediation settlement conference for my client. I had to get an associate to be there in person and be on the phone with him relaying what he needs to do the entire time. The court was very upset with me and so was my client. United cannot be trusted.

We were given vouchers we couldn’t use with a 5.5 hour delay

Really good 😊 the woman at the gate entrance was a little rude checking in our carry-on but i dont think she worked for the airline, she worked for the airport at sacramento, other than that amazing.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

Airbus plane, nice and polite staff, entertainment even as it was a short flight.

United out of SFO is having issues with catering so none of our meals were loaded on the plane and no offer of compensation for our tickets purchased was offered.

Everything you need to know for your flight from Incheon to Ontario

Information on your arrival and departure airports

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