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$367+ Cheap flights from Incheon Intl (ICN) to Ontario (ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ONT
Apr 8 — Apr 151
Tue 4/8
Tue 4/15
1 adult, Economy
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Cheap flight deals from Incheon Intl to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Incheon Intl (ICN) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$503
(United Airlines)

One-way from

$367
(Trip.com)

Popular in

August

Cheapest in

June

Average price

$785
Provider with most accurate pricing for Incheon Intl-Ontario flight deals.
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Provider most trusted by Cheapflights users for Incheon Intl-Ontario flights.
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From Incheon Intl to Ontario
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One-way flight from Incheon Intl to Ontario
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Highest demand for flights based on searches. 21% potential increase in price ($236 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($42 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Incheon Intl to Ontario

Cheapest flights from Incheon Intl to Ontario
Explore the most affordable flight options available from Incheon Intl to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 3, 2025.

This United Airlines deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1911:30 amICN - ONT
1 stop22h 26mUnited Airlines
Wed 4/233:55 pmONT - ICN
1 stop31h 05mUnited Airlines
Deal found 4/2$503
This Kissandfly.com deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/114:50 pmICN - ONT
1 stop22h 05mLufthansa
Thu 4/246:00 amONT - ICN
1 stop17h 00mLufthansa
Deal found 4/2$543
This Gotogate deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/18:15 pmICN - ONT
1 stop37h 35mChina Airlines
Mon 11/1010:45 pmONT - ICN
1 stop27h 30mChina Airlines
Deal found 4/2$840
This Alaska Airlines deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/99:25 pmICN - ONT
1 stop16h 25mAlaska Airlines
Fri 5/169:50 amONT - ICN
1 stop17h 10mAlaska Airlines
Deal found 4/2$841
This Kiwi.com deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/86:20 pmICN - ONT
1 stop21h 39mMultiple Airlines
Tue 5/136:00 amONT - ICN
1 stop19h 55mMultiple Airlines
Deal found 4/2$882
This Hawaiian Airlines deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/59:25 pmICN - ONT
1 stop16h 25mHawaiian Airlines
Tue 9/308:35 amONT - ICN
1 stop18h 25mHawaiian Airlines
Deal found 4/2$896
This American Airlines deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/275:25 pmICN - ONT
2 stops20h 15mAmerican Airlines
Sat 10/1111:59 pmONT - ICN
1 stop23h 31mAmerican Airlines
Deal found 4/1$1,077
This Delta deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/84:40 pmICN - ONT
1 stop16h 04mDelta
Tue 4/225:45 amONT - ICN
1 stop18h 45mDelta
Deal found 4/2$1,208

Cheapflights Fare Finder

Customize your flight search to find flights from Incheon Intl to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 3, 2025.
Use the filters below to find and compare flights from Incheon Intl Airport to Ontario that are best for you.

Fly from

Incheon Intl

Fly to

Ontario

Route

Depart

Return

Price

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Sat 4/19

11:30 am-8:42 pm

2 stops49h 12m

Ontario

Wed 4/23

5:00 am-3:00 pm

2 stops42h 00m

$503

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 5/9

9:25 pm-9:50 pm

1 stop16h 25m

Ontario

Fri 5/16

9:50 am-7:00 pm

1 stop17h 10m

$841

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Sun 5/11

12:35 pm-6:00 pm

1 stop21h 25m

Ontario

Fri 8/1

12:45 am-7:35 pm

1 stop26h 50m

$842

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Thu 5/8

6:20 pm-11:59 pm

1 stop21h 39m

Ontario

Tue 5/13

6:00 am-5:55 pm

1 stop19h 55m

$882

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Mon 5/5

9:25 pm-9:50 pm

1 stop16h 25m

Ontario

Tue 9/30

8:35 am-7:00 pm

1 stop18h 25m

$896

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Sat 9/27

5:25 pm-9:40 pm

2 stops20h 15m

Ontario

Sat 10/11

11:59 pm-3:30 pm

1 stop23h 31m

$1,077

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 5/2

4:40 pm-11:41 pm

2 stops23h 01m

Ontario

Thu 5/8

6:00 am-4:40 pm

1 stop18h 40m

$1,208

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Mon 6/2

6:20 pm-11:39 pm

1 stop21h 19m

$367

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Tue 4/15

4:50 pm-2:50 pm

1 stop14h 00m

$413

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Mon 6/2

8:45 pm-6:20 pm

2 stops37h 35m

$443

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

Showing 1-10 of 17 results
1
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Compare providers for flights from Incheon Intl to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Incheon Intl to Ontario in April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Incheon Intl Airport-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Incheon Intl Airport-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Incheon Intl Airport-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Incheon Intl Airport-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Incheon Intl Airport-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Incheon Intl to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Incheon Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Incheon Intl Airport to Ontario

What is the cheapest month to book a flight from Incheon Intl Airport to Ontario?

Currently, August is the cheapest month in which you can book a flight from Incheon Intl Airport to Ontario (average of $246). Flying from Incheon Intl Airport to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ICN to ONT?

Find hourly flight availability from Incheon Intl to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 3, 2025.

A simple way to save on the total cost of your ticket is to fly from Incheon Intl Airport to Ontario at noon. If you’re flexible enough to do this you can expect to save up to 3% on your trip compared to booking a flight in the morning.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated April 3, 2025.
Read reviews from past customers who have flown China Airlines, Alaska Airlines and Delta from Seoul to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
China Airlines
8.2
Very good
725 reviews

Entertainment

8.0

Crew

8.5

Overall

8.2

Comfort

8.0

Food

7.8

Boarding

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
China Airlines
8.2
Very good
725 reviews
China Airlines
8.2
Very good
725 reviews

Entertainment

8.0

Crew

8.5

Overall

8.2

Comfort

8.0

Food

7.8

Boarding

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Alaska Airlines
8.0
Very good
9,827 reviews
China Airlines
8.2
Very good
725 reviews

Entertainment

8.0

Crew

8.5

Overall

8.2

Comfort

8.0

Food

7.8

Boarding

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Delta
8.0
Very good
7,897 reviews
China Airlines
8.2
Very good
725 reviews

Entertainment

8.0

Crew

8.5

Overall

8.2

Comfort

8.0

Food

7.8

Boarding

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Hawaiian Airlines
7.9
Good
2,347 reviews
China Airlines
8.2
Very good
725 reviews

Entertainment

8.0

Crew

8.5

Overall

8.2

Comfort

8.0

Food

7.8

Boarding

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Qatar Airways
7.4
Good
3,540 reviews
China Airlines
8.2
Very good
725 reviews

Entertainment

8.0

Crew

8.5

Overall

8.2

Comfort

8.0

Food

7.8

Boarding

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver

Related info for your journey

Find useful and relevant information for your journey from Incheon Intl to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from Incheon Intl?

    If you book a flight to Ontario from Incheon Intl, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario. There are 0 flights from Incheon Intl to Ontario per day from 1 airline.

  • What are the cheapest airlines flying from Incheon Intl Airport to Ontario round-trip?

    United Airlines, at $503, was found to be the cheapest airline from Incheon Intl Airport to Ontario.Alternate airlines to your destination round-trip include Alaska Airlines and China Airlines. United Airlines is 41% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Incheon Intl Airport to Ontario one-way?

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $413. WestJet flights start at $443 while deals on China Airlines start at $521 one-way.

  • Can I find deals for flights from Incheon Intl to Ontario that include hotel bookings?

    Yes. In addition to deals on Incheon Intl to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Incheon Intl to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Incheon Intl to Ontario.

  • Can I find deals for business class flights from Incheon Intl to Ontario?

    Yes. Cheapflights offers flight deals from Incheon Intl to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, August is the cheapest month in which you can book a flight from Incheon Intl Airport to Ontario (average of $246). Flying from Incheon Intl Airport to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top airline flying from Incheon Intl to Ontario

Discover the top airline that operate flights from Incheon Intl to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$596Average$782FlexibilityNo cancel feeOn-time69%

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