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$435+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ONT
Mar 8 — Mar 151
Sat 3/8
Sat 3/15
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 March 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$711
(United Airlines)

One-way from

$435
(oojo)

Popular in

August

Cheapest in

March

Average price

$694
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 ($228 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($46 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 3, 2025.

This United Airlines deal was found by Cheapflights users on 3/2. 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.
Thu 3/612:45 pmICN - ONT
1 stop14h 09mUnited Airlines
Tue 6/36:41 pmONT - ICN
1 stop17h 39mUnited Airlines
Deal found 3/2$711
This American Airlines deal was found by Cheapflights users on 3/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/105:50 pmICN - ONT
2 stops20h 10mAmerican Airlines
Wed 3/1211:59 pmONT - ICN
1 stop23h 56mAmerican Airlines
Deal found 3/2$864
This Gotogate deal was found by Cheapflights users on 3/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/212:35 pmICN - ONT
1 stop21h 25mChina Airlines
Tue 5/612:10 amONT - ICN
1 stop19h 05mChina Airlines
Deal found 3/1$879
This Gotogate deal was found by Cheapflights users on 3/2. 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.
Mon 3/109:25 pmICN - ONT
1 stop15h 30mHawaiian Airlines
Tue 3/258:50 amONT - ICN
1 stop18h 35mHawaiian Airlines
Deal found 3/2$892
This Trip.com deal was found by Cheapflights users on 3/2. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1612:35 pmICN - ONT
1 stop21h 25mMultiple Airlines
Sun 5/48:24 amONT - ICN
1 stop19h 26mMultiple Airlines
Deal found 3/2$1,017
This Delta deal was found by Cheapflights users on 3/3. 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.
Thu 4/177:20 pmICN - ONT
1 stop34h 35mDelta
Thu 4/245:45 amONT - ICN
1 stop18h 45mDelta
Deal found 3/3$1,137
This Onlinetour deal was found by Cheapflights users on 3/2. 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 Onlinetour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/114:40 pmICN - ONT
1 stop16h 04mKorean Air
Fri 5/96:00 amONT - ICN
1 stop18h 40mKorean Air
Deal found 3/2$1,212
This WestJet deal was found by Cheapflights users on 3/2. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/156:45 pmICN - ONT
2 stops59h 10mWestJet
Fri 5/2311:46 amONT - ICN
2 stops38h 59mWestJet
Deal found 3/2$1,327

Find flights from Incheon Intl to Ontario within your budget

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 March 3, 2025.

Fly from

Incheon Intl

Fly to

Ontario

Route

Depart

Return

Price

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Thu 3/13

5:00 pm-12:44 pm

2 stops35h 44m

Ontario

Thu 3/20

6:00 am-3:15 pm

1 stop17h 15m

$711

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 5/2

12:35 pm-6:00 pm

1 stop21h 25m

Ontario

Tue 5/6

12:10 am-11:15 am

1 stop19h 05m

$879

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Sun 6/1

9:25 pm-9:55 pm

1 stop16h 30m

Ontario

Fri 6/6

9:50 am-7:00 pm

1 stop17h 10m

$920

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Thu 4/17

5:25 pm-11:50 pm

1 stop22h 25m

Ontario

Thu 4/24

4:35 pm-3:30 pm

2 stops30h 55m

$980

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Wed 4/16

12:35 pm-6:00 pm

1 stop21h 25m

Ontario

Sun 5/4

8:24 am-7:50 pm

1 stop19h 26m

$1,017

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Thu 4/17

7:20 pm-12:16 pm

2 stops32h 56m

Ontario

Thu 4/24

1:20 pm-4:30 pm

2 stops35h 10m

$1,137

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 4/11

4:40 pm-4:44 pm

1 stop16h 04m

Ontario

Fri 5/9

6:00 am-4:40 pm

1 stop18h 40m

$1,212

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Tue 4/15

6:45 pm-1:55 pm

2 stops59h 10m

Ontario

Fri 5/23

11:46 am-6:45 pm

2 stops38h 59m

$1,327

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Sun 3/16

4:55 pm-8:10 pm

2 stops43h 15m

Ontario

Mon 5/26

5:10 am-4:05 pm

2 stops42h 55m

$1,575

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Mon 5/12

1:35 am-9:22 pm

2 stops59h 47m

Ontario

Tue 5/27

10:40 pm-10:05 pm

2 stops55h 25m

$1,681

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/3

Showing 1-10 of 21 results
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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 March.
ProviderPrice AccuracyTrust Score*
oojoPrice Accuracy3 starsTrust Score*2 stars
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.

Travel insights for flights from Incheon Intl to Ontario

Get recent, data-driven insights about flights from Incheon Intl to Ontario including ideal travel times, pricing trends, and more.

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 $313). 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 March 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 March 3, 2025.
Read reviews from past customers who have flown Korean Air, China Airlines and Delta from Seoul to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,035 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Entertainment

8.2

Crew

8.7

Reviews

1 / 20

6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.

Korean Air
8.4
Very good
1,035 reviews
Korean Air
8.4
Very good
1,035 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Entertainment

8.2

Crew

8.7

Reviews

1 / 20

6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.

China Airlines
8.2
Very good
721 reviews
Korean Air
8.4
Very good
1,035 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Entertainment

8.2

Crew

8.7

Reviews

1 / 20

6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.

Delta
8.0
Very good
8,068 reviews
Korean Air
8.4
Very good
1,035 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Entertainment

8.2

Crew

8.7

Reviews

1 / 20

6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.

Hawaiian Airlines
7.9
Good
2,319 reviews
Korean Air
8.4
Very good
1,035 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Entertainment

8.2

Crew

8.7

Reviews

1 / 20

6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.

Qatar Airways
7.4
Good
3,568 reviews
Korean Air
8.4
Very good
1,035 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Entertainment

8.2

Crew

8.7

Reviews

1 / 20

6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.

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 $711, was found to be the cheapest airline from Incheon Intl Airport to Ontario.Alternate airlines to your destination round-trip include China Airlines and Hawaiian Airlines. United Airlines is 17% 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 $435. China Airlines flights start at $544 while deals on Hawaiian Airlines start at $598 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 $313). 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 March 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$674Average$784FlexibilityNo cancel feeOn-time69%
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