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Ontario

$336+ Cheap flights from Seoul (SEL) 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 5/25. Fares are subject to change and may not be available on all flights or dates of travel.
SEL — ONT
mar. 31 — abr. 71
lun. 3/31
lun. 4/7
1 adult, Economy
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Cheap flight deals from Seoul to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Seoul (SEL) 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 marzo 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$548
(United Airlines)

One-way from

$336
(Trip.com)

Popular in

August

Cheapest in

February

Average price

$729
Provider with most accurate pricing for Seoul (SEL)-Ontario flight deals.
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Provider most trusted by Cheapflights users for Seoul (SEL)-Ontario flights.
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From Seoul (SEL) to Ontario
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One-way flight from Seoul (SEL) to Ontario
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Highest demand for flights based on searches. 18% potential increase in price ($199 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($33 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 Seoul to Ontario

Cheapest flights from Seoul to Ontario
Explore the most affordable flight options available from Seoul to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on marzo 26, 2025.

This United Airlines deal was found by Cheapflights users on 3/24. 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.
jue. 4/311:30 amICN - ONT
1 stop15h 35mUnited Airlines
jue. 4/176:39 pmONT - ICN
1 stop17h 41mUnited Airlines
Deal found 3/24$547
This Trip.com deal was found by Cheapflights users on 3/24. 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.
lun. 5/199:25 pmICN - ONT
1 stop16h 30mAlaska Airlines
jue. 6/59:50 amONT - ICN
1 stop17h 10mAlaska Airlines
Deal found 3/24$833
This Gotogate deal was found by Cheapflights users on 3/24. 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.
jue. 4/178:35 pmICN - ONT
1 stop37h 25mChina Airlines
dom. 4/2012:10 amONT - ICN
1 stop27h 25mChina Airlines
Deal found 3/24$845
This American Airlines deal was found by Cheapflights users on 3/24. 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.
jue. 4/35:25 pmICN - ONT
2 stops20h 35mAmerican Airlines
jue. 4/1711:59 pmONT - ICN
1 stop23h 31mAmerican Airlines
Deal found 3/24$860
This Expedia deal was found by Cheapflights users on 3/24. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/206:20 pmICN - ONT
1 stop20h 26mMultiple Airlines
mar. 6/37:30 amONT - ICN
2 stops18h 25mMultiple Airlines
Deal found 3/24$928
This hutchgo.com deal was found by Cheapflights users on 3/25. 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 hutchgo.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/99:25 pmICN - ONT
1 stop16h 25mHawaiian Airlines
jue. 5/299:50 amONT - ICN
1 stop17h 10mHawaiian Airlines
Deal found 3/25$1,041

Cheapflights Fare Finder

Customize your flight search to find flights from Seoul 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 marzo 26, 2025.
Use the filters below to find and compare flights from Seoul to Ontario that are best for you.

Fly from

Seoul

Fly to

Ontario

Route

Depart

Return

Price

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

jue. 4/10

4:50 pm-5:51 pm

1 stop17h 01m

Ontario

lun. 4/14

6:00 am-3:00 pm

1 stop17h 00m

$548

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

lun. 5/19

9:25 pm-9:55 pm

1 stop16h 30m

Ontario

jue. 6/5

9:50 am-7:00 pm

1 stop17h 10m

$833

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

jue. 4/17

8:35 pm-6:00 pm

1 stop37h 25m

Ontario

dom. 4/20

12:10 am-7:35 pm

1 stop27h 25m

$845

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

mar. 5/20

6:20 pm-10:46 pm

1 stop20h 26m

Ontario

mar. 6/3

6:00 am-5:55 pm

1 stop19h 55m

$924

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

mié. 4/23

5:25 pm-9:58 pm

2 stops20h 33m

Ontario

mar. 4/29

2:44 pm-3:30 pm

1 stop32h 46m

$954

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

mié. 4/9

9:25 pm-9:50 pm

1 stop16h 25m

Ontario

jue. 5/29

9:50 am-7:00 pm

1 stop17h 10m

$1,041

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

dom. 5/25

6:20 pm-11:36 pm

1 stop21h 16m

$336

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

mar. 4/1

4:50 pm-8:42 pm

2 stops19h 52m

$437

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

mar. 6/3

8:45 pm-6:20 pm

2 stops37h 35m

$480

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

lun. 6/2

9:25 pm-9:55 pm

1 stop16h 30m

$539

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 18 results
1
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Compare providers for flights from Seoul 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 Seoul to Ontario in March.
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 Seoul-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seoul-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seoul-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seoul-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 Seoul-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 Seoul to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Seoul 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 Seoul to Ontario

What is the cheapest month to book a flight from Seoul to Ontario?

Currently, August is the cheapest month in which you can book a flight from Seoul to Ontario (average of $246). Flying from Seoul to Ontario in March is currently the most expensive (average of $326). 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 SEL to ONT?

Find hourly flight availability from Seoul 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 marzo 26, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seoul to Ontario as you normally would.

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 marzo 26, 2025.
Read reviews from past customers who have flown Japan Airlines, China Airlines and Alaska Airlines from Seoul to Ontario. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Japan Airlines
8.3
Very good
1,440 reviews

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Crew

8.7

Food

7.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Japan Airlines
8.3
Very good
1,440 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Crew

8.7

Food

7.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
China Airlines
8.2
Very good
722 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Crew

8.7

Food

7.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Alaska Airlines
8.0
Very good
9,789 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Crew

8.7

Food

7.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Delta
8.0
Very good
7,891 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Crew

8.7

Food

7.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Hawaiian Airlines
7.9
Good
2,331 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Crew

8.7

Food

7.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

Related info for your journey

Find useful and relevant information for your journey from Seoul 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 Seoul?

    If you book a flight to Ontario from Seoul, 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 Seoul to Ontario per day from 1 airline.

  • What are the cheapest airlines flying from Seoul to Ontario round-trip?

    Our cheapest airline available from Seoul to Ontario is United Airlines. Our recent data shows that you can find tickets from as low as $548 on this airline. Additional options worth looking into are Alaska Airlines and China Airlines, starting at $833 and $845 round-trip.

  • What are the cheapest airlines to fly from Seoul to Ontario one-way?

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $437. Users have also found prices from $480 and $539 on WestJet and Alaska Airlines, respectively.

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

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

  • How can I find direct flights from Seoul to Ontario?

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

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

    Yes. Cheapflights offers flight deals from Seoul 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 Seoul to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Seoul to Ontario (average of $246). Flying from Seoul to Ontario in March is currently the most expensive (average of $326). 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 Seoul to Ontario

Discover the top airline that operate flights from Seoul 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 marzo 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$674Average$782FlexibilityNo cancel feeOn-time69%
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