How long is the flight from Ontario to South Korea?

China Airlines, STARLUX Airlines, and Korean Air can get you from Ontario to South Korea in just under 21h 55m. Your travel time can differ by up to 5h 15m. There are 5984 mi between Ontario and South Korea. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines to fly from Ontario to South Korea one-way?

The cheapest airlines for a one-way flight from Ontario to South Korea are American Airlines ($81), Frontier ($119), and Southwest ($171).

In terms of precipitation, rainfall in South Korea ranges from 0.8 - 10.2 inches per month. July is typically the wettest month, when rainfall can reach 10.2 in. January is typically the driest time to visit South Korea when rainfall is around 0.8 in.

If weather is an important factor for your trip to South Korea, 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 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 28.4 F).

What are the most popular routes from Ontario to South Korea?

While some choose either Ontario - Busan Gimhae or Ontario - Seoul Gimpo Intl, Ontario - Incheon Intl is the most popular route from Ontario to South Korea.

What are the most popular airlines that fly from Ontario to South Korea?

The most popular airlines flying from Ontario to South Korea are American Airlines, Southwest and Frontier. Something to consider prior to booking your flight.

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

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

What airport do you fly from for flights from Ontario to South Korea?

If you book a flight to South Korea from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

Can I find deals for flights from Ontario to South Korea that include hotel bookings?

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

How can I find direct flights from Ontario to South Korea?

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

Can I find deals for business class flights from Ontario to South Korea?

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

$381+ Cheap Flights from Ontario to South Korea

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Cheap flight deals from Ontario to South Korea

Cheapest

Best

Last-minute

One-way

Cheapest flights from Ontario to South Korea
Explore the most affordable flight options available from Ontario to South Korea. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 29, 2026.

Mon 10/1912:01 pm -

1 stop17h 39m

Mon 11/167:45 pm -

1 stop16h 43m

Deal found 8/24

$701

Thu 9/2412:07 pm -

1 stop24h 18m

Thu 10/19:00 pm -

1 stop14h 36m

Deal found 8/26

$873

Mon 11/912:01 pm -

1 stop24h 09m

Mon 11/169:00 pm -

1 stop15h 28m

Deal found 8/27

$895

Mon 10/512:07 pm -

1 stop17h 33m

Thu 10/1512:35 pm -

1 stop21h 25m

Deal found 8/24

$924

Mon 9/1412:07 pm -

1 stop17h 33m

Mon 9/217:15 pm -

1 stop16h 21m

Deal found 8/24

$936

Mon 9/2112:07 pm -

1 stop17h 33m

Thu 10/19:00 pm -

1 stop14h 36m

Deal found 8/27

$937

Sun 10/1112:10 am -

1 stop19h 05m

Thu 10/2212:35 pm -

1 stop21h 25m

Deal found 8/26

$938

Sat 9/192:30 pm -

2 stops21h 55m

Sat 9/269:00 pm -

2 stops26h 04m

Deal found 8/26

$950

Fri 11/612:01 pm -

1 stop24h 59m

Sat 11/148:50 pm -

2 stops31h 26m

Deal found 8/24

$952

Sun 9/1312:45 am -

1 stop26h 50m

Wed 9/308:35 pm -

1 stop37h 25m

Deal found 8/28

$953

Mon 9/712:45 am -

1 stop18h 30m

Wed 9/3010:30 am -

1 stop23h 30m

Deal found 8/26

$968

Mon 8/3112:45 am -

1 stop26h 15m

Wed 9/3010:30 am -

1 stop23h 30m

Deal found 8/27

$969

Best flights from Ontario to South Korea
Discover carefully curated flight deals from Ontario to South Korea that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 29, 2026.

Tue 9/812:45 am -

1 stop26h 15m

Wed 9/3010:30 am -

1 stop23h 30m

Deal found 8/28

$969

Fri 10/3010:45 pm -

1 stop27h 10m

Fri 11/1312:30 pm -

1 stop20h 25m

Deal found 8/25

$975

Thu 9/106:00 am -

2 stops21h 55m

Mon 9/147:55 am -

2 stops30h 45m

Deal found 8/24

$1,114

Wed 2/176:00 am -

2 stops35h 30m

Tue 2/2312:20 am -

2 stops39h 19m

Deal found 8/28

$1,172

Tue 9/156:08 am -

1 stop16h 52m

Tue 9/2911:30 am -

1 stop14h 53m

Deal found 8/28

$1,258

Mon 9/712:45 am -

2 stops25h 30m

Tue 9/158:10 am -

2 stops26h 30m

Deal found 8/27

$1,349

Tue 9/812:45 am -

1 stop26h 15m

Wed 10/1410:30 am -

1 stop23h 30m

Deal found 8/26

$969

Sat 10/3110:45 pm -

1 stop20h 45m

Fri 11/1312:30 pm -

1 stop20h 25m

Deal found 8/24

$975

Sun 9/1312:45 am -

1 stop26h 15m

Wed 9/1610:30 am -

1 stop23h 30m

Deal found 8/27

$993

Mon 10/1911:30 pm -

1 stop20h 00m

Mon 11/1612:30 pm -

1 stop20h 25m

Deal found 8/24

$1,090

Mon 9/2112:10 am -

1 stop19h 05m

Wed 10/2810:10 am -

1 stop23h 55m

Deal found 8/26

$993

Wed 11/186:00 am -

1 stop17h 15m

Wed 11/2512:45 pm -

2 stops25h 06m

Deal found 8/28

$1,262

Wed 11/116:00 am -

2 stops35h 30m

Fri 11/2012:20 am -

2 stops40h 11m

Deal found 8/24

$1,282

Sun 11/2211:55 am -

2 stops38h 50m

Tue 12/17:40 am -

2 stops31h 59m

Deal found 8/25

$2,624

Fri 9/1812:10 am -

1 stop27h 25m

Wed 10/1412:35 pm -

1 stop21h 25m

Deal found 8/28

$996

Wed 9/235:00 am -

2 stops31h 20m

Wed 9/304:50 pm -

1 stop14h 32m

Deal found 8/26

$1,262

Sun 9/1312:45 am -

1 stop24h 40m

Mon 9/219:05 am -

2 stops24h 00m

Deal found 8/24

$1,413

Mon 9/2112:10 am -

1 stop27h 25m

Sat 10/1012:35 pm -

1 stop21h 25m

Deal found 8/28

$996

Sun 10/181:52 pm -

2 stops53h 38m

Thu 10/224:50 pm -

1 stop14h 32m

Deal found 8/28

$1,284

Sat 10/312:10 am -

2 stops26h 00m

Sun 10/117:25 am -

2 stops26h 35m

Deal found 8/27

$1,469

Fri 10/301:32 pm -

2 stops23h 08m

Wed 11/1812:45 pm -

1 stop16h 44m

Deal found 8/28

$1,312

Mon 9/2112:10 am -

1 stop19h 05m

Thu 10/2911:50 am -

1 stop22h 15m

Deal found 8/26

$1,113

Wed 10/76:20 am -

2 stops21h 35m

Tue 10/277:40 am -

2 stops25h 32m

Deal found 8/26

$1,985

Fri 10/912:10 am -

1 stop19h 05m

Sun 10/2512:30 pm -

1 stop21h 35m

Deal found 8/25

$1,142

Wed 9/302:22 pm -

2 stops38h 53m

Wed 10/712:05 pm -

2 stops41h 25m

Deal found 8/25

$1,733

Tue 9/2212:10 am -

1 stop27h 25m

Wed 10/712:35 pm -

1 stop21h 25m

Deal found 8/25

$1,185

Mon 10/1911:59 pm -

2 stops25h 56m

Wed 10/288:15 am -

2 stops28h 56m

Deal found 8/24

$1,742

Sun 9/202:22 pm -

2 stops38h 53m

Sat 10/37:15 pm -

2 stops32h 32m

Deal found 8/26

$1,755

Tue 10/612:10 am -

1 stop27h 25m

Sat 10/2412:35 pm -

1 stop21h 25m

Deal found 8/25

$1,237

Sat 9/122:22 pm -

2 stops35h 33m

Sat 9/268:00 am -

2 stops28h 09m

Deal found 8/28

$1,768

Last-minute flights from Ontario to South Korea
Discover last-minute flight deals from Ontario to South Korea. Data last updated August 29, 2026 and is based on user searches.

Mon 8/3112:45 am -

1 stop26h 15m

Wed 9/3010:30 am -

1 stop23h 30m

Deal found 8/27

$969

Mon 8/3112:45 am -

1 stop18h 30m

Tue 9/810:30 am -

1 stop24h 10m

Deal found 8/26

$970

Mon 9/712:45 am -

1 stop18h 30m

Wed 9/3010:30 am -

1 stop23h 30m

Deal found 8/26

$968

Sun 9/1312:45 am -

1 stop26h 50m

Wed 9/308:35 pm -

1 stop37h 25m

Deal found 8/28

$953

Mon 9/1412:07 pm -

1 stop17h 33m

Mon 9/217:15 pm -

1 stop16h 21m

Deal found 8/24

$936

Thu 9/1712:10 am -

1 stop27h 25m

Thu 9/248:35 pm -

1 stop37h 25m

Deal found 8/27

$972

Sat 9/192:30 pm -

2 stops21h 55m

Sat 9/269:00 pm -

2 stops26h 04m

Deal found 8/26

$950

Sun 9/2012:10 am -

1 stop19h 05m

Wed 10/712:35 pm -

1 stop21h 25m

Deal found 8/27

$963

Mon 9/2112:07 pm -

1 stop17h 33m

Thu 10/19:00 pm -

1 stop14h 36m

Deal found 8/27

$937

Mon 9/2112:10 am -

1 stop27h 25m

Mon 10/512:35 pm -

1 stop21h 25m

Deal found 8/25

$974

Thu 9/2412:07 pm -

1 stop24h 18m

Thu 10/19:00 pm -

1 stop14h 36m

Deal found 8/26

$873

Tue 9/2912:10 am -

1 stop27h 25m

Thu 10/2212:35 pm -

1 stop21h 25m

Deal found 8/25

$973

One-way flights from Ontario to South Korea
Search for one-way flight options from Ontario to South Korea. Find affordable one-way fares based on user searches. Data last updated August 29, 2026.

Fri 9/1812:07 pm -

1 stop17h 33m

Deal found 8/27

$381

Fri 10/2312:01 pm -

1 stop17h 39m

Deal found 8/24

$412

Mon 10/1912:01 pm -

1 stop17h 39m

Deal found 8/27

$414

Mon 9/2112:07 pm -

1 stop17h 33m

Deal found 8/25

$415

Fri 12/47:11 am -

1 stop21h 09m

Deal found 8/25

$467

Mon 10/2612:01 pm -

1 stop24h 59m

Deal found 8/25

$468

Sun 10/1812:01 pm -

1 stop17h 39m

Deal found 8/27

$500

Wed 11/257:15 am -

1 stop21h 05m

Deal found 8/24

$507

Fri 10/3011:50 pm -

1 stop19h 30m

Deal found 8/24

$529

Mon 9/2112:10 am -

1 stop27h 25m

Deal found 8/28

$547

Wed 10/2811:50 pm -

1 stop27h 25m

Deal found 8/27

$548

Sun 9/2012:10 am -

1 stop19h 05m

Deal found 8/26

$548

Find flight deals from Ontario to South Korea

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$701 (Trip.com)
One-way from	$381 (Trip.com)
Popular in	December
Cheapest in	August
Average price	$874

Provider with most accurate pricing for Los Angeles-Seoul (SEL) flight deals.

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Provider most trusted by Cheapflights users for Los Angeles-Seoul (SEL) flights.

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From Ontario to South Korea

Search Deals

One-way flight from Ontario to South Korea

Search Deals

Highest demand for flights based on searches. 3% potential increase in price ($42 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to South Korea that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBusan

ONT Ontario - PUS Busan Gimhae

ONTPUS

Ontario

Tue 9/8

12:45 am-7:00 pm

1 stop26h 15m

Busan Gimhae

Wed 9/30

10:30 am-6:00 pm

1 stop23h 30m

$969

OntarioBusan

ONT Ontario - PUS Busan Gimhae

ONTPUS

Ontario

Tue 9/8

12:45 am-7:00 pm

1 stop26h 15m

Busan Gimhae

Wed 10/14

10:30 am-6:00 pm

1 stop23h 30m

$969

OntarioBusan

ONT Ontario - PUS Busan Gimhae

ONTPUS

Ontario

Fri 10/30

10:45 pm-5:55 pm

1 stop27h 10m

Busan Gimhae

Fri 11/13

12:30 pm-3:55 pm

1 stop20h 25m

$975

OntarioBusan

ONT Ontario - PUS Busan Gimhae

ONTPUS

Ontario

Sat 10/31

10:45 pm-11:30 am

1 stop20h 45m

Busan Gimhae

Fri 11/13

12:30 pm-3:55 pm

1 stop20h 25m

$975

OntarioBusan

ONT Ontario - PUS Busan Gimhae

ONTPUS

Ontario

Sun 9/13

12:45 am-7:00 pm

1 stop26h 15m

Busan Gimhae

Wed 9/16

10:30 am-6:00 pm

1 stop23h 30m

$993

OntarioBusan

ONT Ontario - PUS Busan Gimhae

ONTPUS

Ontario

Mon 9/21

12:10 am-11:15 am

1 stop19h 05m

Busan Gimhae

Wed 10/28

10:10 am-6:05 pm

1 stop23h 55m

$993

OntarioIncheon

ONT Ontario - ICN Incheon Intl

ONTICN

Ontario

Fri 9/18

12:10 am-7:35 pm

1 stop27h 25m

Incheon Intl

Wed 10/14

12:35 pm-6:00 pm

1 stop21h 25m

$996

OntarioIncheon

ONT Ontario - ICN Incheon Intl

ONTICN

Ontario

Mon 9/21

12:10 am-7:35 pm

1 stop27h 25m

Incheon Intl

Sat 10/10

12:35 pm-6:00 pm

1 stop21h 25m

$996

OntarioBusan

ONT Ontario - PUS Busan Gimhae

ONTPUS

Ontario

Mon 10/19

11:30 pm-11:30 am

1 stop20h 00m

Busan Gimhae

Mon 11/16

12:30 pm-3:55 pm

1 stop20h 25m

$1,090

OntarioBusan

ONT Ontario - PUS Busan Gimhae

ONTPUS

Ontario

Mon 9/21

12:10 am-11:15 am

1 stop19h 05m

Busan Gimhae

Thu 10/29

11:50 am-6:05 pm

1 stop22h 15m

$1,113

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/24

Showing 1-10 of 60 resultsSorted by cheapest first

...

Best time to book a flight from Ontario to South Korea

Have a flexible travel schedule? Discover the best time to fly to South Korea from Ontario with our price prediction graph.

ONT-ICN

ONT-PUS

ONT-GMP

ONT-TAE

ONT-CJU

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 Ontario to South Korea

ONT-KR0

ONT-ICN

ONT-PUS

ONT-GMP

ONT-TAE

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing South Korea

Read through reviews of airlines operating flights from Ontario to South Korea, such as China Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

China Airlines

8.3

Very good

844 reviews

Reviews

1 / 20

10.0

Excellent

A,Feb 2026

SEA - TPE

China Airlines has improved significantly over the years. This is the first time we fly on their business class after 20+ years. Both hardware and services impressed us. Will definitely fly with again in the future.

China Airlines

8.3

Very good

844 reviews

China Airlines

8.3

Very good

844 reviews

Reviews

1 / 20

10.0

Excellent

A,Feb 2026

SEA - TPE

Related info for your journey

What airport do you fly from for flights from Ontario to South Korea?
If you book a flight to South Korea from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.
How long is the flight from Ontario to South Korea?
China Airlines, STARLUX Airlines, and Korean Air can get you from Ontario to South Korea in just under 21h 55m. Your travel time can differ by up to 5h 15m. There are 5984 mi between Ontario and South Korea. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
What are the cheapest airlines to fly from Ontario to South Korea one-way?
The cheapest airlines for a one-way flight from Ontario to South Korea are American Airlines ($81), Frontier ($119), and Southwest ($171).
What are the most popular routes from Ontario to South Korea?
While some choose either Ontario - Busan Gimhae or Ontario - Seoul Gimpo Intl, Ontario - Incheon Intl is the most popular route from Ontario to South Korea.
Can I find deals for flights from Ontario to South Korea that include hotel bookings?
Yes. In addition to deals on Ontario to South Korea flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to South Korea?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to South Korea.
Can I find deals for business class flights from Ontario to South Korea?
Yes. Cheapflights offers flight deals from Ontario to South Korea by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to South Korea

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Top airline flying from Ontario to South Korea

Airline	Cheapest	Average	Flexibility	On-time
China Airlines	Cheapest$854	Average$944	FlexibilityNo cancel fee	On-time70%

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$381+ Cheap flights from Ontario (ONT) to South Korea

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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from Ontario to South Korea

Cheapest flights from Ontario to South KoreaExplore the most affordable flight options available from Ontario to South Korea. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 29, 2026.

Explore the most affordable flight options available from Ontario to South Korea. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 29, 2026.

Best flights from Ontario to South KoreaDiscover carefully curated flight deals from Ontario to South Korea that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 29, 2026.

Discover carefully curated flight deals from Ontario to South Korea that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 29, 2026.

Last-minute flights from Ontario to South KoreaDiscover last-minute flight deals from Ontario to South Korea. Data last updated August 29, 2026 and is based on user searches.

Discover last-minute flight deals from Ontario to South Korea. Data last updated August 29, 2026 and is based on user searches.

One-way flights from Ontario to South KoreaSearch for one-way flight options from Ontario to South Korea. Find affordable one-way fares based on user searches. Data last updated August 29, 2026.

Search for one-way flight options from Ontario to South Korea. Find affordable one-way fares based on user searches. Data last updated August 29, 2026.

Find flight deals from Ontario to South Korea

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One-way from

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Use the filters below to find and compare flights from Ontario to South Korea that are best for you.

Best time to book a flight from Ontario to South Korea

Have a flexible travel schedule? Discover the best time to fly to South Korea from Ontario with our price prediction graph.

Cheapflights Insights

Reviews of airlines servicing South Korea

Read through reviews of airlines operating flights from Ontario to South Korea, such as China Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

What airport do you fly from for flights from Ontario to South Korea?

How long is the flight from Ontario to South Korea?

What are the cheapest airlines to fly from Ontario to South Korea one-way?

What are the most popular routes from Ontario to South Korea?

Can I find deals for flights from Ontario to South Korea that include hotel bookings?

How can I find direct flights from Ontario to South Korea?

Can I find deals for business class flights from Ontario to South Korea?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to South Korea

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to South Korea by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Ontario to South Korea by cabin class

Find flights from Ontario to South Korea, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Ontario and South Korea flights

Browse other Ontario and South Korea flight options. Last updated on August 29, 2026.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2026

Ontario to South Korea flights

Consider these flights traveling from Ontario to South Korea.

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Consider these flights traveling to South Korea regions.

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Cheapest flights from Ontario to South Korea
Explore the most affordable flight options available from Ontario to South Korea. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 29, 2026.

Best flights from Ontario to South Korea
Discover carefully curated flight deals from Ontario to South Korea that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 29, 2026.

Last-minute flights from Ontario to South Korea
Discover last-minute flight deals from Ontario to South Korea. Data last updated August 29, 2026 and is based on user searches.

One-way flights from Ontario to South Korea
Search for one-way flight options from Ontario to South Korea. Find affordable one-way fares based on user searches. Data last updated August 29, 2026.