South Korea

$375+ Cheap flights from Ontario (ONT) to South Korea

ONT — ICN
Dec 4 — Dec 111
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to South Korea with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to South Korea

Cheapest flights from Ontario to South Korea

Tue 12/17:06 pm -
1 stop33h 14m
Wed 12/97:45 pm -
1 stop20h 38m
Deal found 11/3$696
Tue 12/17:06 pm -
1 stop33h 14m
Mon 12/77:45 pm -
1 stop20h 38m
Deal found 11/3$702
Sat 12/56:00 am -
2 stops22h 20m
Sun 12/137:45 pm -
1 stop20h 38m
Deal found 11/2$749
Wed 12/28:00 am -
2 stops20h 20m
Wed 12/97:45 pm -
1 stop20h 38m
Deal found 11/3$783
Wed 12/28:00 am -
2 stops20h 20m
Sat 12/57:45 pm -
1 stop20h 38m
Deal found 11/1$788
Sun 11/110:50 pm -
1 stop19h 00m
Thu 11/1211:50 am -
1 stop22h 15m
Deal found 10/31$1,120
Sat 11/79:45 pm -
1 stop20h 45m
Fri 11/1312:30 pm -
1 stop20h 25m
Deal found 10/31$1,147
Sun 11/810:50 pm -
1 stop19h 00m
Fri 11/1311:50 am -
1 stop22h 15m
Deal found 11/2$1,177
Sun 11/86:20 am -
2 stops20h 15m
Fri 11/1310:25 am -
2 stops23h 51m
Deal found 11/3$1,191
Sun 11/810:50 pm -
1 stop28h 10m
Fri 11/133:00 pm -
1 stop19h 05m
Deal found 11/2$1,209
Sat 11/74:09 pm -
2 stops35h 36m
Fri 11/134:10 pm -
2 stops23h 56m
Deal found 10/31$1,277
Sun 11/86:00 am -
2 stops33h 10m
Fri 11/1312:00 pm -
2 stops28h 06m
Deal found 11/2$1,347

Find flight deals from Ontario to South Korea

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$696
(Trip.com)

One-way from

$375
(Trip.com)

Popular in

June

Cheapest in

November

Average price

$831
Provider with most accurate pricing for Los Angeles-Seoul (SEL) flight deals.
Provider most trusted by Cheapflights users for Los Angeles-Seoul (SEL) flights.
From Ontario to South Korea
One-way flight from Ontario to South Korea
Highest demand for flights based on searches. 15% potential increase in price ($182 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
Average for round-trip flights in November 2026

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

Mon 4/26

12:10 am-11:15 am

1 stop19h 05m

Busan Gimhae

Wed 12/31

12:00 am-7:00 am

Nonstop0h 00m

$595

OntarioBusan

ONT Ontario - PUS Busan Gimhae

ONTPUS

Ontario

Thu 3/11

6:00 am-8:10 am

2 stops33h 10m

Busan Gimhae

Wed 12/31

12:00 am-7:00 am

Nonstop0h 00m

$674

OntarioIncheon

ONT Ontario - ICN Incheon Intl

ONTICN

Ontario

Mon 1/4

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Wed 12/31

12:00 am-7:00 am

Nonstop0h 00m

$683

OntarioIncheon

ONT Ontario - ICN Incheon Intl

ONTICN

Ontario

Sat 1/9

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Wed 12/31

12:00 am-7:00 am

Nonstop0h 00m

$683

OntarioBusan

ONT Ontario - PUS Busan Gimhae

ONTPUS

Ontario

Tue 4/27

6:00 am-7:45 am

2 stops33h 45m

Busan Gimhae

Wed 12/31

12:00 am-7:00 am

Nonstop0h 00m

$712

OntarioIncheon

ONT Ontario - ICN Incheon Intl

ONTICN

Ontario

Tue 1/12

3:31 pm-5:20 am

1 stop20h 49m

Incheon Intl

Wed 12/31

12:00 am-7:00 am

Nonstop0h 00m

$715

OntarioBusan

ONT Ontario - PUS Busan Gimhae

ONTPUS

Ontario

Mon 12/7

10:50 pm-6:50 pm

1 stop27h 00m

Busan Gimhae

Wed 12/31

12:00 am-7:00 am

Nonstop0h 00m

$757

OntarioIncheon

ONT Ontario - ICN Incheon Intl

ONTICN

Ontario

Tue 11/17

5:00 am-5:40 am

2 stops31h 40m

Incheon Intl

Wed 12/31

12:00 am-7:00 am

Nonstop0h 00m

$786

OntarioIncheon

ONT Ontario - ICN Incheon Intl

ONTICN

Ontario

Fri 2/26

5:05 pm-5:45 pm

2 stops31h 40m

Incheon Intl

Wed 12/31

12:00 am-7:00 am

Nonstop0h 00m

$787

OntarioIncheon

ONT Ontario - ICN Incheon Intl

ONTICN

Ontario

Fri 1/22

5:07 pm-5:45 pm

2 stops31h 38m

Incheon Intl

Wed 12/31

12:00 am-7:00 am

Nonstop0h 00m

$787

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Showing 1-10 of 39 resultsSorted by cheapest first
1
2
3
4

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.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Ontario to South Korea

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.

Boarding

8.3

Comfort

8.0

Food

7.8

Entertainment

8.0

Crew

8.5

Overall

8.3

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.

Boarding

8.3

Comfort

8.0

Food

7.8

Entertainment

8.0

Crew

8.5

Overall

8.3

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.

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?

    United Airlines, China Airlines, and Delta can get you from Ontario to South Korea in just under 15h 30m. Your travel time can differ by up to 11h 20m. There are 6006 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 ($120), and Southwest ($183).

  • 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?

    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

Top airline flying from Ontario to South Korea

AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$857Average$934FlexibilityNo cancel feeOn-time70%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.