Distance From Gangneung Airport (K-18) to Ontario International Airport, KAG - ONT Distance

The distance from Gangneung Airport (K-18) (KAG) to Ontario International Airport (ONT) is 5893 miles or 9484 kilometers or 5118 nautical miles.

The distance shown below is direct flight distance between airports. Straight-line distance does not account for the surface between the two points. It is the distance a bird or airplane would travel between the two points when flying above the surface. The straight line distance is the direct route between two points, regardless of whether or not there are roads that connect them.

---

How long does it take to travel from Gangneung ( South Korea ) to Ontario ( United States )?

A one-way nonstop (direct) flight between Gangneung and Ontario takes around 13 hours 32 minutes.

Estimated flight time from Gangneung Airport (K-18), Gangneung, South Korea to Ontario International Airport, Ontario, United States is 13 hours 32 minutes under avarage conditions. Your actual flying time may vary depending on wind direction/speed or weather conditions. This calculation does not include the departure and landing times of the aircraft. In addition, it does not cover the person identity check, ticket check-in and baggage collection times at the airport.

Travel Distance Between the Airports • KAG - ONT

Kilometers		9484 km
Statute Miles		5893 miles
Nautical Miles		5118 nm
Avg. Time of Flight		13 hours 32 minutes

Gangneung Airport (K-18) to Ontario International Airport Flight Route Map - KAG to ONT Flight Path

Location of Gangneung Airport (K-18) & Ontario International Airport is given below.
Click the map to view Gangneung to Ontario nonstop flight path and travel direction.

Click to see flight route on Google Map between Gangneung, South Korea and Ontario, United States. .

Nonstop flight route between Gangneung, South Korea and Ontario, United States.

Time Difference Between the Airports • KAG - ONT

Time difference between Gangneung (South Korea) and Ontario (United States) is 16 Hours.
Ontario time is 16 Hours behind Gangneung.

Location	Local Time
Gangneung (South Korea)	2026-05-03, 23:08:07 KST
Ontario (United States)	2026-05-03, 07:08:07 PDT

Why should you arrive 3 hours before international flight? Flyers who are traveling to an international destination should arrive at the airport earlier than domestic flyers. This is because international flights can have additional check-in requirements, like passport verification, that need to be completed before you receive your boarding pass.

Origin

Gangneung Airport (K-18) (KAG / RKNN) Gangneung, South Korea

Destination

Ontario International Airport (ONT / KONT) Ontario, United States