I think its around 8 - 10 hours. It depends on the flight.
In order to get a meaningful answer, you need to say where in Russia. Seoul-Vladivostok is a very short distance by comparson with, say, Seoul-Moscow or St.Peterburg.
Is there any flight from Karachi to Seoul Korea
Minneapolis/St Paul, MN (MSP) to Seoul (SEL) Shortest Flight Duration: 15 hours 50 mins via Tokyo
The flight distance from London to Seoul, South Korea is about 5,530 miles.
The flight time from Hong Kong to Seoul, South Korea is: 3 hours, 6 minutes
The flight time from Atlanta, Georgia to Seoul, South Korea is: 14 hours, 45 minutes
A typical flight from Seoul, South Korea to Cebu, Philippines takes about 3 hours and 46 minutes.
The flight distance from Seoul, South Korea to Melbourne is 5312 miles.
Flight:Los Angeles, CA (LAX) to Seoul (SEL)Flight Duration 12 hours 45Distance:The distance between Los Angeles, California and Seoul, South Korea is 5956 miles (9585 km).
The flight distance from Memphis, Tennessee to Seoul, South Korea is 6894 miles / 11095 kms.
24 hrs
The 1980 Summer Olympics were held in Moscow, Russia.