Best way to travel between Seoul, South Korea and Weihai, Shandong, China

A: Seoul, South Korea

B: Weihai, Shandong, China

Travel Modes: Price; Distance; Duration; CO2

train: $132.0; 459.38 km; 18h 50mins; 24.35 kgs

flight: $140.0; 498.75 km; 6h 38mins; 53.87 kgs

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Tranport	Distance	Time(hrs)	Cost(local)	Cost(usd)
Train	459.38 km	18h 50mins	805 CNY	132.0
Flight	498.75 km	6h 38mins	854 CNY	140.0

Take Train from Jongno 3-ga Station to Incheon Station: Time: 1h 19mins Cost: 12 CNY; $ 1.8 - 2.2 USD CO2 Emission: 2.19 kgs
Take Ferry from Incheon Station to Weihai: Time: 16h 29mins Cost: 793 CNY; $ 117.0 - 143.0 USD CO2 Emission: 53.54 kgs

Source: Rome2rio

Mode of travel comparision chart

The best and cheapest way to get from Seoul, South Korea and Weihai, Shandong, China is to travel by train, which will cost about 805 CNY or 118.80 USD.