Flight time: Flights to South Korea from the UK usually take around 11 hours, although currently, it's more like 13 hours due to restrictions over Russian airspace. Direct flights to Seoul's Incheon International Airport are available from London, but if you're flying from other airports, you're likely to connect via hubs such as Paris, Helsinki, Doha or Dubai.
Transfer time: From Incheon Airport, you can take the AREX express train to Seoul Station in about 45 minutes or 1 hour for a regular train. Many buses are also available, as well as taxis, Uber or the local KakaoT ride-hailing service, which all take around 1 hour, depending on traffic.
Price: The AREX train into Seoul costs W11,000 (about €6), or around W4,750 (€2.70) for the non-express. Fares for a taxi vary according to the time of day, route and traffic but will usually set you back W50,000–W70,000 (€28–€40). Uber or KakaoT are slightly cheaper. Airport limousine buses start at around W5,500 (€3).