Route
LHR - ICN is the first comparison, but nearby UK departure airports can shift the total.

Asia
South Korea trips should keep Incheon transfer time, late arrivals, and neighbourhood choice visible.
Planning board
LHR - ICN is the first comparison, but nearby UK departure airports can shift the total.
Myeongdong, Gangnam, and Hongdae bases
Late arrivals need first-night planning
Nearby country boards
India routes need baggage, layover, and late-arrival hotel strategy checked before price alone.
Japan planning should compare Haneda, Narita, Kansai, first-night hotels, and rail timing together.
Singapore is a strong stopover when Changi timing, hotel check-in, and recovery nights are planned together.
Thailand trips need airport, river, island-transfer, and first-night hotel planning on the same board.