Benchmarked strictly across TripTiming's 5 empirical pillars: Crowds, Weather, Vibes, Prices, and Safety.
Seoul emerges as the optimal October destination with an overall TripTiming Index of 68/100 vs 67/100 for Tokyo (+1 point advantage). Seoul captures optimal environmental comfort with 16°C daytime feels-like temperatures and 14% rain probability, compared to 20°C in Tokyo. Visitors also enjoy vibrant neighborhood street life. While Tokyo retains an edge in Price & Value (68/100 vs 52/100), Seoul's commanding performance in Weather Comfort secures the overall October recommendation.