St Louis to Tokyo (SUS–HND) — Airlines, Schedules & Connections

US citizens enter Japan visa-free for up to 90 days for tourism or business. No pre-registration required. Passport must be valid for the duration of stay.

Complete the Visit Japan Web form online before arrival to speed up immigration and customs processing. Declare cash over JPY 1,000,000. Bringing meat, fruit, or plant products requires declaration; penalties for violations are strict.

Keikyu Line to Shinagawa (13 min, ¥310) and Tokyo Monorail to Hamamatsucho (18 min, ¥500) both connect to JR and Tokyo Metro networks. Terminal 3 (international) has direct access to both rail lines.Limousine buses serve Shinjuku, Shibuya, and major hotels (¥1,100, 40–60 min depending on traffic). Taxis to central Tokyo run ¥3,500–5,500. Haneda's proximity to Tokyo means ground transport is faster and cheaper than from Narita in virtually all cases.

Humid subtropical climate. Summers (June–September) are hot and humid (28–35°C) with a rainy season in June and typhoons possible July through October. Typhoons occasionally divert or cancel flights, but direct hits on Tokyo are less frequent than farther south. Humidity peaks in July and August.

Winters are cold and dry (2–10°C) with occasional light snow. Even minor snowfall disrupts Tokyo's ground operations since the city is not equipped for winter road treatment. Spring (April) is pleasant but windy. Fall (October–November) offers the best flying conditions.