Time: The transfer time between Haneda and Narita can take approximately 1.5 to 2.5 hours, depending on the mode of transportation, traffic conditions, and your specific terminals at both airports. It's essential to allow extra time for security checks, customs, and any unforeseen delays.

In 2026, a 4-hour window to transfer from Narita (NRT) to Haneda (HND) is extremely tight and generally not recommended for international-to-international connections. The travel distance between the two airports is about 80 kilometers (50 miles). While the "Airport Limousine Bus" or the "Access Express" train can make the trip in about 75 to 90 minutes, you must also account for clearing immigration and customs at Narita (which can take 45–60 mins), collecting luggage, and then re-checking bags and clearing security at Haneda (another 45–60 mins). This leaves you with zero margin for flight delays or traffic congestion on the Shuto Expressway. For 2026 travelers, a 6-hour buffer is the "safe" minimum for this transfer. If you are stuck with a 4-hour window, your best bet is the direct bus, as it eliminates the need to navigate the complex train stations with heavy luggage, but you should be prepared for the very real possibility of missing your connecting flight.