Generally, the cheapest month to fly to Tokyo is January, followed closely by February. This period falls immediately after the expensive New Year's holiday (Shogatsu) and before the "Sakura" (Cherry Blossom) peak in late March. During these winter months, airfare can be as much as 30% to 40% lower than during the summer or spring. While Tokyo is cold in January, it is also the sunniest month of the year with very little rain, making it excellent for photography and clear views of Mount Fuji. Another "budget window" occurs in June, which is Japan's rainy season (Tsuyu); while you might encounter daily showers, the humidity hasn't reached its oppressive August peak yet, and hotels are significantly discounted. To find the absolute lowest fares in 2026, it is recommended to avoid "Golden Week" (late April to early May) and the Obon festival in August, when domestic and international prices skyrocket. Booking your January flight at least 3 to 4 months in advance via a "multi-city" search can often uncover hidden deals on premium carriers like ANA or JAL.