Top tips for finding cheap flights to Japan High season is considered to be July, August and September. The cheapest month to fly from the United States is September. Enter your preferred departure airport and travel dates into the search form above to unlock the latest Japan flight deals.

In 2026, June is typically the cheapest summer month to travel to Japan. This is primarily because June marks the start of "Tsuyu" (the rainy season) across much of the country, including Tokyo, Osaka, and Kyoto. While it doesn't rain every day, the increased humidity and cloud cover deter many tourists, leading to lower hotel rates and more competitive airfare compared to the peak "festival" months of July and August. In contrast, late July and August are significantly more expensive due to the massive influx of domestic travelers during the school holidays and the "Obon" period, as well as the popularity of major summer festivals (matsuri) and fireworks displays. If you don't mind carrying an umbrella and navigating the humidity, June offers a much more budget-friendly window with far fewer crowds at major landmarks. For those who want to avoid the rain entirely while staying on a budget, northern Hokkaido is an excellent alternative in June, as it remains largely unaffected by the rainy season and offers pleasantly cool temperatures before the mid-summer rush begins.