The best time to visit London depends on preferences - summer for good weather, winter for festive charm, autumn for foliage, and spring for blossoms. [ more ]
These are the Best Times of Year to Visit Paris - Frenchly
The summer months are crowded in Paris due to tourists and locals leaving, making it challenging to visit major attractions.
Traveling off-season, particularly in October, November, or January through March, is ideal to avoid crowds and enjoy Paris with fewer tourists. [ more ]