March to April: The weather starts to warm up in the spring, and the city starts to come alive again. This is a great time to visit if you want to avoid the extreme cold of winter and the high prices of summer.
September to November: The fall foliage in Boston is a sight to behold, and the weather is usually mild. This is a great time to visit if you want to enjoy the outdoors and take in the city's history and culture.
Note: Keep in mind that prices can fluctuate depending on the specific dates of your trip and special events or conventions happening in the city.