In general, when looking for the cheapest flight to Boston, try to choose a flight departing in March for the best deal.
Most flyers found that booking flight tickets 0 days in advance of their planned departure date is, on average, the best time to get cheap flights to Boston.
Most of our users find that booking their departure to Boston on a Saturday is the cheapest. Conversely, departing on a Friday seems to be the most expensive.
Generally, when visiting Boston, morning flights represent the best value. afternoon flights are likely to have higher prices.