Most travellers find the cheapest return flights to Boston when choosing a flight departing in March.
In general, most flyers find the cheapest time to book a flight to Boston is about 60 days prior.
Most of our users find that booking their departure to Boston on a Thursday is the cheapest. Conversely, departing on a Saturday seems to be the most expensive.
On average you can find the best deals on plane tickets to Boston when looking for flights with midday departure times.