Most travellers find the cheapest return flights to Boston when choosing a flight departing in February.
On average, from most locations, when planning your trip to Boston, try to book your flight in the region of 60 days in advance for the cheapest prices.
In general, booking your departure to Boston for a Wednesday represents the best deal on airfare. Try to avoid a Friday departure to stay away from the highest prices.
Typically, cheap prices to Boston are most often found for midday flights. Cheap prices are less likely for evening flights.