July is the cheapest month to fly this route, with average fares around $230 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $262 | $220 | Peak | |
| June 2026 | $237 | $210 | ||
| July 2026 | $230 | $210 | Best | |
| August 2026 | $237 | $230 |
Departing on Tuesday offers the lowest average fares at $221. Monday departures are the most expensive at $255, a difference of $34.
The best time to fly is July. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from Miami to Boston is July, with average round-trip fares around $230. The lowest fare found in July is $210.
Tuesday departures are the cheapest, averaging $221 round trip. The most expensive day is Monday at $255.
Based on current pricing trends, booking for July travel offers the best value. Avoid May if possible, as fares average $262 compared to $230 in the cheapest month. August is a solid middle-ground option at $237.
Flying in July instead of May can save you approximately $32 per round trip. The cheapest month averages $230 while the most expensive averages $262.
Airlines, flight times, price calendar, and more for Miami to Boston
View MIA → BOS Details