August is the cheapest month to fly this route, with average fares around $228 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $237 | $220 | ||
| June 2026 | $238 | $210 | Peak | |
| July 2026 | $230 | $210 | ||
| August 2026 | $228 | $210 | Best |
Departing on Tuesday offers the lowest average fares at $218. Sunday departures are the most expensive at $251, a difference of $33.
The best time to fly is August. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from Boston to Miami is August, with average round-trip fares around $228. The lowest fare found in August is $210.
Tuesday departures are the cheapest, averaging $218 round trip. The most expensive day is Sunday at $251.
Based on current pricing trends, booking for August travel offers the best value. Avoid June if possible, as fares average $238 compared to $228 in the cheapest month. May is a solid middle-ground option at $237.
Flying in August instead of June can save you approximately $10 per round trip. The cheapest month averages $228 while the most expensive averages $238.
Airlines, flight times, price calendar, and more for Boston to Miami
View BOS → MIA Details