Boston, MA → Miami, FL flight delays
BOS → MIA · all airlines · 334 flights · April 2026 · source: US BTS
This route is delayed
24%of the time, by +71 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
76%
Delayed 3h+
1.5%
Cancelled
0%
Avg when late
+71m
Best & worst day to fly
Most on-time
Wednesday
delayed 11%
Worst
Sunday
delayed 44%
Which airline is most punctual on BOS → MIA?
Americandelayed 16%
Deltadelayed 28%
Spiritdelayed 52%
Frequently asked
How often is the Boston, MA to Miami, FL flight delayed?
About 24% of BOS → MIA flights arrive late (15+ minutes), by an average of 71 minutes when they do, based on 334 flights in April 2026.
Which airline is most punctual on BOS → MIA?
American, delayed 16% of the time — the best of the 3 airlines flying this route.
What is the best day to fly BOS → MIA?
Wednesday is the most on-time (delayed 11%), while Sunday is the worst (delayed 44%).
Airport overviews