Miami, FL → Boston, MA flight delays
MIA → BOS · all airlines · 333 flights · April 2026 · source: US BTS
This route is delayed
31%of the time, by +64 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
69%
Delayed 3h+
2.1%
Cancelled
0.3%
Avg when late
+64m
Best & worst day to fly
Most on-time
Saturday
delayed 21%
Worst
Monday
delayed 39%
Which airline is most punctual on MIA → BOS?
Americandelayed 28%
Deltadelayed 29%
Spiritdelayed 50%
Frequently asked
How often is the Miami, FL to Boston, MA flight delayed?
About 31% of MIA → BOS flights arrive late (15+ minutes), by an average of 64 minutes when they do, based on 333 flights in April 2026.
Which airline is most punctual on MIA → BOS?
American, delayed 28% of the time — the best of the 3 airlines flying this route.
What is the best day to fly MIA → BOS?
Saturday is the most on-time (delayed 21%), while Monday is the worst (delayed 39%).
Airport overviews