Route
MIA → BOS
Miami International Airport Boston Logan International Airport
How punctual is this route?
- On-time arrivals
- 69.8%
- Less than 15 minutes late
- Cancelled
- 2.2%
- Of scheduled flights
- Average delay when late
- 75 min
- Flights arriving 15+ minutes late
- Flights tracked
- 3,366
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 41%
- Airline (crew, maintenance, cleaning) 30%
- Air traffic control & airport 25%
- Extreme weather 4%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 65.3% | 224 |
| October 2025 | 56.9% | 250 |
| November 2025 | 76.1% | 257 |
| December 2025 | 74.4% | 276 |
| January 2026 | 77.3% | 305 |
| February 2026 | 72.8% | 312 |
| March 2026 | 63.1% | 325 |
| April 2026 | 69.2% | 333 |
| May 2026 | 77.4% | 280 |
| June 2026 | 73.5% | 264 |
| July 2026 | 62.0% | 268 |
| August 2026 | 69.0% | 272 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| American Airlines | 2,271 | 71.1% | 1.7% | 73 min |
| Delta Air Lines | 890 | 69.6% | 2.7% | 81 min |
| NK | 175 | 54.3% | 6.9% | 72 min |
| Republic Airways | 25 | 76.0% | 0.0% | 137 min |
| JetBlue Airways | 4 | 25.0% | 0.0% | 67 min |
| Envoy Air | 1 | 100.0% | 0.0% | — |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
AA1074
39% late · 364 flights
-
AA1054
42% late · 362 flights
-
AA2539
42% late · 322 flights
-
DL1399
29% late · 227 flights
-
DL776
36% late · 184 flights
-
AA2764
6% late · 156 flights
-
AA1680
36% late · 135 flights
-
AA891
9% late · 108 flights
-
DL1362
44% late · 98 flights
-
NK3032
42% late · 96 flights
-
DL675
19% late · 83 flights
-
AA1538
29% late · 76 flights
-
AA1565
20% late · 76 flights
-
DL2217
34% late · 74 flights
-
AA2062
26% late · 71 flights
-
AA1589
19% late · 69 flights
-
AA1410
45% late · 62 flights
-
DL998
24% late · 62 flights
-
AA815
2% late · 60 flights
-
AA2247
12% late · 59 flights
-
AA1571
9% late · 44 flights
-
AA1894
9% late · 44 flights
-
DL1358
10% late · 41 flights
-
AA475
22% late · 40 flights
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