Route
MIA → IAH
Miami International Airport George Bush Intercontinental Airport
How punctual is this route?
- On-time arrivals
- 78.8%
- Less than 15 minutes late
- Cancelled
- 1.2%
- Of scheduled flights
- Average delay when late
- 80 min
- Flights arriving 15+ minutes late
- Flights tracked
- 3,667
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 34%
- Airline (crew, maintenance, cleaning) 33%
- Air traffic control & airport 26%
- Extreme weather 7%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 80.8% | 276 |
| October 2025 | 80.2% | 304 |
| November 2025 | 79.2% | 332 |
| December 2025 | 82.2% | 340 |
| January 2026 | 84.7% | 342 |
| February 2026 | 82.3% | 310 |
| March 2026 | 69.0% | 341 |
| April 2026 | 78.4% | 310 |
| May 2026 | 74.6% | 294 |
| June 2026 | 79.1% | 277 |
| July 2026 | 74.6% | 287 |
| August 2026 | 79.7% | 254 |
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 | 1,566 | 71.5% | 1.1% | 72 min |
| United Airlines | 1,438 | 87.5% | 0.5% | 96 min |
| NK | 323 | 68.3% | 3.1% | 88 min |
| Frontier Airlines | 197 | 85.2% | 4.1% | 90 min |
| Envoy Air | 129 | 86.8% | 0.0% | 46 min |
| Republic Airways | 14 | 64.3% | 0.0% | 135 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
AA2230
32% late · 362 flights
-
UA1216
26% late · 305 flights
-
AA2541
34% late · 233 flights
-
F91067
14% late · 191 flights
-
UA470
14% late · 180 flights
-
AA2347
35% late · 137 flights
-
AA3258
7% late · 135 flights
-
UA2385
6% late · 101 flights
-
UA1743
7% late · 98 flights
-
NK1274
38% late · 96 flights
-
UA2074
5% late · 86 flights
-
AA1931
43% late · 76 flights
-
AA1918
23% late · 75 flights
-
UA2417
14% late · 71 flights
-
UA1913
4% late · 70 flights
-
AA603
18% late · 63 flights
-
AA678
28% late · 62 flights
-
NK1320
31% late · 59 flights
-
UA1927
16% late · 55 flights
-
UA1964
5% late · 55 flights
-
MQ3954
8% late · 51 flights
-
AA2145
9% late · 44 flights
-
AA3012
43% late · 44 flights
-
UA740
5% late · 43 flights
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