Route
IAH → MIA
George Bush Intercontinental Airport Miami International Airport
How punctual is this route?
- On-time arrivals
- 78.6%
- Less than 15 minutes late
- Cancelled
- 1.3%
- Of scheduled flights
- Average delay when late
- 97 min
- Flights arriving 15+ minutes late
- Flights tracked
- 3,665
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 43%
- Airline (crew, maintenance, cleaning) 35%
- Air traffic control & airport 17%
- Extreme weather 6%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 81.1% | 276 |
| October 2025 | 83.8% | 304 |
| November 2025 | 81.4% | 333 |
| December 2025 | 82.5% | 339 |
| January 2026 | 83.0% | 341 |
| February 2026 | 81.6% | 309 |
| March 2026 | 68.6% | 341 |
| April 2026 | 80.4% | 310 |
| May 2026 | 76.9% | 294 |
| June 2026 | 75.1% | 277 |
| July 2026 | 70.3% | 288 |
| August 2026 | 78.0% | 253 |
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 | 1,565 | 78.8% | 1.2% | 118 min |
| United Airlines | 1,438 | 82.0% | 0.3% | 62 min |
| NK | 323 | 68.8% | 3.7% | 84 min |
| Frontier Airlines | 196 | 69.0% | 6.1% | 172 min |
| Envoy Air | 129 | 78.3% | 0.0% | 55 min |
| Republic Airways | 14 | 64.3% | 0.0% | 173 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
AA1347
11% late · 361 flights
-
UA410
19% late · 257 flights
-
AA2144
8% late · 210 flights
-
UA1966
10% late · 163 flights
-
F91068
32% late · 157 flights
-
AA1047
9% late · 155 flights
-
UA1829
22% late · 154 flights
-
AA3258
15% late · 135 flights
-
UA759
7% late · 122 flights
-
NK1273
51% late · 97 flights
-
UA1457
25% late · 93 flights
-
UA2105
9% late · 92 flights
-
AA678
39% late · 86 flights
-
UA2740
25% late · 81 flights
-
UA2863
30% late · 77 flights
-
AA1931
59% late · 75 flights
-
AA1918
44% late · 74 flights
-
UA2657
12% late · 74 flights
-
AA2541
34% late · 71 flights
-
AA603
25% late · 64 flights
-
NK1319
22% late · 59 flights
-
MQ3954
20% late · 51 flights
-
AA2145
16% late · 44 flights
-
F91462
28% late · 39 flights
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