Route
DEN → IAH
Denver International Airport George Bush Intercontinental Airport
How punctual is this route?
- On-time arrivals
- 79.6%
- Less than 15 minutes late
- Cancelled
- 0.3%
- Of scheduled flights
- Average delay when late
- 67 min
- Flights arriving 15+ minutes late
- Flights tracked
- 4,728
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 42%
- Airline (crew, maintenance, cleaning) 29%
- Air traffic control & airport 28%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 81.4% | 382 |
| October 2025 | 86.1% | 398 |
| November 2025 | 80.1% | 357 |
| December 2025 | 82.3% | 391 |
| January 2026 | 86.9% | 384 |
| February 2026 | 85.8% | 347 |
| March 2026 | 78.8% | 406 |
| April 2026 | 86.4% | 360 |
| May 2026 | 81.8% | 412 |
| June 2026 | 68.6% | 431 |
| July 2026 | 72.3% | 444 |
| August 2026 | 68.9% | 416 |
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 |
|---|---|---|---|---|
| United Airlines | 3,894 | 79.7% | 0.3% | 68 min |
| Frontier Airlines | 834 | 79.3% | 0.5% | 62 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA1720
10% late · 365 flights
-
UA320
3% late · 364 flights
-
UA475
26% late · 364 flights
-
UA1829
29% late · 341 flights
-
UA489
22% late · 340 flights
-
UA2419
21% late · 338 flights
-
F92996
26% late · 334 flights
-
F93206
14% late · 315 flights
-
UA1599
22% late · 201 flights
-
UA588
25% late · 189 flights
-
UA1587
24% late · 146 flights
-
UA2676
15% late · 133 flights
-
F93228
26% late · 121 flights
-
UA1915
12% late · 74 flights
-
UA1956
14% late · 72 flights
-
UA1585
27% late · 71 flights
-
UA726
27% late · 71 flights
-
UA1253
35% late · 63 flights
-
UA1299
19% late · 55 flights
-
UA738
15% late · 55 flights
-
UA1129
28% late · 47 flights
-
UA2791
48% late · 47 flights
-
UA1354
24% late · 37 flights
-
UA236
14% late · 37 flights
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