Route
SJU → IAH
Luis Munoz Marin International Airport George Bush Intercontinental Airport
2,007 miles
Return route IAH → SJU →
How punctual is this route?
- On-time arrivals
- 88.7%
- Less than 15 minutes late
- Cancelled
- 0.6%
- Of scheduled flights
- Average delay when late
- 62 min
- Flights arriving 15+ minutes late
- Flights tracked
- 909
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 54%
- Airline (crew, maintenance, cleaning) 26%
- Air traffic control & airport 20%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 94.1% | 68 |
| October 2025 | 78.6% | 70 |
| November 2025 | 79.4% | 68 |
| December 2025 | 87.9% | 91 |
| January 2026 | 88.3% | 81 |
| February 2026 | 89.2% | 67 |
| March 2026 | 88.2% | 76 |
| April 2026 | 88.3% | 60 |
| May 2026 | 91.7% | 72 |
| June 2026 | 90.0% | 90 |
| July 2026 | 93.5% | 93 |
| August 2026 | 93.2% | 73 |
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 | 864 | 89.5% | 0.5% | 59 min |
| NK | 45 | 72.7% | 2.2% | 84 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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