Flight Reliability
UA 4817 · United Airlines
Houston → AMA (IAH–AMA)97% of its flights flew this route. The rest (IAH–BTR, RIC–IAD) are included in these numbers.
89
Pretty Reliable
WanderNerd Reliability Score
- 85%
- Arrive within 15 minutes
- 1 min
- Average arrival delay
- 1.1%
- Cancelled
- 12 min early
- Median arrival delay
Based on 174 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
UA 4817 arrived on time 100% of the time on Tuesdays and just 72% on Fridays. That gap is worth planning around.
A bit ahead of the United Airlines network.
UA 4817 arrived on time 85% of the time, versus 79% across the United Airlines network.
Trending in the right direction.
UA 4817 arrived on time 91% of the time over the last three months in the data, compared with 83% in the three months before that.
The breakdown
- Mon85%(26 flights)
- Tue100%(10 flights)
- Wed90%(20 flights)
- Thu86%(28 flights)
- Fri72%(29 flights)
- Sat90%(30 flights)
- Sun83%(29 flights)
- 12–3 PM85%(168 flights)
- 6–9 PM—(1 flights)
- 9 PM–12 AM—(3 flights)
83%
May
Jun 82% → May 83% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 82% | 28 |
| July 2025 | 77% | 26 |
| August 2025 | 80% | 25 |
| September 2025 | 91% | 22 |
| October 2025 | 96% | 25 |
| December 2025 | 93% | 14 |
| May 2026 | 83% | 24 |
- Departures on time
- 87%
- Diverted
- 0%
- Flights flown
- 172
- Months covered
- 10
Same route, other flights
Keep nerding
Based on 174 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.