Flight Reliability
UA 4436 · United Airlines
Chicago → SGF (ORD–SGF)99% of its flights flew this route. The rest (EWR–DTW) are included in these numbers.
71
Usually Fine
WanderNerd Reliability Score
- 75%
- Arrive within 15 minutes
- 13 min
- Average arrival delay
- 2.5%
- Cancelled
- 7 min early
- Median arrival delay
Based on 357 historical flights. Data through May 2026.
What the data says
Thursday is the weak spot.
UA 4436 arrived on time 81% of the time on Saturdays. On Thursdays: 71%.
A bit behind the United Airlines network.
UA 4436 arrived on time 75% of the time, versus 79% across the United Airlines network.
Recent months have been rougher.
UA 4436 arrived on time 62% of the time over the last three months in the data, compared with 71% in the three months before that.
The breakdown
- Mon77%(52 flights)
- Tue76%(50 flights)
- Wed75%(51 flights)
- Thu71%(52 flights)
- Fri72%(50 flights)
- Sat81%(47 flights)
- Sun72%(46 flights)
71%
May
Jun 83% → May 71% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 83% | 23 |
| July 2025 | 84% | 31 |
| August 2025 | 86% | 29 |
| September 2025 | 93% | 30 |
| October 2025 | 84% | 31 |
| November 2025 | 70% | 27 |
| December 2025 | 67% | 30 |
| January 2026 | 63% | 30 |
| February 2026 | 82% | 28 |
| March 2026 | 57% | 28 |
| April 2026 | 57% | 30 |
| May 2026 | 71% | 31 |
- Departures on time
- 74%
- Diverted
- 0%
- Flights flown
- 348
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 357 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.