Flight Reliability
UA 4740 · United Airlines
Milwaukee → Chicago (MKE–ORD)94% of its flights flew this route. The rest (DEN–ACV, CLT–ORD) are included in these numbers.
56
A Little Dicey
WanderNerd Reliability Score
- 68%
- Arrive within 15 minutes
- 21 min
- Average arrival delay
- 3.6%
- Cancelled
- 4 min
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
UA 4740 arrived on time 82% of the time on Tuesdays and just 62% on Sundays. That gap is worth planning around.
Lagging the United Airlines network.
UA 4740 arrived on time 68% of the time, versus 79% across the United Airlines network.
Keep a backup plan handy.
UA 4740 was cancelled 3.6% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon63%(51 flights)
- Tue82%(50 flights)
- Wed64%(52 flights)
- Thu69%(51 flights)
- Fri63%(49 flights)
- Sat74%(49 flights)
- Sun62%(50 flights)
- 6–9 AM—(1 flights)
- 9 AM–12 PM67%(127 flights)
- 12–3 PM68%(224 flights)
71%
May
Jun 77% → May 71% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 77% | 30 |
| July 2025 | 47% | 30 |
| August 2025 | 71% | 31 |
| September 2025 | 83% | 29 |
| October 2025 | 74% | 31 |
| November 2025 | 82% | 27 |
| December 2025 | 55% | 29 |
| January 2026 | 50% | 30 |
| February 2026 | 82% | 28 |
| March 2026 | 71% | 28 |
| April 2026 | 54% | 28 |
| May 2026 | 71% | 31 |
- Departures on time
- 73%
- Diverted
- 0%
- Flights flown
- 352
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 365 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.