Flight Reliability
UA 4974 · United Airlines
MDT → Washington (MDT–IAD)98% of its flights flew this route. The rest (IAD–ORF) are included in these numbers.
90
Nerd Approved
WanderNerd Reliability Score
- 86%
- Arrive within 15 minutes
- 5 min
- Average arrival delay
- 1.0%
- Cancelled
- 13 min early
- Median arrival delay
Based on 299 historical flights. Data through May 2026.
What the data says
Skip Thursday if you can.
UA 4974 arrived on time 92% of the time on Wednesdays. On Thursdays: 82%.
A bit ahead of the United Airlines network.
UA 4974 arrived on time 86% of the time, versus 79% across the United Airlines network.
Trending in the right direction.
UA 4974 arrived on time 90% of the time over the last three months in the data, compared with 75% in the three months before that.
The breakdown
- Mon87%(39 flights)
- Tue85%(47 flights)
- Wed92%(48 flights)
- Thu82%(45 flights)
- Fri83%(48 flights)
- Sat84%(31 flights)
- Sun84%(38 flights)
- 9 AM–12 PM85%(290 flights)
- 12–3 PM—(6 flights)
96%
May
Jun 79% → May 96% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 79% | 24 |
| July 2025 | 90% | 19 |
| August 2025 | 82% | 17 |
| September 2025 | 97% | 29 |
| October 2025 | 93% | 27 |
| November 2025 | 93% | 15 |
| December 2025 | 63% | 27 |
| January 2026 | 71% | 28 |
| February 2026 | 92% | 25 |
| March 2026 | 81% | 31 |
| April 2026 | 93% | 30 |
| May 2026 | 96% | 24 |
- Departures on time
- 87%
- Diverted
- 0%
- Flights flown
- 296
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 299 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.