Flight Reliability
UA 6157 · United Airlines
Washington → Kansas City (IAD–MCI)96% of its flights flew this route. The rest (IAH–JAX, IND–IAD) are included in these numbers.
- 82%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 1.4%
- Cancelled
- 7 min early
- Median arrival delay
Based on 357 historical flights. Data through May 2026.
What the data says
Thursdays have been rough.
UA 6157 arrived on time 90% of the time on Sundays and just 75% on Thursdays. That gap is worth planning around.
A bit ahead of the IAD–MCI route.
UA 6157 arrived on time 82% of the time, versus 78% across the IAD–MCI route.
A bit ahead of the United Airlines network.
UA 6157 arrived on time 82% of the time, versus 79% across the United Airlines network.
Trending in the right direction.
UA 6157 arrived on time 87% of the time over the last three months in the data, compared with 79% in the three months before that.
The breakdown
- Mon88%(51 flights)
- Tue80%(44 flights)
- Wed84%(50 flights)
- Thu75%(52 flights)
- Fri78%(51 flights)
- Sat81%(52 flights)
- Sun90%(51 flights)
- 9 AM–12 PM—(2 flights)
- 12–3 PM82%(338 flights)
- 3–6 PM82%(11 flights)
Jun 61% → May 84% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 61% | 28 |
| July 2025 | 77% | 30 |
| August 2025 | 89% | 27 |
| September 2025 | 77% | 26 |
| October 2025 | 94% | 31 |
| November 2025 | 93% | 30 |
| December 2025 | 60% | 30 |
| January 2026 | 87% | 30 |
| February 2026 | 89% | 28 |
| March 2026 | 90% | 30 |
| April 2026 | 87% | 30 |
| May 2026 | 84% | 31 |
- Departures on time
- 83%
- Diverted
- 0.3%
- Flights flown
- 351
- 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.