Flight OddsUnited Airlines · Raleigh/Durham, NC to San Francisco, CA · 30 flights observed, 2026-05-21 to 2026-06-24 · 2,400 mi
UA540 covers more than one route in the data window — the stats below are for RDU → SFO, the one it has flown most recently. The others are linked under “Other routes”.
How often is UA540 on time?
Across 30 flights on RDU → SFO from 2026-05-21 to 2026-06-24, UA540 arrived within 15 minutes of schedule 86% of the time. The median arrival delay was -4 min, and the worst 10% of flights arrived +36 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 25 | 86% |
| 16-30 min | 1 | 3% |
| 31-60 min | 0 | 0% |
| 61-120 min | 2 | 7% |
| 2+ hrs | 1 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-05 | 10 | 90% | -6 min |
| 2026-06 | 19 | 84% | +18 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 100% |
| Tue | No data | — |
| Wed | 4 | 100% |
| Thu | 5 | 80% |
| Fri | 5 | 60% |
| Sat | 5 | 100% |
| Sun | 5 | 80% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…