Flight OddsUA520 PHX → ORD
United Airlines · Phoenix, AZ to Chicago, IL · 90 flights observed, 2025-08-19 to 2026-02-11 · 1,440 mi
UA520 covers more than one route in the data window — the stats below are for PHX → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
81%
Median delay
0 min
90th percentile
+30 min
Cancellation rate
0%
How often is UA520 on time?
Across 90 flights on PHX → ORD from 2025-08-19 to 2026-02-11, UA520 arrived within 15 minutes of schedule 81% of the time. The median arrival delay was 0 min, and the worst 10% of flights arrived +30 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 | 73 | 81% |
| 16-30 min | 8 | 9% |
| 31-60 min | 3 | 3% |
| 61-120 min | 4 | 4% |
| 2+ hrs | 2 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 13 | 100% | -7 min |
| 2025-09 | 24 | 96% | -4 min |
| 2025-12 | 16 | 56% | +22 min |
| 2026-01 | 26 | 73% | +23 min |
| 2026-02 | 11 | 82% | +1 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 12 | 75% |
| Tue | 15 | 73% |
| Wed | 15 | 87% |
| Thu | 12 | 83% |
| Fri | 12 | 92% |
| Sat | 12 | 75% |
| Sun | 12 | 83% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…