Flight OddsWN4520 BUR → DEN
Southwest Airlines · Burbank, CA to Denver, CO · 46 flights observed, 2025-11-02 to 2026-01-05 · 850 mi
WN4520 covers more than one route in the data window — the stats below are for BUR → DEN, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
78%
Median delay
-3 min
90th percentile
+68 min
Cancellation rate
0%
How often is WN4520 on time?
Across 46 flights on BUR → DEN from 2025-11-02 to 2026-01-05, WN4520 arrived within 15 minutes of schedule 78% of the time. The median arrival delay was -3 min, and the worst 10% of flights arrived +68 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 | 36 | 78% |
| 16-30 min | 1 | 2% |
| 31-60 min | 3 | 7% |
| 61-120 min | 4 | 9% |
| 2+ hrs | 2 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 24 | 75% | +22 min |
| 2025-12 | 20 | 80% | +12 min |
| 2026-01 | 2 | 100% | -14 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 7 | 86% |
| Tue | 6 | 67% |
| Wed | 8 | 63% |
| Thu | 8 | 88% |
| Fri | 6 | 83% |
| Sat | 4 | 100% |
| Sun | 7 | 71% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…