Flight OddsWN4257 SFO → DEN
Southwest Airlines · San Francisco, CA to Denver, CO · 50 flights observed, 2026-01-06 to 2026-03-04 · 967 mi
WN4257 covers more than one route in the data window — the stats below are for SFO → DEN, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
66%
Median delay
+6 min
90th percentile
+47 min
Cancellation rate
0%
How often is WN4257 on time?
Across 50 flights on SFO → DEN from 2026-01-06 to 2026-03-04, WN4257 arrived within 15 minutes of schedule 66% of the time. The median arrival delay was +6 min, and the worst 10% of flights arrived +47 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 | 33 | 66% |
| 16-30 min | 8 | 16% |
| 31-60 min | 6 | 12% |
| 61-120 min | 3 | 6% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 22 | 91% | +2 min |
| 2026-02 | 24 | 42% | +27 min |
| 2026-03 | 4 | 75% | +6 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 88% |
| Tue | 9 | 67% |
| Wed | 9 | 56% |
| Thu | 8 | 63% |
| Fri | 8 | 63% |
| Sat | No data | — |
| Sun | 8 | 63% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…