Flight OddsUA421 SNA → DEN
United Airlines · Santa Ana, CA to Denver, CO · 187 flights observed, 2025-10-26 to 2026-05-20 · 846 mi
UA421 covers more than one route in the data window — the stats below are for SNA → DEN, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
88%
Median delay
-11 min
90th percentile
+23 min
Cancellation rate
1%
How often is UA421 on time?
Across 187 flights on SNA → DEN from 2025-10-26 to 2026-05-20, UA421 arrived within 15 minutes of schedule 88% of the time. The median arrival delay was -11 min, and the worst 10% of flights arrived +23 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 163 | 88% |
| 16-30 min | 7 | 4% |
| 31-60 min | 6 | 3% |
| 61-120 min | 7 | 4% |
| 2+ hrs | 3 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 6 | 100% | -8 min |
| 2025-11 | 29 | 90% | -2 min |
| 2025-12 | 17 | 82% | +5 min |
| 2026-01 | 26 | 85% | +0 min |
| 2026-02 | 27 | 81% | +6 min |
| 2026-03 | 31 | 84% | +2 min |
| 2026-04 | 30 | 97% | -16 min |
| 2026-05 | 20 | 90% | -3 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 27 | 89% |
| Tue | 27 | 89% |
| Wed | 28 | 89% |
| Thu | 25 | 80% |
| Fri | 26 | 88% |
| Sat | 26 | 88% |
| Sun | 27 | 89% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…