Flight OddsUA635 IAD → SFO
United Airlines · Washington, DC to San Francisco, CA · 73 flights observed, 2026-04-04 to 2026-06-24 · 2,418 mi
UA635 covers more than one route in the data window — the stats below are for IAD → SFO, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
84%
Median delay
-8 min
90th percentile
+25 min
Cancellation rate
0%
How often is UA635 on time?
Across 73 flights on IAD → SFO from 2026-04-04 to 2026-06-24, UA635 arrived within 15 minutes of schedule 84% of the time. The median arrival delay was -8 min, and the worst 10% of flights arrived +25 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 | 61 | 84% |
| 16-30 min | 5 | 7% |
| 31-60 min | 4 | 5% |
| 61-120 min | 1 | 1% |
| 2+ hrs | 2 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 18 | 89% | -3 min |
| 2026-05 | 31 | 84% | 0 min |
| 2026-06 | 24 | 79% | +1 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 12 | 75% |
| Tue | 8 | 88% |
| Wed | 8 | 100% |
| Thu | 11 | 55% |
| Fri | 11 | 82% |
| Sat | 12 | 100% |
| Sun | 11 | 91% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…