UA1634
United Airlines flight 1634 — Dallas (DFW) to Chicago (ORD)
On time
79%
Avg delay
~71 min
Cancelled
1.2%
UA1634 is fairly reliable, though delays happen. About 79% of departures arrive on time. When delays happen, the most common cause is late-arriving aircraft.
Monthly breakdown
| Month | On time | Cancelled | Avg delay |
|---|---|---|---|
| 2026-07 | 70% | 0.0% | 140 min |
| 2026-06 | 67% | 0.0% | 117 min |
| 2026-06 | 100% | 0.0% | 0 min |
| 2026-05 | 82% | 0.0% | 60 min |
| 2026-05 | 80% | 0.0% | 30 min |
| 2026-04 | 85% | 0.0% | 124 min |
| 2026-04 | 76% | 0.0% | 127 min |
| 2026-03 | 71% | 0.0% | 107 min |
| 2026-03 | 67% | 0.0% | 215 min |
| 2026-03 | 78% | 4.2% | 143 min |
| 2026-02 | 86% | 0.0% | 58 min |
| 2026-02 | 82% | 0.0% | 82 min |
Top delay cause
late-arriving aircraft
Based on 1,977 tracked departures
Flying UA1634? Get a free briefing.
Weather, delays, and what to expect — sent to your inbox before your flight.
Get a free briefingData last updated October 2026. Source: Bureau of Transportation Statistics.