UA1634

Between its first and last recorded date on DFW → ORD, UA1634 averaged about 5 operations a week (875 in 1,158 days, cancelled ones included).

UA1634 arrived on time 84.4% of the time, against 72.7% for all DFW → ORD flights, so this departure is 11.7 percentage points better than the route as a whole. Against United Airlines’ own flights on this route it is 7.9 points better.

Source: US DOT Bureau of Transportation Statistics · 875 operations, July 2023 – August 2026 · If UA1634 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.

This flight runs unusually far ahead of the DFW → ORD route as a whole, better than 93% of 12,358 comparable flight numbers.

84.4% on time for this specific departure, against 72.7% for every DFW → ORD flight.

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026 · The one thing about this specific departure that ranks most extreme against every other published flight number, out of everything FlyerIntel checks — shown only when something clears a real statistical bar, not for every flight.

UA1634 cancelled 14 of 875 operations (1.60%), close to the 2.00% for DFW → ORD.

6.8% of UA1634’s arrivals were an hour or more late, against 10.9% across DFW → ORD, so the long delays are less common on this number than on the route.

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026

Share of the delay minutes US DOT attributed to each cause for UA1634 on DFW → ORD. Only delays of 15 minutes or more are attributed. What the five causes mean

Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – August 2026

The aircraft flying UA1634 came in 15 or more minutes late on 13% of the departures where its previous flight is known. There are not enough departures in both groups to say how the flight left after a late one and after an on-time one.

Matched by tail number to the aircraft’s previous flight into DFW: 787 of 863 departures. Unknown, cancelled or diverted inbounds and gaps over 12 hours are left out.

Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – August 2026

UA1634 pushes back an average of 7.7 minutes late and reaches the gate at ORD an average of 4.2 minutes late. The 3.4 minutes between those two figures are slack the published schedule already carries, so a late pushback is partly, not fully, made up before the gate. Its 21.3 minutes on the taxiways at DFW is about what any departure from the airport in that hour spends.

On arrival at ORD, UA1634 spends 14.9 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 3.1 minutes shorter than a typical ORD arrival (18.0 min).

Taxi-out is gate to wheels up and sits inside the scheduled block; the hourly comparison is 83,099 DFW departures. Taxi-in is landing to gate, set against 985,848 arrivals at ORD. More on taxi time.

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026

UA1634 is scheduled out of DFW at 10:39 AM, in the 10 AM–11 AM bank. Departures from DFW in that hour arrive on time 80.5% of the time against 73.1% across the airport’s whole day — the slot alone is worth 7.4 points better before anything about this particular flight is considered.

Both airport figures cover every destination from DFW, so they describe the slot, not this journey; the route comparison is above. Why the hour matters.

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026 · Hours below 120 departures are not scored.

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026 · Days with fewer than 120 operations are not scored.

The figures above describe only DFW → ORD, the route UA1634 flies now.

Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – August 2026

Among all 5 departures on this route with at least 600 operations, UA1634 has the 2nd highest on-time rate, 1.5 points behind the best. Every departure here has at least 600 operations; the other rows are the most punctual on the route, not all of them.

• AA328 DFW→ORD American Airlines on the same route, departs 8:35 AM, on time 83.5%
• AA2346 DFW→ORD American Airlines on the same route, departs 8:59 PM, on time 66.3%
• UA2290 ORD→DFW Return trip, ORD to DFW, departs 12:45 PM, on time 74.7%
• UA1310 LGA→ORD United Airlines flight into ORD, LGA to ORD, departs 10:25 AM, on time 86.1%