Flight profile · United Airlines
UA2639
Dallas–Fort Worth (DFW) to Washington (IAD) · scheduled 7:30 AM – 11:32 AM
How UA2639 performs
961 operations, 2023-07-01 to 2026-06-30.
UA2639 arrived on time 88.8% of the time, against 77.4% for all DFW → IAD flights — this specific departure is 11.5 percentage points better than the route as a whole. Against United Airlines’s own flights on this route it is 6.0 points better.
Source: US DOT Bureau of Transportation Statistics · 961 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA2639 | 88.8% | 1.14% | -8 min | 4.5% | 961 |
| United Airlines on DFW → IAD | 82.8% | 1.25% | -6 min | 7.2% | 2,880 |
| All DFW → IAD flights | 77.4% | 1.76% | -4 min | 8.8% | 5,443 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does UA2639 run worse on particular days?
Sunday is historically the most reliable day and Friday the least, a gap of 4.3 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes UA2639 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| IAD→FLL Washington to Fort Lauderdale | 2026-01-08 – 2026-05-20 | 123 | 86.0% |
| LAS→EWR Las Vegas to Newark | 2025-10-07 – 2025-10-07 | 1 | — |
| LAX→IAD Los Angeles to Washington | 2025-08-21 – 2025-08-21 | 1 | — |
| ROC→EWR Rochester to Newark | 2025-05-22 – 2025-05-22 | 1 | — |
| IAD→EWR Washington to Newark | 2025-04-15 – 2025-04-30 | 12 | — |
| BZN→DEN Bozeman to Denver | 2025-04-13 – 2025-04-27 | 3 | — |
| DEN→RSW Denver to Fort Myers | 2025-03-30 – 2025-03-30 | 1 | — |
| SFO→BOS San Francisco to Boston | 2025-02-12 – 2025-02-12 | 1 | — |
| MCI→MSY Kansas City to New Orleans | 2025-02-07 – 2025-02-07 | 1 | — |
| LAX→LAS Los Angeles to Las Vegas | 2025-01-06 – 2025-01-06 | 1 | — |
| MSN→ORD Madison to Chicago | 2024-08-20 – 2024-08-24 | 3 | — |
| IAD→JAX Washington to Jacksonville | 2024-03-07 – 2024-03-30 | 24 | — |
| LGA→IAH New York to Houston | 2023-12-21 – 2024-01-08 | 19 | — |
Because the same number has served different journeys, the statistics above describe only the route UA2639 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 961 records of UA2639 operating DFW → IAD, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.