Flight profile · United Airlines
UA1240
Dallas–Fort Worth (DFW) to Washington (IAD) · scheduled 5:25 PM – 9:25 PM
How UA1240 performs
921 operations, 2023-07-01 to 2026-06-30.
Source: US DOT Bureau of Transportation Statistics · 921 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1240 | 77.3% | 1.41% | -4 min | 10.6% | 921 |
| 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 UA1240 run worse on particular days?
Tuesday is historically the most reliable day and Sunday the least, a gap of 10.2 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 UA1240 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 |
|---|---|---|---|
| SFO→EWR San Francisco to Newark | 2026-02-09 – 2026-02-09 | 1 | — |
| ORD→FCA Chicago to Kalispell | 2025-12-18 – 2026-01-05 | 19 | — |
| MSY→EWR New Orleans to Newark | 2024-12-19 – 2025-01-06 | 19 | — |
| SFO→DFW San Francisco to Dallas–Fort Worth | 2023-07-01 – 2024-10-25 | 282 | 78.2% |
| IAD→IAH Washington to Houston | 2024-05-22 – 2024-05-22 | 1 | — |
| DEN→FLL Denver to Fort Lauderdale | 2024-03-31 – 2024-05-19 | 6 | — |
| ORD→FAT Chicago to Fresno | 2024-05-01 – 2024-05-01 | 1 | — |
| ATL→DEN Atlanta to Denver | 2024-04-10 – 2024-04-14 | 2 | — |
| SEA→SFO Seattle to San Francisco | 2023-09-05 – 2024-02-14 | 160 | 72.3% |
| IAH→IAD Houston to Washington | 2023-07-03 – 2023-07-03 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1240 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 921 records of UA1240 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.