Flight profile · Delta Air Lines
DL2138
Atlanta (ATL) to Portland (PWM) · scheduled 7:20 PM – 10:00 PM
How DL2138 performs
940 operations, 2023-07-01 to 2026-06-30.
Source: US DOT Bureau of Transportation Statistics · 940 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL2138 | 79.0% | 1.38% | -4 min | 6.5% | 940 |
| Delta Air Lines on ATL → PWM | 79.7% | 1.04% | -4 min | 5.4% | 1,723 |
| All ATL → PWM flights | 79.7% | 1.04% | -4 min | 5.4% | 1,723 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does DL2138 run worse on particular days?
Tuesday is historically the most reliable day and Sunday the least, a gap of 17.4 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 DL2138 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.
Because the same number has served different journeys, the statistics above describe only the route DL2138 currently operates. Blending them would produce an average of two different flights.
Why DL2138 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding, fuelling — within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for DL2138 on ATL → PWM. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Data and methodology
Calculated by FlyerIntel from 940 records of DL2138 operating ATL → PWM, 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.
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