Flight profile · Delta Air Lines
DL1186
Tulsa (TUL) to Atlanta (ATL) · scheduled 4:28 PM – 7:30 PM
How DL1186 performs
536 operations, 2024-06-07 to 2026-06-30.
DL1186 arrived on time 82.6% of the time, against 87.7% for all TUL → ATL flights — this specific departure is 5.1 percentage points worse than the route as a whole. Against Delta Air Lines’s own flights on this route it is 5.0 points worse.
Source: US DOT Bureau of Transportation Statistics · 536 operations between 2024-06-07 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL1186 | 82.6% | 1.68% | -17 min | 9.0% | 536 |
| Delta Air Lines on TUL → ATL | 87.6% | 1.63% | -15 min | 5.5% | 4,363 |
| All TUL → ATL flights | 87.7% | 1.52% | -15 min | 5.2% | 4,679 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-06-07 to 2026-06-30
Other routes DL1186 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 |
|---|---|---|---|
| ATL→TUL Atlanta to Tulsa | 2024-06-07 – 2026-06-30 | 432 | 82.7% |
| ATL→PHL Atlanta to Philadelphia | 2026-05-07 – 2026-06-06 | 31 | — |
| MSP→RSW Minneapolis to Fort Myers | 2026-03-08 – 2026-04-12 | 36 | — |
| LGA→JAX New York to Jacksonville | 2024-12-21 – 2026-01-03 | 26 | — |
| IAH→ATL Houston to Atlanta | 2025-01-06 – 2025-03-08 | 62 | — |
| MSP→BOS Minneapolis to Boston | 2023-07-01 – 2024-06-06 | 228 | 77.9% |
| LGA→ATL New York to Atlanta | 2024-04-09 – 2024-05-06 | 28 | — |
| LAX→MSP Los Angeles to Minneapolis | 2024-01-08 – 2024-03-09 | 62 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1186 currently operates. Blending them would produce an average of two different flights.
Why DL1186 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
weather severe enough to stop this flight specifically
airspace and airport capacity, including weather-driven flow control
Share of the delay minutes US DOT attributed to each cause for DL1186 on TUL → ATL. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Other departures on TUL → ATL
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL1259 | Delta Air Lines | 90.4% | 14 min early | 738 |
| DL1539 | Delta Air Lines | 82.4% | 11 min early | 631 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 536 records of DL1186 operating TUL → ATL, 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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