Flight profile · Delta Air Lines
DL2921
Salt Lake City (SLC) to Seattle (SEA) · scheduled 1:25 PM – 2:45 PM
How DL2921 performs
342 operations, 2025-05-07 to 2026-06-30.
DL2921 arrived on time 85.3% of the time, against 81.0% for all SLC → SEA flights — this specific departure is 4.3 percentage points better than the route as a whole.
Source: US DOT Bureau of Transportation Statistics · 342 operations between 2025-05-07 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL2921 | 85.3% | 0.58% | -9 min | 4.1% | 342 |
| Delta Air Lines on SLC → SEA | 84.9% | 0.38% | -9 min | 3.7% | 6,615 |
| All SLC → SEA flights | 81.0% | 0.69% | -7 min | 4.1% | 11,934 |
Source: FlyerIntel analysis of US DOT BTS data · 2025-05-07 to 2026-06-30
Other routes DL2921 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 |
|---|---|---|---|
| BOS→RDU Boston to Raleigh–Durham | 2025-05-03 – 2025-05-03 | 1 | — |
| MSP→PHL Minneapolis to Philadelphia | 2024-06-07 – 2025-03-08 | 179 | 74.0% |
| JFK→DTW New York to Detroit | 2025-01-05 – 2025-01-05 | 1 | — |
| ORF→ATL Norfolk to Atlanta | 2024-12-24 – 2025-01-01 | 4 | — |
| SLC→SAN Salt Lake City to San Diego | 2023-07-01 – 2024-06-06 | 210 | 86.1% |
| LAS→SEA Las Vegas to Seattle | 2024-04-09 – 2024-05-06 | 28 | — |
Because the same number has served different journeys, the statistics above describe only the route DL2921 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 342 records of DL2921 operating SLC → SEA, 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.