Flight profile · Delta Air Lines
DL2721
San Francisco (SFO) to Seattle (SEA) · scheduled 5:55 AM – 8:05 AM
How DL2721 performs
427 operations, 2025-04-14 to 2026-06-30.
DL2721 arrived on time 96.2% of the time, against 76.4% for all SFO → SEA flights — this specific departure is 19.8 percentage points better than the route as a whole. Against Delta Air Lines’s own flights on this route it is 10.0 points better.
Source: US DOT Bureau of Transportation Statistics · 427 operations between 2025-04-14 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL2721 | 96.2% | 0.94% | -21 min | 1.7% | 427 |
| Delta Air Lines on SFO → SEA | 86.2% | 1.02% | -17 min | 5.8% | 2,654 |
| All SFO → SEA flights | 76.4% | 1.17% | -6 min | 6.6% | 20,101 |
Source: FlyerIntel analysis of US DOT BTS data · 2025-04-14 to 2026-06-30
Other routes DL2721 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 |
|---|---|---|---|
| BNA→DTW Nashville to Detroit | 2024-12-19 – 2026-01-04 | 27 | — |
| ATL→MOB Atlanta to Mobile | 2024-11-29 – 2024-11-29 | 1 | — |
| MOB→ATL Mobile to Atlanta | 2024-11-29 – 2024-11-29 | 1 | — |
| FLL→LGA Fort Lauderdale to New York | 2024-07-08 – 2024-09-08 | 63 | — |
| LAS→SLC Las Vegas to Salt Lake City | 2024-06-07 – 2024-07-07 | 31 | — |
| GSP→ATL Greenville/Greer/Spartanburg to Atlanta | 2024-05-07 – 2024-06-06 | 29 | — |
| ATL→PBI Atlanta to West Palm Beach | 2024-04-09 – 2024-05-06 | 28 | — |
| PBI→ATL West Palm Beach to Atlanta | 2024-04-09 – 2024-05-06 | 28 | — |
| ATL→TLH Atlanta to Tallahassee | 2024-01-08 – 2024-04-08 | 84 | — |
| TLH→ATL Tallahassee to Atlanta | 2024-01-08 – 2024-04-08 | 84 | — |
| DTW→MCO Detroit to Orlando | 2024-01-20 – 2024-01-27 | 2 | — |
| MCO→DTW Orlando to Detroit | 2024-01-20 – 2024-01-27 | 2 | — |
| LAX→SLC Los Angeles to Salt Lake City | 2023-12-16 – 2024-01-07 | 23 | — |
| ATL→CMH Atlanta to Columbus | 2023-09-10 – 2023-12-15 | 58 | — |
| ATL→TPA Atlanta to Tampa | 2023-11-04 – 2023-11-04 | 1 | — |
| ORD→LGA Chicago to New York | 2023-10-09 – 2023-11-03 | 23 | — |
| ATL→DAY Atlanta to Dayton | 2023-07-01 – 2023-07-08 | 7 | — |
| DAY→ATL Dayton to Atlanta | 2023-07-01 – 2023-07-08 | 7 | — |
Because the same number has served different journeys, the statistics above describe only the route DL2721 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 427 records of DL2721 operating SFO → 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.