Flight profile · Delta Air Lines
DL343
Washington (DCA) to Atlanta (ATL) · scheduled 7:59 AM – 9:52 AM
How DL343 performs
917 operations, 2023-09-05 to 2026-06-30.
DL343 arrived on time 86.2% of the time, against 80.6% for all DCA → ATL flights — this specific departure is 5.7 percentage points better than the route as a whole. Against Delta Air Lines’s own flights on this route it is 4.2 points better.
Source: US DOT Bureau of Transportation Statistics · 917 operations between 2023-09-05 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL343 | 86.2% | 2.62% | -11 min | 6.1% | 917 |
| Delta Air Lines on DCA → ATL | 82.0% | 1.86% | -10 min | 7.4% | 11,479 |
| All DCA → ATL flights | 80.6% | 2.33% | -9 min | 7.6% | 20,602 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-09-05 to 2026-06-30
By day of week
Does DL343 run worse on particular days?
Saturday is historically the most reliable day and Friday the least, a gap of 5.1 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-09-05 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes DL343 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 |
|---|---|---|---|
| IAH→LGA Houston to New York | 2025-12-20 – 2026-01-04 | 12 | — |
| BOS→RDU Boston to Raleigh–Durham | 2025-12-24 – 2026-01-01 | 4 | — |
| SAT→DTW San Antonio to Detroit | 2025-08-13 – 2025-08-13 | 1 | — |
| SLC→JFK Salt Lake City to New York | 2024-12-21 – 2025-01-04 | 15 | — |
| LGA→IAH New York to Houston | 2024-05-11 – 2024-06-01 | 4 | — |
| SLC→BOS Salt Lake City to Boston | 2024-02-17 – 2024-03-09 | 4 | — |
| ATL→LAS Atlanta to Las Vegas | 2024-01-13 – 2024-01-13 | 1 | — |
| CVG→DTW Cincinnati / Covington to Detroit | 2023-12-16 – 2024-01-07 | 23 | — |
| JFK→PDX New York to Portland | 2023-07-01 – 2023-09-04 | 51 | — |
Because the same number has served different journeys, the statistics above describe only the route DL343 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 917 records of DL343 operating DCA → 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.