DL603
DL603 (Delta Air Lines) is a multi-stop service on 4 routes, busiest Houston to New York. Of 187 departures recorded from June 2025 to January 2026, 60.3% left on time, according to the US BTS.
- On-time departures60.3%of 187 flights
- Average delay40.3 min
- January 20262
- Cancelled1.6%
- Legs flown under this number4
Recorded departures by month
Short series — DL603 has only 8 months so far. Enough to show the level now, not enough to read a trend.
All legs under this number combined; see the leg table.
The most recent periods8 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 2 | – |
| February | – | – | – |
| March | – | – | – |
| April | – | – | – |
| May | – | – | – |
| June | 23 | – | – |
| July | 28 | – | – |
| August | 26 | – | – |
| September | 26 | – | – |
| October | 27 | – | in progress |
| November | 24 | – | – |
| December | 31 | – | – |
according to the US BTS · June 2025 → January 2026
On-time departures by month
Short series — DL603 has only 8 months so far. Enough to show the level now, not enough to read a trend.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods8 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 100.0% | – |
| February | – | – | – |
| March | – | – | – |
| April | – | – | – |
| May | – | – | – |
| June | 43.5% | – | – |
| July | 63.0% | – | – |
| August | 76.9% | – | – |
| September | 84.6% | – | – |
| October | 65.4% | – | in progress |
| November | 41.7% | – | – |
| December | 43.3% | – | – |
according to the US BTS · June 2025 → January 2026
Average departure delay by month
Short series — DL603 has only 8 months so far. Enough to show the level now, not enough to read a trend.
according to the US BTS · June 2025 → January 2026
Cancelled departures by month
Short series — DL603 has only 8 months so far. Enough to show the level now, not enough to read a trend.
The most recent periods8 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 0 | – |
| February | – | – | – |
| March | – | – | – |
| April | – | – | – |
| May | – | – | – |
| June | 0 | – | – |
| July | 1 | – | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
according to the US BTS · June 2025 → January 2026
This is a historical record of departures already flown, not a forecast for your flight.
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 98.4% 184
- Cancelled 1.6% 3
Share of all recorded flights in the period, all legs. · Jun 8, 2025 → Jan 4, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| IAH LGA George Bush Intercontinental Airport – LaGuardia Airport | 2,277 | 44.2 min | 60.4% | 167 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| June 2025 | 23 | 23 | 43.5% | 0 |
| July 2025 | 28 | 27 | 63.0% | 1 |
| August 2025 | 26 | 26 | 76.9% | 0 |
| September 2025 | 26 | 26 | 84.6% | 0 |
| October 2025 | 27 | 26 | 65.4% | 1 |
| November 2025 | 24 | 24 | 41.7% | 0 |
| December 2025 | 31 | 30 | 43.3% | 1 |
| January 2026 | 2 | 2 | 100.0% | 0 |