DL631
DL631 (Delta Air Lines) is a multi-stop service on 6 routes, busiest Chicago to Minneapolis. Of 277 departures recorded from August 2025 to July 2026, 73.0% left on time, according to the US BTS.
- On-time departures73.0%of 277 flights
- Average delay21.8 min
- July 20261
- Cancelled2.5%
- Legs flown under this number6
Recorded departures by month
Short series — DL631 has only 10 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.
Months without data are left blank.
The most recent periods10 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 29 | – |
| February | – | 27 | – |
| March | – | 55 | – |
| April | – | 24 | – |
| May | – | – | – |
| June | – | – | – |
| July | – | 1 | – |
| August | 21 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 28 | – | – |
| December | 31 | – | – |
according to the US BTS · August 2025 → July 2026
On-time departures by month
Short series — DL631 has only 10 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods10 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 75.0% | – |
| February | – | 65.4% | – |
| March | – | 81.8% | – |
| April | – | 100.0% | – |
| May | – | – | – |
| June | – | – | – |
| July | – | 100.0% | – |
| August | 47.6% | – | – |
| September | 72.4% | – | – |
| October | 71.0% | – | in progress |
| November | 64.3% | – | – |
| December | 66.7% | – | – |
according to the US BTS · August 2025 → July 2026
Average departure delay by month
Short series — DL631 has only 10 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
according to the US BTS · August 2025 → July 2026
Cancelled departures by month
Short series — DL631 has only 10 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
The most recent periods10 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 1 | – |
| February | – | 1 | – |
| March | – | 0 | – |
| April | – | 0 | – |
| May | – | – | – |
| June | – | – | – |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 1 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 4 | – | – |
according to the US BTS · August 2025 → July 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 97.5% 270
- Cancelled 2.5% 7
Share of all recorded flights in the period, all legs. · Aug 11, 2025 → Jul 4, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD MSP Chicago O'Hare International Airport – Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field | 537 | 30.8 min | 62.4% | 129 |
| DCA MSP Ronald Reagan Washington National Airport – Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field | 1,495 | 28.6 min | 68.4% | 59 |
| CHA ATL Chattanooga Metropolitan Airport (Lovell Field) – Hartsfield Jackson Atlanta International Airport | 171 | 7.2 min | 88.9% | 36 |
| ATL CHA Hartsfield Jackson Atlanta International Airport – Chattanooga Metropolitan Airport (Lovell Field) | 171 | 7.5 min | 88.9% | 36 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| August 2025 | 21 | 21 | 47.6% | 0 |
| September 2025 | 30 | 29 | 72.4% | 1 |
| October 2025 | 31 | 31 | 71.0% | 0 |
| November 2025 | 28 | 28 | 64.3% | 0 |
| December 2025 | 31 | 27 | 66.7% | 4 |
| January 2026 | 29 | 28 | 75.0% | 1 |
| February 2026 | 27 | 26 | 65.4% | 1 |
| March 2026 | 55 | 55 | 81.8% | 0 |
| April 2026 | 24 | 24 | 100.0% | 0 |
| July 2026 | 1 | 1 | 100.0% | 0 |