UA1821
UA1821 (United Airlines) is a multi-stop service on 7 routes, busiest New Orleans to Houston. Of 959 departures recorded from October 2024 to July 2026, 89.1% left on time, according to the US BTS.
- On-time departures89.1%of 959 flights
- Average delay4.3 min
- July 202631▲ 0.0%vs July 2025
- Cancelled2.1%
- Legs flown under this number7
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 37 | 67 | ▲ 81.1% |
| February | 28 | 55 | ▲ 96.4% |
| March | 31 | 35 | ▲ 12.9% |
| April | 30 | 30 | 0.0% |
| May | 36 | 31 | ▼ 13.9% |
| June | 44 | 30 | ▼ 31.8% |
| July | 31 | 31 | 0.0% |
| August | 59 | – | – |
| September | 60 | – | – |
| October | 68 | – | in progress |
| November | 82 | – | – |
| December | 61 | – | – |
| Year to date (Jan–Jul) | 237 | 279 | ▲ 17.7% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 94.1% | 98.4% | ▲ 4.6% |
| February | 100.0% | 92.7% | ▼ 7.3% |
| March | 100.0% | 91.4% | ▼ 8.6% |
| April | 90.0% | 96.6% | ▲ 7.3% |
| May | 91.4% | 72.4% | ▼ 20.8% |
| June | 81.8% | 76.7% | ▼ 6.3% |
| July | 100.0% | 70.4% | ▼ 29.6% |
| August | 91.4% | – | – |
| September | 95.0% | – | – |
| October | 86.8% | – | in progress |
| November | 86.3% | – | – |
| December | 83.3% | – | – |
| Year-to-date average (Jan–Jul) | 93.9% | 85.5% | ▼ 8.9% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 3 | 3 | 0.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 1 | – |
| May | 1 | 2 | ▲ 100.0% |
| June | 0 | 0 | – |
| July | 1 | 4 | ▲ 300.0% |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 5 | 10 | ▲ 100.0% |
according to the US BTS · October 2024 → 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 97.9% 939
- Cancelled 2.1% 20
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| MSY IAH Louis Armstrong New Orleans International Airport – George Bush Intercontinental Airport | 489 | -1.2 min | 95.2% | 403 |
| IAH RDU George Bush Intercontinental Airport – Raleigh-Durham International Airport | 1,675 | 1.2 min | 92.8% | 308 |
| ORD LGA Chicago O'Hare International Airport – LaGuardia Airport | 1,177 | 12.4 min | 73.3% | 93 |
| IAH DTW George Bush Intercontinental Airport – Detroit Metropolitan Wayne County Airport | 1,731 | 10.5 min | 84.9% | 86 |
| RDU EWR Raleigh-Durham International Airport – Newark Liberty International Airport | 670 | 40.3 min | 52.2% | 49 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 80.0% | 0 |
| November 2024 | 48 | 48 | 87.5% | 0 |
| December 2024 | 45 | 44 | 86.4% | 1 |
| January 2025 | 37 | 34 | 94.1% | 3 |
| February 2025 | 28 | 28 | 100.0% | 0 |
| March 2025 | 31 | 31 | 100.0% | 0 |
| April 2025 | 30 | 30 | 90.0% | 0 |
| May 2025 | 36 | 35 | 91.4% | 1 |
| June 2025 | 44 | 44 | 81.8% | 0 |
| July 2025 | 31 | 30 | 100.0% | 1 |
| August 2025 | 59 | 58 | 91.4% | 1 |
| September 2025 | 60 | 60 | 95.0% | 0 |
| October 2025 | 68 | 68 | 86.8% | 0 |
| November 2025 | 82 | 80 | 86.3% | 2 |
| December 2025 | 61 | 60 | 83.3% | 1 |
| January 2026 | 67 | 64 | 98.4% | 3 |
| February 2026 | 55 | 55 | 92.7% | 0 |
| March 2026 | 35 | 35 | 91.4% | 0 |
| April 2026 | 30 | 29 | 96.6% | 1 |
| May 2026 | 31 | 29 | 72.4% | 2 |
| June 2026 | 30 | 30 | 76.7% | 0 |
| July 2026 | 31 | 27 | 70.4% | 4 |