UA1878
This is a historical record of departures already flown, not a forecast for your flight.
88.8%
UA1878, operated by United Airlines, flies 17 different airport pairs — it is a multi-leg service. Across all 1,079 recorded departures, 88.8% left on time; the legs differ and are listed below.
Because this number covers several legs, the headline figure is an average across all of them. Read the leg table for the one you are flying.
These charts combine all legs flown under this number. Changes in the mix of legs can affect the monthly figures; consult the leg table below.
On-time departures by month
On time means departing no more than 15 minutes after schedule. Monthly punctuality uses only non-cancelled flights with a recorded departure delay; flights with missing times are excluded. Each month reflects the records available from the source.
according to us_bts_otp · 2024-09 → 2026-06
Recorded departures by month
according to us_bts_otp · 2024-09 → 2026-06
Cancellation share
- Not cancelled 99.3% 1,071
- Cancelled 0.7% 8
Share of all recorded flights over the period shown, including every leg. Not cancelled does not necessarily mean on time.
according to us_bts_otp · 2024-09-01 → 2026-06-30
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| September 2024 | 64 | 64 | 85.9% | 0 |
| October 2024 | 84 | 84 | 92.9% | 0 |
| November 2024 | 54 | 54 | 85.2% | 0 |
| December 2024 | 46 | 46 | 82.6% | 0 |
| January 2025 | 54 | 54 | 83.3% | 0 |
| February 2025 | 36 | 36 | 72.2% | 0 |
| March 2025 | 59 | 59 | 84.8% | 0 |
| April 2025 | 86 | 85 | 95.3% | 1 |
| May 2025 | 60 | 60 | 90.0% | 0 |
| June 2025 | 52 | 52 | 86.5% | 0 |
| July 2025 | 52 | 52 | 86.5% | 0 |
| August 2025 | 53 | 53 | 90.6% | 0 |
| September 2025 | 30 | 30 | 100.0% | 0 |
| October 2025 | 22 | 22 | 95.5% | 0 |
| November 2025 | 24 | 24 | 87.5% | 0 |
| December 2025 | 37 | 37 | 94.6% | 0 |
| January 2026 | 45 | 41 | 87.8% | 4 |
| February 2026 | 50 | 50 | 94.0% | 0 |
| March 2026 | 34 | 33 | 97.0% | 1 |
| April 2026 | 41 | 40 | 87.5% | 1 |
| May 2026 | 66 | 66 | 83.3% | 0 |
| June 2026 | 30 | 29 | 96.6% | 1 |
Legs flown under this number
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| AUS ORD Austin Bergstrom International Airport – Chicago O'Hare International Airport | 1,574 | 2.6 min | 94.4% | 363 |
| ORD SFO Chicago O'Hare International Airport – San Francisco International Airport | 2,964 | 10.1 min | 84.1% | 352 |
| SFO LAS San Francisco International Airport – Harry Reid International Airport | 665 | 3.9 min | 89.5% | 57 |
| ORD CLE Chicago O'Hare International Airport – Cleveland Hopkins International Airport | 507 | 12.2 min | 77.4% | 53 |
| MSP ORD Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field – Chicago O'Hare International Airport | 537 | -5.7 min | 100.0% | 31 |
| GRR ORD Gerald R. Ford International Airport – Chicago O'Hare International Airport | 220 | 3.5 min | 87.1% | 31 |