UA1803
UA1803 (United Airlines) is a multi-stop service on 11 routes, busiest Chicago to Denver. Of 1,212 departures recorded from October 2024 to July 2026, 87.4% left on time, according to the US BTS.
- On-time departures87.4%of 1,212 flights
- Average delay8.0 min
- July 202631▼ 48.3%vs July 2025
- Cancelled0.8%
- Legs flown under this number11
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 43 | 88 | ▲ 104.7% |
| February | 28 | 83 | ▲ 196.4% |
| March | 31 | 66 | ▲ 112.9% |
| April | 30 | 60 | ▲ 100.0% |
| May | 52 | 72 | ▲ 38.5% |
| June | 35 | 84 | ▲ 140.0% |
| July | 60 | 31 | ▼ 48.3% |
| August | 51 | – | – |
| September | 81 | – | – |
| October | 61 | – | in progress |
| November | 59 | – | – |
| December | 60 | – | – |
| Year to date (Jan–Jul) | 279 | 484 | ▲ 73.5% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 83.3% | 88.5% | ▲ 6.2% |
| February | 78.6% | 81.7% | ▲ 4.0% |
| March | 83.9% | 81.5% | ▼ 2.8% |
| April | 80.0% | 94.8% | ▲ 18.5% |
| May | 84.6% | 93.1% | ▲ 10.0% |
| June | 91.4% | 88.0% | ▼ 3.8% |
| July | 83.3% | 90.3% | ▲ 8.4% |
| August | 88.2% | – | – |
| September | 90.1% | – | – |
| October | 95.1% | – | in progress |
| November | 89.8% | – | – |
| December | 86.7% | – | – |
| Year-to-date average (Jan–Jul) | 83.6% | 88.3% | ▲ 5.6% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 1 | 0.0% |
| February | 0 | 1 | – |
| March | 0 | 1 | – |
| April | 0 | 2 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 6 | ▲ 500.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.2% 1,202
- Cancelled 0.8% 10
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
88 of 8
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD DEN Chicago O'Hare International Airport – Denver International Airport | 1,426 | 8.9 min | 84.7% | 606 |
| PIT ORD Pittsburgh International Airport – Chicago O'Hare International Airport | 662 | 4.8 min | 94.1% | 242 |
| RDU ORD Raleigh-Durham International Airport – Chicago O'Hare International Airport | 1,039 | -2.8 min | 96.4% | 111 |
| DEN HDN Denver International Airport – Yampa Valley Airport | 227 | 14.0 min | 77.2% | 58 |
| ORD DSM Chicago O'Hare International Airport – Des Moines International Airport | 480 | 14.8 min | 91.9% | 37 |
| DEN COS Denver International Airport – City of Colorado Springs Municipal Airport | 117 | 23.4 min | 70.6% | 35 |
| DEN SJC Denver International Airport – Mineta San Jose International Airport | 1,522 | 37.7 min | 79.4% | 34 |
| DEN LAS Denver International Airport – Harry Reid International Airport | 1,009 | -1.2 min | 91.2% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 35 | 35 | 88.6% | 0 |
| November 2024 | 30 | 29 | 86.2% | 1 |
| December 2024 | 72 | 70 | 85.7% | 2 |
| January 2025 | 43 | 42 | 83.3% | 1 |
| February 2025 | 28 | 28 | 78.6% | 0 |
| March 2025 | 31 | 31 | 83.9% | 0 |
| April 2025 | 30 | 30 | 80.0% | 0 |
| May 2025 | 52 | 52 | 84.6% | 0 |
| June 2025 | 35 | 35 | 91.4% | 0 |
| July 2025 | 60 | 60 | 83.3% | 0 |
| August 2025 | 51 | 51 | 88.2% | 0 |
| September 2025 | 81 | 81 | 90.1% | 0 |
| October 2025 | 61 | 61 | 95.1% | 0 |
| November 2025 | 59 | 59 | 89.8% | 0 |
| December 2025 | 60 | 60 | 86.7% | 0 |
| January 2026 | 88 | 87 | 88.5% | 1 |
| February 2026 | 83 | 82 | 81.7% | 1 |
| March 2026 | 66 | 65 | 81.5% | 1 |
| April 2026 | 60 | 58 | 94.8% | 2 |
| May 2026 | 72 | 72 | 93.1% | 0 |
| June 2026 | 84 | 83 | 88.0% | 1 |
| July 2026 | 31 | 31 | 90.3% | 0 |