YX3551
YX3551 (Republic Airways) is a multi-stop service on 10 routes, busiest Chicago to Louisville. Of 526 departures recorded from March 2025 to July 2026, 79.4% left on time, according to the US BTS.
- On-time departures79.4%of 526 flights
- Average delay16.7 min
- July 202618▼ 55.0%vs July 2025
- Cancelled3.0%
- Legs flown under this number10
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 31 | – |
| February | – | 28 | – |
| March | 2 | 58 | ▲ 2,800.0% |
| April | 27 | 56 | ▲ 107.4% |
| May | 14 | 46 | ▲ 228.6% |
| June | 30 | 24 | ▼ 20.0% |
| July | 40 | 18 | ▼ 55.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
according to the US BTS · March 2025 → 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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 83.3% | – |
| February | – | 82.1% | – |
| March | 100.0% | 76.4% | ▼ 23.6% |
| April | 96.3% | 88.5% | ▼ 8.1% |
| May | 85.7% | 82.6% | ▼ 3.6% |
| June | 56.7% | 71.4% | ▲ 26.0% |
| July | 52.5% | 94.1% | ▲ 79.3% |
| August | 75.9% | – | – |
| September | 86.7% | – | – |
| October | 87.1% | – | in progress |
| November | 81.5% | – | – |
| December | 80.7% | – | – |
according to the US BTS · March 2025 → July 2026
Average departure delay by month
according to the US BTS · March 2025 → July 2026
Cancelled departures by month
The most recent periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 1 | – |
| February | – | 0 | – |
| March | 0 | 3 | – |
| April | 0 | 4 | – |
| May | 0 | 0 | – |
| June | 0 | 3 | – |
| July | 0 | 1 | – |
| August | 2 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 0 | – | – |
according to the US BTS · March 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 97.0% 510
- Cancelled 3.0% 16
Share of all recorded flights in the period, all legs. · Mar 30, 2025 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD SDF Chicago O'Hare International Airport – Louisville Muhammad Ali International Airport | 462 | 19.9 min | 77.4% | 358 |
| PWM ORD Portland International Jetport – Chicago O'Hare International Airport | 1,444 | 18.1 min | 84.6% | 56 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| March 2025 | 2 | 2 | 100.0% | 0 |
| April 2025 | 27 | 27 | 96.3% | 0 |
| May 2025 | 14 | 14 | 85.7% | 0 |
| June 2025 | 30 | 30 | 56.7% | 0 |
| July 2025 | 40 | 40 | 52.5% | 0 |
| August 2025 | 31 | 29 | 75.9% | 2 |
| September 2025 | 30 | 30 | 86.7% | 0 |
| October 2025 | 31 | 31 | 87.1% | 0 |
| November 2025 | 29 | 27 | 81.5% | 2 |
| December 2025 | 31 | 31 | 80.7% | 0 |
| January 2026 | 31 | 30 | 83.3% | 1 |
| February 2026 | 28 | 28 | 82.1% | 0 |
| March 2026 | 58 | 55 | 76.4% | 3 |
| April 2026 | 56 | 52 | 88.5% | 4 |
| May 2026 | 46 | 46 | 82.6% | 0 |
| June 2026 | 24 | 21 | 71.4% | 3 |
| July 2026 | 18 | 17 | 94.1% | 1 |