Best time to fly out of Casper-Natrona (CPR)
The early-flight folk wisdom holds up at Casper-Natrona: departures in the Before 6am band left on time 92.6% of the time, against 70.3% in the 2–4pm band. These are historical odds, not forecasts. The records say what happened on this schedule over three years; they know nothing about tomorrow’s thunderstorm.
Data through June 2026 · Bureau of Transportation Statistics
On-time rate by hour and day
On this page, “on time” means a departure that pushed back less than 15 minutes behind its scheduled time — the Bureau of Transportation Statistics definition, and the one airlines are held to.
| Departure time | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| Before 6am | 91 | 94 | 95 | 94 | 86 | 95 | 94 |
| 6–8am | 87 | 92 | 91 | 89 | 85 | 85 | 86 |
| 8–10am | – | – | – | – | – | – | – |
| 10am–12pm | 84 | 86 | 82 | 79 | 78 | 86 | 79 |
| 12–2pm | 80 | 81 | 85 | 82 | 87 | 81 | 79 |
| 2–4pm | 66 | 75 | 72 | 70 | 73 | 62 | 74 |
| 4–6pm | – | – | – | – | – | – | – |
| 6–8pm | – | – | – | – | – | – | – |
| 8–10pm | – | – | – | – | – | – | – |
| 10pm–12am | – | – | – | – | – | – | – |
The steadiest stretch at CPR was Before 6am — 92.6% of departures left on time across 1,072 flights. The weakest was 2–4pm at 70.3%.
The year at CPR
June was the hard month at CPR: 71.7% of departures left on time, across 657 flights. November was the easy one at 90.5%. Each month pools three years of that month, so a single bad week does not decide it.
| Month | Share departures that left on time | Flights |
|---|---|---|
| January | 83.7% | 467 |
| February | 82.2% | 391 |
| March | 85.6% | 432 |
| April | 83.5% | 419 |
| May | 78.9% | 524 |
| June | 71.7% | 657 |
| July | 79.9% | 577 |
| August | 78.8% | 603 |
| September | 88.6% | 516 |
| October | 89% | 495 |
| November | 90.5% | 450 |
| December | 86.5% | 499 |
Airlines at CPR
Every airline with at least 100 departures from CPR, busiest first. These are that airline’s departures from this airport only — its record across the country sits on its own page.
| Airline | Left on time | Typical delay | Cancelled | Departures |
|---|---|---|---|---|
| SkyWest Airlines | 82.7% | 93 min | 1% | 6,030 |
What delays out of CPR were put down to
Airlines file a reason with every arrival running 15 minutes late or more. Across 1,155 flights that departed CPR and ran 15 minutes late or more, the delay minutes break down with 43% put down to airline operations and 25.9% to late-arriving aircraft.
- Late-arriving aircraft 25.9%
- Airline operations 43%
- Air traffic & airport volume 18.4%
- Severe weather 12.6%
- Security 0%
Late-arriving aircraft is the knock-on category: the plane came in late, so it went out late again. It is why a 7am problem in Newark is still a problem in Denver at dinnertime, and why it is usually the biggest slice on the bar.
If you are connecting through CPR
Of 6,033 scheduled arrivals into CPR, 77.1% reached the gate less than 15 minutes behind schedule. Of the 1,304 arrivals that ran late, 49.4% were no more than 45 minutes behind — which is the difference between a tight connection and a new boarding pass.
Work out a specific layover — pick the airport and the minutes you have, and the tool reads the same arrival records back as a share.
Busiest routes out of CPR
Ranked by flights, with the share that arrived on time at the far end. Where a route carries enough flights for a page of its own the chip goes there; otherwise it goes to the destination airport.
CPR in one number
Casper-Natrona (CPR)
Rank 197 of 363 US airports by departures. Steadiest stretch of the day: Before 6am. Hardest month: June.
Questions about CPR
- What is the best time of day to fly out of Casper-Natrona?
- Before 6am. Departures in that band left on time 92.6% of the time across 1,072 flights, July 2023 through June 2026 — the best of the ten bands in the day. The 2–4pm band was the weakest at 70.3%.
- What is the worst month to fly out of CPR?
- June: 71.7% of the departures that flew left on time, with 657 scheduled. November was the other end of the year at 90.5%. Each figure pools three years of that calendar month.
- How often are flights cancelled at CPR?
- 1% of scheduled departures were cancelled over July 2023 through June 2026. Cancellations are counted against everything scheduled, not against everything that flew — a rate that looks small still adds up to real people in a rebooking line.