Best time to fly out of Yellowstone (COD)
Yellowstone did not fly enough departures in this window to split the day into time bands. Not enough flights to say. A percentage needs at least 100 flights behind it before it is worth printing; anything thinner is noise wearing a decimal point. 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 | – | – | – | – | – | – | – |
| 6–8am | – | – | – | – | – | – | – |
| 8–10am | – | – | – | – | – | – | – |
| 10am–12pm | – | – | – | – | – | – | – |
| 12–2pm | 70 | 72 | 77 | 58 | 75 | 70 | 70 |
| 2–4pm | – | – | – | – | – | – | – |
| 4–6pm | – | – | – | – | – | – | – |
| 6–8pm | – | – | – | – | – | – | – |
| 8–10pm | – | – | – | – | – | – | – |
| 10pm–12am | – | – | – | – | – | – | – |
Not enough flights to say — fewer than 100 in this window.
The year at COD
May was the hard month at COD: 68.4% of departures left on time, across 179 flights. October was the easy one at 86.3%. 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 | 73% | 124 |
| February | 71.2% | 112 |
| March | 79.8% | 124 |
| April | 76.7% | 120 |
| May | 68.4% | 179 |
| June | 69.4% | 299 |
| July | 74.3% | 244 |
| August | 70.5% | 236 |
| September | 73.4% | 192 |
| October | 86.3% | 124 |
| November | 81% | 119 |
| December | 81.3% | 124 |
Airlines at COD
Every airline with at least 100 departures from COD, 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 | 74.3% | 106 min | 1.6% | 1,997 |
What delays out of COD were put down to
Airlines file a reason with every arrival running 15 minutes late or more. Across 539 flights that departed COD and ran 15 minutes late or more, the delay minutes break down with 44.7% put down to airline operations and 26% to late-arriving aircraft.
- Late-arriving aircraft 26%
- Airline operations 44.7%
- Air traffic & airport volume 15.9%
- Severe weather 13.4%
- 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 COD
Of 2,000 scheduled arrivals into COD, 75.9% reached the gate less than 15 minutes behind schedule. Of the 422 arrivals that ran late, 46.9% 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 COD
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.
COD in one number
Yellowstone (COD)
Rank 279 of 363 US airports by departures. Steadiest stretch of the day: 12–2pm. Hardest month: May.
Questions about COD
- What is the worst month to fly out of COD?
- May: 68.4% of the departures that flew left on time, with 179 scheduled. October was the other end of the year at 86.3%. Each figure pools three years of that calendar month.
- How often are flights cancelled at COD?
- 1.6% 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.