Casper/Natrona County International in December 2025

80.6%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In December 2025, reporting carriers scheduled 217 domestic departures from Casper/Natrona County International (CPR). 80.6% left less than 15 minutes late and 80.2% reached their destination on time; 0.5% were cancelled.

Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so CPR departures were 8.6 points above the national departure figure.

A year earlier, in December 2024, the airport had 188 departures with 91.5% leaving on time: a change of −10.9 points, with flights up 15%.

Flights arriving at CPR that month were on time 73.7% of the time (217 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 46%, air carrier 30% and national aviation system 13%.

On time 80.2%
Arrived 15+ minutes late 18.9%
Cancelled 0.5%
Diverted 0.5%

Every scheduled departure from CPR in December 2025, judged by arrival at the destination.

December 2025 against a year earlier, the airport's year and the nation

Measure	Dec 2025	Dec 2024	CPR, 12 months to Jul 2026	All reported flights, Dec 2025
Departed on time	80.6%	91.5%	83.2%	72.0%
Arrived on time	80.2%	89.9%	82.1%	71.9%
Cancelled	0.5%	0.0%	0.8%	1.5%
Average departure delay (late minutes only)	17.5 min	7.0 min	16.7 min	21.2 min
Scheduled departures a day	7	6	7	19,410
Scheduled departures	217	188	2,600	582,304

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	217	100%	80.2%	3.6 min	0.5%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
CPR–DEN	Casper to Denver	217	80.2%	3.6 min	0.5%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), December 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2025	Minutes
Air carrier	29.6%	33.3%	1,014
Late-arriving aircraft	45.7%	41.1%	1,567
National Aviation System	12.6%	19.1%	431
Extreme weather	12.1%	6.4%	416
Security	0.0%	0.2%	0

3,428 delay minutes on 41 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left CPR on time in December 2025?

80.6% of 217 scheduled domestic departures left less than 15 minutes late, and 80.2% reached their destination on time. The national figures that month were 72.0% and 71.9%.

How does that compare with a year earlier?

In December 2024, 91.5% of 188 departures left on time and 0.0% were cancelled, against 80.6% and 0.5% in December 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for December 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for CPR · methodology · corrections.