Casper/Natrona County International in May 2025

70.4%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 May 2025, reporting carriers scheduled 196 domestic departures from Casper/Natrona County International (CPR). 70.4% left less than 15 minutes late and 63.3% reached their destination on time; 0.5% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so CPR departures were 6.3 points below the national departure figure.

A year earlier, in May 2024, the airport had 102 departures with 88.2% leaving on time: a change of −17.8 points, with flights up 92%.

Flights arriving at CPR that month were on time 69.0% of the time (197 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 43%, national aviation system 21% and extreme weather 20%.

On time 63.3%
Arrived 15+ minutes late 35.7%
Cancelled 0.5%
Diverted 0.5%

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

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

Measure	May 2025	May 2024	CPR, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	70.4%	88.2%	83.2%	76.7%
Arrived on time	63.3%	89.2%	82.1%	75.4%
Cancelled	0.5%	0.0%	0.8%	1.0%
Average departure delay (late minutes only)	28.7 min	15.1 min	16.7 min	17.5 min
Scheduled departures a day	7	3	7	20,188
Scheduled departures	196	102	2,600	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	196	100%	63.3%	24.3 min	0.5%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
CPR–DEN	Casper to Denver	196	63.3%	24.3 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), May 2025.

Delay causes

BTS cause category	Share of delay minutes	National, May 2025	Minutes
Air carrier	42.6%	29.3%	2,419
Late-arriving aircraft	16.3%	37.8%	924
National Aviation System	21.0%	25.9%	1,191
Extreme weather	20.1%	6.9%	1,142
Security	0.0%	0.1%	0

5,676 delay minutes on 70 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 May 2025?

70.4% of 196 scheduled domestic departures left less than 15 minutes late, and 63.3% reached their destination on time. The national figures that month were 76.7% and 75.4%.

How does that compare with a year earlier?

In May 2024, 88.2% of 102 departures left on time and 0.0% were cancelled, against 70.4% and 0.5% in May 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 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.