Casper/Natrona County International in May 2026

81.4%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 2026, reporting carriers scheduled 226 domestic departures from Casper/Natrona County International (CPR). 81.4% left less than 15 minutes late and 81.0% reached their destination on time; 0.4% were cancelled.

Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so CPR departures were 4.3 points above the national departure figure.

A year earlier, in May 2025, the airport had 196 departures with 70.4% leaving on time: a change of +11.0 points, with flights up 15%.

Flights arriving at CPR that month were on time 79.2% of the time (226 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 49%, late-arriving aircraft 28% and national aviation system 22%.

On time 81.0%
Arrived 15+ minutes late 17.7%
Cancelled 0.4%
Diverted 0.9%

Every scheduled departure from CPR in May 2026, judged by arrival at the destination.

May 2026 against a year earlier, the airport's year and the nation

Measure	May 2026	May 2025	CPR, 12 months to Jul 2026	All reported flights, May 2026
Departed on time	81.4%	70.4%	83.2%	77.1%
Arrived on time	81.0%	63.3%	82.1%	77.6%
Cancelled	0.4%	0.5%	0.8%	0.9%
Average departure delay (late minutes only)	12.3 min	28.7 min	16.7 min	16.0 min
Scheduled departures a day	8	7	7	20,391
Scheduled departures	226	196	2,600	611,735

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	226	100%	81.0%	0.2 min	0.4%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
CPR–DEN	Casper to Denver	226	81.0%	0.2 min	0.4%

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 2026.

Delay causes

BTS cause category	Share of delay minutes	National, May 2026	Minutes
Air carrier	49.4%	33.0%	1,352
Late-arriving aircraft	28.4%	40.4%	779
National Aviation System	22.2%	20.5%	608
Extreme weather	0.0%	6.0%	0
Security	0.0%	0.1%	0

2,739 delay minutes on 40 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 2026?

81.4% of 226 scheduled domestic departures left less than 15 minutes late, and 81.0% reached their destination on time. The national figures that month were 77.1% and 77.6%.

How does that compare with a year earlier?

In May 2025, 70.4% of 196 departures left on time and 0.5% were cancelled, against 81.4% and 0.4% in May 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2026; 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.