Rapid City Regional in May 2026

81.7%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 624 domestic departures from Rapid City Regional (RAP). 81.7% left less than 15 minutes late and 80.1% reached their destination on time; 1.3% were cancelled.

Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so RAP departures were 4.6 points above the national departure figure.

A year earlier, in May 2025, the airport had 549 departures with 75.8% leaving on time: a change of +5.9 points, with flights up 14%.

Flights arriving at RAP that month were on time 76.7% of the time (623 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 46%, air carrier 32% and national aviation system 15%.

On time 80.1%
Arrived 15+ minutes late 17.6%
Cancelled 1.3%
Diverted 1.0%

Every scheduled departure from RAP 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	RAP, 12 months to Jul 2026	All reported flights, May 2026
Departed on time	81.7%	75.8%	81.3%	77.1%
Arrived on time	80.1%	74.1%	78.4%	77.6%
Cancelled	1.3%	2.9%	1.3%	0.9%
Average departure delay (late minutes only)	17.4 min	23.4 min	17.2 min	16.0 min
Scheduled departures a day	21	18	16	20,391
Scheduled departures	624	549	5,669	611,735

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	355	57%	79.2%	8.7 min	1.4%
MQ Envoy Air	146	23%	80.8%	6.3 min	1.4%
UA United Airlines	83	13%	88.0%	4.6 min	1.2%
G4 Allegiant Air	27	4%	70.4%	4.7 min	0.0%
OH PSA Airlines	11	2%	63.6%	0.8 min	0.0%
DL Delta Air Lines	2	0%	100.0%	1.5 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
RAP–DEN	Rapid City to Denver	261	82.0%	9.2 min	1.1%
RAP–MSP	Rapid City to Minneapolis	113	85.0%	1.2 min	0.9%
RAP–DFW	Rapid City to Dallas/Fort Worth	104	77.9%	11.6 min	1.9%
RAP–ORD	Rapid City to Chicago	104	76.0%	6.4 min	1.9%
RAP–AZA	Rapid City to Phoenix	14	92.9%	-5.1 min	0.0%
RAP–CLT	Rapid City to Charlotte	11	63.6%	0.8 min	0.0%
RAP–LAS	Rapid City to Las Vegas	9	44.4%	6.3 min	0.0%
RAP–SFB	Rapid City to Sanford	4	50.0%	36.3 min	0.0%
RAP–ATL	Rapid City to Atlanta	2	100.0%	1.5 min	0.0%
RAP–IAH	Rapid City to Houston	2	100.0%	5.5 min	0.0%

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	32.1%	33.0%	3,382
Late-arriving aircraft	46.0%	40.4%	4,851
National Aviation System	15.0%	20.5%	1,587
Extreme weather	6.9%	6.0%	727
Security	0.0%	0.1%	0

10,547 delay minutes on 110 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 RAP on time in May 2026?

81.7% of 624 scheduled domestic departures left less than 15 minutes late, and 80.1% 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, 75.8% of 549 departures left on time and 2.9% were cancelled, against 81.7% and 1.3% 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 RAP · methodology · corrections.