SkyWest Airlines in December 2025

71.2%arrived 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, SkyWest Airlines (OO) reported 68,814 scheduled domestic flights. 71.2% arrived on time, 1.9% were cancelled and 0.4% diverted.

All reporting carriers together recorded 71.9% on time and 1.5% cancelled that month, so the carrier was 0.7 points below the combined figure.

A year earlier, in December 2024, it reported 66,601 flights with 76.9% on time: a change of −5.7 points.

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 44%, late-arriving aircraft 22% and extreme weather 17%.

On time 71.2%
Arrived 15+ minutes late 26.4%
Cancelled 1.9%
Diverted 0.4%

Every scheduled domestic flight reported by SkyWest Airlines in December 2025.

December 2025 against a year earlier, the carrier's year and all carriers

Measure	Dec 2025	Dec 2024	OO, 12 months to Jul 2026	All carriers, Dec 2025
Arrived on time	71.2%	76.9%	77.4%	71.9%
Departed on time	73.6%	78.8%	79.5%	72.0%
Cancelled	1.9%	1.3%	1.8%	1.5%
Average arrival delay	21.0 min	10.1 min	9.6 min	13.0 min
Scheduled flights a day	2,294	2,220	2,340	19,410
Scheduled flights	68,814	66,601	854,130	582,304

235 airports and 1,296 routes had OO flights that month.

Busiest airports that month

Airport	Departures	On time	Avg arrival delay	Cancelled
DEN Denver	6,240	75.5%	12.4 min	0.9%
ORD Chicago	5,818	48.1%	56.4 min	4.5%
LAX Los Angeles	3,397	80.5%	6.1 min	0.6%
SLC Salt Lake City	2,990	89.2%	-6.0 min	0.4%
SFO San Francisco	2,793	69.4%	23.7 min	2.2%
PHX Phoenix	2,487	81.2%	5.2 min	0.6%
SEA Seattle	2,271	81.8%	4.7 min	0.3%
DTW Detroit	2,261	52.9%	51.0 min	3.4%
MSP Minneapolis	2,017	56.7%	33.5 min	2.8%
DFW Dallas/Fort Worth	1,811	79.9%	7.8 min	0.1%
SAN San Diego	1,181	70.9%	10.1 min	2.4%
IAH Houston	1,079	73.7%	21.3 min	0.4%
BOI Boise	937	84.7%	0.2 min	0.3%
PDX Portland	823	78.6%	7.3 min	0.7%
ASE Aspen	803	59.8%	34.0 min	4.0%

By scheduled departure hour

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

Share of OO flights that arrived on time, by scheduled departure hour (local time at each origin), December 2025.

Delay causes

BTS cause category	Share of delay minutes	All carriers, Dec 2025	Minutes
Air carrier	44.2%	33.3%	871,661
Late-arriving aircraft	22.4%	41.1%	441,531
National Aviation System	16.4%	19.1%	324,146
Extreme weather	16.9%	6.4%	333,444
Security	0.1%	0.2%	1,082

1,971,864 delay minutes on 18,199 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

What share of SkyWest Airlines flights were on time in December 2025?

71.2% of 68,814 scheduled domestic flights arrived less than 15 minutes late; all reporting carriers together recorded 71.9% that month.

How does that compare with a year earlier?

In December 2024 the carrier reported 66,601 flights with 76.9% on time and 1.3% cancelled, against 71.2% and 1.9% in December 2025.

Provenance

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