MBS International in December 2025

56.2%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 146 domestic departures from MBS International (MBS). 56.2% left less than 15 minutes late and 51.4% reached their destination on time; 5.5% were cancelled.

Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so MBS departures were 15.8 points below the national departure figure.

A year earlier, in December 2024, the airport had 194 departures with 69.6% leaving on time: a change of −13.4 points, with flights down 25%.

Flights arriving at MBS that month were on time 54.8% of the time (146 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 50%, extreme weather 21% and late-arriving aircraft 16%.

On time 51.4%
Arrived 15+ minutes late 43.2%
Cancelled 5.5%
Diverted 0.0%

Every scheduled departure from MBS 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	MBS, 12 months to Jul 2026	All reported flights, Dec 2025
Departed on time	56.2%	69.6%	76.6%	72.0%
Arrived on time	51.4%	67.5%	72.9%	71.9%
Cancelled	5.5%	1.0%	2.0%	1.5%
Average departure delay (late minutes only)	62.3 min	25.8 min	27.1 min	21.2 min
Scheduled departures a day	5	7	6	19,410
Scheduled departures	146	194	2,061	582,304

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	146	100%	51.4%	60.7 min	5.5%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MBS–ORD	Saginaw/Bay City/Midland to Chicago	77	53.2%	55.6 min	6.5%
MBS–DTW	Saginaw/Bay City/Midland to Detroit	69	49.3%	66.4 min	4.3%

By scheduled departure hour

100

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	50.0%	33.3%	4,586
Late-arriving aircraft	15.8%	41.1%	1,451
National Aviation System	13.0%	19.1%	1,194
Extreme weather	21.2%	6.4%	1,948
Security	0.0%	0.2%	0

9,179 delay minutes on 63 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 MBS on time in December 2025?

56.2% of 146 scheduled domestic departures left less than 15 minutes late, and 51.4% 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, 69.6% of 194 departures left on time and 1.0% were cancelled, against 56.2% and 5.5% 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 MBS · methodology · corrections.