Chicago Midway International in October 2025

77.8%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 October 2025, reporting carriers scheduled 6,536 domestic departures from Chicago Midway International (MDW). 77.8% left less than 15 minutes late and 79.9% reached their destination on time; 0.2% were cancelled.

Nationally that month, 80.0% of flights departed on time and 79.1% arrived on time, so MDW departures were 2.2 points below the national departure figure.

A year earlier, in October 2024, the airport had 6,744 departures with 84.1% leaving on time: a change of −6.3 points, with flights down 3%.

Flights arriving at MDW that month were on time 81.6% of the time (6,534 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 43%, air carrier 34% and national aviation system 23%.

On time 79.9%
Arrived 15+ minutes late 19.7%
Cancelled 0.2%
Diverted 0.2%

Every scheduled departure from MDW in October 2025, judged by arrival at the destination.

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

Measure	Oct 2025	Oct 2024	MDW, 12 months to Jul 2026	All reported flights, Oct 2025
Departed on time	77.8%	84.1%	70.7%	80.0%
Arrived on time	79.9%	87.7%	73.9%	79.1%
Cancelled	0.2%	0.9%	1.5%	0.5%
Average departure delay (late minutes only)	11.4 min	8.0 min	16.5 min	13.9 min
Scheduled departures a day	218	225	202	20,195
Scheduled departures	6,536	6,744	73,744	605,844

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	6,018	92%	79.4%	4.7 min	0.2%
F9 Frontier Airlines	216	3%	79.2%	2.5 min	0.5%
OO SkyWest Airlines	153	2%	91.5%	-7.7 min	0.0%
DL Delta Air Lines	113	2%	92.0%	-10.3 min	0.0%
G4 Allegiant Air	36	1%	66.7%	22.3 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MDW–ATL	Chicago to Atlanta	304	87.5%	-2.6 min	0.0%
MDW–PHX	Chicago to Phoenix	265	74.7%	7.9 min	0.0%
MDW–MCO	Chicago to Orlando	246	81.3%	3.4 min	0.8%
MDW–MSP	Chicago to Minneapolis	246	87.4%	-3.9 min	0.0%
MDW–DEN	Chicago to Denver	213	80.8%	4.1 min	0.0%
MDW–LAS	Chicago to Las Vegas	209	83.3%	1.2 min	0.0%
MDW–LGA	Chicago to New York	204	61.3%	16.5 min	2.5%
MDW–MCI	Chicago to Kansas City	198	85.4%	1.6 min	0.0%
MDW–DAL	Chicago to Dallas	195	80.0%	3.1 min	1.0%
MDW–BWI	Chicago to Baltimore	185	84.3%	1.5 min	0.0%
MDW–DCA	Chicago to Washington	181	68.5%	10.5 min	0.0%
MDW–BNA	Chicago to Nashville	169	76.9%	7.8 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), October 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Oct 2025	Minutes
Air carrier	33.6%	34.0%	19,588
Late-arriving aircraft	42.5%	39.7%	24,761
National Aviation System	23.3%	22.9%	13,597
Extreme weather	0.4%	3.3%	217
Security	0.2%	0.1%	119

58,282 delay minutes on 1,290 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 MDW on time in October 2025?

77.8% of 6,536 scheduled domestic departures left less than 15 minutes late, and 79.9% reached their destination on time. The national figures that month were 80.0% and 79.1%.

How does that compare with a year earlier?

In October 2024, 84.1% of 6,744 departures left on time and 0.9% were cancelled, against 77.8% and 0.2% in October 2025.

Provenance

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