Chicago Midway International in July 2025

62.4%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 July 2025, reporting carriers scheduled 7,531 domestic departures from Chicago Midway International (MDW). 62.4% left less than 15 minutes late and 65.7% reached their destination on time; 1.8% were cancelled.

Nationally that month, 69.7% of flights departed on time and 69.0% arrived on time, so MDW departures were 7.3 points below the national departure figure.

A year earlier, in July 2024, the airport had 7,884 departures with 64.0% leaving on time: a change of −1.6 points, with flights down 4%.

Flights arriving at MDW that month were on time 70.5% of the time (7,532 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 51%, air carrier 29% and national aviation system 15%.

On time 65.7%
Arrived 15+ minutes late 32.1%
Cancelled 1.8%
Diverted 0.3%

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

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

Measure	Jul 2025	Jul 2024	MDW, 12 months to Jul 2026	All reported flights, Jul 2025
Departed on time	62.4%	64.0%	70.7%	69.7%
Arrived on time	65.7%	65.6%	73.9%	69.0%
Cancelled	1.8%	1.3%	1.5%	2.5%
Average departure delay (late minutes only)	25.7 min	22.0 min	16.5 min	24.3 min
Scheduled departures a day	251	263	202	21,048
Scheduled departures	7,531	7,884	73,744	631,428

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	7,029	93%	65.6%	19.2 min	1.9%
F9 Frontier Airlines	159	2%	61.0%	19.9 min	0.6%
OO SkyWest Airlines	149	2%	73.2%	13.8 min	0.0%
DL Delta Air Lines	138	2%	73.9%	10.6 min	1.4%
G4 Allegiant Air	56	1%	60.7%	27.4 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MDW–ATL	Chicago to Atlanta	324	69.4%	17.5 min	1.5%
MDW–DEN	Chicago to Denver	299	60.9%	25.0 min	1.0%
MDW–MCO	Chicago to Orlando	259	68.7%	13.5 min	2.3%
MDW–LAS	Chicago to Las Vegas	258	67.8%	15.4 min	1.2%
MDW–PHX	Chicago to Phoenix	252	68.7%	18.9 min	1.2%
MDW–MSP	Chicago to Minneapolis	249	69.1%	16.1 min	0.4%
MDW–LGA	Chicago to New York	204	58.8%	22.8 min	6.9%
MDW–MCI	Chicago to Kansas City	203	70.4%	16.7 min	2.5%
MDW–DAL	Chicago to Dallas	202	67.3%	19.3 min	2.5%
MDW–BWI	Chicago to Baltimore	188	61.7%	26.7 min	4.3%
MDW–HOU	Chicago to Houston	186	59.1%	14.8 min	2.2%
MDW–DCA	Chicago to Washington	181	59.7%	29.2 min	6.6%

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), July 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2025	Minutes
Air carrier	29.3%	31.1%	48,888
Late-arriving aircraft	50.5%	40.8%	84,234
National Aviation System	15.2%	20.7%	25,350
Extreme weather	4.5%	7.3%	7,558
Security	0.4%	0.1%	675

166,705 delay minutes on 2,419 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 July 2025?

62.4% of 7,531 scheduled domestic departures left less than 15 minutes late, and 65.7% reached their destination on time. The national figures that month were 69.7% and 69.0%.

How does that compare with a year earlier?

In July 2024, 64.0% of 7,884 departures left on time and 1.3% were cancelled, against 62.4% and 1.8% in July 2025.

Provenance

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