Chicago Midway International in July 2026

57.4%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 2026, reporting carriers scheduled 7,279 domestic departures from Chicago Midway International (MDW). 57.4% left less than 15 minutes late and 67.0% reached their destination on time; 2.3% were cancelled.

Nationally that month, 68.8% of flights departed on time and 69.4% arrived on time, so MDW departures were 11.4 points below the national departure figure.

A year earlier, in July 2025, the airport had 7,531 departures with 62.4% leaving on time: a change of −5.0 points, with flights down 3%.

Flights arriving at MDW that month were on time 68.4% of the time (7,279 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 46%, air carrier 33% and national aviation system 15%.

On time 67.0%
Arrived 15+ minutes late 30.0%
Cancelled 2.3%
Diverted 0.7%

Every scheduled departure from MDW in July 2026, judged by arrival at the destination.

July 2026 against a year earlier, the airport's year and the nation

Measure	Jul 2026	Jul 2025	MDW, 12 months to Jul 2026	All reported flights, Jul 2026
Departed on time	57.4%	62.4%	70.7%	68.8%
Arrived on time	67.0%	65.7%	73.9%	69.4%
Cancelled	2.3%	1.8%	1.5%	2.6%
Average departure delay (late minutes only)	24.9 min	25.7 min	16.5 min	24.1 min
Scheduled departures a day	243	251	202	21,066
Scheduled departures	7,279	7,531	73,744	631,970

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	7,025	97%	67.1%	14.5 min	2.2%
DL Delta Air Lines	117	2%	73.5%	8.6 min	4.3%
F9 Frontier Airlines	92	1%	52.2%	22.5 min	7.6%
G4 Allegiant Air	45	1%	73.3%	9.8 min	2.2%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MDW–ATL	Chicago to Atlanta	323	62.5%	17.9 min	4.0%
MDW–MCO	Chicago to Orlando	241	69.3%	12.4 min	2.5%
MDW–DEN	Chicago to Denver	235	71.9%	12.1 min	1.7%
MDW–DAL	Chicago to Dallas	234	68.4%	13.3 min	1.7%
MDW–LGA	Chicago to New York	211	54.0%	18.9 min	8.5%
MDW–MCI	Chicago to Kansas City	208	65.9%	13.5 min	2.4%
MDW–HOU	Chicago to Houston	202	66.8%	11.6 min	1.5%
MDW–LAS	Chicago to Las Vegas	195	81.0%	2.2 min	0.5%
MDW–BWI	Chicago to Baltimore	193	62.2%	23.7 min	3.6%
MDW–PHX	Chicago to Phoenix	193	74.6%	4.9 min	3.1%
MDW–DCA	Chicago to Washington	177	64.4%	18.8 min	3.4%
MDW–STL	Chicago to St. Louis	172	72.7%	8.7 min	3.5%

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 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2026	Minutes
Air carrier	33.0%	31.7%	43,965
Late-arriving aircraft	46.4%	41.8%	61,882
National Aviation System	14.7%	19.9%	19,609
Extreme weather	5.2%	6.5%	6,978
Security	0.7%	0.1%	891

133,325 delay minutes on 2,181 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 2026?

57.4% of 7,279 scheduled domestic departures left less than 15 minutes late, and 67.0% reached their destination on time. The national figures that month were 68.8% and 69.4%.

How does that compare with a year earlier?

In July 2025, 62.4% of 7,531 departures left on time and 1.8% were cancelled, against 57.4% and 2.3% in July 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for July 2026; 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.