Chicago Midway International in June 2026

59.4%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 June 2026, reporting carriers scheduled 6,937 domestic departures from Chicago Midway International (MDW). 59.4% left less than 15 minutes late and 62.9% reached their destination on time; 1.5% were cancelled.

Nationally that month, 72.2% of flights departed on time and 72.8% arrived on time, so MDW departures were 12.8 points below the national departure figure.

A year earlier, in June 2025, the airport had 7,187 departures with 66.3% leaving on time: a change of −6.9 points, with flights down 3%.

Flights arriving at MDW that month were on time 68.8% of the time (6,938 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 48%, air carrier 32% and national aviation system 16%.

On time 62.9%
Arrived 15+ minutes late 35.1%
Cancelled 1.5%
Diverted 0.5%

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

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

Measure	Jun 2026	Jun 2025	MDW, 12 months to Jul 2026	All reported flights, Jun 2026
Departed on time	59.4%	66.3%	70.7%	72.2%
Arrived on time	62.9%	69.3%	73.9%	72.8%
Cancelled	1.5%	0.6%	1.5%	1.6%
Average departure delay (late minutes only)	24.1 min	20.6 min	16.5 min	20.6 min
Scheduled departures a day	231	240	202	20,253
Scheduled departures	6,937	7,187	73,744	607,577

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	6,699	97%	62.5%	18.0 min	1.5%
DL Delta Air Lines	113	2%	86.7%	-4.0 min	0.0%
F9 Frontier Airlines	83	1%	65.1%	19.9 min	3.6%
G4 Allegiant Air	42	1%	61.9%	67.2 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MDW–ATL	Chicago to Atlanta	308	72.7%	4.7 min	1.6%
MDW–MCO	Chicago to Orlando	234	58.1%	21.1 min	1.7%
MDW–DEN	Chicago to Denver	220	62.7%	18.1 min	1.4%
MDW–PHX	Chicago to Phoenix	218	56.9%	23.4 min	2.3%
MDW–LGA	Chicago to New York	206	57.3%	17.4 min	4.4%
MDW–MCI	Chicago to Kansas City	199	69.8%	11.9 min	2.5%
MDW–DAL	Chicago to Dallas	195	62.1%	18.4 min	2.6%
MDW–LAS	Chicago to Las Vegas	188	61.2%	20.7 min	0.5%
MDW–DCA	Chicago to Washington	176	64.2%	18.7 min	1.7%
MDW–HOU	Chicago to Houston	176	56.8%	23.1 min	1.7%
MDW–BWI	Chicago to Baltimore	174	72.4%	12.3 min	1.7%
MDW–STL	Chicago to St. Louis	162	71.6%	12.4 min	1.9%

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), June 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Jun 2026	Minutes
Air carrier	32.1%	30.8%	46,574
Late-arriving aircraft	47.8%	42.1%	69,488
National Aviation System	16.2%	20.3%	23,496
Extreme weather	3.6%	6.7%	5,275
Security	0.3%	0.1%	479

145,312 delay minutes on 2,434 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 June 2026?

59.4% of 6,937 scheduled domestic departures left less than 15 minutes late, and 62.9% reached their destination on time. The national figures that month were 72.2% and 72.8%.

How does that compare with a year earlier?

In June 2025, 66.3% of 7,187 departures left on time and 0.6% were cancelled, against 59.4% and 1.5% in June 2026.

Provenance

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