Airport month record
MDWJUN
Chicago Midway International in June 2026
- Departures
- 6,937
- Month
- June 2026
- National, same month
- 74.3%
- Carriers
- 4
Historical statistics for June 2026, not live status or a forecast for this year’s June. For today’s conditions at MDW, see live FAA status.
MDW in June draws a D. About one flight in three arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 6,937 flights, with a median arrival 4 minutes late.
The national on-time rate over the same period is 74.3%, so mdw in june runs 10 points behind the country as a whole. Across a thousand flights that is about 101 extra late arrivals.
Key figures
On time
64.2%
Arrivals under 15 minutes late, of 6,798 completed departures
Avg delay
60 min
Across delayed arrivals only, not all flights
Cancelled
1.53%
Nationally in June: 1.65%
Whole year
75.1%
MDW across all twelve months
These figures cover 6,937 departures from Chicago Midway International in June 2026. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.
Against the year
June next to MDW's other months
Against MDW's own year, June ran 11 points worse than the twelve-month rate of 75.1%, which makes it the worst of the twelve months in the data.
| Month | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| July 2025 | 7,531 | 67.2% | 69 min | 1.81% | C |
| August 2025 | 6,731 | 77.8% | 58 min | 0.74% | B+ |
| September 2025 | 6,459 | 84.1% | 46 min | 0.06% | B+ |
| October 2025 | 6,536 | 80.2% | 45 min | 0.17% | B+ |
| November 2025 | 5,620 | 80.6% | 59 min | 4.96% | B− |
| December 2025 | 5,738 | 69.7% | 57 min | 0.45% | C+ |
| January 2026 | 4,848 | 80.9% | 50 min | 2.15% | B |
| February 2026 | 4,537 | 81.6% | 46 min | 0.90% | B+ |
| March 2026 | 6,508 | 68.7% | 67 min | 3.89% | C− |
| April 2026 | 6,282 | 77.6% | 52 min | 1.18% | B |
| May 2026 | 6,269 | 74.0% | 53 min | 0.35% | C+ |
| June 2026 (this page) | 6,937 | 64.2% | 60 min | 1.53% | D |
Departure window
The best time of day to leave MDW in June
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 44 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am932 flights89.4%
- 8am–11am1,533 flights78.3%
- 11am–2pm1,227 flights69.1%
- 2pm–5pm806 flights54.7%
- 5pm–8pm1,353 flights45.8%
- 8pm–5am1,086 flights45.7%
Scale runs 35% to 95%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 45.7% on time, against 89.4% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 8am–11am window is the busiest, with 1,533 flights scheduled in it.
Across the week, Tuesday is the strongest day at 73.7% on time and Sunday the weakest at 51.7%. 22 points is a smaller lever than departure hour, but it is free.
Carrier by carrier
Which airlines ran best at MDW in June
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 6,699 | 63.8% | 58 min | 1.54% | D |
| Delta Air Linesthin sample | 113 | 87.5% | 90 min | 0.00% | A+ |
| Frontier Airlinesthin sample | 83 | 68.4% | 93 min | 3.61% | C− |
| Allegiant Airthin sample | 42 | 61.9% | 187 min | 0.00% | D+ |
Route by route
Busiest routes out of MDW in June
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| MDW to ATL · Atlantathin sample | 308 | 74.2% | 53 min | 1.62% | C |
| MDW to MCO · Orlandothin sample | 234 | 60.7% | 61 min | 1.71% | D |
| MDW to DEN · Denverthin sample | 220 | 64.2% | 59 min | 1.36% | D |
| MDW to PHX · Phoenixthin sample | 218 | 58.5% | 60 min | 2.29% | D |
| MDW to LGA · New Yorkthin sample | 206 | 61.5% | 55 min | 4.37% | D− |
| MDW to MCI · Kansas Citythin sample | 199 | 71.6% | 52 min | 2.51% | C |
| MDW to DAL · Dallasthin sample | 195 | 64.4% | 61 min | 2.56% | D |
| MDW to LAS · Las Vegasthin sample | 188 | 61.5% | 60 min | 0.53% | D+ |
| MDW to HOU · Houstonthin sample | 176 | 57.8% | 60 min | 1.70% | D |
| MDW to DCA · Washingtonthin sample | 176 | 66.9% | 68 min | 1.70% | C |
| MDW to BWI · Baltimorethin sample | 174 | 73.7% | 63 min | 1.72% | C |
| MDW to STL · St. Louisthin sample | 162 | 73.0% | 67 min | 1.85% | C |
| MDW to BNA · Nashvillethin sample | 151 | 71.4% | 65 min | 2.65% | C |
| MDW to BOS · Bostonthin sample | 143 | 60.3% | 56 min | 1.40% | D |
| MDW to PHL · Philadelphiathin sample | 142 | 76.3% | 99 min | 1.41% | B |
| MDW to AUS · Austinthin sample | 133 | 67.4% | 42 min | 3.01% | C− |
| MDW to MSP · Minneapolisthin sample | 132 | 64.1% | 45 min | 2.27% | D |
| MDW to TPA · Tampathin sample | 132 | 70.2% | 65 min | 0.76% | C+ |
| MDW to OMA · Omahathin sample | 115 | 59.6% | 61 min | 0.87% | D+ |
| MDW to CMH · Columbusthin sample | 113 | 77.5% | 42 min | 1.77% | B |
| MDW to LAX · Los Angelesthin sample | 110 | 52.8% | 57 min | 0.00% | F+ |
| MDW to CLE · Clevelandthin sample | 109 | 76.6% | 69 min | 1.83% | B |
| MDW to SAN · San Diegothin sample | 103 | 50.0% | 39 min | 2.91% | F |
| MDW to MSY · New Orleansthin sample | 90 | 61.4% | 58 min | 2.22% | D |
| MDW to SDF · Louisvillethin sample | 90 | 76.4% | 53 min | 1.11% | B |
Delay causes
What held MDW up in June
One category carries most of the weight here. Late-arriving aircraft accounts for 48% of the 145,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 48%Late-arriving aircraft
- 32%Carrier
- 16%National Airspace System
- 4%Extreme weather
- 0%Security
48% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 145,000 reported delay minutes here, that single category outweighs weather by 13 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 145,312 reported delay minutes.
Cancellations sit at 1.53% against a national 1.65%, which is ordinary. Diversions add another 0.48%.
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 11.7% of arrivals land a full hour or more behind schedule, against 9.7% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
What to do with this
Flying from MDW in June
For a June trip through MDW: plan on this being one of the airport's harder months. The 5am–8am departures held up best at 89.4% on time, and with 11.7% of arrivals an hour or more late, a connection here deserves more slack than the same trip in September would.
Related
Where to go next
- Chicago Midway International (MDW), the whole year
- MDW in July67.2%
- MDW in August77.8%
- MDW in September84.1%
- MDW in October80.2%
- MDW in November80.6%
- MDW in December69.7%
- MDW in January80.9%
- MDW in February81.6%
- MDW in March68.7%
- MDW in April77.6%
- MDW in May74.0%
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.