Route
MDW → DSM
Chicago Midway International Airport Des Moines International Airport
306 miles
Return route DSM → MDW →
How punctual is this route?
- On-time arrivals
- 69.2%
- Less than 15 minutes late
- Cancelled
- 1.1%
- Of scheduled flights
- Average delay when late
- 65 min
- Flights arriving 15+ minutes late
- Flights tracked
- 352
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 54%
- Airline (crew, maintenance, cleaning) 31%
- Air traffic control & airport 7%
- Extreme weather 7%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Mar 2026
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| March 2026 | 70.6% | 54 |
| April 2026 | 75.0% | 57 |
| May 2026 | 78.9% | 57 |
| June 2026 | 60.0% | 60 |
| July 2026 | 75.4% | 62 |
| August 2026 | 56.5% | 62 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Southwest Airlines | 352 | 69.2% | 1.1% | 65 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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