MDW → DCA Southwest Airlines

Southwest Airlines · Chicago, IL to Washington, DC · 2,104 flights, 2025-07-01 to 2026-06-30 · aggregated across 97 flight numbers

This route runs much more reliably at some times of day than others — 95% on-time departing 3–6am vs. 53% departing 9pm–12am.
On-time arrival
70%
Median delay
-1 min
90th percentile
+58 min
Cancellation rate
2%

How on-time is Southwest Airlines from MDW to DCA?

Across every Southwest Airlines flight number on MDW → DCA (2,104 flights, 2025-07-01 to 2026-06-30), 70% arrived within 15 minutes of schedule. Median arrival delay -1 min; the worst 10% ran +58 min or later. 2% were cancelled.

Delay distribution

Arrival delay for completed flights (excludes cancellations and diversions).

ArrivalFlightsShare
Early / on-time1,44170%
16-30 min21010%
31-60 min20210%
61-120 min1266%
2+ hrs693%

Performance by month

MonthFlightsOn-timeAvg delay
2025-0716666%+29 min
2025-0817976%+7 min
2025-0917680%+4 min
2025-1018171%+10 min
2025-1115969%+13 min
2025-1217368%+12 min
2026-0116877%+5 min
2026-0215574%+5 min
2026-0317462%+22 min
2026-0417272%+10 min
2026-0517663%+15 min
2026-0616967%+19 min

Performance by day of week

DayFlightsOn-time
Mon29570%
Tue30976%
Wed30574%
Thu30268%
Fri29866%
Sat24475%
Sun29564%

Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…