Historical on-time performance
Chicago to San Antonio
Flights on MDW–SAT arrive on time 76% of the time over the last 12 months.
based on 657 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time76%Medianon timep9040 minCancel1.1%Flights657
Why flights run late
Delay causes
- Airline34%
- Weather1%
- Air traffic (NAS)16%
- Late aircraft49%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline14%
- Weather71%
- Air traffic (NAS)14%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 7 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly MDW → SAT
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 63% to 86% on time.
- Mornings86% on time · p90 20 min · 836 flights
- Middays80% on time · p90 25 min · 229 flights
- Afternoons77% on time · p90 55 min · 149 flights · limited
- Evenings71% on time · p90 50 min · 223 flights
- Overnights63% on time · p90 65 min · 647 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 83% on time.
- Wednesdays83% on time · p90 30 min · 294 flights
- Thursdays77% on time · p90 45 min · 312 flights
- Saturdays76% on time · p90 35 min · 260 flights
- Sundays75% on time · p90 50 min · 297 flights
- Mondays75% on time · p90 40 min · 313 flights
- Tuesdays73% on time · p90 45 min · 294 flights
- Fridays72% on time · p90 45 min · 314 flights
Keep exploring