Historical on-time performance
Los Angeles to Chicago
1,751 miData through Dec 2025Source: US DOT · BTS
Flights on LAX–MDW arrive on time 85% of the time over the last 12 months.
On-time rate85%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights
based on 1,367 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time85%Medianon timep9020 minCancel0.4%Flights1,367
Why flights run late
Delay causes
- Airline31%
- Weather1%
- Air traffic (NAS)12%
- Late aircraft56%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly LAX → MDW
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 92% on time.
- Mornings92% on time · p90 10 min · 1,452 flights
- Overnights87% on time · p90 15 min · 316 flights
- Middays80% on time · p90 25 min · 1,083 flights
- Evenings69% on time · p90 50 min · 771 flights
- Afternoons61% on time · p90 60 min · 552 flights
Best day of week
Saturdays are the most reliable day to fly this route — 87% on time.
- Saturdays87% on time · p90 15 min · 474 flights
- Wednesdays82% on time · p90 25 min · 605 flights
- Tuesdays81% on time · p90 30 min · 609 flights
- Mondays80% on time · p90 35 min · 647 flights
- Thursdays79% on time · p90 35 min · 635 flights
- Sundays77% on time · p90 30 min · 558 flights
- Fridays77% on time · p90 30 min · 646 flights
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