Historical on-time performance
New York to Chicago
725 miData through May 2026Source: US DOT · BTS
Flights on LGA–MDW arrive on time 69% of the time over the last 12 months.
On-time rate69%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled4.5%of scheduled flights
based on 2,368 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time69%Medianon timep9060 minCancel4.5%Flights2,368
Why flights run late
Delay causes
- Airline22%
- Weather7%
- Air traffic (NAS)24%
- Late aircraft47%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline12%
- Weather53%
- Air traffic (NAS)35%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 106 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 LGA → MDW
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 87% on time.
- Mornings87% on time · p90 15 min · 2,007 flights
- Middays80% on time · p90 25 min · 1,170 flights
- Afternoons71% on time · p90 50 min · 1,863 flights
- Evenings63% on time · p90 80 min · 1,296 flights
- Overnights60% on time · p90 75 min · 962 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 78% on time.
- Saturdays78% on time · p90 30 min · 628 flights
- Wednesdays78% on time · p90 40 min · 1,149 flights
- Tuesdays76% on time · p90 45 min · 1,148 flights
- Thursdays74% on time · p90 45 min · 1,132 flights
- Fridays72% on time · p90 60 min · 1,137 flights
- Mondays72% on time · p90 55 min · 1,130 flights
- Sundays71% on time · p90 55 min · 974 flights
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