Historical on-time performance
Raleigh-durham to Chicago
632 miData through Dec 2025Source: US DOT · BTS
Flights on RDU–MDW arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled1.1%of scheduled flights
based on 1,014 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time82%Medianon timep9030 minCancel1.1%Flights1,014
Why flights run late
Delay causes
- Airline18%
- Weather5%
- Air traffic (NAS)17%
- Late aircraft60%
- 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 RDU → 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 5 min · 1,077 flights
- Middays82% on time · p90 25 min · 673 flights
- Afternoons74% on time · p90 35 min · 397 flights
- Evenings68% on time · p90 50 min · 811 flights
- Overnights63% on time · p90 70 min · 314 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 83% on time.
- Tuesdays83% on time · p90 30 min · 472 flights
- Mondays82% on time · p90 30 min · 522 flights
- Wednesdays81% on time · p90 30 min · 511 flights
- Thursdays78% on time · p90 30 min · 473 flights
- Fridays76% on time · p90 35 min · 519 flights
- Saturdays76% on time · p90 40 min · 318 flights
- Sundays76% on time · p90 40 min · 457 flights
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