Historical on-time performance
Chicago to Raleigh-durham
632 miData through May 2026Source: US DOT · BTS
Flights on MDW–RDU arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled1.9%of scheduled flights
based on 1,009 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time79%Medianon timep9030 minCancel1.9%Flights1,009
Why flights run late
Delay causes
- Airline30%
- Weather1%
- Air traffic (NAS)17%
- Late aircraft52%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline5%
- Weather95%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 19 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 → RDU
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 — 89% on time.
- Mornings89% on time · p90 15 min · 914 flights
- Middays79% on time · p90 25 min · 770 flights
- Afternoons75% on time · p90 40 min · 406 flights
- Evenings71% on time · p90 40 min · 788 flights
- Overnights59% on time · p90 60 min · 318 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 80% on time.
- Tuesdays80% on time · p90 30 min · 449 flights
- Wednesdays79% on time · p90 30 min · 488 flights
- Thursdays79% on time · p90 35 min · 455 flights
- Mondays78% on time · p90 25 min · 498 flights
- Saturdays77% on time · p90 35 min · 344 flights
- Fridays74% on time · p90 35 min · 501 flights
- Sundays74% on time · p90 50 min · 461 flights
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