Southwest Airlines is the most reliable airline on the MDW to RDU route with a 79% on-time rate, compared to Frontier Airlines at 69%. Based on 3,634 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: MDW to RDU
Chicago to Raleigh — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines79%
Frontier Airlines69%
MDW to RDU Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 79% | 1.5% | 48m | 3,634 |
| Frontier AirlinesF9Worst | 69% | 2.8% | 60m | 120 |
Route Overview
78%
Overall On-Time
50m
Avg Delay
1.5%
Cancel Rate
3,782
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.