Southwest Airlines is the most reliable airline on the RDU to MDW route with a 82% on-time rate, compared to Frontier Airlines at 70%. Based on 3,648 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: RDU to MDW
Raleigh to Chicago — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines82%
Frontier Airlines70%
RDU to MDW Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 82% | 1.6% | 56m | 3,648 |
| Frontier AirlinesF9Worst | 70% | 2.5% | 88m | 119 |
Route Overview
81%
Overall On-Time
59m
Avg Delay
1.6%
Cancel Rate
3,795
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.