is the most reliable airline on the MIA to RDU route with a 87% on-time rate, compared to Delta Air Lines at 68%. Based on 790 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: MIA to RDU
Miami to Raleigh — airline reliability comparison
On-Time Rate by Airline
87%
Spirit Airlines78%
Frontier Airlines75%
American Airlines69%
Endeavor Air69%
Delta Air Lines68%
MIA to RDU Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| MQBest | 87% | 0.8% | 43m | 790 |
| Spirit AirlinesNK | 78% | 1.1% | 91m | 179 |
| Frontier AirlinesF9 | 75% | 2.3% | 83m | 454 |
| American AirlinesAA | 69% | 1.3% | 74m | 5,617 |
| Endeavor Air9E | 69% | 0.0% | 69m | 16 |
| Delta Air LinesDLWorst | 68% | 1.8% | 88m | 1,300 |
Route Overview
72%
Overall On-Time
77m
Avg Delay
1.4%
Cancel Rate
8,512
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.