Boston to Kansas City — airline reliability comparison
Spirit Airlines is the most reliable airline on the BOS to MCI route with a 84% on-time rate, compared to Southwest Airlines at 56%. Based on 105 flights tracked.
This route involves weather-prone airports, which can affect reliability regardless of airline.
Source: Bureau of Transportation Statistics. Updated October 2026.| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Spirit AirlinesNKBest | 84% | 5.9% | 70m | 105 |
| JetBlue AirwaysB6 | 83% | 1.2% | 47m | 243 |
| Republic AirwaysYX | 83% | 2.4% | 54m | 1,167 |
| Delta Air LinesDL | 78% | 0.8% | 72m | 882 |
| Southwest AirlinesWNWorst | 56% | 0.0% | 49m | 57 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.