Chicago to Boston — airline reliability comparison
is the most reliable airline on the ORD to BOS route with a 86% on-time rate, compared to Spirit Airlines at 52%. Based on 1,704 flights tracked.
This route involves weather-prone airports and high-congestion airports, which can affect reliability regardless of airline.
Source: Bureau of Transportation Statistics. Updated October 2026.| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| MQBest | 86% | 1.2% | 52m | 1,704 |
| United AirlinesUA | 77% | 1.6% | 69m | 8,582 |
| Republic AirwaysYX | 76% | 2.2% | 71m | 2,460 |
| Delta Air LinesDL | 73% | 2.2% | 86m | 3,364 |
| SkyWest AirlinesOO | 73% | 1.7% | 68m | 462 |
| JetBlue AirwaysB6 | 73% | 1.9% | 104m | 2,006 |
| American AirlinesAA | 68% | 1.7% | 72m | 6,179 |
| Spirit AirlinesNKWorst | 52% | 4.0% | 76m | 152 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.