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Compare the airlines on a route
Enter a route to see every airline that flies it with enough flights, side by side on the same metrics, from the same source.
Airlines on BNA → BOS
Every airline with at least 200 flights on this route, over the route's reporting period.
Republic Airways is clearly ahead of the rest on 3 of 4 rates; the other one is too close to call among Southwest Airlines, Delta Air Lines, and Republic Airways.
| Metric | Southwest Airlines | JetBlue | Delta Air Lines | Republic Airways |
|---|---|---|---|---|
| On-time arrival | 68.1% | 72.1% | 78.1% | 85.3% (best) |
| Cancellation rate · too close to call | 1.03% (best, but too close to call) | 1.93% | 1.14% (too close to call with the best) | 1.84% (too close to call with the best) |
| Severe delay (60+ min) | 9.4% | 12.2% | 11.9% | 5.6% (best) |
| Average arrival delay | 14 min | 14 min | 11 min | 0 min (best) |
| Median arrival delay | 3 min | -7 min | -11 min | -12 min (best) |
| Departure on-time | 65.4% | 70.5% | 76.9% | 85.4% (best) |
| Flights analyzed | 2,829 | 2,435 | 1,580 | 1,252 |
A check mark and green mark the best figure in a row (higher for on-time rates, lower for delays and cancellations) when it is clearly better than every other side’s: a two-proportion test against each, on that side’s flight count, at about 95% confidence. When it is not, the row says “too close to call” and a “≈” marks the sides that cannot be told apart from the best figure. Average and median delay carry no sample-error estimate here, so they are marked by the printed figure alone.
BNA → BOS (Nashville to Boston · 942 mi): July 2023 – July 2026. FlyerIntel keeps one total per airline for the route, not the dates each airline started or stopped flying it, so an airline that flew the route for only part of that time is measured over that part.
Source: FlyerIntel analysis of US DOT BTS data · Airlines with fewer than 200 flights on this route are left out.
Month by month
There is no month-by-month chart for these airlines. FlyerIntel keeps monthly figures for each route and for each airline across its whole network, but not for one airline on one route. The BNA → BOS route page shows the route’s own trend.