Here's a look at American carriers, starting with the worst for overbooking and descending to the best:
- Spirit Airlines — 78 IDBs per million passengers.
- Frontier Airlines — 55.
- Southwest Airlines — 41.
- Alaska Airlines — 28.
- American Airlines — 24.
- United Airlines — 13.
- Delta Air Lines — 3.
- JetBlue Airways — 2.
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