Excess baggage calculator
Southwest Airlines excess baggage fees
Southwest Airlines charges by the piece — a flat overweight fee once a bag passes the weight limit (usually 23 kg), plus a separate fee for each bag beyond your allowance.
| Route | Excess / overweight fee |
|---|---|
| U.S. Mainland (tickets booked on/after Apr 9, 2026) | 23–32 kg: $100 · 32–45 kg: $200 · extra bag $150 |
From Southwest Airlines's published rates, checked 2026-07-24 ·verify on their site · Estimate, not a quote — fees vary by exact route, fare and where you pay, and airlines revise them without notice.
Estimate your Southwest Airlines fee
1 bag