BAGGAGE FEES

For one checked bag:

• Southwest Airlines and Jet Blue: $0
• Airtran, Alaska and Frontier: $15
• Spirit: $19
• Continental, Delta, Northwest, United and US Airways: $20, with a $5 discount for paying online.
• American: $20 (no online discount)

Charges for second checked bags:

• Southwest: $0
• Jetblue: $20
• Airtran, Alaska, Frontier and Spirit: $25
• Continental, Delta, Northwest, United and US Airways: $30, with a $5 discount if paid online.
• American: $30

Charges for third checked bags:

• Southwest: $25
• Airtran and Frontier: $50
• Jet Blue: $75
• Continental: $75 for nonstop flights and $100 for connecting flights.
• Alaska, US Airways, Spirit and American: $100
• Delta, United and Northwest $125

Overweight and Oversized Luggage

From there it really gets complicated. Additional bags can cost $200 or more at some airlines. Overweight and oversized bags carry their own fees. International flights may have different luggage rates. Frequent flyers may get luggage discounts on some airlines.