Airline baggage fees chart, updated

Airline

First checked bag

Second checked bag

Additional bags

Overweight bags

Oversized bags

Airtran

 $0 $15

 $10 paid online, $20 at airport $25

 $50

 51-70 lbs (23-32kgs): $29 $39

71 to 99 lbs: $69 $79

62-70 total linear inches: $29 $39; 71-80 inches $69 $79

Alaska

 $0 ($15 eff. 7/1/2009)

 $0 $25

3rd-6th bags: $100; 7th or more: $150

51-100 lbs: $50

 63-80 inches: $50; 81-115 inches: $75

American

 $20 or $25 for tickets bought after Feb 1; ($15 to/from Canada)

 $30 or $35 for tickets bought after Feb 1 ($25 to/from Canada)

Bags 3-5: $100; 6th or more: $200

51-70 lbs (23-32kgs): $50; 71-100 lbs: $100. These fees may be higher on international routes

63 inches and over: $150

Continental

 $23 ($2 more if not paid online)

 $32 ($3 more if not paid online)

 $75 nonstop/$100 connecting

51-70 lbs (23-32kgs): $50
Over 70 lbs not accepted.

63 inches and over: $100

Delta

 $23 ($2 more if not paid online)

$32 ($3 more if not paid online) $50 for European travel

For travel within the US and Canada: Third bag: $125; Bags 4 to 10 $200 each;  For travel to Europe: no charge for first bag, $50 for second; $200 for 3rd,  $350 for 4th and 5th, $600 for bags 6-10).

51-70 lbs (23-32kgs): $90 ($150 for travel outside US)
71 to 100 lbs: $175 ($300 each outside US)

 63-80 total linear inches: $150 $175

Frontier

 $0 $15

 $25

 $50

51-100 lbs:    $75

63-80 inches: $75 

JetBlue

 $0

 $20

 $75

51-70 lbs: $50; 71-99 lbs: $100

63-80 inches: $75

Northwest

 See Delta

 See Delta

 See Delta

 See Delta

See Delta

Spirit

$19 paid online ($25 if paid at airport)

$25 (online or at airport)

Bags 3-5: $100 (online or at airport)

51-70 lbs: $50

71 to 99 lbs: $100

62-79 inches: $100; 80 inches and over: $150 

Southwest

 $0

$0

3-9: $50; 10 and more: $110

51 -100 lbs: $50

62-80 inches: $50

United

 $25  ($2 discount if paid online)

 $35 ($3 discount if paid online)

 Bags 1-4: $125; 5th or more: $250

 $100

63-115 inches: $125

US Airways

$25 at airport, $23 online

 $35 at airport, $32 online, $50, online, to Europe ($55 at airport)

 Bags 3-9: $100

 51-70 lbs (23-32kgs): $70

71 to 99 lbs: $120

 62-80 total linear inches: $100

Virgin America

$20 (up to 70 pounds)

$20 (up to 50 lbs)

Bags 3-10 $20

51-70 lbs $50; 71-100 lbs $100

$50 (63-80 linear inches)