Airline

First checked bag

Second checked bag

Additional bags

Overweight bags

Oversized bags

Airtran

$15

$25

$50

51-70 lbs (23-32kgs):  $39

71 to 99 lbs: $79

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

Alaska

$0 ($15 eff. 7/7/2009)

(one way)

($25 eff. 7/7/2009)
(one way)

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

51-100 lbs: $50

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

American

$15

$25

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

$15

$25

$75 nonstop/$100 connecting

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

63 inches and over: $100

Delta

$15

$25 ($50 starting July 1)

Third bag: $125; Bags 4 to 10 $200 each (For travel outside US, no fee for 2nd bag, $200 for 3rd bag, $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

$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

First additional bag: $50; bags 3-9: $50; 10 and more: $110

51-70 lbs: $25; 71-100 lbs: $50

62-80 inches: $50

United

$20 ($5 discount if paid online)

$30 ($5 discount if paid online)

Bags 1-4: $125; 5th or more: $250

$100

63-115 inches: $125

US Airways

$20 at airport, $15 online

$30 at airport, $25 online

Bags 3-9: $100

51-70 lbs (23-32kgs): $70

71 to 99 lbs: $120

62-80 total linear inches: $100