| Airline | New Baggage Policy? | Date Policy Takes Effect | 1st Bag | 2nd Bag | 3rd Bag | Exemptions | Fine Print | Notes |
| AirTran | X | Thursday, May 15, 2008 | Free | $10 | $50 | AirTran Baggage Information | Through May 14, passengers will be allowed to check two bags Freeof charge. | |
| Alaska Air/Horizon Air | Free | Free | $50 | Alaska Baggage Policy | Passengers on flights within Alaska and to/from Guadalajara and Mexico City are allowed three checked bags at no cost. | |||
| American Airlines | X | Monday, May 12, 2008 | Free | $25 | $100 | Aadvantage Gold, Platinum and Executive Platinum level members; full-fare ticket holders in Economy, Business and First Class; travelers to international destinations outside the U.S., Canada and U.S. territories. | American Airlines Baggage Information | The new policy applies to tickets purchased on or after May 12, 2008. |
| Continental | X | Monday, May 05, 2008 | Free | $25 | $100 | OnePass Elite, SkyTeam Elite and Elite Plus members, Y class ticket holders, Continental Airlines Presidential Plus credit card holders, active duty military personnel. | Continental Baggage Information | Travelers with more than one bag to check may use curbside check-in. |
| Delta | X | Monday, May 05, 2008 | Free | $25 | $80 | Business Elite and first class ticket holders, active duty military personnel. | Delta Baggage Information | Passengers traveling to or from Key West and Marathon, Florida are limited to only one checked bag. |
| Frontier Airlines | Free | Free | $50 | Frontier Airlines Baggage Information | ||||
| go! | Free | Free | $25 | go! Baggage Information | ||||
| Hawaiian Airlines | Free | Free | $25 for interisland flights, $80 for all others | Hawaiian Air Baggage Information | This airline does not accept any baggage over 70lbs. | |||
| JetBlue | Free | Free | $50 | JetBlue Baggage Information | ||||
| Midwest Airlines | Free | Free | $100 | Midwest Airlines Baggage Policy | ||||
| Northwest | X | Monday, May 05, 2008 | Free | $25 | $100 | Northwest Airlines' Silver, Gold and Platinum WorldPerks® Elite customers, SkyTeam Elite customers and passengers booked in full fare classes (Y or B), first class ticket holders. | Northwest Baggage Information | |
| Southwest Airlines | Free | Free | $25 | Southwest Baggage Policy | ||||
| Spirit Airlines | $20 | $20 | $100 | See notes. | Spirit Airlines Baggage Information | Travelers who pre-pay online for checked bags will pay $10 per bag for up to two bags. | ||
| United Airlines | X | Monday, May 05, 2008 | Free | $25 | $100 | Mileage Plus and Star Alliance members with premium status, business and first class ticket holders. | United Baggage Policies | New policy applies to refundable and award travel economy class tickets. |
| US Airways | X | Monday, May 05, 2008 | Free | $25 | $100 | Dividend Miles Preferred members (Silver status and higher), Star Alliance Silver and Gold status members, unaccompanied minors, first class and Envoy ticketholders. | US Airways Baggage Information | Travelers with more than one bag to check cannot use curbside check-in. |
| Virgin America | Free | $10 | $50 | First class ticket holders are allowed two checked bags at no charge. | Virgin America Baggage Information |