When airline baggage surcharges first popped up several years ago, passengers were understandably outraged. Eventually the practice became commonplace, as more and more airlines charged customers to check their luggage.

Customers' grudging acceptance may be about to end. Delta Airlines recently announced that they are increasing their baggage fees. Previously, Delta's customers were charged $15 for the first bag and $25 for the second. Ah, those were the days! Now, passengers can expect to fork over $23 for the first bag and $32 for the second.

Adding insult to injury, Continental Airlines has announced that they too are increasing their baggage fees to match Delta's. In the aftermath of the announcement, Web searches on "baggage fee rates" and "delta baggage fees" both shot up into triple digits. Clearly, folks want to know just how much each airline charges, before booking their next trip.

We did a bit of research on the major carriers' official sites and came up with this handy list of what you can expect to pay for the privilege of checking your underwear and toothbrush. All fees are for non-refundable coach flights within the United States. Also, keep in mind that fees can be higher if you pay them at the airport vs. online. There are also other possible exceptions, depending on your frequent flyer status, etc. Isn't traveling fun? Bon voyage!

• Alaska Airlines: $15 for the first bag, $25 for the second
• American Airlines: $20 for the first bag and $30 for the second
• Continental Airlines: $23 for the first, $32 for the second
• Delta Airlines: $23 for the first, $32 for the second
• JetBlue Airlines: first bag free, second bag will cost you $30
• Northwest Airlines: first bag $23, second bag $32
• Southwest Airlines: two bags for free. Really
• United Airlines: when fees paid online, $15 for the first bag, and $25 for the second. When paid at the airport, $5 more for each bag
• Virgin America: $20 for the first, $20 for the second