Two more airlines are charging for your first checked bag. Continental began charging $15 last month and Delta will begin imposing the same fee as of December 5th as part of its merger with Northwest.

I suppose we can’t blame them for keeping pace with the new trend but I’ve personally noticed that planes are more crowded than ever due to passengers cramming as much as they can into carry-ons.

As it stands, the only domestic airlines not charging for your first checked bag are Jetblue, Virgin America, Southwest, Midwest, Alaska Airlines and Airtran. How long before another one bites the dust? You can keep up with the latest round of fees on Smarter Living’s Ultimate Guide to Airline Fees.