I recently changed my entire plane trip for $4. I am still in shock at how cheap it was. I changed not only my return date but my leave date and seriously it was $4 (actually a little less I think it was around $3.80). Not to mention Southwest has cleverly kept themselves as one of the only airlines that isn't going to start charging a baggage fee (their commercials make me laugh). Anyways, Southwest #1 in my books.
Traveling on a plane with a baby.... I'll let you know how that goes. Needless to say I'm a little nervious about it.