BDL and OAK don't surprise me, but JAX does in that US Airways already offers service at a pretty decent price. Without going back and checking, I think US average fare was around $127.00 each way, so it's not like they're gougin customers on this route.
BDL is a different story, though. US' average one-way fare PHL-BDL is well over $200.00 each way (for a 196mile trip), so BDL-PHL seems like a natural. Southwest had already announced Saturday-only nonstop to OAK (hadn't they?) and that's often times an indicator that daily service will soon follow.
Between now and Oct. 31, HOU loses2 daily departures to AUS, 2 daily departures to SAT, 3 daily departures to MSY and 3 daily departures to DAL.
DAL is losing 1 daily departure to ABQ, 1 daily departure to LIT, 1 daily departure to MAF, 2 daily departures to OKC, 2 daily departures to TUL and 3 daily departures to HOU.
I've read (but not verified) that LAX-LAS is also losing 1 daily roundtrip.
Does anyone remember that article that came out about the time that Southwest announced it's second wave of flights out of PHL that said in ten years Southwest at PHL would likely have the same number of departures as Southwest has today at BWI? I think BWI currently has (or will soon have) 161 departures. It's taken 11 years for BWI to grow to 161 daily departures. That's about 15 newflights a year.
Yet six months after starting service to PHL, Southwest will be 25% of the way to 161 daily departures. I think PHL will wind up being Southwest's fastest growing city. It's not going to take 9 and a half more years for Southwest to get the gates and ticket counter space it needs to handle 160 daily departures at PHL.