So. Decided to join Delta Skymiles and see if they are better than Aadvantage. Here's how that went...I got 100,000 miles for the credit cards I opened, my husband got 30,000 for his. Their website says a o/w low mileage to Europe from the U.S. is 30,000 each way. I checked every date for next summer and every city combination and even though their advertised mileage calendar says that low miles = 30,000, and when I go to put in a certain date, that date is also advertised/listed as 'low miles', it is NEVER 30,000. Not even close. And, their online booking tool doesn't allow o/w anyway! I called four Delta/Skymiles reps, none of them could find a low miles city/date combo either. One even told me, "To be honest, that mileage chart is just a guide"! Also, until 2 days ago, they listed a mileage buy promo to receive 50% more in miles you buy, until Sept. 30. Now, promo has disappeared and none of their reps seem to know anything about it! I used their pricey 'Pay with Miles' to get two r/t from ORD-MXP and home from MAD-ORD for over $1700 and 100,000 Skymiles COACH, and not from my home airport. So sorry, American, I'll never leave you again. Any suggestions, anyone?