Earning those Frequent Flyer MIles

I have been to Europe 10 times, 7 of those trips in free seats from Frequent Flyer Miles.  I tend to hoard the miles for those trips, though I will occasionally use miles for domestic flights.  I am a member of three major frequent flyer programs, Delta, American and United, a couple of them are in alliances that allow me to earn miles for flying on other airlines such as Alaska.  Most of my miles are on Delta or American.  I also have airline branded credit cards for two of these.  I earn miles on all dollars spent on those cards and receive free checked bags and priority boarding on those two airlines.  

Last Friday I was earning my miles.  I flew from Orlando to DC, on American.  Went home to the condo for two hours, did laundry, paid the bills, checked the mail, retrieved packages that arrived while I was out of town, went to the gym, took a shower, packed, dressed and went back to the airport.  I then flew on Delta to Lexington to visit Jay for the long weekend.  That is one of the craziest days of flying I have ever had.  It is also a couple of thousand miles earned, on two different airlines.  That much closer to the next European adventure.   

London, Ireland, or Spain for the next trip?