We are also using my United miles to head back from Europe. I'm a million miler flyer on United.
It's been awhile since I have posted (although I expressed interest in a post about poker earlier this week). It will be me (turing 50 in April!), DW, Marci (she'll be 45 just after this trip), and DD, Alyssa (5).
The only think that was a surprise for me using miles was that you have to pay the taxes on flights out of the US. The taxes are determined by what country you are flying out of. It turned out the UK and Germany were the most expensive, but I believe Spain, Portugal - even Luxembourg were quite cheap - around $50pp. My wife's heritage is in Germany, so we are flying there the day we disembark, and will be flying out of Germany a few days later (Frankfurt). The taxes added up to just under $400 for the three of us, but well less than the $1500pp I was finding to get us home!
We're flying Southwest from Denver the night before - cheapest option for us (it's actually more that what I paid for the trip back). I'm a little nervous about Southwest, but United's fares just aren't competive down there right now, which is odd since both Denver and Houston are hubs for them. I could have gone to Austin or San Antonio for about the same price, but then would have to rent a car, so that wasn't feasible either. We're taking the DCL transportation from Hobby on Saturday morning.
Chuck