The Beijing Capital Airport is a sprawling three terminal airfield with two separate metro stops. Each terminal is four stories and they are all interconnected by free trams. While a huge amount of international flights land in PEK, there are an increasingly large amount of domestic flights as well.
Websites like ctrip and elong, in addition to the well-adapted cits have made flights incredibly accessibly and affordable.
For example, right now I am researching flights to Taiyuan, a regional capital in which my friend works as a teacher. The city (of about 3 million people) is a few hours from Beijing by train and a bit over and hour by air. I'm seeing round trip ticket prices ranging from $25 USD to $60 USD from a variety of carriers.
Aside from visiting friends, and as far as domestic (semi-autonomous region) trips are concerned, I'm really curious about:
1: Tibet
and
2: Macau.
They say Macau is the Vegas of Asia. The pictures I've seen of the architecture seem to support that.

Veronica's mother, Mary, took advantage of the non-stop flight from newark being offered by Continental. My parents are coming into shanghai via Delta and then transferring.
For international travel, people have recommended I deal with a travel agent as they are able to get better deals than the websites. I'm looking into a short trip to one of the following and I'd like any thoughts or advice:
1: Thailand
2: Malaysia
3: Vietnam
4: Korea
5: Japan
6: Anything I'm missing?