Tour agencies
As mentioned before in Armenia you will observe more than 5,000 cultural monuments dating to the 2nd millennium BC most of which are inscribed in the UNESCO World Heritage list. Tour agencies in Armenia do not have big history but in a short time they have developed very interesting tour packages and high quality service.
We would like to share some information about tour agencies that will be happy to help you to discover ARMENIA. There are many agencies operating in Armenia but we will bring to your attention only those that have web pages and thus are easier to communicate. One of the traditional tour agencies is "Armen Tour" they are offering full package of services.
Other company that we would recommend is "Sidon-Travel". As was written on their web "Since 1985, Sidon Travel & Tourism has had the privilege to organize tours to visit the countries of Armenia, Russia & Karabagh for our clients.
Our Group Tours provide an opportunity to take a professionally-organized, worry-free, entertaining and informative trip, while meeting fellow Armenians from across the U.S. Create memories and friendships to last a lifetime." Their services include Airfare, Quality Hotels, Meals, Guided Daily Excursions, Transfers, Medical Insurance.
"Elitar" Travel Company also should be considered. They also provide high quality service and except above mentioned they also provide "Seasonal Tours", "Daily short Tours" and also some special offers like watching Football Match Armenia-Spain 2009.
Very interesting section is presented on "Menua Tour" agencies web that is opinions of clients where you can see comments of customers. This will give you idea about services offered and their quality.

TATEV-T.T.T. agency, founded in 1992, is an experienced company which organizes different interesting tours to sightseeing of the RA, helps foreign businessmen to make their business-trips easy, makes appointments with potential business partners and solves any problems connected with visit and stay in RA.
For travelers from US and non European countries there are no direct flights to Armenia so You should do a little research to find out the ways of transportation. I'm not sure but I guess all above mentioned aircraft companies have their offices around the world and maybe contacting with them will solve the small problem, which I'm sure wouldn't stop you from visiting Armenia.