Andahuaylas is in the department of Apurimac. The population is roughly estimated at 30,000. The altitude is about 2,926 m above sea level. The surrounding mountains provide beautiful scenery.
Combis and buses are available from Abancay, ~4 hours.
The airport of Andahuaylas has two daily flights from LCPerú. The airport is actually located in Huancabamba. A shared taxi from the airport to Andahuaylas costs 10 soles and takes 45 mins to an hour.
Andahualas is a very long town, spread out along the river. If you're coming from Ayacucho, don't be concerned if it drops people off in what looks like the center of town, and the bus continues beyond. You'll soon reach the bus terminal, which is actually closer to the real center of town.
No big problem. Distances are small, just walk. If you need a taxi, don't pay more than 3 Soles ($1 US) in the city. Mototaxis (tuk-tuks) are even cheaper.
Collectivo (shared) taxis run from Talavera to Andahuaylas to San Jeronimo on the main streets, leaving from the plazas. You can also wave one down in the street. Cost is 1 Sol per person.
The Laguna de Pacucha, at 3,300m is easy to reach during the day. Take a colectivo (3 Soles) or a taxi. Both leave from the same place at the top of the market (ferria). The colectivos run via the village of Pucucha up to the head of the lake (40 minutes). From here, it's a 7 km walk to the ruins of Sondor from the Chanca era. Look for the sign for Sondor on the left side of the lake. If it has been raining, be prepared for a lot of mud. Or take a combi (1-2 sol); the combi drops you off (and returns from)the beginning of the road uphill to Sondor (the smaller, upper road on the left) -- a 15-20 min walk up hill to the entrance to the archeological site (2 soles). Beautiful ruins; spectacular views of the mountains. If you have enough time, walk back to Pacucha on the other side of the laguna (2.30h). It's a beautiful stroll (all flat) and the villagers are quite friendly. The village gives a good impression of campesinos 's life. But be sure to reach Pucucha before dark, otherwise it's going to be difficult to find a colectivo or taxi back to Andahuaylas.
Luxury combis (minivans) leave for Abancay approximately six times a day for 15 Soles. There are several companies operating this trip, some based out of the bus terminal, one at the base of Jr. Juan Talleres. Don't believe them that it only takes 3 1/2 hours - inevitably there are delays, making the trip 5 hours. Beautiful scenery through a series of hairpin turns and switchbacks.
There are about 10 combis a day leaving for Ayacucho that cost 30 soles. The schedules seem to change once in a while, so be sure to check with the offices lined along Avenida Confraternidad, across the street from the bus station.