I understand taxis don't have meters in Oaxaca about how much should the fare from the airport to Holiday Inn Express be.
Hi, this in Jon, we have a bed and breakfast that is located 1 block from the Holiday Inn and our guests pay about 40 pesos for the trip from the airport. The rates are standard and are posted at the airport. Otherwise, when traveling around town it is a good idea to always check in advance. For trips to the outlying areas plan on spending about 120 pesos (about $12) per hour for a driver and taxi.