Taxi fares from Airport to Ixlauacan

[J.Miller]

Please excuse the spelling of Ixlauacan because I am sure that it is not right but it does not affect my question! My sister and brother in law are coming in on Thursday at the same time as I have to be someplace else. Their house is in Ixlauacan and I am wondering if they wouldn't be more comfortable going straight to their own home by taxi and wait for me there until I can get away to pick them up and take them out for lunch. Can anyone give me an approximation on the cost for them to take a taxi from the airport?