halfway point between ABQ, NM and San Antonio, Tx
The halfway point is Chester, Iowa.
A close halfway point between Atlanta, Georgia and San Antonio, Texas is Baton Rouge, Louisiana. However, the exact halfway point is actually Holden, Louisiana.
The halfway point between Sydney, Australia and Los Angeles, California is London, Kiribati. The closest major city that is roughly halfway is Honolulu, Hawaii.
The halfway point is Clinton, Oklahoma.
According to the Geographic Midpoint Calculator in the related link, the halfway point between San Antonio, Texas and Atlanta, Georgia is near Clayton, Louisiana.
Franklin, KY
That's quite a drive. The halfway point is the Arkansas/Missouri state line.
Moab, UT
Brownsville, TN
Slidell, LA
San Marcos, TX