You might keep a few spare tubes, tire irons and a floor pump at both work and home. That way the worst case will be a 1.5 mile walk.

Changing a tube on the road, perhaps in bad light or rain or on the side of a busy highway or with a difficult-to-use mini-pump or difficult-to-remove tire can be no fun. Even if you do have a pump and spare tube on the bike you might choose to walk the bike to work or your home and do the repair under better conditions.