GameStop offers Call of Duty: Infinite Warfare for PlayStation 4, Xbox One, or Windows for $39.99 with free shipping. (Amazon charges the same with free shipping for Prime.) That's the lowest total price we could find by $14 and the best outright price we've seen. (We previously saw it for $60 bundled with a $25 Dell gift card three weeks ago.)
Update: As reader found, Newegg offers the PlayStation 4 version for $34.99 with free shipping.