Yes, Uber operates in Campbeltown Airport, but not directly as they have no licence to operate in Campbeltown Airport. They have partnered with a local taxi company to provide service. However, it's worth noting that Uber availability and pricing can vary depending on the time of day and demand in the area. You may also want to consider using other taxi providers or comparison websites like altCABS to ensure that you are getting the best possible price and service for your journey on your prebook cab rides.