Which service will you likely use?
An UberX car can pick you up in ~6 min.
Distance between Bath and Heathrow Airport is approx. 101.82 miles (163.86 km) with 109 min travel time.
This Uber estimate from Bath to Heathrow Airport
92 days ago.
Update the estimate to see the real-time airport transfer fare to Heathrow Airport with Uber in Bath.