This page has directions to help you find your way from Reus Airport to Salou. The journey time is about 20 minutes by car.
Turn left out of the airport entry road. Follow the road to the end and turn right onto the N-420. After about 3 minutes you'll come to a roundabout. Cross over the roundabout and carry on, on the N-420 until the next roundabout.
Next, turn left onto the C-14. Go straight for about 5 minutes, and straight over another roundabout, until you see the C-31b. A few seconds after taking this road you'll enter Salou.