Answer
A budget shuttle or transfer from Montevideo Airport to downtown costs around $1.50. This is the cheapest option after arrival if this format suits the passenger and they do not have much luggage.
For the first trip, it is important to understand the difference between a cheap public option and a more convenient taxi ride or individual transfer. At night, with children, several suitcases, or after a long flight, savings can be less important than straightforward logistics.
Carrasco Airport is located outside the center, so it is best to choose how to travel before leaving the terminal. A prepared address, cash or a card, and knowing the final stop help avoid overpaying or wasting time after landing.