We're concluding a 3-week trip through Scandinavia by stopping over in Iceland for one night, to soak our travel-weary bodies in the Blue Lagoon before heading home ("we" = 2 adults and a 10-year-old). The stopover is less than 24 hours total, and our plan was to just stay close to the airport. We've toured Iceland in the past, so no need for any other sightseeing on this trip.
Since we'll be staying in the vicinity of the airport, I thought getting around via taxi would be cheap and easy. But I've just discovered that, even for such relatively short distances, taxi prices seem to be astronomical!
Question: Is it true that taxis are super expensive? Would it make more sense to rent a car for less than 24 hours?
We'll have three legs of transportation: KEF airport to Grindavik, where our Airbnb is / Grindavik to Blue Lagoon / Blue Lagoon back to KEF airport. For that last leg, Blue Lagoon has a shuttle, but the timing is not ideal for our needs (based on flight time).
Rental car for that short period is a bit over $200, but that still seems less than 3 separate taxi trips would cost. Are there other options I'm not thinking of? Our Airbnb is cancelable, if somehow it would open up other options to stay in the town of Keflavik, for instance.