Originally Posted by
Often1
Uber. Anywhere inside the Beltway to IAD is $80, includes tip. Likely cheaper than taxi. A car rental for 2 days will run you a good deal more and you do need to allow drop off time at IAD.
Not a bad deal from farther east but you have to consider that you can't schedule in advance (cars can take 10+ minutes to show up depending on your location) and also that there is sometimes surge pricing in effect..
Taxi fare from my home or office in NW DC to IAD using a pre-booked Washington Flyer cab usually is just over $60 including tip. In my experience Washington Flyer cabs are reliable, clean, and always have credit card readers.
For the OP, assuming this is a leisure trip on a budget I would take Supershuttle. My usual rule is leisure trip = Supershuttle, business trip = taxi.