JM from Central Florida on 7/23/2020 2:57:13 PM:
I had the same challenge last week. I rented a mid-sized SUV from Hertz at Reagan National and dropped it off at Hertz, 1318 Fifth Ave., Pittsburgh, which is a mile and a half from Point State Park. Cost with taxes was $121. My rental was a Toyota Highlander, which is perfect for 1-2 bikes/bikers, but might be tight for 3. When I made my reservation, Hertz had larger minivans for one-way rental at the same price. National Airport is easily accessible by bike if you cross the Key Bridge to Virginia and follow the Mount Vernon trail. There is a paved connection from the trail to the airport. When you get into the airport proper, follow signs directing you to bicycle parking/racks, but just before the racks, turn right through the rental car maintenance area and ask the guys working there how to get to rental car pickup. I rode my bike directly to the rental car counter without the need to store my bike or take a bus. Easy to do if you ask directions. Have fun.