It is a known fact that Airport parking can be pretty expensive for short term parking also for long term parking. Some airports charge $25 or more per day to park & few airports charge hourly which can be expensive if charged for a long term parking for few days or weeks and it is doubtful that you can find an any alternates to commute to Airport as it could be also expensive.
There are the best ways to save money on airport parking as these options are not expensive. If you have an option to travel by bus which could be the most cheapest way to commute to the Airport. However, most travelers do not have the option to travel by bus as travelling by car could be the only option.
The other option would be to call a cab if the person is travelling alone which could not be an option if travelling with family or even going for a vacation as there could be plenty of bags which cannot fit in a cab. If the trip is planned in advance the best option to save is by driving to the Airport & to park with Cheap Airport Parking IAD.
As these parking lots are closer to Airport with Free Shuttle Service available for drops & the best part of these parking places are that they are 70% cheaper to the original Airport Parking.
One of the best IAD Airport Parking are available with Book2park which provides the cheapest rates available.