Parking at Dulles (IAD) ranges roughly from the low teens per day in Economy to over thirty dollars per day at the Terminal lot, with cheaper off-site options nearby.

Below is a clear breakdown plus some quick tips.

On-airport parking rates (typical drive-up)

These are the standard published ranges for parking directly at Washington Dulles International Airport.

[7][9][3] [5][1][3][7] [1][3] [3] [1][3]
Parking option Best for Typical rate Notes
Economy Lot Budget long‑term About $12–15 per day (often around $14) Cheapest on‑airport option; shuttle to terminal included.
Garage 1 & 2 Long‑term, closer About $17–21 per day Covered parking, walk or shuttle; sometimes discounted to ~$17/day with advance reservation.
Terminal Lot Walkable convenience About $27–32 per day Closest standard self‑park to the terminal.
Valet Premium convenience Up to about $39 per day Drop at terminal, highest price tier.
Hourly short‑term (Terminal / Garages) Pickups & drop‑offs About $6–7 per hour Useful for quick stays; hits daily max if you stay long.

For a simple mental check: think “around $14 for Economy, around $20 for a garage, low $30s at the terminal, and high $30s for valet.”

Cheaper off-site parking near Dulles

If you don’t need to park right at the terminal, off-site lots and hotel packages can be much cheaper.

  • Many third‑party lots run around $5–7 per day and include a free shuttle.
  • Some nearby hotels sell “park & fly” spots for just a few dollars a day via aggregator sites.
  • Community tips often suggest using apps or booking hotel lots instead of drive‑up airport rates to save a significant amount on trips of a week or more.

A quick example: for a 7‑day trip, Economy on-airport at roughly $14/day is about $98, while an off‑site lot at roughly $6/day is about $42—often less than half the price.

Small “gotchas” and tips

  • Reserve if you can: advance reservations sometimes knock a few dollars per day off garage pricing (e.g., bringing it down near $17/day).
  • Economy vs short‑term: once you’re past roughly 2–3 hours, Economy’s daily rate is usually cheaper than continuing to pay hourly at the Terminal or Garages.
  • Rates change: airport authorities can adjust rates, and some sites note that all prices are subject to change, so it’s wise to check the official Dulles parking page right before your trip.

TL;DR:
If you just want the cheapest on‑site option, aim for the Economy Lot (about mid‑teens per day) ; if you want to walk from your car to the terminal, expect around low‑30s per day at the Terminal lot, and if you’re willing to shuttle from an off‑site lot you can often get around $5–7 per day.

Information gathered from public forums or data available on the internet and portrayed here.