On peak weeks, TUS opens the Overflow Parking Lot
When the Main Terminal garages and lots at Tucson International Airport fill up around holidays or major events, airport staff start directing cars into the Overflow Parking Lot, a surface lot set aside for spillover demand. It’s on airport property near the terminal roads, but it’s not advertised as a primary parking choice on the official TUS parking page.
Pricing from the airport lists the daily rate at $0.00, which usually means the lot is either temporarily free during certain activations or not in regular paid rotation. Treat that number as a flag that this is a contingency option, not something you can count on booking in advance like the main Main Terminal parking products at TUS.
The Overflow Parking Lot is a basic surface lot with standard outdoor spaces, unlike the covered garage near the Main Terminal. Don’t plan on shade structures, premium shuttle branding, or pre-booking; think gravel or asphalt spillover that opens only when other TUS lots are nearing capacity and airport staff need extra space.
There are no published hours, prepayment options, or reservation tools tied specifically to the Overflow Parking Lot on flytucson.com. In practice, that means you generally follow electronic signs and staff directions on airport roads near the Main Terminal, and you pay (if applicable) via the same on-site machines or exit booths used across other TUS parking areas.
Practical tip: check the official TUS parking page for real-time status of the main lots before you leave home. If everything around the Main Terminal shows “lot full” during a busy weekend or holiday, budget an extra 10–15 minutes for possible detours into the Overflow Parking Lot and a slightly longer walk or wait for a shuttle back to the terminal.