STS car rental

Charles M. Schulz Sonoma County Airport. 5 on-airport branches. Off-airport lots are often cheaper; the search shows the full total for each.

Search STS

Pick dates and your age to see every option and the real total.

Companies and age rules

At age 21

Hertz
Minimum age 20 · 1 branch in California
Rents at 21· unverified
Young-driver fee: $19/day
Estimate — from Hertz policy page, verify at booking · hertz.com · checked 2026-10-19 · all Hertz rules
Avis
Minimum age 21 · 1 branch in California
Rents at 21· unverified
Young-driver fee: amount not published
Source: avis.com · checked 2026-10-19 · all Avis rules
Budget
Minimum age 21 · 1 branch in California
Rents at 21· unverified
Young-driver fee: amount not published
Source: budget.com · checked 2026-10-19 · all Budget rules
Enterprise
Minimum age 21 · 1 branch in California
Rents at 21· unverified
Young-driver fee: amount not published
Source: enterprise.com · checked 2026-10-19 · all Enterprise rules
National
Minimum age 21 · 1 branch in California
Rents at 21· unverified
Young-driver fee: amount not published
Source: nationalcar.com · checked 2026-10-19 · all National rules