Lot 3

Five-minute walk to both ONT terminals, one shared lot

Lot 3 sits between T2 and T4 at Ontario International, about a 5-minute walk to either terminal. Daily parking runs $25 per day, so it undercuts the front-of-terminal garages but still keeps you fully on-airport. If you’ve got one person on Southwest in T4 and another on Alaska or Delta in T2, this is the one lot that reasonably serves everyone.

This is an uncovered, long-stay surface lot, signed as Lot 3 on the airport’s main drive between T2 and T4. ONT lists it as a long-term option, and people on Google mention leaving cars here for several days without issues at the posted $25 daily rate. Walking time from the middle rows to either terminal entrance clocks in at around 4–6 minutes, depending on bags and kids.

Placement is dead-center: if you park in the middle sections, the walk to T2 or T4 feels roughly the same. Regulars say they park near the crosswalks, then pick their route based on security wait times shown in the ONT app for T2 vs T4. Rows along the T4 side are a touch closer for Southwest and Frontier; rows toward T2 shave a minute for Alaska, Delta, and American.

Watch out for the back rows along the far edge of Lot 3, where multiple reviews describe the area as “dark” late at night. If you’re arriving after 22:00, aim for spaces closer to the main entry lane and the terminal-facing side for better lighting and more foot traffic. The lot can also tighten up on Sunday evenings and Monday mornings, so expect a few extra minutes circling for a spot.

Tip: take a quick photo of the nearest “Lot 3 Row” marker plus the terminal sign (T2 or T4) so finding your car on the return walk only takes 2–3 minutes.