Yes, you can smoke at Ontario International Airport (ONT) in the designated outdoor areas on the lower level (arrivals) outside both Terminal 2 and Terminal 4. The terminals are smoke-free indoors, so smokers head to the marked curbside areas with ashtrays near the entrance doors.
Smoking Policy at Ontario International Airport
Smoking is not allowed anywhere inside the terminals — not at the gates, ticketing counters, food courts, or baggage claim areas. Outdoors, stand well clear of building entrances, doorways, and operable windows to smoke; airport security enforces this. Designated smoking areas with ashtrays are located on the lower level (arrivals side) of both terminals. Look for the signage near the curbside exits.
How Ontario Airport Is Laid Out
ONT has two terminal buildings: Terminal 2 and Terminal 4. The numbering skips — the old Terminals 1 and 3 were demolished when the airport was reconfigured. Terminal 2 handles several airlines and has its own TSA checkpoint, while Terminal 4 is the larger building with more gates and additional carriers. The two terminals are connected by a pedestrian walkway on the upper level. Each terminal has its own arrivals area on the lower level.
Terminal 2
Smoking areas: No indoor smoking. Designated outdoor smoking areas are on the lower level (arrivals) outside Terminal 2, marked with ashtrays and signage near the entrance doors.
After security: No smoking areas available.
Terminal 4
Smoking areas: Same as Terminal 2 — smoke-free indoors, with designated outdoor areas on the lower level. Terminal 4 is the larger building, so the walk from the farthest gate to the outside exit takes a bit longer.
After security: No smoking areas available.
E-Cigarettes and Vaping
Vaping is treated the same as smoking at ONT. E-cigarettes and vape devices are not permitted inside either terminal — use the same outdoor designated areas on the lower level as cigarette smokers.
Summary
| Area | Smoking Allowed | Location Details |
|---|---|---|
| Inside terminal | No | Smoke-free throughout both buildings |
| Terminal 2 | No | No post-security smoking |
| Terminal 4 | No | No post-security smoking |
| Outside – lower level (T2) | Yes | Designated areas away from entrances |
| Outside – lower level (T4) | Yes | Designated areas away from entrances |
| Vaping/e-cigarettes | Outdoor only | Same rules as traditional cigarettes |
For USA airport smoking rules, state vape rules, lighter rules at TSA, and other federal/state info, see our USA smoking guide.