Cheapest carts & vapes in O'Fallon, MO
Cheapest right now: Pineapple Jealousy | Cartridge | 1g at Missouri Wild Alchemy — $50 ($50 per gram)
9 comparable vape pens listings at 1 O'Fallon dispensaries · ranked per gram · updated Sep 23, 2026
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How O'Fallon vape pens prices compare
Every row above is priced per gram of oil, so a 0.5g cart can't look cheaper than a 1g one. That is the only way to compare a vape pens menu honestly: the smallest package is almost always the cheapest ticket price and almost never the best value.
- Typical O'Fallon price: $55 per gram (middle of $50–$82). That works out to about $192.50 an eighth.
- 100% of priced vape pens listings in O'Fallon publish a package size — the rest are excluded from this ranking rather than estimated.
More O'Fallon price data: cheapest weed in O'Fallon, cheap ounces, O'Fallon flower price index, O'Fallon deals.
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Prices come from licensed Missouri dispensary menus and change constantly. Confirm with the store before you travel. Adults 21+ only.