UFC 331: Alexandre Pantoja vs. Joshua Van (Flyweight, Main Card) odds: Kalshi vs Polymarket
Sat, Sep 19, 2026, 5:00 PM ET · UFC fights · $360 traded in 24h across both venues.
Joshua Van: Kalshi 50¢ vs Polymarket 53¢, -2.5 pp
Mid prices. A price is the market's probability: 50¢ means 50%. The gap is Kalshi minus Polymarket in percentage points.
Two separate exchanges, two accounts. Links may carry a referral code, which never changes what is shown. Disclosures.
-2.25¢ per $1, after fees
Buy Joshua Van @ Kalshi 51¢, Alexandre Pantoja @ Polymarket 48¢
All outcomes
| Outcome | Kalshi bid / ask | Polymarket bid / ask | Gap |
|---|---|---|---|
| Joshua Van | 49¢ / 51¢ | 52¢ / 53¢ | -2.5 pp |
| Alexandre Pantoja | 48¢ / 49¢ | 47¢ / 48¢ | +1.0 pp |
Price history, last 3 days
How this is matched
Games are matched across the two exchanges by league, team codes and date. Polymarket prices come from its live order book, Kalshi from its public API. Refreshed every 45 seconds.
What this is not
Read-only. Nothing here places or routes orders and nothing is advice. Fees, slippage and the time it takes to move money between venues are not in these numbers.