Iran full airspace closure by 2026?

Platform comparison

Market context

No new escalation has emerged in the last 48 hours to justify a shift from the current 0% crowd-implied probability for a full Iranian airspace closure. Recent military friction, including US and Israeli strikes in early 2026 followed by Iranian retaliation, triggered temporary, partial shutdowns rather than a general ban; Iran closed only its western and central sectors while keeping the eastern corridor open, and previous NOTAMs lasted merely hours before lifting [1][3]. These historical precedents demonstrate that Tehran typically opts for targeted, precautionary restrictions during active hostilities rather than a blanket suspension of all commercial transit through the Tehran FIR, which is the specific threshold required for this market to resolve YES [2][4].

Traders should monitor official NOTAM issuances from Iran’s Ministry of Roads and Urban Development and any sudden declarations from the US or Israel regarding imminent large-scale military action, as these are the primary catalysts for a general closure [1][3]. The settlement window extends to August 2026, meaning the market remains sensitive to the summer diplomatic calendar and potential shifts in regional conflict intensity, yet no current schedule or announcement suggests an indefinite, total shutdown is imminent [2]. With the eastern corridor remaining open even during peak conflict in March 2026, the dependency for a qualifying event remains a significant escalation beyond current tactical exchanges [7].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.