Iran full airspace closure by 2026?

Platform comparison

Market context

Iran’s airspace remains open to commercial overflights today, with no general closure in place since the partial reopening in June 2026 following the March 2026 shutdown triggered by US and Israeli strikes [3]. Historical precedents show that full closures are rare and typically short-lived: a five-hour shutdown occurred in January 2026 amid rising US tensions, while the 12-day Israel–Iran conflict in mid-2025 saw only central and western airspace restricted, not the entire Tehran FIR [4][7]. The current 0% crowd-implied probability on Polymarket reflects this pattern—general closures have consistently been temporary, partial, or tied to specific military escalations rather than sustained policy shifts [1][3].

Traders should monitor official NOTAMs from Iran’s civil aviation authority and FAA advisories, particularly any new prohibitions on US civil aviation in the Tehran FIR, which currently extend to October 2027 [3]. Key catalysts include announcements of renewed missile or drone retaliation, scheduled US–Israeli military exercises, or diplomatic breakthroughs that could alter regional risk assessments [1][3]. A qualifying closure would require a blanket suspension applicable to all commercial flights across the entire Tehran FIR, not limited cancellations or partial restrictions [1]. Recent extensions of airspace closures in February 2026, linked to pre-emptive Israeli strikes, underscore how quickly conditions can shift during active conflict [6].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Iran full airspace closure by 2026? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Kalshi UK. 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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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 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.