October 15

Decided by

Yes if no flight departs RUH for at least 24 consecutive hours, with that period starting between market creation and the date, 11:59 PM ET.§1

Period starts late

A qualifying period may begin as late as the specified date, 11:59 PM ET, and end after it.§6

Pending 24 hours

If a no-departure period has not reached 24 consecutive hours by the date, the market stays open until a flight departs or 24 hours elapse.§7

Closure claims

Announcements, NOTAMs, airline cancellations or closure reports do not qualify on their own if FlightAware displays departures.§5

Any cause

A qualifying closure counts regardless of its cause.§8

Counted

Confirmed departures shown with an actual departure time; scheduled departures do not qualify.§4

Source

FlightAware, via the RUH airport page and the corresponding departures page.§3

Closes

Oct 16, 2026 · 03:59 UTC

Restated in plain words from the rules text. Each § opens the sentence it comes from; the rules text governs.

Shares = Yes minus No for each trader. Record counts every settled bet, including losses never cashed in. Polymarket's own contracts are left out.