YES means 30+ min arrival delay or flight cancellation/diversion, while NO means on-time arrival. Flightstats.com is used as a data source to resolve this market. Track flight arrival here: https://app.wingman.wtf/market/0x3de16c8ff2e5eebc804225ab3059c5a0178817db?utm_source=manifold&utm_medium=manifold&utm_campaign=manifold