Tracked live by the FAA, but its flight plan was first seen after takeoff, so we don't know the scheduled time and can't say whether it's late.

TURKISH AIRLINES · FLIGHT TK 290 IN THE AIR (OFF 1:51 PM PT, ETA 11:20 AM +03) · SCHEDULED TIME UNKNOWN
Today

TK 290 · SFO → IST

took off 1:51 PM PT · expected to land 11:20 AM +03 (scheduled time unknown)
Forecast issued Mon 10:00 PM ET · 5h after departure

Odds over time

Arrive at IST more than 15 minutes late?
17% chance · ±3 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
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