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.

ENVOY · FLIGHT MQ 3546 LANDED 12:41 PM ET, ~7 MIN LATE · SCHEDULED TIME UNKNOWN

Tuesday, September 29

MQ 3546 · STL → BOS

took off 9:20 AM CT · landed 12:41 PM ET (scheduled time unknown)

Forecast issued Tue 10:00 PM ET · 12h after departure

Arrive at BOS more than 15 minutes late?

22% chance · ±0 pts −5 pts · 24h

HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.

What’s moving the odds

↑ This flight has been late 24% of the time recently

↑ MQ's recent on-time record

↑ Cloud base down to 600 ft, visibility down to 1.5 mi forecast at BOS that day

↓ Mostly benign weather forecast at STL

↓ Tuesdays in September are usually quieter than average

Weather at each end

STL (origin) Gusts9 kt Ceilingnone (clear) Visibility10+ mi Precipnone

BOS (destination) Gusts11 kt Ceiling600 ft Visibility1.5 mi Precip0.03 in

How this resolves

Yes if the gate arrival is more than 15 minutes after the scheduled arrival. Cancelled or diverted flights resolve N/A.

Every question here is display only — there is no betting or money involved. Gate times come from the airline; a cancellation resolves only the “Cancelled?” question, and a diversion voids the delay questions.

MQ 3546 · STL → BOS

Odds over time