Schedule: FAA flight plans.
SOUTHWEST · FLIGHT WN 4231
IN THE AIR (OFF 3:21 PM MT, ETA 4:48 PM MT)
Today
WN 4231 · BOI → DEN
took off 3:21 PM MT · expected to land 4:48 PM MT (scheduled 2:20 PM MT → 4:22 PM MT)
Forecast issued Sat 4:00 PM ET · 0h before departure
Odds over time
Arrive at DEN more than 15 minutes late?
97%
chance · ±0 pts
– · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
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How late will it get to DEN?
LIVE
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On time or early
3%
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15–30 min late
30%
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30 min–1 hour late
67%
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1–2 hours late
<1%
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Over 2 hours late
0%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%; while it’s in the air they come from the FAA’s arrival estimate.