Schedule: FAA flight plans.
SOUTHWEST · FLIGHT WN 3877
IN THE AIR (OFF 2:15 PM PT, ETA 5:08 PM MT)
Today
WN 3877 · SJC → DEN
took off 2:15 PM PT · expected to land 5:08 PM MT (scheduled 1:39 PM PT → 5:10 PM MT)
Forecast issued Tue 6:00 PM ET · 1h after departure
Odds over time
Arrive at DEN more than 15 minutes late?
20%
chance · ±0 pts
+10 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
80%
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15–30 min late
19%
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30 min–1 hour late
<1%
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1–2 hours late
0%
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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.