Tracked live by the FAA. The scheduled times shown are from a typical Tuesday because the FAA's flight plan was first seen after takeoff.
UNITED · FLIGHT UA 2173
IN THE AIR (OFF 3:03 PM MT, ETA 4:32 PM MT)
Today
UA 2173 · BOI → DEN
took off 3:03 PM MT · expected to land 4:32 PM MT (scheduled 2:40 PM MT → 4:39 PM MT)
Forecast issued Tue 3:00 PM ET · 2h before departure
Odds over time
Arrive at DEN more than 15 minutes late?
9%
chance · ±0 pts
−17 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
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How late will it get to DEN?
LIVE
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On time or early
91%
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15–30 min late
9%
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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.