UA1540United Airlines · TUS → DEN
live · 4m ago
Route confirmed United Airlines

UA1540 TucsonTUS · 05:15 DenverDEN · 08:12

UA1540 by United Airlines flies from Tucson (TUS) to Denver (DEN) for the Mon, Oct 26 departure.

Right nowEn route to Denver · off blocks 05:24 · 9 min late
En route

en route from TUS to DEN

In flightUA1540 · position estimated
TUSTucsonDENDenver
Estimated from the boards

Board estimate · the aircraft flying this number is still on an earlier leg of today’s trip.

⚖ UA1540 typically leaves +6 and lands −22. The air wins minutes back.
Typical gate push+6 minmedian posted departure
Typical arrival−22 minmedian over 8 operations
Wins back in air~28 minmedian gate push vs arrival · how planes make up time →

Where the minutes go

last 7 operations · gate push → arrival
0+30+60+90 min
10-26
+9 gate · −18 arrival
10-24
CANCELLED
10-23
+15 gate · −1 arrival
10-22
+6 gate · −24 arrival
10-21
+3 gate · −27 arrival
10-20
+0 gate · −25 arrival
10-19
+9 gate · −18 arrival

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

The last 30 days

arrival outcome per operation

median arrival −22 min · 1 cancelled · 9 operations tracked

The route today

live boards
TUSTucsonOn-time likelyTUS delay board →
DENDenverOn-time likelyDEN delay board →
TUS→DENevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample
49%Chance of 15+ min delay
2.6%Chance of cancellation
+13 minAvg hub delay right now

Driven mainly by DEN (Denver), currently flying LIFR (low instrument). For this route and airline, under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other Tucson to Denver flights today

same route · United Airlines
UA1327departs 05:30
UA5738departs 07:15
UA598departs 07:15
UA6096departs 09:00
UA1671departs 09:42
UA1656departs 09:45

If UA1540 is cancelled, these are the other United Airlines nonstop flights from Tucson to Denver on the same day, with scheduled departure times in TUS local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →

How UA1540 actually runs

Pro Flight Search has tracked every published board update for UA1540 across the TUS and DEN boards: schedule changes, gate pushes and actual clocks. Usually lands ~22 min early. Based on 8 confirmed landings · 8/8 within 15 min of schedule. Pushes back late but makes up time in the air.

The verdict above is that record speaking, so it reflects how UA1540 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocksaircraft

Board log

scheduled → actual, per operation
10-26TUS 05:15 05:24 (+9)DEN 08:12 07:54 (−18)
10-24CANCELLED
10-23TUS 05:15 05:30 (+15)DEN 08:12 08:11 (−1)
10-22TUS 05:15 05:21 (+6)DEN 08:12 07:48 (−24)
10-21TUS 05:15 05:18 (+3)DEN 08:12 07:45 (−27)
10-20TUS 05:15 (+0)DEN 08:12 07:47 (−25)
10-19TUS 05:15 05:24 (+9)DEN 08:12 07:54 (−18)
10-18TUS 05:15 05:14 (−1)DEN 08:12 07:45 (−27)
10-17TUS 05:15 05:18 (+3)DEN 08:12 07:50 (−22)

Aircraft

Recent tails: N63899, N37290, N77571, N68891.

Board clocks recorded as TUS and DEN published them.

Planning around UA1540? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — UA1540 Tucson to Denver on-time performance, measured from the TUS and DEN airport boards.

Canonical URL
https://proflightsearch.com/flight/UA1540
How we measure this →