UA4540United Airlines · CHA → ORD
live · 51m ago
Route confirmed United Airlines

UA4540 ChattanoogaCHA ChicagoORD · 06:59

UA4540 by United Airlines flies from Chattanooga (CHA) to Chicago (ORD) for the Sat, Oct 24 departure.

Right nowLanded in Chicago · today
06:55

arrived at ORD · 4 min early

Typical arrival+0 minmedian over 15 operations
Cancellation0 in 15tracked operations · cancellation odds calculator →

Where the minutes go

last 7 operations · gate push → arrival
0+30+60+90 min
10-24
−4 arrival
10-23
+0 arrival
10-22
−7 arrival
10-21
−25 arrival
10-20
−22 arrival
10-19
−17 arrival
10-18
−19 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 +0 min · 0 cancelled · 15 operations tracked

The route today

live boards
CHAChattanoogaOn-time likelyCHA delay board →
ORDChicagoOn-time likelyORD delay board →
CHA→ORDevery carrier, schedules and on-time historyRoute intelligence →

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.

How UA4540 actually runs

Pro Flight Search has tracked every published board update for UA4540 across the CHA and ORD boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 14 confirmed landings · 11/14 within 15 min of schedule.

The verdict above is that record speaking, so it reflects how UA4540 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocks

Board log

scheduled → actual, per operation
10-24CHA ORD 06:59 06:55 (−4)
10-23CHA ORD 06:59 (+0)
10-22CHA ORD 06:59 06:52 (−7)
10-21CHA ORD 06:59 06:34 (−25)
10-20CHA ORD 06:59 06:37 (−22)
10-19CHA ORD 06:59 06:42 (−17)
10-18CHA ORD 06:59 06:40 (−19)
10-17CHA ORD 06:59 08:24 (+85)
10-16CHA ORD 06:59 07:16 (+17)
10-15CHA ORD 06:59 07:05 (+6)
10-14CHA ORD 06:59 07:08 (+9)
10-13CHA ORD 06:59 06:53 (−6)
10-12CHA ORD 06:59 07:34 (+35)
10-11CHA ORD 06:59 07:09 (+10)
10-10CHA ORD 06:59 07:49 (+50)

Board clocks recorded as CHA and ORD published them.

Planning around UA4540? 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 — UA4540 Chattanooga to Chicago on-time performance, measured from the CHA and ORD airport boards.

Canonical URL
https://proflightsearch.com/flight/UA4540
How we measure this →