UA504
Leg 1 EWR
Newark
1h 13m
IAD
Washington
5:55 AM EDT
sched 6:00 AM
Gate C105
7:08 AM EDT
sched 7:22 AM
Gate C27
14m earlyBoeing 737 MAX 8 · N27283
Arrived
June 6, 2026
2026 Run — Final Results
7 hubs · 6 flights · 3,788 miles in 20h 28m
The middle of the day came apart — a maintenance aircraft swap, then delay chasing delay from Chicago to Denver. Across the six legs, 545 minutes of delays piled up. The run still landed in San Francisco just 26 minutes behind a 20-hour plan — a schedule built to absorb exactly this kind of day.
20h 28m
Actual time
20h 2m
Planned time
26 min
Over plan
545 min
Cumulative delays
Flight-by-flight
All times local. Scheduled vs. actual with United's published delay reasons.
UA1775
Leg 2 IAD
Washington
2h 20m
ORD
Chicago
10:20 AM EDT
sched 8:15 AM
Gate D19
11:40 AM CDT
sched 9:36 AM
Gate B10
+124mAirbus A321neo · N24542
Arrived
Delay reason (per United)
Aircraft maintenance
Your flight departed late because of a maintenance issue on your original plane that required a change to another aircraft to get you on your way. Your safety is our priority and we're sorry for the inconvenience.
UA723
Leg 3 ORD
Chicago
2h 59m
IAH
Houston
12:55 PM CDT
sched 10:30 AM
Gate B10
3:54 PM CDT
sched 1:28 PM
Gate C45
+146mAirbus A321neo · N24542
Arrived
Delay reason (per United)
Late aircraft
Your flight departed late because an earlier delay impacted your plane's arrival. We value your time and we're sorry for the inconvenience.
UA1246
Leg 4 IAH
Houston
2h 33m
DEN
Denver
5:26 PM CDT
sched 3:00 PM
Gate C45
6:59 PM MDT
sched 4:44 PM
Gate B31
+135mAirbus A321neo · N24542
Arrived
Delay reason (per United)
Boarding delay
Your flight departed late because our boarding process took longer than expected. We value your time and we're sorry for the inconvenience.
UA2240
Leg 5 DEN
Denver
2h 26m
LAX
Los Angeles
7:33 PM MDT
sched 5:25 PM
Gate B29
8:59 PM PDT
sched 7:00 PM
Gate 71B
+119mBoeing 737-900ER · N69888
Arrived
Delay reason (per United)
Connecting customers
Your flight departed late because we waited for a few customers with a tight connection. We value your time and we're sorry for the inconvenience.
UA2056
Leg 6 LAX
Los Angeles
1h 14m
SFO
San Francisco
10:09 PM PDT
sched 9:34 PM
Gate 71A
11:23 PM PDT
sched 11:02 PM
Gate E2
+21mBoeing 737-800 · N76503
Arrived
Delay reason (per United)
Connecting customers
Your flight departed late because we waited for a few customers with a tight connection. We value your time and we're sorry for the inconvenience.
The N24542 cascade
Legs 2, 3, and 4 all operated on the same airframe: N24542, an Airbus A321neo. United's records show leg 2 (UA1775 IAD→ORD) required an aircraft swap due to a maintenance issue on the original plane. N24542 was the replacement.
Leg 3 (UA723 ORD→IAH) then inherited a "late aircraft" delay: the swapped-in plane arrived too late for the next departure's minimum service time. The cause-and-effect chain is visible directly in United's published delay codes.
By legs 4–6, United's published delay reasons shifted to "boarding delay" and then "connecting customers." The run closed into SFO just 21 minutes late on the final leg.
The route
Six legs connecting all seven United hubs coast to coast.