ON TIMEBOARD
United Airlines / SAT → DEN

UA 2853 on time

United Airlines 2853: San Antonio to Denver at 8:53 a.m.; Denver to Washington at 12:26 p.m. (past 12 months). Figures below the title are for SAT → DEN, its busiest leg

On time
84%
334 flights · likely 79–87%
Cancelled
2.1%
of scheduled flights
Typical arrival
−6 min
median vs schedule
When late
+93 min
average delay
Similar flights
84%
UA, same route & hour

About 1 in 6 UA 2853 flights from San Antonio arrived 15+ minutes late, diverted or cancelled over the past year (16%); 2.1% were cancelled. The typical flight landed 6 minutes early.

UA 2853: SAT → DEN

Scheduled to leave San Antonio at 8:53 a.m. local time. Over the past year it arrived on time 84% of the time (334 flights), in line with other UA flights on the route at that hour (84%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Sep 2025: 88% on time (24 flights)88SepOct 2025: too few flights (6 flights)OctNov 2025: 87% on time (30 flights)87NovDec 2025: 84% on time (31 flights)84DecJan 2026: 81% on time (31 flights)81JanFeb 2026: 89% on time (28 flights)89FebMar 2026: 77% on time (31 flights)77MarApr 2026: 97% on time (30 flights)97AprMay 2026: 84% on time (31 flights)84MayJun 2026: 77% on time (30 flights)77JunJul 2026: 81% on time (31 flights)81JulAug 2026: 81% on time (31 flights)81Aug

By day of week

DayFlightsOn time
Monday4986%
Tuesday4879%
Wednesday4875%
Thursday4785%
Friday4781%
Saturday4787%
Sunday4892%

Why it was late

Airline (crew, maintenance, ops) 72%Air traffic & airport (NAS) 19%Late inbound plane 6%Severe weather 4%

All flights SAT → DEN · Connecting off UA 2853? Check the risk

UA 2853: DEN → IAD

Scheduled to leave Denver at 12:26 p.m. local time. Over the past year it arrived on time 78% of the time (179 flights), better than other UA flights on the route at that hour (73%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Aug 2025: too few flights (13 flights)AugSep 2025: 93% on time (30 flights)93SepOct 2025: 84% on time (25 flights)84OctApr 2026: too few flights (1 flights)AprMay 2026: 94% on time (31 flights)94MayJun 2026: 73% on time (30 flights)73JunJul 2026: 58% on time (31 flights)58JulAug 2026: 68% on time (31 flights)68Aug

By day of week

DayFlightsOn time
Monday2673%
Tuesday2584%
Wednesday2572%
Thursday2673%
Friday26100%
Saturday2669%
Sunday2576%

Why it was late

Late inbound plane 54%Airline (crew, maintenance, ops) 26%Air traffic & airport (NAS) 20%

All flights DEN → IAD · Connecting off UA 2853? Check the risk

Questions

How often is UA 2853 from SAT to DEN late?

United Airlines 2853 from San Antonio, TX to Denver, CO arrived 15 or more minutes late, was diverted or was cancelled on 16% of 334 scheduled flights between September 2025 and August 2026. 2.1% were cancelled.

How often is UA 2853 from DEN to IAD late?

United Airlines 2853 from Denver, CO to Washington, DC arrived 15 or more minutes late, was diverted or was cancelled on 22% of 179 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.

Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check United Airlines for today's flight. Method.