ON TIMEBOARD
United Airlines / GRR → ORD

UA 2099 on time

United Airlines 2099: Grand Rapids to Chicago at 7:30 a.m.; Chicago to Seattle at 8:45 a.m. (past 12 months). Figures below the title are for GRR → ORD, its busiest leg

On time
69%
317 flights · likely 64–74%
Cancelled
0.3%
of scheduled flights
Typical arrival
+5 min
median vs schedule
When late
+67 min
average delay
Similar flights
69%
UA, same route & hour

About 1 in 3 UA 2099 flights from Grand Rapids arrived 15+ minutes late, diverted or cancelled over the past year (31%); 0.3% were cancelled. The typical flight landed 5 minutes late.

UA 2099: GRR → ORD

Scheduled to leave Grand Rapids at 7:30 a.m. local time. Over the past year it arrived on time 69% of the time (317 flights), in line with other UA flights on the route at that hour (69%). Last seen in the data Aug 31, 2026.

Month by month

30%65%100%Aug 2025: 77% on time (31 flights)77AugSep 2025: 83% on time (30 flights)83SepOct 2025: 71% on time (31 flights)71OctNov 2025: 73% on time (30 flights)73NovDec 2025: 42% on time (31 flights)42DecJan 2026: 42% on time (31 flights)42JanFeb 2026: 67% on time (27 flights)67FebMar 2026: 74% on time (31 flights)74MarApr 2026: 63% on time (30 flights)63AprMay 2026: 80% on time (30 flights)80MayJun 2026: 96% on time (25 flights)96JunAug 2026: 81% on time (21 flights)81Aug

By day of week

DayFlightsOn time
Monday4654%
Tuesday4683%
Wednesday4573%
Thursday4578%
Friday4567%
Saturday4567%
Sunday4564%

Why it was late

Airline (crew, maintenance, ops) 53%Air traffic & airport (NAS) 45%Severe weather 1%

All flights GRR → ORD · Connecting off UA 2099? Check the risk

UA 2099: ORD → SEA

Scheduled to leave Chicago at 8:45 a.m. local time. Over the past year it arrived on time 82% of the time (217 flights), worse than other UA flights on the route at that hour (87%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Jan 2026: 69% on time (26 flights)69JanFeb 2026: too few flights (11 flights)FebMar 2026: 56% on time (27 flights)56MarApr 2026: 90% on time (30 flights)90AprMay 2026: 90% on time (31 flights)90MayJun 2026: 97% on time (30 flights)97JunJul 2026: 90% on time (31 flights)90JulAug 2026: 77% on time (31 flights)77Aug

By day of week

DayFlightsOn time
Monday3187%
Tuesday3181%
Wednesday3181%
Thursday3190%
Friday3174%
Saturday3177%
Sunday3187%

Why it was late

Late inbound plane 39%Air traffic & airport (NAS) 33%Airline (crew, maintenance, ops) 23%Severe weather 6%

All flights ORD → SEA · Connecting off UA 2099? Check the risk

Questions

How often is UA 2099 from GRR to ORD late?

United Airlines 2099 from Grand Rapids, MI to Chicago, IL arrived 15 or more minutes late, was diverted or was cancelled on 31% of 317 scheduled flights between September 2025 and August 2026. 0.3% were cancelled.

How often is UA 2099 from ORD to SEA late?

United Airlines 2099 from Chicago, IL to Seattle, WA arrived 15 or more minutes late, was diverted or was cancelled on 18% of 217 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.