ON TIMEBOARD
ORD Chicago

ORD → SUX on time

Chicago O'Hare (Chicago, IL) to Sioux Gateway / Brigadier General Bud Day (Sioux City, IA). Every scheduled flight, September 2025 to August 2026.

On time
57%
arrived < 15 min late
Cancelled
4.4%
365 flights
Typical arrival
+5 min
median vs schedule
When late
+111 min
average delay
Flights / day
1
1 airline

57% of flights from Chicago to Sioux City arrived on time over the past 12 months. That is worse than the typical U.S. route. The 9 p.m. departures ran on time 67% of the time; the 3 p.m. ones 56%. 22% of flights arrived more than an hour late or not at all.

How late?

The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for ORD → SUX: when a flight was late, it was under 45 minutes late 49% of the time. About 1 in 6 flights landed an hour or more late, and 1 in 18 three hours or more; 4.4% were cancelled outright.

Share of all 365 scheduled flights, past 12 months, by arrival time against schedule.

By airline

AirlineFlightsOn timeCancelledTypical arrival1h+ lateAvg when lateOperated by
United Airlines36557%4.4%+5 min16.4%+111 minSkyWest

Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.

Best time of day to fly

On-time rate by scheduled departure hour (local time at ORD). Delays build through the day as late planes knock on, so early flights usually do best.

40%70%100%3 p.m. departures: 56% on time (153 flights)563p4 p.m. departures: too few flights (85 flights)4p5 p.m. departures: too few flights5p6 p.m. departures: too few flights6p7 p.m. departures: too few flights7p8 p.m. departures: too few flights8p9 p.m. departures: 67% on time (123 flights)679p
ORD → SUX, share of flights arriving on time, by departure hour. Hours with under 100 flights are greyed out.
82%+ on time76–82%68–76%under 68%too few flights

By month

Each calendar month pooled over 2023–2026.

40%70%100%Jan: too few flights (92 flights)JanFeb: too few flights (85 flights)FebMar: too few flights (93 flights)MarApr: too few flights (90 flights)AprMay: too few flights (93 flights)MayJun: too few flights (90 flights)JunJul: too few flights (93 flights)JulAug: too few flights (93 flights)AugSep: too few flights (90 flights)SepOct: too few flights (93 flights)OctNov: too few flights (89 flights)NovDec: too few flights (91 flights)Dec

By day of week

DayFlightsOn timeCancelled
Monday53——
Tuesday52——
Wednesday52——
Thursday52——
Friday52——
Saturday52——
Sunday52——

Why flights were late

Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.

Airline (crew, maintenance, ops) 48%Late inbound plane 29%Air traffic & airport (NAS) 19%Severe weather 4%

Cancellations: weather 12 · air traffic/airport 3 · airline 1

Month by month

Not enough months with data to draw a trend.

Flight numbers on this route

Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.

FlightDepartsFlightsOn timeCancelledTypical arrivalOperated by
UA 50213:59 p.m.23859%4.6%+3 minSkyWest

Questions

How often are flights from ORD to SUX on time?

57% of 365 scheduled flights from Chicago, IL to Sioux City, IA arrived within 15 minutes of schedule between September 2025 and August 2026. 4.4% were cancelled.

What is the best time of day to fly ORD to SUX?

Flights scheduled to leave at 9 p.m. were the most reliable (67% on time). The 3 p.m. departures were the least (56%).

Related

Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.