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Route on-time record

ORD to SUX: most on-time flights and the best time to fly

Chicago (Chicago O'Hare International Airport) to Sioux City (Sioux Gateway Airport / Brigadier General Bud Day Field). 365 nonstop flights in Jun 2025 to May 2026, 58% arrived within 15 minutes and 4.4% were cancelled. The most reliable flight number was SkyWest 5021 at 4:15 PM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

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ORD → SUX

Chicago to Sioux City: 365 nonstop flights a year

On time (12 months)

58%

Cancelled

4.4%

avg delay 47 min

Best time to leave

After 9 PM

75% on time vs 43% 6 to 9 PM

Most reliable airline

SkyWest

56% chance on time

Check ORD to SUX fares

Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

  1. #1 · SkyWest 5021 · sold as United Express, Delta Connection, American Eagle or Alaska

    4:15 PM → 6:06 PM1h 51m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    56%

    chance on time

    On time (history)
    59%
    Cancelled
    4.6%
    Avg arrival delay
    52 min
    • Arrived on time 59% of the time (219 flights, Jun 2025 to May 2026).
    • Cancelled 4.6% of the time (11 of 238).
    • Departs inside ORD's trouble window: 43% of its 237 ground stops and delay programs started between 2 PM and 8 PM.

    Strong track record · 219 flights

    Find 4:15 PM flight fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)56%

    365 flights · 58% on time as flown · 4.4% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

  • 3 to 6 PM51%

    146 flights · avg delay 52 min

  • 6 to 9 PM43%

    79 flights · avg delay 57 min

  • After 9 PM75%

    136 flights · avg delay 26 min

Best day: Thursday (77%). Worst: Sunday (65%).

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

J
69
F
74
M
67
A
66
M
59
J
59
J
56
A
64
S
81
O
79
N
75
D
75

What delays this route

  • Airline (crew, maintenance, boarding)51%
  • Late-arriving aircraft27%
  • Air traffic control and airport volume17%
  • Severe weather5%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

Finding the most reliable connections from ORD to SUX…

ORD to SUX questions

What time of day is best to fly ORD to SUX?
After 9 PM: 75% of flights arrived on time, against 43% for departures 6 to 9 PM.
Which airline is most on time from ORD to SUX?
SkyWest, with a season-adjusted 56% chance of operating and arriving on time over 365 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on ORD to SUX?
July (56% on time); the best was September (81%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?
No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

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Live status: FAA delays and ground stops