BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
ORD→ALO

Chicago, IL (ORD) to Waterloo, IA (ALO) flight delay odds

70.1% of 663 official scheduled ORD-to-ALO flights arrived on time; 17.9% arrived at least 30 minutes late and 3.3% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALVariable
70.1%arrived on time
17.9%30+ min late
3.3%cancelled
663scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late12.2%all scheduled flights
120+ minutes late5.3%all scheduled flights
Diverted0.9%did not reach as scheduled
Average arrival+16.5 mincompleted flights

Which departure time was most reliable for ORD to ALO?

Among qualifying ORD-to-ALO departure window results, Evening had the highest on-time rate: 78.7% of 47 flights. Night was lowest at 62.3% across 310 flights.

Departure windowFlightsOn time30+ minCancelled
Afternoon30676.8%14.1%1.3%
Evening4778.7%12.8%0.0%
Night31062.3%22.6%5.8%

Which weekday was most reliable for ORD to ALO?

Among qualifying ORD-to-ALO weekday results, Saturday had the highest on-time rate: 80.5% of 77 flights. Wednesday was lowest at 65.7% across 102 flights.

DayFlightsOn time30+ minCancelled
Monday10471.2%21.2%1.9%
Tuesday7275.0%12.5%1.4%
Wednesday10265.7%21.6%1.0%
Thursday10167.3%17.8%4.0%
Friday10368.9%18.4%4.9%
Saturday7780.5%10.4%3.9%
Sunday10466.3%20.2%5.8%

Which airline was most reliable for ORD to ALO?

Among qualifying ORD-to-ALO airline results, Envoy Air had the highest on-time rate: 71.1% of 616 flights. SkyWest Airlines was lowest at 57.4% across 47 flights.

AirlineFlightsOn time30+ minCancelled
Envoy Air61671.1%17.4%2.6%
SkyWest Airlines4757.4%25.5%12.8%

Which month was most reliable for ORD to ALO?

Among qualifying ORD-to-ALO month results, October 2025 had the highest on-time rate: 85.2% of 61 flights. December 2025 was lowest at 53.6% across 56 flights.

MonthFlightsOn time30+ minCancelled
July 20256162.3%19.7%1.6%
August 20255583.6%9.1%0.0%
September 20255280.8%3.8%0.0%
October 20256185.2%8.2%0.0%
November 20255474.1%14.8%5.6%
December 20255653.6%32.1%8.9%
January 20265461.1%27.8%0.0%
February 20264883.3%8.3%0.0%
March 20265360.4%18.9%7.5%
April 20265955.9%32.2%5.1%
May 20265981.4%15.3%0.0%
June 20265160.8%23.5%11.8%

What drove ORD to ALO delay minutes?

Late aircraft was the largest recorded ORD-to-ALO delay category, accounting for 48.1% of 14,662 BTS-attributed delay minutes during July 2025–June 2026.

Airline12.5%
Late aircraft48.1%
National airspace19.7%
Weather19.7%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.