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Flight Reliability

UA 3677 · United Airlines

Indianapolis → Chicago (IND–ORD)87% of its flights flew this route. The rest (CMH–ORD, ORD–CVG) are included in these numbers.

93
Nerd Approved
WanderNerd Reliability Score
89%
Arrive within 15 minutes
5 min early
Average arrival delay
1.1%
Cancelled
13 min early
Median arrival delay

Based on 348 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

UA 3677 departing between 3–6 AM arrived on time 96% of the time, versus 82% between 6–9 PM.

Sunday scaries are real for this one.

UA 3677 arrived on time 94% of the time on Wednesdays. On Sundays: 85%.

Better than the IND–ORD route average.

UA 3677 arrived on time 89% of the time, versus 78% across the IND–ORD route.

Better than the United Airlines network average.

UA 3677 arrived on time 89% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon92%(49 flights)
  • Tue88%(48 flights)
  • Wed94%(49 flights)
  • Thu90%(50 flights)
  • Fri88%(49 flights)
  • Sat86%(51 flights)
  • Sun85%(48 flights)
On-time by departure window
  • 3–6 AM96%(23 flights)
  • 6–9 AM—(1 flights)
  • 9 AM–12 PM89%(307 flights)
  • 12–3 PM—(2 flights)
  • 6–9 PM82%(11 flights)
On-time trend by month
86%
May

Jun 93% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%30
July 202581%31
August 202587%31
September 202597%30
October 202597%31
November 202589%28
December 202567%30
January 202693%30
February 202693%28
March 202697%31
April 202687%30
May 202686%14
Departures on time
90%
Diverted
0%
Flights flown
344
Months covered
12

Same route, other flights

Keep nerding

Based on 348 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.