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Flight Reliability

UA 3422 · United Airlines

Louisville → Chicago (SDF–ORD)94% of its flights flew this route. The rest (DTW–IAD, ORD–DTW) are included in these numbers.

93
Nerd Approved
WanderNerd Reliability Score
89%
Arrive within 15 minutes
4 min early
Average arrival delay
0.8%
Cancelled
10 min early
Median arrival delay

Based on 371 historical flights. Data through May 2026.

What the data says

6–9 PM has a slight edge.

Departures between 6–9 PM arrived on time 94% of the time, against 87% between 6–9 AM.

Friday is doing you no favors.

UA 3422 arrived on time 96% of the time on Thursdays and just 80% on Fridays. That gap is worth planning around.

Better than the SDF–ORD route average.

UA 3422 arrived on time 89% of the time, versus 77% across the SDF–ORD route.

Better than the United Airlines network average.

UA 3422 arrived on time 89% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon90%(52 flights)
  • Tue94%(51 flights)
  • Wed88%(51 flights)
  • Thu96%(52 flights)
  • Fri80%(55 flights)
  • Sat83%(52 flights)
  • Sun89%(55 flights)
On-time by departure window
  • 3–6 AM94%(78 flights)
  • 6–9 AM87%(267 flights)
  • 9 AM–12 PM—(6 flights)
  • 12–3 PM—(1 flights)
  • 6–9 PM94%(16 flights)
On-time trend by month
90%
May

Jun 93% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%30
July 202581%31
August 202587%37
September 202597%30
October 202587%31
November 202579%29
December 202590%31
January 202693%30
February 202696%28
March 202681%31
April 202690%29
May 202690%31
Departures on time
93%
Diverted
0%
Flights flown
368
Months covered
12

Same route, other flights

Keep nerding

Based on 371 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.