Skip to content
WanderNerd
Check a flight

Flight Reliability

AA 3704 · American Airlines

LSE → Chicago (LSE–ORD)83% of its flights flew this route. The rest (ORD–PIA, CLT–CHS) are included in these numbers.

84
Pretty Reliable
WanderNerd Reliability Score
92%
Arrive within 15 minutes
5 min early
Average arrival delay
3.9%
Cancelled
12 min early
Median arrival delay

Based on 307 historical flights. Data through May 2026.

What the data says

The 3–6 AM departure wins.

AA 3704 departing between 3–6 AM arrived on time 94% of the time, versus 85% between 9 AM–12 PM.

Friday is doing you no favors.

AA 3704 arrived on time 95% of the time on Tuesdays. On Fridays: 86%.

Better than the LSE–ORD route average.

AA 3704 arrived on time 92% of the time, versus 82% across the LSE–ORD route.

Well ahead of the American Airlines network.

AA 3704 arrived on time 92% of the time, versus 77% across the American Airlines network.

The breakdown

On-time by weekday
  • Mon91%(42 flights)
  • Tue95%(42 flights)
  • Wed95%(42 flights)
  • Thu93%(44 flights)
  • Fri86%(44 flights)
  • Sat90%(38 flights)
  • Sun91%(43 flights)
On-time by departure window
  • 3–6 AM94%(63 flights)
  • 6–9 AM91%(194 flights)
  • 9 AM–12 PM85%(13 flights)
  • 3–6 PM—(9 flights)
  • 6–9 PM88%(16 flights)
On-time trend by month
82%
May

Jun 90% → May 82% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%30
July 202590%31
August 202593%28
September 202596%27
October 202590%30
November 202593%27
December 202586%21
January 202693%29
February 202689%28
March 202696%27
May 202682%11
Departures on time
93%
Diverted
0%
Flights flown
295
Months covered
12

Same route, other flights

Keep nerding

Based on 307 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.