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Flight Reliability

UA 2418 · United Airlines

Chicago → Philadelphia (ORD–PHL)83% of its flights flew this route. The rest (ORD–SFO, AUS–DEN) are included in these numbers.

88
Pretty Reliable
WanderNerd Reliability Score
86%
Arrive within 15 minutes
1 min
Average arrival delay
1.4%
Cancelled
9 min early
Median arrival delay

Based on 353 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

UA 2418 departing between 6–9 AM arrived on time 87% of the time, versus 79% between 6–9 PM.

Saturday is the weak spot.

UA 2418 arrived on time 94% of the time on Wednesdays. On Saturdays: 80%.

Better than the ORD–PHL route average.

UA 2418 arrived on time 86% of the time, versus 72% across the ORD–PHL route.

A bit ahead of the United Airlines network.

UA 2418 arrived on time 86% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon80%(51 flights)
  • Tue89%(52 flights)
  • Wed94%(51 flights)
  • Thu82%(54 flights)
  • Fri89%(53 flights)
  • Sat80%(35 flights)
  • Sun85%(52 flights)
On-time by departure window
  • 6–9 AM87%(251 flights)
  • 9 AM–12 PM82%(60 flights)
  • 12–3 PM—(7 flights)
  • 3–6 PM82%(11 flights)
  • 6–9 PM79%(19 flights)
On-time trend by month
91%
May

Jun 87% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202587%31
August 202597%30
September 202593%30
October 202587%31
November 202575%28
December 202576%29
January 202662%26
February 202696%22
March 202697%30
April 202677%26
May 202691%35
Departures on time
87%
Diverted
0%
Flights flown
348
Months covered
12

Same route, other flights

Keep nerding

Based on 353 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.