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Route Reliability

Chicago → Philadelphia

ORD–PHL · 678 miles · Chicago O'Hare International Airport to Philadelphia International Airport

62
A Little Dicey
WanderNerd Reliability Score
72%
Arrive within 15 minutes
21 min
Average arrival delay
2.8%
Cancelled
4,818
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.United Airlines73%1,719 flights
  2. 2.American Airlines71%2,916 flights
  3. 3.Frontier Airlines59%183 flights

What the data says

Morning flights do better here.

ORD–PHL flights departing between 3–6 AM arrived on time 87% of the time, versus 61% between 3–6 PM.

Monday is the weak spot.

ORD–PHL flights arrived on time 77% of the time on Tuesdays. On Mondays: 65%.

United Airlines runs this route best.

United Airlines arrived on time 73% of the time on this route; Frontier Airlines managed 59%.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon65%(700 flights)
  • Tue77%(661 flights)
  • Wed76%(662 flights)
  • Thu72%(681 flights)
  • Fri70%(709 flights)
  • Sat74%(572 flights)
  • Sun67%(692 flights)
On-time by departure window
  • 12–3 AM—(1 flights)
  • 3–6 AM87%(198 flights)
  • 6–9 AM83%(1044 flights)
  • 9 AM–12 PM76%(885 flights)
  • 12–3 PM68%(816 flights)
  • 3–6 PM61%(462 flights)
  • 6–9 PM62%(957 flights)
  • 9 PM–12 AM66%(314 flights)
On-time trend by month
80%
May

Jun 64% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202564%380
July 202557%382
August 202572%424
September 202576%412
October 202578%443
November 202574%390
December 202566%339
January 202670%301
February 202681%328
March 202664%370
April 202674%422
May 202680%486

Same trip, other airports

Keep nerding

Based on 4,818 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.