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London to Philadelphia
The following tables show a breakdown of airline punctuality for scheduled flights between the five London airports and Philadelphia for each year, and the year to date for which data is available.

All flights in both directions on the route are counted, by analysing the punctuality of both arrivals and depatures at the London airport(s).
 
  Most Punctual Airline on this Route
Year Airline Avg. Delay
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Operating airportsOperating monthsAverage
delay
(mins)
Operated
within 15
mins (%)
Over
1 hour
late (%)
Over
3 hours
late (%)
Total
flights
analysed
RankAirlineLHRLGWLCYSTNLTNJFMAMJJASOND
1British Airways    11.3178.833.020.281,422
2American Airlines    13.5977.635.010.98818
3Delta Air Lines    13.7380.825.151.60563
 ROUTE AVERAGE12.4678.884.030.752,803

Operating airportsOperating monthsAverage
delay
(mins)
Operated
within 15
mins (%)
Over
1 hour
late (%)
Over
3 hours
late (%)
Total
flights
analysed
RankAirlineLHRLGWLCYSTNLTNJFMAMJJASOND
1Delta Air Lines       10.7888.613.190.91439
2British Airways    15.8278.644.551.151,386
3American Airlines / US Airways    19.2674.588.471.781,239
 ROUTE AVERAGE16.4978.435.941.373,064

Operating airportsOperating monthsAverage
delay
(mins)
Operated
within 15
mins (%)
Over
1 hour
late (%)
Over
3 hours
late (%)
Total
flights
analysed
RankAirlineLHRLGWLCYSTNLTNJFMAMJJASOND
1British Airways    13.8577.714.290.931,400
2US Airways    19.3872.858.861.80722
 ROUTE AVERAGE15.7376.065.841.232,122

Operating airportsOperating monthsAverage
delay
(mins)
Operated
within 15
mins (%)
Over
1 hour
late (%)
Over
3 hours
late (%)
Total
flights
analysed
RankAirlineLHRLGWLCYSTNLTNJFMAMJJASOND
1British Airways    16.3476.296.571.111,354
2US Airways    16.5273.277.890.83722
 ROUTE AVERAGE16.4075.247.031.012,076

Operating airportsOperating monthsAverage
delay
(mins)
Operated
within 15
mins (%)
Over
1 hour
late (%)
Over
3 hours
late (%)
Total
flights
analysed
RankAirlineLHRLGWLCYSTNLTNJFMAMJJASOND
1US Airways    14.9876.386.351.38724
2British Airways    15.5575.414.160.571,395
 ROUTE AVERAGE15.3675.744.910.852,119

Operating airportsOperating monthsAverage
delay
(mins)
Operated
within 15
mins (%)
Over
1 hour
late (%)
Over
3 hours
late (%)
Total
flights
analysed
RankAirlineLHRLGWLCYSTNLTNJFMAMJJASOND
1British Airways    13.8280.613.950.991,418
2US Airways    19.5274.198.702.24713
 ROUTE AVERAGE15.7378.465.541.412,131

Operating airportsOperating monthsAverage
delay
(mins)
Operated
within 15
mins (%)
Over
1 hour
late (%)
Over
3 hours
late (%)
Total
flights
analysed
RankAirlineLHRLGWLCYSTNLTNJFMAMJJASOND
1British Airways    16.6968.436.130.681,321
2US Airways    22.2471.0410.272.28701
 ROUTE AVERAGE18.6269.347.571.242,022

2009
  Operating from London Airports Avg. Delay (mins) OTP Within 15 mins (%) 1 hr+ late (%) 3 hrs+ late (%) Total Flights Analysed
Rank Airline LHR LGW LCY STN LTN
1 British Airways         14.27 74.96 3.71 0.64 1,402
2 US Airways *       15.99 77.40 6.80 1.56 1,221
  AVERAGE BOTH AIRLINES > > > 15.07 76.10 5.15 1.07 2,623
* - US Airways discontinued LGW-PHL during October 2009


2008
  Operating from London Airports Avg. Delay (mins) OTP Within 15 mins (%) 1 hr+ late (%) 3 hrs+ late (%) Total Flights Analysed
Rank Airline LHR LGW LCY STN LTN
1 British Airways         18.70 61.06 5.60 0.91 1,428
2 US Airways ^       19.08 69.77 7.50 2.05 1,267
  AVERAGE BOTH AIRLINES > > > 18.88 65.16 6.49 1.45 2,695
^ - US Airways commenced LHR-PHL during March 2008


2007
  Operating from London Airports Avg. Delay (mins) OTP Within 15 mins (%) 1 hr+ late (%) 3 hrs+ late (%) Total Flights Analysed
Rank Airline LHR LGW LCY STN LTN
1 British Airways         27.23 51.70 9.78 0.97 1,441
2 US Airways         28.62 53.82 13.07 2.09 719
  AVERAGE BOTH AIRLINES > > > 27.69 52.41 10.88 1.34 2,160
 


2006
  Operating from London Airports Avg. Delay (mins) OTP Within 15 mins (%) 1 hr+ late (%) 3 hrs+ late (%) Total Flights Analysed
Rank Airline LHR LGW LCY STN LTN
1 US Airways         21.16 60.56 7.89 1.13 710
2 British Airways         23.50 62.50 6.67 0.97 1,440
  AVERAGE BOTH AIRLINES > > > 22.72 61.86 7.07 1.02 2,150
 


2005
  Operating from London Airports Avg. Delay (mins) OTP Within 15 mins (%) 1 hr+ late (%) 3 hrs+ late (%) Total Flights Analysed
Rank Airline LHR LGW LCY STN LTN
1 British Airways         15.66 71.01 4.27 0.42 1,428
2 US Airways         29.21 48.96 13.07 1.39 719
  AVERAGE BOTH AIRLINES > > > 20.20 63.62 7.22 0.75 2,147
 


2004
  Operating from London Airports Avg. Delay (mins) OTP Within 15 mins (%) 1 hr+ late (%) 3 hrs+ late (%) Total Flights Analysed
Rank Airline LHR LGW LCY STN LTN
1 British Airways         14.53 71.75 4.90 0.48 1,448
2 US Airways         25.08 53.56 9.73 0.96 730
  AVERAGE BOTH AIRLINES > > > 18.06 65.66 6.52 0.64 2,178
 

 
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