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| | London Heathrow Airport | All UK Airports * |
| Jan-Dec 2010 | Jan-Dec 2009 | Jan-Dec 2010 |
| Average delay (mins) | 16.32 | 12.20 | 16.85 |
| Within 15 mins (%) | 71.74 | 78.62 | 72.83 |
| Over 1 hour late (%) | 6.04 | 4.17 | 6.80 |
| Over 3 hours late (%) | 0.80 | 0.57 | 0.96 |
| Total flights analysed | 445,093 | 454,674 | 1,288,956 |
| | * - 10 UK Reporting Airports |
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Punctuality Statistics for the 30 largest scheduled airlines at London Heathrow Airport (in terms of total flights during the period). (Jan-Dec 2010) |
| Operated during months | Average delay (mins) | Operated within 15 mins (%) | Over 1 hour late (%) | Over 3 hours late (%) | Total flights analysed | | Rank | Airline | J | F | M | A | M | J | J | A | S | O | N | D |
| 1 | KLM |  |  |  |  |  |  |  |  |  |  |  |  | 8.96 | 83.12 | 3.23 | 0.25 | 6,773 |
| 2 | Qatar Airways |  |  |  |  |  |  |  |  |  |  |  |  | 9.37 | 81.84 | 2.32 | 0.53 | 2,847 |
| 3 | Scandinavian SAS |  |  |  |  |  |  |  |  |  |  |  |  | 10.06 | 81.95 | 3.85 | 0.35 | 13,498 |
| 4 | Etihad Airways |  |  |  |  |  |  |  |  |  |  |  |  | 10.52 | 83.68 | 3.54 | 0.51 | 2,145 |
| 5 | Finnair |  |  |  |  |  |  |  |  |  |  |  |  | 11.94 | 79.79 | 4.00 | 0.55 | 2,751 |
| 6 | bmi British Midland |  |  |  |  |  |  |  |  |  |  |  |  | 12.15 | 78.83 | 4.53 | 0.53 | 38,211 |
| 7 | Aer Lingus |  |  |  |  |  |  |  |  |  |  |  |  | 13.16 | 77.34 | 5.23 | 0.65 | 15,648 |
| 8 | Brussels Airlines |  |  |  |  |  |  |  |  |  |  |  |  | 14.01 | 74.51 | 5.52 | 0.37 | 2,444 |
| 9 | Air France |  |  |  |  |  |  |  |  |  |  |  |  | 14.16 | 73.38 | 4.60 | 0.54 | 5,875 |
| 10 | United Airlines |  |  |  |  |  |  |  |  |  |  |  |  | 14.44 | 75.97 | 5.84 | 0.67 | 6,592 |
| 11 | Singapore Airlines |  |  |  |  |  |  |  |  |  |  |  |  | 14.90 | 75.90 | 3.78 | 0.89 | 2,141 |
| 12 | Alitalia |  |  |  |  |  |  |  |  |  |  |  |  | 15.01 | 68.75 | 5.04 | 0.29 | 6,647 |
| 13 | Swiss Airlines |  |  |  |  |  |  |  |  |  |  |  |  | 15.13 | 70.47 | 5.62 | 0.27 | 8,275 |
| 14 | Austrian Airlines |  |  |  |  |  |  |  |  |  |  |  |  | 15.63 | 66.98 | 4.94 | 0.35 | 2,265 |
| 15 | Lufthansa |  |  |  |  |  |  |  |  |  |  |  |  | 15.90 | 69.23 | 6.03 | 0.38 | 24,586 |
| 16 | British Airways |  |  |  |  |  |  |  |  |  |  |  |  | 16.04 | 72.36 | 5.84 | 0.81 | 184,682 |
| 17 | TAP Air Portugal |  |  |  |  |  |  |  |  |  |  |  |  | 16.80 | 69.18 | 6.78 | 0.77 | 4,425 |
| 18 | Jet Airways |  |  |  |  |  |  |  |  |  |  |  |  | 16.91 | 69.99 | 6.84 | 0.37 | 2,149 |
| 19 | Emirates |  |  |  |  |  |  |  |  |  |  |  |  | 19.08 | 59.68 | 5.30 | 0.39 | 3,564 |
| 20 | Cathay Pacific Airways |  |  |  |  |  |  |  |  |  |  |  |  | 19.72 | 70.34 | 5.63 | 1.23 | 2,842 |
| 21 | American Airlines |  |  |  |  |  |  |  |  |  |  |  |  | 19.97 | 65.99 | 8.05 | 1.10 | 11,484 |
| 22 | Air Canada |  |  |  |  |  |  |  |  |  |  |  |  | 20.07 | 66.93 | 6.66 | 1.37 | 7,210 |
| 23 | Delta Airlines |  |  |  |  |  |  |  |  |  |  |  |  | 20.58 | 65.96 | 9.19 | 1.24 | 3,798 |
| 24 | Vueling Airlines |  |  |  |  |  |  |  |  |  |  |  |  | 21.14 | 61.17 | 8.22 | 0.93 | 2,045 |
| 25 | Continental Airlines |  |  |  |  |  |  |  |  |  |  |  |  | 21.56 | 67.07 | 8.68 | 1.96 | 4,088 |
| 26 | Virgin Atlantic Airways |  |  |  |  |  |  |  |  |  |  |  |  | 21.71 | 64.45 | 8.28 | 1.39 | 13,816 |
| 27 | Iberia |  |  |  |  |  |  |  |  |  |  |  |  | 25.25 | 57.14 | 11.62 | 1.18 | 5,523 |
| 28 | Qantas |  |  |  |  |  |  |  |  |  |  |  |  | 25.88 | 67.85 | 6.91 | 2.08 | 2,650 |
| 29 | THY Turkish |  |  |  |  |  |  |  |  |  |  |  |  | 26.50 | 48.30 | 10.20 | 0.87 | 2,766 |
| 30 | Air India |  |  |  |  |  |  |  |  |  |  |  |  | 31.95 | 59.24 | 13.85 | 2.31 | 2,723 |
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