The 34-year-old winger was a free agent after departing Turkish side Kayserispor.
Former England international Lennon joined Burnley from Everton in 2018 and played 41 Premier League matches, scoring once, before leaving two years later.
The Clarets said on Twitter: "We are delighted to confirm that winger Aaron Lennon has agreed a deal to return to Turf Moor as a Burnley player."
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| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Leeds UnitedLeeds | 36 | 22 | 10 | 4 | 72 | 23 | 49 | 76 |
| 2 | Sheffield UnitedSheff Utd | 36 | 24 | 6 | 6 | 51 | 27 | 24 | 76 |
| 3 | Burnley | 36 | 20 | 14 | 2 | 49 | 10 | 39 | 74 |
| 4 | Sunderland | 36 | 19 | 11 | 6 | 54 | 33 | 21 | 68 |
| 5 | Coventry CityCoventry | 36 | 16 | 8 | 12 | 52 | 46 | 6 | 56 |
| 6 | West Bromwich AlbionWest Brom | 36 | 13 | 16 | 7 | 46 | 32 | 14 | 55 |
| 7 | Bristol City | 36 | 13 | 14 | 9 | 46 | 39 | 7 | 53 |
| 8 | Blackburn RoversBlackburn | 36 | 15 | 7 | 14 | 41 | 37 | 4 | 52 |
| 9 | Middlesbrough | 36 | 14 | 8 | 14 | 55 | 47 | 8 | 50 |
| 10 | Norwich CityNorwich | 36 | 12 | 13 | 11 | 57 | 49 | 8 | 49 |
| 11 | Watford | 36 | 14 | 7 | 15 | 46 | 50 | -4 | 49 |
| 12 | Millwall | 36 | 12 | 12 | 12 | 36 | 37 | -1 | 48 |
| 13 | Sheffield WednesdaySheff Weds | 36 | 13 | 9 | 14 | 50 | 56 | -6 | 48 |
| 14 | Queens Park RangersQPR | 36 | 11 | 11 | 14 | 41 | 46 | -5 | 44 |
| 15 | Swansea CitySwansea | 36 | 12 | 8 | 16 | 38 | 46 | -8 | 44 |
| 16 | Preston North EndPreston | 36 | 9 | 16 | 11 | 36 | 42 | -6 | 43 |
| 17 | Portsmouth | 36 | 11 | 9 | 16 | 44 | 57 | -13 | 42 |
| 18 | Oxford UnitedOxford Utd | 36 | 9 | 12 | 15 | 37 | 53 | -16 | 39 |
| 19 | Hull City | 36 | 9 | 10 | 17 | 36 | 45 | -9 | 37 |
| 20 | Stoke CityStoke | 36 | 8 | 12 | 16 | 36 | 50 | -14 | 36 |
| 21 | Cardiff CityCardiff | 36 | 8 | 12 | 16 | 39 | 59 | -20 | 36 |
| 22 | Derby CountyDerby | 36 | 8 | 8 | 20 | 35 | 49 | -14 | 32 |
| 23 | Luton TownLuton | 36 | 8 | 7 | 21 | 32 | 59 | -27 | 31 |
| 24 | Plymouth ArgylePlymouth | 36 | 6 | 12 | 18 | 36 | 73 | -37 | 30 |
| > Championship Full Table | |||||||||
