| London/Watson Airfield | |
| Tc: | CLW4 |
| Type: | Private |
| Operator: | John Watson |
| Location: | London, Ontario |
| Timezone: | EST |
| Summer: | EDT |
| Elevation-F: | 935 |
| Coordinates: | 43.1058°N -81.2394°W |
| Pushpin Map: | Canada Ontario#Canada |
| Pushpin Label: | CLW4 |
| Pushpin Map Caption: | Location in Ontario |
| R1-Number: | 08/26 |
| R1-Length-F: | 1,890 |
| R1-Surface: | Turf |
| Footnotes: | Source: Canada Flight Supplement |
London/Watson Airfield is a registered aerodrome located 7.1NM north of London, Ontario, Canada.