| Sintra to Manor (Texas) | 4,851.11 mi (7,807.11 km) |
| Sintra to Manorville (New York) | 3,291.50 mi (5,297.16 km) |
| Sintra to Mansfield (Ohio) | 3,767.30 mi (6,062.89 km) |
| Sintra to Mansfield (Texas) | 4,746.57 mi (7,638.86 km) |
| Sintra to Manteca (California) | 5,602.76 mi (9,016.77 km) |
| Sintra to Manville (New Jersey) | 3,387.45 mi (5,451.58 km) |
| Sintra to Maple Grove (Minnesota) | 4,142.42 mi (6,666.59 km) |
| Sintra to Maple Heights (Ohio) | 3,703.57 mi (5,960.33 km) |
| Sintra to Maple Valley (Washington) | 5,186.53 mi (8,346.91 km) |
| Sintra to Mapleton (Utah) | 5,103.34 mi (8,213.03 km) |
| Sintra to Maplewood (Minnesota) | 4,127.09 mi (6,641.91 km) |
| Sintra to Marana (Arizona) | 5,413.48 mi (8,712.15 km) |
| Sintra to Marco Island (Florida) | 4,204.85 mi (6,767.06 km) |
| Sintra to Margate (Florida) | 4,114.88 mi (6,622.25 km) |
| Sintra to Maricopa (Arizona) | 5,425.38 mi (8,731.30 km) |
