| Gretna to Benisa | 4,967.96 mi (7,995.16 km) |
| Gretna to Berga | 4,958.08 mi (7,979.26 km) |
| Gretna to Berja | 4,870.05 mi (7,837.58 km) |
| Gretna to Bermeo | 4,708.96 mi (7,578.34 km) |
| Gretna to Berriozar | 4,773.25 mi (7,681.81 km) |
| Gretna to Betanzos | 4,452.59 mi (7,165.75 km) |
| Gretna to Betera | 4,918.11 mi (7,914.93 km) |
| Gretna to Bilbao | 4,703.77 mi (7,569.99 km) |
| Gretna to Binefar | 4,892.41 mi (7,873.57 km) |
| Gretna to Binisalem | 5,075.00 mi (8,167.42 km) |
| Gretna to Blanes | 5,014.59 mi (8,070.21 km) |
| Gretna to Boadilla del Monte | 4,729.76 mi (7,611.81 km) |
| Gretna to Boiro | 4,432.82 mi (7,133.94 km) |
| Gretna to Bolanos de Calatrava | 4,776.85 mi (7,687.60 km) |
| Gretna to Bollullos de la Mitacion | 4,694.86 mi (7,555.65 km) |
