| Great Missenden to Opole | 808.26 mi (1,300.77 km) |
| Great Missenden to Orzesze | 851.58 mi (1,370.48 km) |
| Great Missenden to Osowa | 815.41 mi (1,312.27 km) |
| Great Missenden to Ostroda | 873.30 mi (1,405.44 km) |
| Great Missenden to Ostroleka | 940.20 mi (1,513.10 km) |
| Great Missenden to Ostrow Mazowiecka | 955.29 mi (1,537.39 km) |
| Great Missenden to Ostrow Wielkopolski | 791.54 mi (1,273.85 km) |
| Great Missenden to Ostrowiec Swietokrzyski | 952.49 mi (1,532.89 km) |
| Great Missenden to Ostrzeszow | 798.79 mi (1,285.52 km) |
| Great Missenden to Oswiecim | 873.76 mi (1,406.19 km) |
| Great Missenden to Otwock | 933.47 mi (1,502.28 km) |
| Great Missenden to Ozarow Mazowiecki | 913.03 mi (1,469.38 km) |
| Great Missenden to Ozimek | 820.14 mi (1,319.88 km) |
| Great Missenden to Ozorkow | 851.01 mi (1,369.57 km) |
| Great Missenden to Pabianice | 858.07 mi (1,380.93 km) |
