| Portland to Nymburk | 5,354.32 mi (8,616.95 km) |
| Portland to Olomouc | 5,436.77 mi (8,749.64 km) |
| Portland to Opava | 5,428.95 mi (8,737.05 km) |
| Portland to Orlova | 5,445.24 mi (8,763.27 km) |
| Portland to Ostrava | 5,443.08 mi (8,759.79 km) |
| Portland to Ostrov | 5,301.29 mi (8,531.60 km) |
| Portland to Otrokovice | 5,466.12 mi (8,796.87 km) |
| Portland to Pardubice | 5,378.93 mi (8,656.55 km) |
| Portland to Pelhrimov | 5,403.93 mi (8,696.78 km) |
| Portland to Pisek | 5,387.85 mi (8,670.90 km) |
| Portland to Plzen | 5,344.43 mi (8,601.03 km) |
| Portland to Podebrady | 5,358.61 mi (8,623.85 km) |
| Portland to Policka | 5,408.88 mi (8,704.76 km) |
| Portland to Prachatice | 5,402.33 mi (8,694.21 km) |
| Portland to Prague | 5,346.93 mi (8,605.05 km) |
