The average bus between Ottawa and Portsmouth takes 20h 37m and the fastest bus takes 18h 10m. The bus service runs several times per day from Ottawa to Portsmouth. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Buses run twice daily between Ottawa and Portsmouth. The earliest departure is at 12:00 PM in the afternoon, and the last departure from Ottawa is at 8:45 PM which arrives into Portsmouth at 7:50 PM. All services require a transfer at Montreal, QC - 1597 Rue St-Hubert and take an average of 20h 37m. The schedules shown below are for the next available departures.
Arrives next day


18h 10m • 2 changes
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23h 5m • 2 changes
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18h 10m • 2 changes
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23h 5m • 2 changes
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18h 10m • 2 changes
Arrives next day


23h 5m • 2 changes
Arrives next day


18h 10m • 2 changes
Arrives next day


23h 5m • 2 changes
Want to know about travelling from Ottawa to Portsmouth? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct bus from Ottawa to Portsmouth. However, there are services departing from Ottawa station and arriving at Portsmouth station via Montreal, QC - 1597 Rue St-Hubert. The journey, including transfers, takes approximately 20h 37m.
Ottawa to Portsmouth bus services, operated by Tour Express, depart from Ottawa, ON - 600 Cumberland St station.
Ottawa to Portsmouth bus services, operated by Tour Express, arrive at Portsmouth Bus Stop station.
The distance between Ottawa and Portsmouth is 471.3 km. The road distance is 796 km.
You can take a bus from Ottawa, ON - 600 Cumberland St to Portsmouth Bus Stop via Montreal, QC - 1597 Rue St-Hubert, Montreal, and Boston in around 12h 15m.