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Travelling from London Kings Cross to Portsmouth Harbour, the fastest train takes 2h 32m with an average travel time of 2h 47m. With 67 daily trains, the first departs at 00:43 and the last at 23:57. Off-Peak hours begin at 09:30 on weekdays, and all-day Off-Peak on weekends and bank holidays. Keep informed of live train status, times, delays, and cancellations with us.
| Departs | Arrives | Operator | ||
|---|---|---|---|---|
| 07:30London Kings Cross | 2h 56m, Direct | 10:26Portsmouth Harbour | South Western Railway | Find tickets | 
| 07:39London Kings Cross | 2h 41m, Direct | 10:20Portsmouth Harbour | Southern | Find tickets | 
| 08:09London Kings Cross | 2h 33m, Direct | 10:42Portsmouth Harbour | Southern | Find tickets | 
| 08:31London Kings Cross | 2h 47m, Direct | 11:18Portsmouth Harbour | South Western Railway | Find tickets | 
| 08:39London Kings Cross | 2h 41m, Direct | 11:20Portsmouth Harbour | Southern | Find tickets | 
Taking the train from London Kings Cross to Portsmouth Harbour is both efficient and enjoyable, offering scenic views and comfort. With frequent departures from London Kings Cross, you can arrive at Portsmouth Harbour in just 2h 32m, making it a quick and convenient option for travelling between these two places.

The quickest train journey from London Kings Cross to Portsmouth Harbour takes 2h 32m . Utilise our Train Journey Planner to locate direct trains, minimise transfers, and compare travel times across various routes. Discover the most efficient way to travel with fewer stops for a smooth and seamless journey.
No, you will need to transfer when travelling from London Kings Cross to Portsmouth Harbour. TrainPal Train Journey Planner will assist you in finding the best train route. Enter the origin or destination places and other relevant details, then click "Search" to find the most suitable route.

While London Kings Cross to Portsmouth Harbour trains are usually on time, delays or disruptions may occur due to weather, strikes, and other factors. Finding a train timetable for your trip from London Kings Cross to Portsmouth Harbour is easy with Train Journey Planner. Simply enter your departure and arrival stations to get a detailed schedule of available trains. Input your travel details to discover the best routes, connections, and train times.
Typically, you should plan to arrive at the station 15-20 minutes before your train is scheduled to depart. However, the size of the station and your familiarity with it can affect this timing. For larger or less familiar stations, leaving home earlier can help reduce stress and ensure a more relaxed journey.
Yes, most trains on the London Kings Cross to Portsmouth Harbour route offer amenities like Wi-Fi, food services, and various seating options. Additional facilities may include power sockets, accessibility features, and luggage storage. Check the specific amenities offered by the train operator when booking, as these can vary.
Make use of our Train Journey Planner for detailed transfer information, ensuring your journey is smooth and efficient, saving you valuable time and effort, and allowing you to rest completely for your travels.

Get easy and quick access to live updates and notifications via the TrainPal app. If your phone is enabled to receive messages from us, you'll receive notifications about train cancellations on your screen as soon as you pick up your phone
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Trainpal makes it easy to handle travel changes, ticket refunds, and Delay Repay requests.


Cheaper train tickets for less busy times. Combine with Advance fares for the best deals.
* Prices are dynamic and subject to change. Ticket prices vary based on time of day, route, and class. This pricing does not apply to discounted Split tickets and Railcards.
* Save an average of 73% by combining Advance Ticket savings of 73% with an additional 30% through split tickets. These savings apply to Advance fares booked at least one week before travel, excluding Anytime fares purchased on the day of travel. Availability may vary by route and may not be combined with other offers.