Trains from Portsmouth to London Waterloo from $9.50

Available up to 12 weeks before the journey, these are generally the most cost-effective option for cost-conscious travelers

Flexi Season tickets combine flexibility with value, letting you travel on any 8 days within a 28-day period. It's an ideal choice if you don't commute every day but want discounted fares.

With no time restrictions, Anytime tickets allow travel throughout the entire day. They're a great option if you require maximum flexibility or aren't sure exactly when you'll be traveling.

First Class tickets give you a more comfortable ride, with larger seats, extra legroom, and access to premium amenities such as refreshments or quieter carriages on many routes