Trains from Heathrow Terminal 5 to Southampton from £21.00

We recommend buying train tickets from Heathrow Terminal 5 to Southampton during off-peak hours. These times are usually before 06:30, between 09:30 and 16:00, and after 19:00 on weekdays, as well as all day on weekends and bank holidays. Choosing Off-Peak train tickets means benefiting from cheaper fares and less crowded trains, making your journey more enjoyable.

Railcards offer discounts of up to 1/3 on most tickets. There are various types of Railcards catering to different types of travellers, such as the 16–25 Railcard, the Family & Friends Railcard, and the Senior Railcard. For more information on Railcards and how they can help you save, visit Railcards here.

Splitting tickets involves buying separate, cheaper tickets for different parts of your journey on the same train instead of just one ticket for the entire trip. For instance, if you're travelling from Heathrow Terminal 5 to Southampton, you might find that purchasing a ticket from A to C, then C to B costs less than a direct ticket. This method is perfectly legal and often doesn’t require leaving your seat.

Advance Tickets are typically released up to 12 weeks before the travel date and can offer significant savings compared to tickets purchased closer to departure. By planning your trip from Heathrow Terminal 5 to Southampton ahead of time and booking your tickets early, you can potentially save up to 61% on your travel expenses.

If you are planning a trip with a group of three to nine people, take advantage of ⅓ off standard fares with group travel discounts, offered by many train companies, perfect for journeys with your family, friends, or colleagues.