We've gone through lots of different flights, to help you find the cheapest way to get from London Heathrow to Southampton. You can choose from two airlines. At the moment, 13 / Sep / 2025 is the cheapest date to travel, but scroll through the results to find the option that works best for you.
There are 30 flights from London Heathrow to or via Southampton every week. Out of the two available airlines, the most popular ones are British Airways & Aer Lingus. But that doesn’t necessarily mean they’ll be the best option for your travel dates. To see as many flights as possible, try widening your search to include other departure airports.
The distance between London Heathrow to Southampton is 85 km. Normally, it takes about 4 hrs 50 mins to fly, and you can definitely expect the journey to be at least 4 hrs 35 mins. You can see the various flight times in the results.
Searching by month, for instance, will show you the best time of the week to fly.
