Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Portsmouth as you normally would.
Due to multiple factors, expect to potentially pay more when booking in March. For low rates, August can be a great choice for travel to Portsmouth. Flights to Portsmouth from London Heathrow Airport in August are about £65 on average during August, but can be found for as low as £47.
748 Air Services, AccesRail, and Flybe are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.
Yes, there are multiple flights from London Heathrow Airport to Portsmouth for under £100. The cheapest flight booked recently is on 748 Air Services for just £47, but on average you can expect to pay £256.
There are currently 4+ open flights from London Heathrow Airport to Portsmouth within the next 7 days for less than £100.
Morning 6 AM to midday | 42% of flight departures |
Afternoon Midday to 6 PM | 37% of flight departures |
Evening 6 PM to midnight | 14% of flight departures |
Early morning Midnight to 6 AM | 7% of flight departures |