Find cheap flights from London Heathrow Airport to Portsmouth from £398

When flying out of London Heathrow Airport you’ll be using London Heathrow. Portsmouth does not have its own airport so you’ll be flying into nearby Southampton Eastleigh airport, which is 14.7 mi away.

There are no direct flights covering the 53 miles separating London Heathrow Airport and Portsmouth but indirect flights take around 4h 40m.

Consider leaving on a Thursday and avoid Fridays if you are looking for the best rates. For your return to London Heathrow Airport, you’ll find the best rates on Tuesdays and the most expensive ones on Fridays.

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London Heathrow Airport to Portsmouth.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Portsmouth from London Heathrow Airport is likely to change within 7 days, so travellers know whether to wait or book now.

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Portsmouth with an airline and back to London Heathrow Airport with another airline.

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Portsmouth from London Heathrow Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.