Cheap flights from London Heathrow Airport to Portugal from £51

The month of January is, on average, the cheapest month to fly to Portugal from London Heathrow Airport, with most prices found around £151. If you are unable to visit Portugal during the month of January, then departing from London Heathrow Airport during the month February is also very affordable. Most momondo users find prices during this month for around £151.

The cheapest day to depart from London Heathrow Airport to Portugal is on a Thursday when prices can be found for as low as £286. Flights from London Heathrow Airport to Portugal on a Monday will generally be more expensive and average around £322. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

The cheapest time of day to fly to Portugal is in the evening when flights can be purchased for as low as £250. Flights to Portugal are more costly in the morning, with an average ticket price of £326. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from London Heathrow to Lisbon Humberto Delgado for the best London Heathrow - Portugal flight prices

You are more likely to see cheaper flights to Portugal from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around £204 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from London Heathrow Airport for as low as £189 on momondo.

There are 3 cabin classes available to choose from on London Heathrow Airport to Portugal flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Vueling, British Airways, and Scandinavian Airlines are the most popular carriers operating from London Heathrow to Portugal

TAP AIR PORTUGAL, British Airways and easyJet are the top three most popular airlines that fly to Portugal from London Heathrow Airport according to our data. TAP AIR PORTUGAL is the first choice among our users, with 75% of people opting to fly with this airline when travelling to Portugal. Keep in mind that there are 12 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

Historically, on average around 22% of flights between London and Portugal have experienced a delay on any given week. The average delay length over the past 12 months has been 106 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing at night have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, British Airways have had the fewest delays on this route over the last 12 months, with about 19% of their flights experiencing any sort of delay.

28 flights are operational daily from London Heathrow Airport to Portugal as of November 2026. The most popular departure time for this route is 12:00, with 34% of flights per day taking off in the afternoon.

199 flights are operational weekly from London Heathrow Airport to Portugal as of November 2026. The most popular departure day for this route is Mon, with 31% of flights per week taking off on this day.