Cheap flights from London to Portugal from £20

The month of January is, on average, the cheapest month to fly to Portugal from London, with most prices found around £107. If you are unable to visit Portugal during the month of January, then departing from London during the month November is also very affordable. Most momondo users find prices during this month for around £126.

The cheapest day to depart from London to Portugal is on a Thursday when prices can be found for as low as £293. Flights from London to Portugal on a Monday will generally be more expensive and average around £335. 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 £254. Flights to Portugal are more costly in the morning, with an average ticket price of £339. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from London Luton to Faro for the best London - Portugal flight prices

You are more likely to see cheaper flights to Portugal from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around £207 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 for as low as £190 on momondo.

There are 4 cabin classes available to choose from on London to Portugal flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

easyJet, Ryanair, and British Airways are the most popular carriers operating from London to Portugal

TAP AIR PORTUGAL, easyJet and Ryanair are the top three most popular airlines that fly to Portugal from London according to our data. TAP AIR PORTUGAL is the first choice among our users, with 34% of people opting to fly with this airline when travelling to Portugal. Keep in mind that there are 13 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

Historically, on average around 21% 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 116 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the early afternoon 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. Saturday 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 18% of their flights experiencing any sort of delay.

35 flights are operational daily from London to Portugal as of October 2026. The most popular departure time for this route is 18:00, with 36% of flights per day taking off at midday.

The number of flights available between London and Portugal is 249 per week as of October 2026. The most frequent departure day is Fri, with 49% of weekly flights leaving on this day.