Cheap flights from Perth to London from £405

The cheapest month to fly to London from Perth is in March. Flight prices, which tend to average around £863, are often lower during this time because this is during the off-season. The month of February is another great option to travel to London, with average flight prices from Perth averaging around £865.

Our data shows that Saturday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £1,234. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Perth to London for around £2,108.

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £1,189. Flights at midday are often more expensive, with an average ticket price of £1,912.

Fly from Perth to London Heathrow for the best Perth - London flight prices

You are more likely to see cheaper flights to London from Perth when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £1,037 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Perth for as low as £938 on momondo.

There are 2 cabin classes available to choose from on Perth to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 6% on your flight if you consider stops on a Perth to London flight.

As of September 2026, prices for Perth to London flights are approximately 14% cheaper when compared to flights at the same time last year.

Singapore Airlines, Cathay Pacific, and Emirates are the most popular carriers operating from Perth to London

Qantas Airways, Singapore Airlines and Malaysia Airlines are the top three most popular airlines that fly to London from Perth according to our data. Qantas Airways is the first choice among our users, with 45% of people opting to fly with this airline when travelling to London. Keep in mind that there are 6 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

Historically, on average around 11% of flights between Perth and London have experienced a delay on any given week. The average delay length over the past 12 months has been 139 minutes.

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

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

According to our data, Qantas Airways have had the fewest delays on this route over the last 12 months, with about 11% of their flights experiencing any sort of delay.

Dubai (DXB) was the most common stop: 36% of momondo users choosing one-stop flights on this route connected there.

Flights via Doha (DOH) offer the lowest average return price of £639.

Flights connecting via Singapore (SIN) have the shortest average one-way travel time: 20h 38m.

Singapore (SIN) has the shortest average stopover time for this route: 1h 17m.