Cheap flights from Perth to London from $636

The cheapest month to fly to London from Perth is in February. Flight prices, which tend to average around $1,117, are often lower during this time because this is during the off-season. The month of March is another great option to travel to London, with average flight prices from Perth averaging around $1,138.

The cheapest day to depart from Perth to London is on a Sunday. Travelers who choose to depart for London on a Sunday will often find tickets for as low as $1,550. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $2,169. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

Flying to London from Perth in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $1,826 when looking at flights departing in the afternoon. Flights to London are more costly in the evening, with an average ticket price of $1,869. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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 $1,369 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Perth for as low as $1,256 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 13% on your flight if you consider stops on a Perth to London flight.

As of August 2026, prices for Perth to London flights are approximately 15% cheaper when compared to flights at the same time last year.

Historically, on average around 10% 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 186 minutes.

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

Wednesday is statistically the day of the week which experiences the fewest number of 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 least number of delays on this route over the last 12 months; with about 10% of their flights experiencing any sort of delay.

Singapore (SIN) was the most common stop: 38% of momondo users choosing 1-stop flights on this route connected there.

Flights via Kuala Lumpur (KUL) offer the lowest average round-trip price of $1,070.

Flights connecting via Singapore (SIN) have the shortest average one-way travel time: 20h 02m.

Kuala Lumpur (KUL) has the shortest average layover time for this route: 1h 25m.