Cheap flights from Perth to London from $818

The month of March is, on average, the cheapest month to fly to London Heathrow Airport from Perth, with most prices found around $1,512. If you aren’t able to travel during the month of March, then book flights to London Heathrow Airport from Perth during February instead. Flights to London Heathrow Airport in February, while not as cheap as those in March, still average around $1,543.

Our data shows that Monday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $2,210. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Perth to London Heathrow Airport for around $2,561.

In the afternoon is the cheapest time of day to fly from Perth to London Heathrow Airport when you can find flight prices for as low as $2,319. Flying to London Heathrow Airport in the afternoon is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to London Heathrow Airport is at midday when prices are around $4,305.

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

You are more likely to see cheaper flights to London Heathrow Airport from Perth when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $1,956 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Perth for as low as $1,863 on momondo.

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

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

Qantas Airways, Malaysia Airlines and Singapore Airlines are the top three most popular airlines that fly to London Heathrow Airport from Perth according to our data. Qantas Airways is the first choice among our users, with 32% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 12 different airlines that fly to London Heathrow Airport 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 211 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.

Sunday 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.

Kuala Lumpur (KUL) was the most common stop: 35% of momondo users choosing one-stop flights on this route connected there.

Flights via Guangzhou (CAN) offer the lowest average return price of $1,450.

Flights connecting via Dubai (DXB) have the shortest average one-way travel time: 21h 28m.

Kuala Lumpur (KUL) has the shortest average stopover time for this route: 1h 59m.

As of July 2026, there are 1 flights per day flying from Perth to London Heathrow Airport. The most common time of day flights depart is 14:00, with 100% of flights taking off in the afternoon.

As of July 2026, 7 flights take off from Perth and land in London Heathrow Airport each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.