Question 1

What are the cheapest airlines to fly from London Heathrow Airport to Southeast Asia one-way?

Accepted Answer

The cheapest airline one-way is Hainan Airlines, with whom users have recently found tickets for as low as £185. However, be on the lookout for offers from SAUDIA and Air China, as they are both options that can get you from London Heathrow Airport to Southeast Asia for a low price.

Question 2

How far ahead should I book a flight from London Heathrow Airport to Southeast Asia?

Accepted Answer

The price you pay for your flight from London Heathrow Airport to Southeast Asia may vary depending on when you book. For the best chance of a lower fare, look to book 81 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Question 3

What is the cheapest month to book a flight from London Heathrow Airport to Southeast Asia?

Accepted Answer

Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of £635). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of £1,053). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 4

Weekly flight availability from London Heathrow Airport to Southeast Asia

Accepted Answer

The most flights from LHR to zzYJX are scheduled on a Monday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 on average).

Question 5

E

Accepted Answer

In terms of precipitation, rainfall in Southeast Asia ranges from 10.0 - 320.0 inches per month. September is typically the wettest month, when rainfall can reach 320.0 mm. January is typically the driest time to visit Southeast Asia when rainfall is around 10.0 mm.

Question 6

E

Accepted Answer

If weather is an important factor for your trip to Southeast Asia, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 30.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 26.0 C).

Question 7

What are the most popular routes from London Heathrow Airport to Southeast Asia?

Accepted Answer

While some choose either London Heathrow - Bangkok Don Mueang Intl or London Heathrow - Kuala Lumpur Intl, London Heathrow - Bangkok Suvarnabhumi is the most popular route from London Heathrow Airport to Southeast Asia.

Question 8

What are the cheapest flights from London Heathrow Airport to Southeast Asia?

Accepted Answer

Looking for the cheapest flight from London Heathrow Airport to Southeast Asia? While on average our users pay £1,761, our data indicates the cheapest price to be £489. The most popular route (London Heathrow - Bangkok Suvarnabhumi), is priced around £373.

Question 9

What are the most reliable airlines from London Heathrow Airport to Southeast Asia?

Accepted Answer

The top 3 most reliable airlines when flying from London Heathrow Airport to Southeast Asia are EVA Air (84%), Thai Airways (83%) and Air Canada (79%).

Question 10

What are the most popular airlines that fly from London Heathrow Airport to Southeast Asia?

Accepted Answer

The most popular airlines flying from London Heathrow Airport to Southeast Asia are Etihad Airways, Qatar Airways and Cathay Pacific. Something to consider prior to booking your flight.

Question 11

What is the cheapest time of day to fly from LHR to YJX?

Accepted Answer

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Southeast Asia as you normally would.

Question 12

Can I find deals for flights from Heathrow to Southeast Asia that include hotel bookings?

Accepted Answer

Yes. In addition to deals on Heathrow to Southeast Asia flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 13

How can I find direct flights from Heathrow to Southeast Asia?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Southeast Asia.

Question 14

Can I find deals for business class flights from Heathrow to Southeast Asia?

Accepted Answer

Yes. Cheapflights offers flight deals from Heathrow to Southeast Asia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 15

How does Cheapflights help users find flights from Heathrow to Southeast Asia?

Accepted Answer

When you search for this flight from Heathrow to Southeast Asia, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Question 16

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Southeast Asia?

Accepted Answer

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Southeast Asia from Heathrow.

Question 17

Can Cheapflights find flights from Heathrow to Southeast Asia with no change fees?

Accepted Answer

Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Southeast Asia, users can toggle the no change fees filter when performing a flight search.

Question 18

Can Cheapflights notify me if prices for flights from Heathrow to Southeast Asia become cheaper?

Accepted Answer

Yes! Start tracking prices for Heathrow to Southeast Asia flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

Popular in	December
Cheapest in	September
Average price	£547

Airline	Cheapest	Average	Flexibility	On-time
HK Express	Cheapest£106	Average£128	FlexibilityNo cancel fee	On-time90%	Search HK Express flights
Norse Atlantic UK	Cheapest£294	Average£600	FlexibilityNo cancel fee	On-timeN/A	Search Norse Atlantic UK flights
XiamenAir	Cheapest£301	Average£446	FlexibilityNo cancel fee	On-time49%	Search XiamenAir flights
Royal Jordanian	Cheapest£313	Average£731	FlexibilityNo cancel fee	On-time61%	Search Royal Jordanian flights
Scandinavian Airlines	Cheapest£345	Average£649	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Hainan Airlines	Cheapest£368	Average£439	FlexibilityNo cancel fee	On-time61%	Search Hainan Airlines flights
Riyadh Air	Cheapest£404	Average£559	FlexibilityNo cancel fee	On-timeN/A	Search Riyadh Air flights
Condor	Cheapest£456	Average£609	FlexibilityNo cancel fee	On-time76%	Search Condor flights
ITA Airways	Cheapest£479	Average£555	FlexibilityNo cancel fee	On-time81%	Search ITA Airways flights
KLM	Cheapest£488	Average£908	FlexibilityNo cancel fee	On-time75%	Search KLM flights

Cheap flights from London Heathrow Airport to Southeast Asia

Find flight deals from Heathrow to Southeast Asia

Popular in

Cheapest in

Average price

Cheapflights Insights

How far ahead should I book a flight from London Heathrow Airport to Southeast Asia?

The price you pay for your flight from London Heathrow Airport to Southeast Asia may vary depending on when you book. For the best chance of a lower fare, look to book 81 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from London Heathrow Airport to Southeast Asia?

What is the cheapest time of day to fly from LHR to YJX?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Southeast Asia as you normally would.

Weekly flight availability from London Heathrow Airport to Southeast Asia

The most flights from LHR to zzYJX are scheduled on a Monday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 on average).

Reviews of airlines servicing Southeast Asia

Related info for your journey

What are the cheapest airlines to fly from London Heathrow Airport to Southeast Asia one-way?

What are the most popular routes from London Heathrow Airport to Southeast Asia?

What are the most reliable airlines from London Heathrow Airport to Southeast Asia?

What are the cheapest flights from London Heathrow Airport to Southeast Asia?

Can I find deals for flights from Heathrow to Southeast Asia that include hotel bookings?

How can I find direct flights from Heathrow to Southeast Asia?

Can I find deals for business class flights from Heathrow to Southeast Asia?

What is the cheapest month to book a flight from London Heathrow Airport to Southeast Asia?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Heathrow to Southeast Asia

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Southeast Asia by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to

Book a non-stop flight to one of these other cities located in .

Search flights from Heathrow to Southeast Asia by cabin class

Find flights from Heathrow to Southeast Asia, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Heathrow and Southeast Asia flights

Browse other Heathrow and Southeast Asia flight options. Last updated on 24 September 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Heathrow to Southeast Asia flights

Consider these flights travelling from Heathrow to Southeast Asia.

Top 10 airlines flying from Heathrow to Southeast Asia

Fly with Cheapflights

How does Cheapflights help users find flights from Heathrow to Southeast Asia?

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Southeast Asia?

Can Cheapflights find flights from Heathrow to Southeast Asia with no change fees?

Can Cheapflights notify me if prices for flights from Heathrow to Southeast Asia become cheaper?

100% Free

Book with Flexibility

Travel Smart