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Cheap flights from London to Sumatra from £409

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — KNO
15 Jun — 22 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Sumatra

Enter your travel dates to find the best prices.

Cheapest flights from London to Sumatra
Explore the most affordable flight options available from London to Sumatra. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 May 2026.

Sat 20/618:40
LHR
-
KNO
2 stops31h 20m
SWISS
Thu 16/708:50
KNO
-
LHR
2 stops40h 30m
SWISS
Deal found 14/5£720
Sun 21/608:45
LHR
-
KNO
2 stops48h 30m
Multiple Airlines
Mon 6/720:25
KNO
-
LHR
2 stops43h 30m
Multiple Airlines
Deal found 12/5£727
Sat 3/1020:50
LHR
-
KNO
2 stops36h 10m
Multiple Airlines
Fri 6/1116:50
KNO
-
LHR
2 stops32h 35m
Multiple Airlines
Deal found 11/5£740
Fri 12/620:50
LHR
-
KNO
2 stops36h 10m
Multiple Airlines
Sat 12/915:45
KNO
-
LHR
2 stops44h 45m
Multiple Airlines
Deal found 16/5£746
Tue 1/920:50
LHR
-
KNO
2 stops36h 10m
Multiple Airlines
Tue 15/909:20
KNO
-
LHR
2 stops39h 50m
Multiple Airlines
Deal found 14/5£764
Sat 3/1010:25
LGW
-
KNO
2 stops26h 50m
Multiple Airlines
Fri 6/1116:40
KNO
-
LGW
2 stops20h 45m
Multiple Airlines
Deal found 11/5£770
Sun 21/606:10
LGW
-
KNO
3 stops23h 45m
Multiple Airlines
Mon 6/709:20
KNO
-
LGW
2 stops28h 00m
Multiple Airlines
Deal found 14/5£775
Sat 20/619:40
LGW
-
KNO
3 stops37h 35m
Multiple Airlines
Thu 16/715:00
KNO
-
LGW
2 stops22h 05m
Multiple Airlines
Deal found 14/5£789
Thu 21/519:25
LHR
-
KNO
2 stops37h 35m
Qatar Airways
Wed 27/509:20
KNO
-
LHR
2 stops28h 40m
Qatar Airways
Deal found 11/5£798
Wed 9/922:05
LHR
-
KNO
1 stop27h 55m
Singapore Airlines
Tue 22/920:25
KNO
-
LHR
1 stop29h 05m
Singapore Airlines
Deal found 15/5£823
Tue 18/812:25
LGW
-
KNO
3 stops44h 50m
Multiple Airlines
Wed 2/912:30
KNO
-
LGW
2 stops25h 00m
Multiple Airlines
Deal found 13/5£826
Tue 18/810:25
LGW
-
KNO
2 stops29h 55m
Multiple Airlines
Tue 1/906:10
KNO
-
LGW
2 stops31h 15m
Multiple Airlines
Deal found 13/5£838

Find flight deals from London to Sumatra

Keep the following information in mind while searching for London to Sumatra flight deals. Data was last updated 16 May 2026.

Round-trip from

£720

One-way from

£409

Popular in

July

Cheapest in

November

Average price

£610
SWISS
  • SWISS
  • 20/6-16/7
  • 4 total stops
  • 71h 50m total
  • London to Sumatra
Search Deals
12/6
  • 12/6
  • 3 total stops
  • 34h 35m total
  • London to Sumatra
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£140 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£33 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Sumatra that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 16 May 2026.
Use the filters below to find and compare flights from London to Sumatra that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonMedan

LHR - KNO

LHRKNO

London Heathrow

Sat 20/6

18:40-08:00

2 stops31h 20m

Medan Kuala Namu Intl

Thu 16/7

08:50-19:20

2 stops40h 30m

£720

LondonMedan

LGW - KNO

LGWKNO

London Gatwick

Sat 3/10

10:25-19:15

2 stops26h 50m

Medan Kuala Namu Intl

Fri 6/11

16:40-06:25

2 stops20h 45m

£770

LondonMedan

LGW - KNO

LGWKNO

London Gatwick

Sun 21/6

07:30-11:55

2 stops22h 25m

Medan Kuala Namu Intl

Mon 6/7

17:50-09:55

2 stops22h 05m

£797

LondonMedan

LHR - KNO

LHRKNO

London Heathrow

Wed 9/9

22:05-08:00

1 stop27h 55m

Medan Kuala Namu Intl

Tue 22/9

20:25-19:30

1 stop29h 05m

£823

LondonMedan

LGW - KNO

LGWKNO

London Gatwick

Tue 18/8

10:25-22:20

2 stops29h 55m

Medan Kuala Namu Intl

Tue 1/9

06:10-07:25

2 stops31h 15m

£838

LondonMedan

LGW - KNO

LGWKNO

London Gatwick

Tue 1/9

13:15-15:15

1 stop20h 00m

Medan Kuala Namu Intl

Tue 15/9

16:00-06:55

1 stop20h 55m

£841

LondonMedan

LHR - KNO

LHRKNO

London Heathrow

Sat 3/10

22:15-15:15

2 stops35h 00m

Medan Kuala Namu Intl

Fri 6/11

16:40-15:25

1 stop29h 45m

£851

LondonMedan

LHR - KNO

LHRKNO

London Heathrow

Tue 1/9

11:20-19:35

1 stop26h 15m

Medan Kuala Namu Intl

Tue 15/9

20:25-19:30

1 stop29h 05m

£856

LondonMedan

LGW - KNO

LGWKNO

London Gatwick

Sat 13/6

11:35-22:20

2 stops28h 45m

Medan Kuala Namu Intl

Sat 20/6

06:10-06:40

2 stops30h 30m

£856
Fastest return journey

LondonMedan

LGW - KNO

LGWKNO

London Gatwick

Wed 9/9

10:00-08:00

1 stop16h 00m

Medan Kuala Namu Intl

Tue 22/9

16:00-06:55

1 stop20h 55m

£858

Flights are sorted by cheapest return flights first.

Deals found on 16/5

Showing 1-10 of 34 resultsSorted by cheapest first
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Best time to book a flight from London to Sumatra

Have a flexible travel schedule? Discover the best time to fly to Sumatra from London with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London to Sumatra

What is the cheapest month to book a flight from London to Sumatra?

Currently, May is the cheapest month in which you can book a flight from London to Sumatra (average of £361). Flying from London to Sumatra in July is currently the most expensive (average of £1,009). 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.

Reviews of airlines servicing Sumatra

Get insights into the airlines that provide service to Sumatra. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sumatra. Reviews last updated 16 May 2026.
Get a feel of what it's like to fly with Singapore Airlines and Etihad Airways from London to Sumatra by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.2
Very Good
1,517 reviews
Check prices

Overall

8.2

Food

7.8

Boarding

8.3

Crew

8.6

Comfort

8.0

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
Singapore Airlines
8.2
Very Good
1,517 reviews
Singapore Airlines
8.2
Very Good
1,517 reviews
Check prices

Overall

8.2

Food

7.8

Boarding

8.3

Crew

8.6

Comfort

8.0

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
Etihad Airways
7.3
Good
1,439 reviews
Singapore Airlines
8.2
Very Good
1,517 reviews
Check prices

Overall

8.2

Food

7.8

Boarding

8.3

Crew

8.6

Comfort

8.0

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.

Related info for your journey

Find useful and relevant information for your journey from London to Sumatra. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from London to Sumatra?

    A quick flight from London to Sumatra can take about 27h 55m. SWISS provides one of the quickest options available for as low as £823. The distance from London to Sumatra is about 6416 mi. This flight may include one or multiple stops.

  • What are the most popular routes from London to Sumatra?

    While some choose either London Heathrow - Medan Kuala Namu Intl or London City - Medan Kuala Namu Intl, London Gatwick - Medan Kuala Namu Intl is the most popular route from London to Sumatra.

  • Can I find deals for flights from London to Sumatra that include hotel bookings?

    Yes. In addition to deals on London to Sumatra flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Sumatra?

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

  • Can I find deals for business class flights from London to Sumatra?

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

  • What is the cheapest month to book a flight from London to Sumatra?

    Currently, May is the cheapest month in which you can book a flight from London to Sumatra (average of £361). Flying from London to Sumatra in July is currently the most expensive (average of £1,009). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from London to Sumatra

Discover the top 3 airlines that operate flights from London to Sumatra. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 16 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Etihad AirwaysCheapest£478Average£789FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Malaysia AirlinesCheapest£547Average£676FlexibilityNo cancel feeOn-time67%
Search Malaysia Airlines flights
Singapore AirlinesCheapest£578Average£828FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Sumatra?

Deals for London to Sumatra flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from London to Sumatra?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from London to Sumatra for you. Better yet — we are completely free to use.

Can Cheapflights find flights from London to Sumatra with no change fees?

Yes, we can. To see specific flights from London to Sumatra with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from London to Sumatra become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Sumatra from London today and book when prices fit your budget.

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