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Cheap flights from London to Sylhet from £422

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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ZYL
28 Jul — 4 Aug1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Sylhet Osmani Intl are usually found in September or February, booked 70 days in advance, depart on a Thursday or Saturday and return on a Monday

Cheap flight deals from London to Sylhet

Enter your travel dates to find the best prices.

Cheapest flights from London to Sylhet
Explore the most affordable flight options available from London to Sylhet. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 June 2026.

Thu 17/913:50
LHR
-
ZYL
2 stops19h 55m
Multiple Airlines
Mon 21/912:15
ZYL
-
LHR
2 stops28h 15m
Multiple Airlines
Deal found 26/6£769
Sun 29/1114:15
LHR
-
ZYL
2 stops20h 25m
Multiple Airlines
Sun 27/1221:40
ZYL
-
LHR
2 stops39h 50m
Multiple Airlines
Deal found 23/6£770
Fri 23/1015:35
LHR
-
ZYL
2 stops18h 10m
Qatar Airways
Fri 6/1109:55
ZYL
-
LHR
2 stops42h 00m
Qatar Airways
Deal found 25/6£771
Wed 1/709:00
LGW
-
ZYL
2 stops30h 00m
Multiple Airlines
Wed 29/707:55
ZYL
-
LGW
2 stops27h 45m
Multiple Airlines
Deal found 26/6£772
Sat 31/1008:40
LHR
-
ZYL
2 stops48h 20m
Qatar Airways
Sat 7/1110:55
ZYL
-
LHR
2 stops41h 00m
Qatar Airways
Deal found 25/6£772
Wed 8/709:00
LGW
-
ZYL
2 stops24h 45m
Multiple Airlines
Wed 29/707:55
ZYL
-
LGW
2 stops27h 45m
Multiple Airlines
Deal found 28/6£773
Sun 28/608:05
LHR
-
ZYL
2 stops24h 45m
Multiple Airlines
Fri 10/712:15
ZYL
-
LHR
3 stops35h 30m
Multiple Airlines
Deal found 24/6£773
Sat 5/912:30
LHR
-
ZYL
2 stops21h 15m
Multiple Airlines
Thu 17/912:15
ZYL
-
LHR
2 stops24h 15m
Multiple Airlines
Deal found 26/6£774
Sun 15/1108:40
LGW
-
ZYL
2 stops24h 20m
Qatar Airways
Sun 13/1214:50
ZYL
-
LGW
2 stops21h 05m
Qatar Airways
Deal found 25/6£776
Wed 18/1118:55
LHR
-
ZYL
2 stops42h 35m
Qatar Airways
Fri 11/1209:55
ZYL
-
LHR
2 stops42h 00m
Qatar Airways
Deal found 27/6£779
Sun 28/608:05
LHR
-
ZYL
2 stops24h 45m
Multiple Airlines
Fri 24/712:15
ZYL
-
LHR
3 stops35h 40m
Multiple Airlines
Deal found 26/6£779
Sun 8/1108:40
LGW
-
ZYL
2 stops24h 20m
Multiple Airlines
Sun 6/1222:10
ZYL
-
LGW
2 stops37h 45m
Multiple Airlines
Deal found 24/6£780

Find flight deals from London to Sylhet

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Sylhet (ZYL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 28 June 2026.

Round-trip from

£769

One-way from

£422

Popular in

December

Cheapest in

September

Average price

£946

Good round-trip deal

£884 or less

Good one-way deal

£587 or less
17/9-21/9
  • 17/9-21/9
  • 4 total stops
  • 48h 10m total
  • London to Sylhet
Search Deals
3/9
  • 3/9
  • 3 total stops
  • 22h 15m total
  • London to Sylhet
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£127 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£32 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from London (LON) to Sylhet Osmani Intl.
Search Deals
Price to beat on a one-way flight from London (LON) to Sylhet Osmani Intl.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Sylhet 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 28 June 2026.
Use the filters below to find and compare flights from London to Sylhet that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSylhet

LGW - ZYL

LGWZYL

London Gatwick

Wed 8/7

09:00-14:45

2 stops24h 45m

Sylhet Osmani Intl

Wed 29/7

07:55-06:40

2 stops27h 45m

£773

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 8/7

08:25-14:45

2 stops25h 20m

Sylhet Osmani Intl

Wed 29/7

07:55-06:30

2 stops27h 35m

£800

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Sun 4/10

15:05-18:10

2 stops22h 05m

Sylhet Osmani Intl

Sun 27/12

14:50-13:25

2 stops28h 35m

£817

LondonSylhet

LGW - ZYL

LGWZYL

London Gatwick

Fri 23/10

09:00-20:00

2 stops30h 00m

Sylhet Osmani Intl

Sun 8/11

22:25-05:55

2 stops37h 30m

£832

LondonSylhet

LGW - ZYL

LGWZYL

London Gatwick

Sat 29/8

09:00-11:50

2 stops21h 50m

Sylhet Osmani Intl

Fri 2/10

08:05-06:40

2 stops27h 35m

£841

LondonSylhet

LGW - ZYL

LGWZYL

London Gatwick

Sun 13/9

09:00-14:45

2 stops24h 45m

Sylhet Osmani Intl

Wed 23/9

15:10-06:40

2 stops20h 30m

£849

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 19/8

08:25-11:50

2 stops22h 25m

Sylhet Osmani Intl

Thu 10/9

12:15-08:00

2 stops24h 45m

£850

LondonSylhet

STN - ZYL

STNZYL

London Stansted

Sat 12/9

13:15-21:30

3 stops27h 15m

Sylhet Osmani Intl

Sun 20/9

16:30-13:35

3 stops26h 05m

£850

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 19/8

08:25-14:45

2 stops25h 20m

Sylhet Osmani Intl

Wed 16/9

15:10-08:00

2 stops21h 50m

£850

LondonSylhet

LGW - ZYL

LGWZYL

London Gatwick

Mon 24/8

09:00-14:45

2 stops24h 45m

Sylhet Osmani Intl

Mon 14/9

12:15-06:40

2 stops23h 25m

£851

Flights are sorted by cheapest return flights first.

Deals found on 25/6

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from London to Sylhet

Have a flexible travel schedule? Discover the best time to fly to Sylhet 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 Sylhet

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

Currently, September is the cheapest month in which you can book a flight from London to Sylhet (average of £741). Flying from London to Sylhet in December is currently the most expensive (average of £1,628). 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.

What is the cheapest time of day to fly from LON to ZYL?

Find hourly flight availability from London to Sylhet. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 28 June 2026.

When flying from London to Sylhet, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost for a return flight from London to Sylhet?

How often are flights from London to Sylhet delayed?

About 26% of weekly flights between London and Sylhet have experienced delays in the past year, with the average delay time being 204 minutes.

What is the most punctual flight time for London to Sylhet flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Sylhet flights?

Over the past year, Biman Bangladesh have had the lowest number of delays on this route, with just 26% of flights being delayed.

How far ahead should I book a flight from London to Sylhet?

To ensure you get the cheapest price possible for a flight from London to Sylhet, you should look to book at least 45 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing Sylhet

Get insights into the airlines that provide service to Sylhet. 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 Sylhet. Reviews last updated 28 June 2026.
Check out reviews from past customers who have flown with Biman Bangladesh from London to Sylhet to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Biman Bangladesh
7.2
Good
28 reviews
Check prices

Overall

7.2

Food

7.2

Crew

7.8

Comfort

6.8

Entertainment

6.6

Boarding

7.4
Biman Bangladesh
7.2
Good
28 reviews
Biman Bangladesh
7.2
Good
28 reviews
Check prices

Overall

7.2

Food

7.2

Crew

7.8

Comfort

6.8

Entertainment

6.6

Boarding

7.4

Related info for your journey

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

  • What airport do you fly into for flights to Sylhet from London?

    If you book a flight to Sylhet from London, you will be flying to Osmani Intl, which is the city’s only airport. Sylhet Osmani Intl (ZYL) is located 4.3 mi from the center of Sylhet. There are 0 flights from London to Osmani Intl per day from 1 airline.

  • How long is the flight from London to Sylhet?

    A quick flight from London to Sylhet can take about 21h 50m. Qatar Airways provides one of the quickest options available for as low as £841. London and Sylhet are separated by a distance of 4974 mi.

  • What is the cheapest airline to fly from London to Sylhet round-trip?

    Our cheapest airline available from London to Sylhet is Biman Bangladesh. Our recent data shows that you can find tickets from as low as £678 on this airline. Biman Bangladesh is 29% cheaper than the average price of flights available within the next 90 days to this destination.

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

    When deciding which route to take from London to Sylhet consider London Heathrow - Sylhet Osmani Intl, London Gatwick - Sylhet Osmani Intl or London Stansted - Sylhet Osmani Intl as they are the most popular.

  • What are the cheapest flights from London to Sylhet?

    On average you can expect to pay £1,161 for a flight from London to Sylhet. The cheapest flight overall is £579 while the most popular route, (London Heathrow - Sylhet Osmani Intl) is currently priced at £685.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London to Sylhet 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 Sylhet?

    Currently, September is the cheapest month in which you can book a flight from London to Sylhet (average of £741). Flying from London to Sylhet in December is currently the most expensive (average of £1,628). 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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Fly from London to Sylhet on these airlines

Choose from the following airlines for your flight from London to Sylhet. Flights are based on user searches made on Cheapflights and were last updated on 28 June 2026.
Biman Bangladesh flights from London to Sylhet Osmani Intl

Top airline flying from London to Sylhet

Discover the top airline that operate flights from London to Sylhet. 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 28 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Biman BangladeshCheapest£678Average£935FlexibilityNo cancel feeOn-time45%
Search Biman Bangladesh 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 Sylhet?

When you search for this flight from London to Sylhet, 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.

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

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 Sylhet from London.

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

Certainly. Search results for flights to Sylhet from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights offers price alerts on London to Sylhet flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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