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Cheap flights from London to Sylhet from £243

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 19/11. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ZYL
14 Dec — 21 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London to Sylhet Osmani Intl are usually found in September or May, booked 27 days in advance, depart on a Thursday or Wednesday and return on a Monday

Cheap 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 14 November 2025.

Round-trip from

£699

One-way from

£243

Popular in

December

Cheapest in

September

Average price

£970

Good round-trip deal

£824 or less

Good one-way deal

£590 or less
6/5-19/5
  • 6/5-19/5
  • 4 total stops
  • 51h 40m total
  • London to Sylhet
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19/11
  • 19/11
  • 3 total stops
  • 45h 35m total
  • London to Sylhet
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Highest demand for flights based on searches. 15% potential increase in price (£132 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£30 potential savings vs. average return price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from London (LON) to Sylhet Osmani Intl.
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Price to beat on a one-way flight from London (LON) to Sylhet Osmani Intl.
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Find 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 14 November 2025.

Wed 10/1205:55STN - ZYL
3 stops33h 50mMultiple Airlines
Thu 8/108:40ZYL - STN
3 stops32h 30mMultiple Airlines
Deal found 11/11£698
Sat 22/1109:30STN - ZYL
2 stops29h 55mMultiple Airlines
Fri 12/1215:55ZYL - STN
3 stops37h 15mMultiple Airlines
Deal found 10/11£701
Sat 29/1108:05STN - ZYL
2 stops19h 35mMultiple Airlines
Sat 21/215:55ZYL - STN
3 stops25h 30mMultiple Airlines
Deal found 11/11£713
Wed 19/1108:40LGW - ZYL
2 stops45h 10mMultiple Airlines
Wed 3/1220:55ZYL - LGW
2 stops39h 00mMultiple Airlines
Deal found 11/11£718
Tue 18/1114:05LGW - ZYL
2 stops36h 40mMultiple Airlines
Wed 3/1222:10ZYL - LGW
2 stops37h 45mMultiple Airlines
Deal found 11/11£719
Tue 25/1120:30LGW - ZYL
3 stops40h 50mMultiple Airlines
Wed 25/321:05ZYL - LGW
3 stops24h 05mMultiple Airlines
Deal found 13/11£720
Thu 20/1106:20STN - ZYL
2 stops20h 35mMultiple Airlines
Sun 21/1217:10ZYL - STN
3 stops24h 55mMultiple Airlines
Deal found 12/11£721
Wed 19/1110:45STN - ZYL
3 stops46h 45mMultiple Airlines
Sun 8/212:15ZYL - STN
3 stops29h 50mMultiple Airlines
Deal found 11/11£723
Tue 9/1205:55STN - ZYL
2 stops21h 00mMultiple Airlines
Wed 14/115:55ZYL - STN
3 stops25h 50mMultiple Airlines
Deal found 13/11£724
Tue 18/1112:30STN - ZYL
3 stops25h 45mMultiple Airlines
Tue 25/1115:55ZYL - STN
3 stops25h 30mMultiple Airlines
Deal found 10/11£729
Tue 18/1114:55LHR - ZYL
2 stops22h 25mMultiple Airlines
Tue 25/1114:50ZYL - LHR
2 stops37h 50mMultiple Airlines
Deal found 10/11£730
Wed 19/1110:45STN - ZYL
3 stops46h 45mMultiple Airlines
Wed 10/1215:55ZYL - STN
3 stops27h 40mMultiple Airlines
Deal found 12/11£731

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 14 November 2025.
Use the filters below to find and compare flights from London to Sylhet that are best for you.

Fly from

London

Fly to

Sylhet

Route

Depart

Return

Price

LondonSylhet

LGW - ZYL

LGWZYL

London Gatwick

Sat 10/1

13:55-21:10

2 stops25h 15m

Sylhet Osmani Intl

Sun 8/2

12:15-23:55

3 stops41h 40m

£696

LondonSylhet

STN - ZYL

STNZYL

London Stansted

Wed 10/12

05:55-21:45

3 stops33h 50m

Sylhet Osmani Intl

Thu 8/1

08:40-11:10

3 stops32h 30m

£698

LondonSylhet

LGW - ZYL

LGWZYL

London Gatwick

Mon 2/2

07:30-21:45

3 stops32h 15m

Sylhet Osmani Intl

Sun 22/2

12:15-22:15

3 stops40h 00m

£700

LondonSylhet

STN - ZYL

STNZYL

London Stansted

Fri 9/1

05:55-15:30

3 stops27h 35m

Sylhet Osmani Intl

Tue 10/2

15:55-11:45

3 stops25h 50m

£709

LondonSylhet

LGW - ZYL

LGWZYL

London Gatwick

Tue 3/2

14:05-08:45

2 stops36h 40m

Sylhet Osmani Intl

Tue 10/2

22:10-05:55

2 stops37h 45m

£716

LondonSylhet

STN - ZYL

STNZYL

London Stansted

Fri 1/5

11:10-11:50

2 stops19h 40m

Sylhet Osmani Intl

Wed 20/5

12:15-22:10

2 stops38h 55m

£717

LondonSylhet

STN - ZYL

STNZYL

London Stansted

Sat 10/1

05:55-16:25

3 stops28h 30m

Sylhet Osmani Intl

Sat 31/1

15:55-14:35

3 stops28h 40m

£717

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 21/1

14:15-16:40

2 stops20h 25m

Sylhet Osmani Intl

Wed 18/2

21:40-12:15

2 stops20h 35m

£720

LondonSylhet

STN - ZYL

STNZYL

London Stansted

Fri 1/5

06:15-16:00

2 stops28h 45m

Sylhet Osmani Intl

Sat 16/5

10:05-16:50

2 stops35h 45m

£724

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Tue 10/3

14:15-21:10

2 stops24h 55m

Sylhet Osmani Intl

Tue 7/4

08:20-12:40

2 stops33h 20m

£725

Flights are sorted by cheapest return flights first.

Deals found on 11/11

Showing 1-10 of 60 results
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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

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

Use this chart to determine the optimal time to book a return flight from London to Sylhet. Price data was last updated on 7 November 2025.

To ensure you get the cheapest price possible for a flight from London to Sylhet, you should look to book at least 27 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.

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

Currently, April is the cheapest month in which you can book a flight from London to Sylhet (average of £542). Flying from London to Sylhet in December is currently the most expensive (average of £929). 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 14 November 2025.

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?

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 14 November 2025.
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
6.7
Okay
23 reviews
Check prices

Overall

6.7

Crew

7.5

Comfort

6.3

Entertainment

6.0

Boarding

7.0

Food

6.8
Biman Bangladesh
6.7
Okay
23 reviews
Biman Bangladesh
6.7
Okay
23 reviews
Check prices

Overall

6.7

Crew

7.5

Comfort

6.3

Entertainment

6.0

Boarding

7.0

Food

6.8

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.

  • 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 £670 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 £1,383 for a flight from London to Sylhet. The cheapest flight overall is £510 while the most popular route, (London Heathrow - Sylhet Osmani Intl) is currently priced at £684.

  • 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, April is the cheapest month in which you can book a flight from London to Sylhet (average of £542). Flying from London to Sylhet in December is currently the most expensive (average of £929). 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 14 November 2025.
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 14 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Biman BangladeshCheapest£670Average£905FlexibilityNo 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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