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Cheap flights from London to Sylhet from £244

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 14/1. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ZYL
30 Oct — 6 Nov1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from London to Sylhet Osmani Intl are usually found in September or May, booked 19 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 30 September 2025.

Round-trip from

£648

One-way from

£244

Popular in

December

Cheapest in

September

Average price

£698

Good round-trip deal

£688 or less

Good one-way deal

£489 or less
14/1-7/2
  • 14/1-7/2
  • 5 total stops
  • 55h 15m total
  • London to Sylhet
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14/1
  • 14/1
  • 3 total stops
  • 31h 45m total
  • London to Sylhet
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Highest demand for flights based on searches. 13% potential increase in price (£106 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£27 potential savings vs. average return price).
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Average for round-trip flights in September 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

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 30 September 2025.

Thu 30/1010:00LHR - ZYL
2 stops25h 20mMultiple Airlines
Thu 27/1108:30ZYL - LHR
2 stops29h 00mMultiple Airlines
Deal found 27/9£648
Wed 29/1005:55STN - ZYL
3 stops25h 25mMultiple Airlines
Wed 5/1121:05ZYL - STN
2 stops31h 10mMultiple Airlines
Deal found 29/9£649
Sun 2/1114:15LHR - ZYL
2 stops23h 45mMultiple Airlines
Thu 13/1109:35ZYL - LHR
3 stops32h 40mMultiple Airlines
Deal found 28/9£655
Wed 5/1110:00LHR - ZYL
2 stops25h 20mMultiple Airlines
Thu 13/1108:30ZYL - LHR
2 stops29h 00mMultiple Airlines
Deal found 29/9£658
Tue 25/1110:00LHR - ZYL
2 stops28h 20mMultiple Airlines
Thu 4/1208:30ZYL - LHR
2 stops29h 00mMultiple Airlines
Deal found 26/9£659
Wed 12/1106:35LGW - ZYL
3 stops31h 25mMultiple Airlines
Thu 22/117:50ZYL - LGW
3 stops34h 20mMultiple Airlines
Deal found 29/9£660
Wed 12/1110:45STN - ZYL
3 stops46h 45mMultiple Airlines
Thu 22/117:50ZYL - STN
3 stops23h 35mMultiple Airlines
Deal found 29/9£662
Wed 8/1014:20STN - ZYL
3 stops26h 10mMultiple Airlines
Wed 5/1121:05ZYL - STN
2 stops20h 20mMultiple Airlines
Deal found 28/9£664
Tue 16/1220:30LGW - ZYL
3 stops34h 50mMultiple Airlines
Tue 23/1217:50ZYL - LGW
3 stops34h 15mMultiple Airlines
Deal found 28/9£666
Wed 8/1006:30LHR - ZYL
3 stops29h 50mMultiple Airlines
Wed 15/1011:50ZYL - LHR
3 stops35h 50mMultiple Airlines
Deal found 27/9£668
Wed 1/1018:20LHR - ZYL
Nonstop9h 45mBiman Bangladesh
Fri 10/1009:35ZYL - LHR
Nonstop11h 20mBiman Bangladesh
Deal found 28/9£673
Sun 16/1110:00LHR - ZYL
2 stops28h 00mMultiple Airlines
Thu 27/1109:15ZYL - LHR
3 stops33h 00mMultiple Airlines
Deal found 28/9£675

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 30 September 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

Wed 11/3

10:35-20:00

2 stops27h 25m

Sylhet Osmani Intl

Wed 6/5

12:15-06:55

2 stops47h 40m

£653

LondonSylhet

LGW - ZYL

LGWZYL

London Gatwick

Wed 7/1

06:45-09:45

2 stops21h 00m

Sylhet Osmani Intl

Fri 30/1

13:50-23:00

3 stops39h 10m

£657

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Tue 25/11

10:00-20:20

2 stops28h 20m

Sylhet Osmani Intl

Thu 4/12

08:30-07:30

2 stops29h 00m

£659

LondonSylhet

LGW - ZYL

LGWZYL

London Gatwick

Tue 16/12

20:30-13:20

3 stops34h 50m

Sylhet Osmani Intl

Tue 23/12

17:50-22:05

3 stops34h 15m

£666

LondonSylhet

STN - ZYL

STNZYL

London Stansted

Fri 9/1

06:10-13:20

3 stops25h 10m

Sylhet Osmani Intl

Sun 1/2

17:50-15:55

3 stops28h 05m

£668

LondonSylhet

STN - ZYL

STNZYL

London Stansted

Sun 11/1

05:55-17:20

3 stops29h 25m

Sylhet Osmani Intl

Sun 8/2

13:50-12:05

3 stops28h 15m

£672

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Tue 4/11

14:15-17:20

2 stops21h 05m

Sylhet Osmani Intl

Tue 16/12

08:30-07:30

2 stops29h 00m

£684

LondonSylhet

LGW - ZYL

LGWZYL

London Gatwick

Tue 13/1

09:50-20:20

2 stops28h 30m

Sylhet Osmani Intl

Sat 7/2

17:50-22:05

3 stops34h 15m

£685

LondonSylhet

LGW - ZYL

LGWZYL

London Gatwick

Sun 16/11

17:00-08:15

1 stop33h 15m

Sylhet Osmani Intl

Thu 27/11

12:15-07:40

2 stops25h 25m

£693

LondonSylhet

LGW - ZYL

LGWZYL

London Gatwick

Wed 12/11

08:40-17:20

2 stops26h 40m

Sylhet Osmani Intl

Thu 22/1

08:30-12:35

2 stops34h 05m

£698

Flights are sorted by cheapest return flights first.

Deals found on 28/9

Showing 1-10 of 54 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 26 September 2025.

To ensure you get the cheapest price possible for a flight from London to Sylhet, you should look to book at least 19 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, September is the cheapest month in which you can book a flight from London to Sylhet (average of £842). Flying from London to Sylhet in July is currently the most expensive (average of £1,376). 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 30 September 2025.

It’s optimal to fly from London to Sylhet in the morning. By choosing this option you can save up to 36% on the cost of your flight, compared to a flight at midday.

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

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 £655 on this airline. Biman Bangladesh is 27% 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 £1,142 for a flight from London to Sylhet. The cheapest flight overall is £466 while the most popular route, (London Heathrow - Sylhet Osmani Intl) is currently priced at £642.

  • 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 £842). Flying from London to Sylhet in July is currently the most expensive (average of £1,376). 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 30 September 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 30 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Biman BangladeshCheapest£655Average£881FlexibilityNo 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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