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Cheap flights from London Heathrow Airport to Sylhet from £396

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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ZYL
12 Oct — 19 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from London Heathrow to Sylhet Osmani Intl are usually found in September or May, booked 19 days in advance, depart on a Wednesday or Saturday and return on a Monday

Cheap flight deals from Heathrow to Sylhet

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) 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 12 September 2025.

Round-trip from

£650

One-way from

£396

Popular in

December

Cheapest in

September

Average price

£698

Good round-trip deal

£701 or less

Good one-way deal

£490 or less
1/1-31/1
  • 1/1-31/1
  • 4 total stops
  • 56h 50m total
  • London to Sylhet
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1/11
  • 1/11
  • 3 total stops
  • 30h 25m total
  • London to Sylhet
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Highest demand for flights based on searches. 14% potential increase in price (£109 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£29 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 Heathrow to Sylhet Osmani Intl.
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Price to beat on a one-way flight from London Heathrow to Sylhet Osmani Intl.
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Find flight deals from Heathrow to Sylhet

Cheapest flights from Heathrow to Sylhet
Explore the most affordable flight options available from Heathrow to Sylhet. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

Sat 20/918:20LHR - ZYL
Nonstop9h 45mBiman Bangladesh
Fri 10/1009:35ZYL - LHR
Nonstop11h 20mBiman Bangladesh
Deal found 10/9£650
Wed 3/1206:00LHR - ZYL
2 stops20h 00mMultiple Airlines
Tue 9/1208:30ZYL - LHR
3 stops35h 15mMultiple Airlines
Deal found 10/9£662
Thu 9/1019:40LHR - ZYL
Nonstop9h 45mBiman Bangladesh
Thu 16/1010:45ZYL - LHR
Nonstop11h 20mBiman Bangladesh
Deal found 11/9£667
Thu 11/919:40LHR - ZYL
Nonstop9h 45mBiman Bangladesh
Thu 9/1010:45ZYL - LHR
Nonstop11h 20mBiman Bangladesh
Deal found 11/9£668
Fri 10/1006:30LHR - ZYL
3 stops23h 50mMultiple Airlines
Fri 17/1008:05ZYL - LHR
3 stops27h 55mMultiple Airlines
Deal found 10/9£670
Fri 10/1018:20LHR - ZYL
Nonstop9h 45mBiman Bangladesh
Fri 17/1009:35ZYL - LHR
Nonstop11h 20mBiman Bangladesh
Deal found 10/9£672
Thu 9/1019:40LHR - ZYL
Nonstop9h 45mBiman Bangladesh
Thu 23/1010:45ZYL - LHR
Nonstop11h 20mBiman Bangladesh
Deal found 10/9£674
Fri 19/918:20LHR - ZYL
Nonstop9h 45mBiman Bangladesh
Thu 23/1010:45ZYL - LHR
Nonstop11h 20mBiman Bangladesh
Deal found 10/9£675
Sun 28/906:30LHR - ZYL
3 stops23h 50mMultiple Airlines
Sun 12/1013:50ZYL - LHR
3 stops25h 25mMultiple Airlines
Deal found 10/9£688
Thu 9/1006:30LHR - ZYL
3 stops23h 50mMultiple Airlines
Thu 16/1011:40ZYL - LHR
3 stops24h 50mMultiple Airlines
Deal found 11/9£691

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow 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 12 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Sylhet that are best for you.

Fly from

Heathrow

Fly to

Sylhet

Route

Depart

Return

Price

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Thu 9/10

06:30-11:20

3 stops23h 50m

Sylhet Osmani Intl

Thu 16/10

11:40-07:30

3 stops24h 50m

£691

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 8/10

18:20-09:05

Nonstop9h 45m

Sylhet Osmani Intl

Sat 6/12

10:25-16:05

Nonstop11h 40m

£698

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 8/10

18:20-09:05

Nonstop9h 45m

Sylhet Osmani Intl

Sun 7/12

10:25-16:05

Nonstop11h 40m

£719

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Sat 4/10

18:20-09:05

Nonstop9h 45m

Sylhet Osmani Intl

Sun 7/12

10:25-16:05

Nonstop11h 40m

£719

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Sun 5/10

18:20-09:05

Nonstop9h 45m

Sylhet Osmani Intl

Sun 19/10

09:35-15:55

Nonstop11h 20m

£720

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 7/1

15:45-16:00

2 stops18h 15m

Sylhet Osmani Intl

Thu 29/1

10:55-13:45

2 stops32h 50m

£737

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 14/1

10:45-11:50

2 stops43h 05m

Sylhet Osmani Intl

Wed 18/3

12:50-13:45

2 stops30h 55m

£737

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Mon 5/1

15:45-19:45

2 stops46h 00m

Sylhet Osmani Intl

Tue 10/2

12:15-13:45

2 stops31h 30m

£739

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Mon 24/11

15:45-11:50

2 stops38h 05m

Sylhet Osmani Intl

Thu 29/1

16:25-13:45

2 stops27h 20m

£740

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Sun 15/2

15:45-16:00

2 stops42h 15m

Sylhet Osmani Intl

Sat 28/2

08:40-13:45

2 stops35h 05m

£754

Flights are sorted by cheapest return flights first.

Deals found on 10/9

Showing 1-10 of 18 results
1
2

Best time to book a flight from Heathrow to Sylhet

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

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

Use this chart to determine the optimal time to book a return flight from Heathrow to Sylhet. Price data was last updated on 29 August 2025.

To ensure you get the cheapest price possible for a flight from London Heathrow Airport 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 Heathrow Airport to Sylhet?

Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Sylhet (average of £842). Flying from London Heathrow Airport 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 LHR to ZYL?

Find hourly flight availability from Heathrow 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 12 September 2025.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Sylhet in the afternoon. If you’re flexible enough to do this you can expect to save up to 4% on your trip compared to booking a flight in the morning.

Related info for your journey

Find useful and relevant information for your journey from Heathrow 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 Heathrow?

    Located just 4.3 mi from the city center, Sylhet Osmani Intl is the airport most travelers will use when flying to Sylhet from London Heathrow. Booking flights from London Heathrow to Osmani Intl (ZYL) should be relatively easy as there are 0 daily inbound flights from London Heathrow from 1 airline.

  • How long is the flight from London Heathrow Airport to Sylhet?

    Airlines like Biman Bangladesh fly from London Heathrow Airport to Sylhet in about 9h 45m. The time it takes to get you to your destination is usually consistent. Airlines will cover a distance of 4979 mi. All flights are typically direct.

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

    Currently priced at £649, Biman Bangladesh will fly you from London Heathrow Airport to Sylhet and back. In addition to Biman Bangladesh, many other airlines offer competitively priced options for your trip. Biman Bangladesh is priced at 25% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest flights from London Heathrow Airport to Sylhet?

    Looking for the cheapest flight from London Heathrow Airport to Sylhet? While on average our users pay £1,108, our data indicates the cheapest price to be £438. The most popular route (London Heathrow - Sylhet Osmani Intl), is priced around £581.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Heathrow 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 Heathrow Airport to Sylhet?

    Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Sylhet (average of £842). Flying from London Heathrow Airport 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

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Fly from Heathrow to Sylhet on these airlines

Choose from the following airlines for your flight from Heathrow to Sylhet. Flights are based on user searches made on Cheapflights and were last updated on 12 September 2025.
Biman Bangladesh flights from London Heathrow to Sylhet Osmani Intl

Top airline flying from Heathrow to Sylhet

Discover the top airline that operate flights from Heathrow 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 12 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Biman BangladeshCheapest£649Average£861FlexibilityNo 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 Heathrow to Sylhet?

Cheapflights makes it easy to find Heathrow to Sylhet flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Heathrow 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 Heathrow.

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

Yes! Cheapflights helps users easily find flights from Heathrow to Sylhet with no change fees.

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

Not ready to book yet? You can track prices for flights from Heathrow to Sylhet on Cheapflights with our Price Alert feature and get notified when better prices are available.

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