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Cheap flights from London Heathrow Airport to Sylhet from £312

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 13/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ZYL
14 Jul — 21 Jul1
1 adult

Cheapflights Tip: The best prices from London Heathrow to Sylhet Osmani Intl are usually found in September or May, booked 72 days in advance, depart on a Wednesday or Sunday and return on a Tuesday

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 9 July 2025.

Round-trip from

£738

One-way from

£312

Popular in

December

Cheapest in

September

Average price

£1,041

Good round-trip deal

£759 or less

Good one-way deal

£523 or less
Biman Bangladesh
  • Biman Bangladesh
  • 7/9-22/10
  • Nonstop
  • 21h 05m total
  • London to Sylhet
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13/8
  • 13/8
  • 3 total stops
  • 41h 45m total
  • London to Sylhet
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£99 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 July 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 9 July 2025.

Wed 5/1116:35LHR - ZYL
2 stops37h 15mMultiple Airlines
Wed 19/1116:25ZYL - LHR
2 stops47h 35mMultiple Airlines
Deal found 7/7£730
Sun 7/918:20LHR - ZYL
Nonstop9h 45mBiman Bangladesh
Wed 22/1009:35ZYL - LHR
Nonstop11h 20mBiman Bangladesh
Deal found 8/7£738

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 9 July 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

Wed 5/11

16:35-11:50

2 stops37h 15m

Sylhet Osmani Intl

Wed 19/11

16:25-10:00

2 stops47h 35m

£730

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Sun 7/9

18:20-09:05

Nonstop9h 45m

Sylhet Osmani Intl

Wed 22/10

09:35-15:55

Nonstop11h 20m

£738

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 13/8

19:15-18:00

3 stops41h 45m

£312

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Sat 27/9

18:20-09:05

Nonstop9h 45m

£501

Flights are sorted by cheapest return flights first.

Deals found on 8/7

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 27 June 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 72 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 9 July 2025.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Sylhet at midday. If you’re flexible enough to do this you can expect to save up to 6% 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.

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

    Currently priced at £738, 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 12% 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 £1,536, our data indicates the cheapest price to be £492. The most popular route (London Heathrow - Sylhet Osmani Intl), is priced around £650.

  • 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

Browse thousands of different options on Cheapflights for your next trip

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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 9 July 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 9 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Biman BangladeshCheapest£626Average£825FlexibilityNo 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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