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Cheap flights from London Heathrow Airport to Sylhet from £292

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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ZYL
1 Nov — 8 Nov1
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 Thursday or Wednesday 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 2 October 2025.

Round-trip from

£655

One-way from

£292

Popular in

December

Cheapest in

September

Average price

£809

Good round-trip deal

£686 or less

Good one-way deal

£488 or less
20/1-7/2
  • 20/1-7/2
  • 6 total stops
  • 64h 00m total
  • London to Sylhet
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9/10
  • 9/10
  • 3 total stops
  • 29h 50m total
  • London to Sylhet
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Highest demand for flights based on searches. 14% potential increase in price (£114 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 October 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

Enter your travel dates to find the best prices.

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 2 October 2025.

Mon 6/1006:30LHR - ZYL
3 stops28h 30mMultiple Airlines
Thu 16/1012:15ZYL - LHR
3 stops24h 15mMultiple Airlines
Deal found 29/9£669
Thu 9/1019:40LHR - ZYL
Nonstop9h 45mBiman Bangladesh
Thu 16/1010:45ZYL - LHR
Nonstop11h 20mBiman Bangladesh
Deal found 30/9£676
Thu 30/1014:15LHR - ZYL
2 stops23h 15mMultiple Airlines
Thu 6/1109:15ZYL - LHR
3 stops33h 00mMultiple Airlines
Deal found 30/9£684
Fri 14/1111:30LHR - ZYL
3 stops23h 50mMultiple Airlines
Fri 21/1108:30ZYL - LHR
3 stops35h 40mMultiple Airlines
Deal found 30/9£687
Fri 31/1011:30LHR - ZYL
3 stops23h 50mMultiple Airlines
Wed 19/1108:30ZYL - LHR
3 stops43h 10mMultiple Airlines
Deal found 30/9£693
Thu 2/1019:40LHR - ZYL
Nonstop9h 45mBiman Bangladesh
Fri 17/1009:35ZYL - LHR
Nonstop11h 20mBiman Bangladesh
Deal found 30/9£695
Tue 28/1014:15LHR - ZYL
2 stops24h 00mMultiple Airlines
Tue 4/1109:15ZYL - LHR
2 stops34h 45mMultiple Airlines
Deal found 30/9£699
Thu 16/1006:30LHR - ZYL
3 stops28h 30mMultiple Airlines
Wed 12/1108:30ZYL - LHR
3 stops43h 55mMultiple Airlines
Deal found 1/10£700
Mon 1/1214:15LHR - ZYL
2 stops24h 05mMultiple Airlines
Mon 26/108:30ZYL - LHR
2 stops29h 00mMultiple Airlines
Deal found 1/10£701
Wed 8/1018:20LHR - ZYL
Nonstop9h 45mBiman Bangladesh
Thu 16/1010:45ZYL - LHR
Nonstop11h 20mBiman Bangladesh
Deal found 29/9£701
Mon 6/1006:30LHR - ZYL
3 stops34h 00mMultiple Airlines
Mon 13/1011:50ZYL - LHR
3 stops35h 50mMultiple Airlines
Deal found 1/10£703

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 2 October 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 7/1

11:30-17:20

3 stops23h 50m

Sylhet Osmani Intl

Fri 30/1

08:30-16:05

3 stops37h 35m

£664

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 7/1

11:30-20:20

3 stops26h 50m

Sylhet Osmani Intl

Sat 14/2

08:30-13:45

3 stops35h 15m

£679

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Tue 6/1

08:40-13:20

2 stops22h 40m

Sylhet Osmani Intl

Wed 4/2

08:30-06:25

2 stops27h 55m

£718

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 12/11

09:30-15:30

2 stops24h 00m

Sylhet Osmani Intl

Wed 15/4

16:25-15:20

2 stops51h 55m

£720

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Mon 1/12

06:35-20:20

3 stops31h 45m

Sylhet Osmani Intl

Mon 26/1

08:30-13:45

3 stops35h 15m

£725

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 7/1

08:40-15:30

2 stops24h 50m

Sylhet Osmani Intl

Thu 29/1

15:55-14:00

2 stops28h 05m

£739

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Tue 3/2

14:15-20:15

2 stops24h 00m

Sylhet Osmani Intl

Tue 10/2

12:15-06:25

2 stops24h 10m

£739

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Mon 5/1

08:05-15:30

2 stops25h 25m

Sylhet Osmani Intl

Tue 10/2

15:55-06:25

2 stops20h 30m

£739

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Thu 9/10

06:30-17:20

3 stops29h 50m

£292

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 3/12

08:40-15:30

2 stops24h 50m

£412

Flights are sorted by cheapest return flights first.

Deals found on 29/9

Showing 1-10 of 16 results
1
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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 26 September 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 2 October 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 6% on your trip compared to booking a flight at midday.

How much does it cost for a return flight from London Heathrow Airport 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 2 October 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Sylhet, such as Biman Bangladesh. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Biman Bangladesh
6.7
Okay
23 reviews
Check prices

Comfort

6.3

Entertainment

6.0

Overall

6.7

Food

6.8

Boarding

7.0

Crew

7.5
Biman Bangladesh
6.7
Okay
23 reviews
Biman Bangladesh
6.7
Okay
23 reviews
Check prices

Comfort

6.3

Entertainment

6.0

Overall

6.7

Food

6.8

Boarding

7.0

Crew

7.5

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 £653, 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 26% 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 £1,139, our data indicates the cheapest price to be £465. The most popular route (London Heathrow - Sylhet Osmani Intl), is priced around £642.

  • 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 2 October 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 2 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Biman BangladeshCheapest£653Average£879FlexibilityNo cancel feeOn-time45%
Search Biman Bangladesh flights

Fly with Cheapflights

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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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