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Cheap flights from London Heathrow Airport to Sylhet from £339

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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ZYL
9 Nov — 16 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 89 days in advance, depart on a Thursday or Wednesday and return on a Monday

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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 10 October 2025.

Mon 17/1113:30LHR - ZYL
3 stops25h 40mMultiple Airlines
Fri 13/208:35ZYL - LHR
3 stops35h 10mMultiple Airlines
Deal found 8/10£658
Mon 24/1110:00LHR - ZYL
2 stops27h 25mMultiple Airlines
Mon 1/1212:15ZYL - LHR
2 stops30h 00mMultiple Airlines
Deal found 10/10£668
Mon 10/1114:15LHR - ZYL
2 stops23h 10mMultiple Airlines
Tue 25/1107:20ZYL - LHR
2 stops30h 10mMultiple Airlines
Deal found 8/10£671
Thu 13/1110:00LHR - ZYL
2 stops24h 40mMultiple Airlines
Mon 8/1208:35ZYL - LHR
2 stops28h 55mMultiple Airlines
Deal found 8/10£676
Sun 16/1114:15LHR - ZYL
2 stops20h 25mMultiple Airlines
Sun 1/208:35ZYL - LHR
2 stops28h 55mMultiple Airlines
Deal found 10/10£678
Tue 4/1113:30LHR - ZYL
2 stops18h 50mMultiple Airlines
Tue 18/1108:35ZYL - LHR
2 stops32h 30mMultiple Airlines
Deal found 9/10£680
Tue 4/1110:00LHR - ZYL
2 stops29h 10mMultiple Airlines
Mon 10/1108:35ZYL - LHR
2 stops28h 55mMultiple Airlines
Deal found 9/10£693
Tue 25/1110:00LHR - ZYL
2 stops24h 40mMultiple Airlines
Tue 16/1208:35ZYL - LHR
2 stops28h 55mMultiple Airlines
Deal found 9/10£695
Wed 5/1111:30LHR - ZYL
3 stops25h 50mMultiple Airlines
Wed 26/1108:35ZYL - LHR
3 stops35h 55mMultiple Airlines
Deal found 8/10£696
Mon 10/1114:15LHR - ZYL
2 stops24h 55mMultiple Airlines
Mon 24/1108:35ZYL - LHR
2 stops28h 55mMultiple Airlines
Deal found 9/10£697
Thu 27/1110:00LHR - ZYL
2 stops27h 20mMultiple Airlines
Thu 25/1208:35ZYL - LHR
2 stops28h 55mMultiple Airlines
Deal found 10/10£710
Thu 6/1108:50LHR - ZYL
3 stops28h 40mMultiple Airlines
Thu 13/1109:35ZYL - LHR
2 stops32h 30mMultiple Airlines
Deal found 9/10£713

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 10 October 2025.

Round-trip from

£658

One-way from

£339

Popular in

December

Cheapest in

September

Average price

£824

Good round-trip deal

£690 or less

Good one-way deal

£504 or less
17/11-13/2
  • 17/11-13/2
  • 6 total stops
  • 60h 50m total
  • London to Sylhet
Search Deals
5/11
  • 5/11
  • 3 total stops
  • 25h 50m total
  • London to Sylhet
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£131 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£31 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from London Heathrow to Sylhet Osmani Intl.
Search Deals
Price to beat on a one-way flight from London Heathrow to Sylhet Osmani Intl.
Search Deals

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 10 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

Thu 8/1

10:00-21:10

2 stops29h 10m

Sylhet Osmani Intl

Sun 1/2

08:35-07:30

2 stops28h 55m

£692

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Sun 4/1

10:00-21:10

2 stops29h 10m

Sylhet Osmani Intl

Sun 1/2

08:35-07:30

2 stops28h 55m

£693

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Thu 15/1

14:15-16:40

2 stops20h 25m

Sylhet Osmani Intl

Mon 26/1

08:35-07:30

2 stops28h 55m

£694

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Thu 1/1

10:00-21:10

2 stops29h 10m

Sylhet Osmani Intl

Wed 21/1

14:50-12:15

3 stops51h 25m

£694

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Tue 25/11

10:00-16:40

2 stops24h 40m

Sylhet Osmani Intl

Tue 16/12

08:35-07:30

2 stops28h 55m

£695

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Tue 20/1

14:15-16:40

2 stops20h 25m

Sylhet Osmani Intl

Mon 9/2

13:00-07:30

2 stops48h 30m

£695

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Sun 4/1

14:15-16:40

2 stops20h 25m

Sylhet Osmani Intl

Wed 21/1

21:40-12:15

2 stops20h 35m

£696

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Thu 8/1

14:15-16:40

2 stops20h 25m

Sylhet Osmani Intl

Thu 15/1

19:50-20:20

2 stops30h 30m

£718

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Sun 15/3

21:50-15:30

2 stops35h 40m

Sylhet Osmani Intl

Wed 15/4

12:15-06:55

2 stops47h 40m

£734

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Thu 30/10

10:00-19:20

2 stops27h 20m

Sylhet Osmani Intl

Thu 6/11

08:35-07:30

2 stops28h 55m

£737

Flights are sorted by cheapest return flights first.

Deals found on 9/10

Showing 1-10 of 20 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 3 October 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 89 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, April is the cheapest month in which you can book a flight from London Heathrow Airport to Sylhet (average of £539). Flying from London Heathrow Airport to Sylhet in December is currently the most expensive (average of £914). 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 10 October 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Sylhet as you normally would.

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 10 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

Overall

6.7

Boarding

7.0

Crew

7.5

Entertainment

6.0

Comfort

6.3

Food

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

Overall

6.7

Boarding

7.0

Crew

7.5

Entertainment

6.0

Comfort

6.3

Food

6.8

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 £660, 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 27% 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 £1,144, our data indicates the cheapest price to be £476. The most popular route (London Heathrow - Sylhet Osmani Intl), is priced around £637.

  • 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, April is the cheapest month in which you can book a flight from London Heathrow Airport to Sylhet (average of £539). Flying from London Heathrow Airport to Sylhet in December is currently the most expensive (average of £914). 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 10 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 10 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Biman BangladeshCheapest£660Average£890FlexibilityNo 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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