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Cheap flights from London Heathrow Airport to Sylhet from £423

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 27/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ZYL
17 May — 24 May1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Sylhet Osmani Intl are usually found in September or October, booked 86 days in advance, depart on a Thursday or Wednesday and return on a Monday

Cheap 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 17 April 2026.

Sun 23/818:20
LHR
-
ZYL
Nonstop9h 45m
Biman Bangladesh
Wed 16/909:35
ZYL
-
LHR
Nonstop11h 20m
Biman Bangladesh
Deal found 14/4£731
Wed 9/908:25
LHR
-
ZYL
2 stops25h 20m
Multiple Airlines
Wed 30/920:25
ZYL
-
LHR
2 stops22h 40m
Multiple Airlines
Deal found 15/4£733
Wed 2/918:20
LHR
-
ZYL
Nonstop9h 45m
Biman Bangladesh
Wed 30/912:15
ZYL
-
LHR
1 stop33h 50m
Biman Bangladesh
Deal found 12/4£734
Thu 17/916:45
LHR
-
ZYL
2 stops41h 00m
Multiple Airlines
Wed 7/1020:25
ZYL
-
LHR
2 stops23h 20m
Multiple Airlines
Deal found 13/4£734
Sun 3/510:00
LHR
-
ZYL
2 stops26h 50m
Multiple Airlines
Sun 10/508:20
ZYL
-
LHR
2 stops28h 10m
Multiple Airlines
Deal found 13/4£735
Thu 29/1015:45
LHR
-
ZYL
2 stops21h 45m
Multiple Airlines
Thu 26/1109:15
ZYL
-
LHR
2 stops34h 30m
Multiple Airlines
Deal found 17/4£736
Sun 14/610:00
LHR
-
ZYL
2 stops29h 00m
Multiple Airlines
Mon 29/615:10
ZYL
-
LHR
2 stops28h 05m
Multiple Airlines
Deal found 16/4£737
Wed 2/1215:45
LHR
-
ZYL
2 stops45h 45m
Multiple Airlines
Sat 19/1208:50
ZYL
-
LHR
2 stops34h 55m
Multiple Airlines
Deal found 15/4£739
Wed 29/414:40
LHR
-
ZYL
2 stops25h 50m
Multiple Airlines
Wed 13/508:20
ZYL
-
LHR
2 stops28h 10m
Multiple Airlines
Deal found 12/4£739
Fri 30/1018:15
LHR
-
ZYL
Nonstop9h 40m
Biman Bangladesh
Sun 29/1110:25
ZYL
-
LHR
Nonstop11h 40m
Biman Bangladesh
Deal found 17/4£744
Sun 13/922:00
LHR
-
ZYL
2 stops35h 45m
Multiple Airlines
Fri 13/1109:55
ZYL
-
LHR
2 stops33h 50m
Multiple Airlines
Deal found 14/4£748

Find 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 17 April 2026.

Round-trip from

£731

One-way from

£423

Popular in

December

Cheapest in

September

Average price

£837

Good round-trip deal

£780 or less

Good one-way deal

£432 or less
Biman Bangladesh
  • Biman Bangladesh
  • 23/8-16/9
  • Nonstop
  • 21h 05m total
  • London to Sylhet
Search Deals
27/4
  • 27/4
  • 2 total stops
  • 38h 20m total
  • London to Sylhet
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£110 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 April 2026
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 17 April 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Sylhet that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Mon 21/9

16:45-14:45

2 stops41h 00m

Sylhet Osmani Intl

Mon 28/9

15:10-14:45

2 stops28h 35m

£768
Fastest return journey

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Tue 30/6

15:35-14:45

2 stops18h 10m

Sylhet Osmani Intl

Sun 26/7

22:10-14:05

2 stops20h 55m

£790

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Sat 2/5

21:55-11:50

2 stops32h 55m

Sylhet Osmani Intl

Tue 26/5

11:45-13:15

2 stops30h 30m

£790

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Thu 30/4

21:55-14:45

2 stops35h 50m

Sylhet Osmani Intl

Wed 27/5

12:15-14:05

2 stops30h 50m

£793

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 1/7

09:00-14:45

2 stops24h 45m

Sylhet Osmani Intl

Sat 1/8

15:10-14:05

2 stops27h 55m

£800

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 27/5

21:45-11:50

2 stops33h 05m

Sylhet Osmani Intl

Wed 3/6

20:25-18:00

2 stops26h 35m

£805

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 10/6

21:55-18:00

2 stops39h 05m

Sylhet Osmani Intl

Sun 5/7

15:10-14:05

2 stops27h 55m

£807

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Sat 5/9

18:05-18:10

2 stops43h 05m

Sylhet Osmani Intl

Sat 19/9

20:25-14:45

2 stops23h 20m

£829

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Sat 2/5

15:25-20:00

2 stops23h 35m

Sylhet Osmani Intl

Sat 23/5

12:15-13:55

2 stops30h 40m

£832

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 20/5

19:25-11:50

2 stops35h 25m

Sylhet Osmani Intl

Thu 28/5

10:05-08:00

2 stops26h 55m

£849

Flights are sorted by cheapest return flights first.

Deals found on 15/4

Showing 1-10 of 21 resultsSorted by cheapest first
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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 10 April 2026.

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Sylhet, you should look to book at least 86 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 £702). Flying from London Heathrow Airport to Sylhet in December is currently the most expensive (average of £1,385). 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 17 April 2026.

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.

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 17 April 2026.
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
7.2
Good
28 reviews
Check prices

Comfort

6.8

Overall

7.2

Food

7.2

Boarding

7.4

Entertainment

6.6

Crew

7.8
Biman Bangladesh
7.2
Good
28 reviews
Biman Bangladesh
7.2
Good
28 reviews
Check prices

Comfort

6.8

Overall

7.2

Food

7.2

Boarding

7.4

Entertainment

6.6

Crew

7.8

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 £665, 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 28% 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 £1,028, our data indicates the cheapest price to be £402. The most popular route (London Heathrow - Sylhet Osmani Intl), is priced around £706.

  • 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 £702). Flying from London Heathrow Airport to Sylhet in December is currently the most expensive (average of £1,385). 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 17 April 2026.
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 17 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Biman BangladeshCheapest£665Average£908FlexibilityNo 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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