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Cheap flights from London Heathrow Airport to Sylhet from £364

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 20/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ZYL
15 Feb — 22 Feb1
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 May, booked 56 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 16 January 2026.

Round-trip from

£705

One-way from

£364

Popular in

December

Cheapest in

September

Average price

£959

Good round-trip deal

£795 or less

Good one-way deal

£613 or less
25/5-15/6
  • 25/5-15/6
  • 4 total stops
  • 57h 05m total
  • London to Sylhet
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20/1
  • 20/1
  • 2 total stops
  • 28h 30m total
  • London to Sylhet
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£122 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£32 potential savings vs. average return price).
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Average for round-trip flights in January 2026
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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 16 January 2026.

Mon 25/508:05
LHR
-
ZYL
2 stops26h 55m
Multiple Airlines
Mon 15/612:15
ZYL
-
LHR
2 stops30h 10m
Multiple Airlines
Deal found 15/1£705
Tue 14/413:40
LHR
-
ZYL
2 stops21h 20m
Multiple Airlines
Tue 28/407:45
ZYL
-
LHR
2 stops17h 40m
Multiple Airlines
Deal found 15/1£705
Wed 28/110:00
LHR
-
ZYL
2 stops29h 10m
Multiple Airlines
Sat 14/208:35
ZYL
-
LHR
2 stops28h 55m
Multiple Airlines
Deal found 14/1£707
Mon 26/110:00
LHR
-
ZYL
2 stops27h 35m
Multiple Airlines
Mon 16/214:50
ZYL
-
LHR
2 stops27h 25m
Multiple Airlines
Deal found 14/1£708
Wed 28/110:00
LHR
-
ZYL
2 stops27h 35m
Multiple Airlines
Fri 13/208:35
ZYL
-
LHR
2 stops28h 55m
Multiple Airlines
Deal found 14/1£710
Thu 5/218:55
LHR
-
ZYL
2 stops20h 50m
Multiple Airlines
Thu 30/416:25
ZYL
-
LHR
2 stops26h 45m
Multiple Airlines
Deal found 14/1£712
Mon 2/218:45
LHR
-
ZYL
2 stops21h 00m
Multiple Airlines
Mon 2/315:55
ZYL
-
LHR
2 stops28h 05m
Multiple Airlines
Deal found 15/1£714
Wed 4/206:35
LHR
-
ZYL
3 stops31h 25m
Multiple Airlines
Thu 5/315:55
ZYL
-
LHR
3 stops30h 15m
Multiple Airlines
Deal found 14/1£715
Sun 1/318:15
LHR
-
ZYL
Nonstop9h 40m
Biman Bangladesh
Wed 18/310:25
ZYL
-
LHR
Nonstop11h 40m
Biman Bangladesh
Deal found 15/1£716
Tue 20/110:00
LHR
-
ZYL
2 stops28h 30m
Multiple Airlines
Tue 3/210:45
ZYL
-
LHR
2 stops31h 30m
Multiple Airlines
Deal found 15/1£717
Sat 31/106:35
LHR
-
ZYL
2 stops23h 15m
Multiple Airlines
Thu 12/222:10
ZYL
-
LHR
2 stops30h 15m
Multiple Airlines
Deal found 15/1£718
Sat 31/106:35
LHR
-
ZYL
2 stops23h 15m
Multiple Airlines
Wed 18/215:55
ZYL
-
LHR
2 stops30h 15m
Multiple Airlines
Deal found 14/1£719

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 16 January 2026.
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 4/3

18:15-09:55

Nonstop9h 40m

Sylhet Osmani Intl

Wed 18/3

22:10-16:05

1 stop23h 55m

£716

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 20/5

08:25-16:00

2 stops26h 35m

Sylhet Osmani Intl

Wed 17/6

20:10-14:05

2 stops22h 55m

£738

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Fri 30/1

11:30-19:35

3 stops26h 05m

Sylhet Osmani Intl

Fri 13/2

12:15-14:30

3 stops32h 15m

£749

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 18/3

08:40-15:30

2 stops24h 50m

Sylhet Osmani Intl

Fri 1/5

07:30-22:00

2 stops19h 30m

£749

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 22/4

08:25-11:50

2 stops22h 25m

Sylhet Osmani Intl

Fri 22/5

08:05-22:00

2 stops18h 55m

£754

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Sun 17/5

08:05-16:00

2 stops26h 55m

Sylhet Osmani Intl

Wed 17/6

20:10-14:05

2 stops22h 55m

£762

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Wed 20/5

08:25-11:50

2 stops22h 25m

Sylhet Osmani Intl

Sat 20/6

20:10-13:25

2 stops22h 15m

£762

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Thu 14/5

08:25-11:50

2 stops22h 25m

Sylhet Osmani Intl

Sun 21/6

16:25-14:05

2 stops26h 40m

£763

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Tue 17/3

13:50-20:15

2 stops24h 25m

Sylhet Osmani Intl

Tue 14/4

20:10-18:00

2 stops26h 50m

£764

LondonSylhet

LHR - ZYL

LHRZYL

London Heathrow

Sat 14/3

08:40-16:25

2 stops25h 45m

Sylhet Osmani Intl

Sun 19/4

21:25-18:00

2 stops25h 35m

£778

Flights are sorted by cheapest return flights first.

Deals found on 15/1

Showing 1-10 of 17 results
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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 9 January 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 56 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 £629). Flying from London Heathrow Airport to Sylhet in December is currently the most expensive (average of £889). 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 16 January 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.

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 16 January 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
6.7
Okay
24 reviews
Check prices

Boarding

7.0

Crew

7.5

Food

6.8

Entertainment

6.0

Comfort

6.3

Overall

6.7
Biman Bangladesh
6.7
Okay
24 reviews
Biman Bangladesh
6.7
Okay
24 reviews
Check prices

Boarding

7.0

Crew

7.5

Food

6.8

Entertainment

6.0

Comfort

6.3

Overall

6.7

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 40m. 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 £666, 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 £1,191, our data indicates the cheapest price to be £416. The most popular route (London Heathrow - Sylhet Osmani Intl), is priced around £661.

  • 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 £629). Flying from London Heathrow Airport to Sylhet in December is currently the most expensive (average of £889). 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 16 January 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 16 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Biman BangladeshCheapest£666Average£894FlexibilityNo 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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