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Cheap flights from London to Sylhet from £417

LON — ZYL
9 Dec — 16 Dec1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Sylhet Osmani Intl are usually found in September or April, booked 51 days in advance, depart on a Thursday or Monday and return on a Tuesday

Cheap flight deals from London to Sylhet

Enter your travel dates to find the best prices.

Cheapest flights from London to Sylhet

Tue 1/1221:05 -
2 stops42h 30m
Mon 14/1211:05 -
2 stops30h 25m
Deal found 5/11£737
Sun 15/1109:30 -
2 stops30h 05m
Sun 29/1117:50 -
2 stops30h 00m
Deal found 5/11£738
Wed 18/1116:50 -
2 stops38h 40m
Fri 5/213:55 -
2 stops22h 40m
Deal found 5/11£739
Thu 26/1113:30 -
2 stops20h 25m
Thu 10/1212:10 -
2 stops38h 20m
Deal found 6/11£740
Wed 18/1108:40 -
2 stops25h 15m
Mon 1/212:10 -
2 stops23h 45m
Deal found 5/11£740
Sun 15/1119:20 -
2 stops38h 35m
Mon 7/1211:05 -
2 stops37h 05m
Deal found 4/11£740
Mon 30/1108:45 -
2 stops30h 50m
Mon 14/1212:10 -
2 stops29h 20m
Deal found 6/11£741
Fri 27/1113:30 -
2 stops20h 25m
Wed 16/1212:10 -
2 stops38h 20m
Deal found 5/11£742
Tue 17/1108:40 -
2 stops45h 05m
Mon 7/1216:20 -
2 stops20h 20m
Deal found 5/11£743
Tue 10/1119:20 -
2 stops34h 25m
Tue 24/1122:00 -
2 stops44h 05m
Deal found 5/11£743
Sun 15/1119:20 -
2 stops38h 35m
Thu 3/1222:00 -
2 stops38h 40m
Deal found 8/11£746
Sat 21/1108:45 -
2 stops25h 10m
Sat 28/1116:20 -
2 stops29h 15m
Deal found 5/11£746

Find flight deals from London to Sylhet

Round-trip from

£736

One-way from

£417

Popular in

December

Cheapest in

September

Average price

£991

Good round-trip deal

£893 or less

Good one-way deal

£698 or less
16/4-30/5
  • 16/4-30/5
  • 4 total stops
  • 83h 05m total
  • London to Sylhet
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14/11-31/12
  • 14/11-31/12
  • 2 total stops
  • 30h 05m total
  • London to Sylhet
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£132 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£31 potential savings vs. average return price).
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Average for round-trip flights in November 2026
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Price to beat on a round-trip flight from London (LON) to Sylhet Osmani Intl.
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Price to beat on a one-way flight from London (LON) to Sylhet Osmani Intl.
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from London to Sylhet that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSylhet

LGW London Gatwick - ZYL Sylhet Osmani Intl

LGWZYL

London Gatwick

Tue 5/1

12:45-15:55

2 stops21h 10m

Sylhet Osmani Intl

Wed 31/12

00:00-19:00

Nonstop0h 00m

£424

LondonSylhet

LGW London Gatwick - ZYL Sylhet Osmani Intl

LGWZYL

London Gatwick

Sat 12/12

19:45-10:05

3 stops32h 20m

Sylhet Osmani Intl

Wed 31/12

00:00-19:00

Nonstop0h 00m

£424

LondonSylhet

STN London Stansted - ZYL Sylhet Osmani Intl

STNZYL

London Stansted

Wed 3/3

07:45-14:10

3 stops24h 25m

Sylhet Osmani Intl

Wed 31/12

00:00-19:00

Nonstop0h 00m

£427

LondonSylhet

STN London Stansted - ZYL Sylhet Osmani Intl

STNZYL

London Stansted

Sun 15/11

12:30-07:30

2 stops37h 00m

Sylhet Osmani Intl

Wed 31/12

00:00-19:00

Nonstop0h 00m

£435

LondonSylhet

LTN London Luton - ZYL Sylhet Osmani Intl

LTNZYL

London Luton

Tue 17/11

09:10-15:55

2 stops24h 45m

Sylhet Osmani Intl

Wed 31/12

00:00-19:00

Nonstop0h 00m

£436

LondonSylhet

LGW London Gatwick - ZYL Sylhet Osmani Intl

LGWZYL

London Gatwick

Wed 2/12

06:10-07:30

3 stops19h 20m

Sylhet Osmani Intl

Wed 31/12

00:00-19:00

Nonstop0h 00m

£438
Fastest return journey

LondonSylhet

LGW London Gatwick - ZYL Sylhet Osmani Intl

LGWZYL

London Gatwick

Mon 1/3

06:30-07:30

3 stops19h 00m

Sylhet Osmani Intl

Wed 31/12

00:00-19:00

Nonstop0h 00m

£446

LondonSylhet

LHR London Heathrow - ZYL Sylhet Osmani Intl

LHRZYL

London Heathrow

Wed 25/11

08:05-15:55

2 stops25h 50m

Sylhet Osmani Intl

Wed 31/12

00:00-19:00

Nonstop0h 00m

£448

LondonSylhet

LHR London Heathrow - ZYL Sylhet Osmani Intl

LHRZYL

London Heathrow

Thu 3/12

09:25-21:40

2 stops30h 15m

Sylhet Osmani Intl

Wed 31/12

00:00-19:00

Nonstop0h 00m

£448

LondonSylhet

LGW London Gatwick - ZYL Sylhet Osmani Intl

LGWZYL

London Gatwick

Wed 3/3

06:45-12:00

3 stops23h 15m

Sylhet Osmani Intl

Wed 31/12

00:00-19:00

Nonstop0h 00m

£449

Flights are sorted by cheapest return flights first.

Deals found on 6/11

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from London to Sylhet

Have a flexible travel schedule? Discover the best time to fly to Sylhet from London with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from London to Sylhet

What is the cheapest month to book a flight from London to Sylhet?

Currently, September is the cheapest month in which you can book a flight from London to Sylhet (average of £782). Flying from London to Sylhet in December is currently the most expensive (average of £1,381). 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 LON to ZYL?

When flying from London to Sylhet, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost for a return flight from London to Sylhet?

Airfare is below average for this route at the moment.
London to Sylhet flights typically cost between £910 and £1,074 in April.
The cheapest return price found within the last 5 days was £736 on Multiple Airlines (16 Apr–30 May).

What’s the top stopover airport for flights from London to Sylhet?

Dhaka (DAC) – chosen by Cheapflights users on 64% of one-stop itineraries from London to Sylhet on Cheapflights.

What’s the cheapest stopover airport for flights from London to Sylhet?

Muscat (MCT) is the most affordable one-stop option, with an average return flight price of £786.

What’s the fastest stopover option from London to Sylhet?

Flights via Dhaka (DAC) have the shortest average one-way travel time for one-stop routes: 14h 46m.

Which airport typically offers the quickest stopover for flights from London to Sylhet?

Flights via Muscat (MCT) offer the fastest connection on this route, with an average stopover time of 5h 54m.

How often are flights from London to Sylhet delayed?

About 27% of weekly flights between London and Sylhet have experienced delays in the past year, with the average delay time being 197 minutes.

What is the most punctual flight time for London to Sylhet flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Sylhet flights?

Over the past year, Biman Bangladesh have had the lowest number of delays on this route, with just 27% of flights being delayed.

How far ahead should I book a flight from London to Sylhet?

To ensure you get the cheapest price possible for a flight from London to Sylhet, you should look to book at least 36 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.

Reviews of airlines servicing Sylhet

Check out reviews from past customers who have flown with Qatar Airways and Biman Bangladesh from London to Sylhet to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Qatar Airways
7.4
Good
3,707 reviews
Check prices

Overall

7.4

Entertainment

7.3

Crew

7.9

Boarding

7.5

Comfort

7.3

Food

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2026

DOH - DFW

Great! Should have let used business lounge with business class tickets
Qatar Airways
7.4
Good
3,707 reviews
Qatar Airways
7.4
Good
3,707 reviews
Check prices

Overall

7.4

Entertainment

7.3

Crew

7.9

Boarding

7.5

Comfort

7.3

Food

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2026

DOH - DFW

Great! Should have let used business lounge with business class tickets
Biman Bangladesh
6.6
Okay
32 reviews
Qatar Airways
7.4
Good
3,707 reviews
Check prices

Overall

7.4

Entertainment

7.3

Crew

7.9

Boarding

7.5

Comfort

7.3

Food

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2026

DOH - DFW

Great! Should have let used business lounge with business class tickets

Related info for your journey

  • What airport do you fly into for flights to Sylhet from London?

    If you book a flight to Sylhet from London, you will be flying to Osmani Intl, which is the city’s only airport. Sylhet Osmani Intl (ZYL) is located 4.3 mi from the center of Sylhet. There are 0 flights from London to Osmani Intl per day from 2 different airlines.

  • How long is the flight from London to Sylhet?

    A quick flight from London to Sylhet can take about 17h 05m. Oman Air provides one of the quickest options available for as low as £883. London and Sylhet are separated by a distance of 4979 mi.

  • What are the cheapest airlines flying from London to Sylhet round-trip?

    Our cheapest airline available from London to Sylhet is Biman Bangladesh. Our recent data shows that you can find tickets from as low as £698 on this airline. An additional option worth looking into is Lufthansa, starting at £790. Biman Bangladesh is 27% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the most popular routes from London to Sylhet?

    When deciding which route to take from London to Sylhet consider London Heathrow - Sylhet Osmani Intl, London Gatwick - Sylhet Osmani Intl or London Stansted - Sylhet Osmani Intl as they are the most popular.

  • What are the cheapest flights from London to Sylhet?

    On average you can expect to pay £1,164 for a flight from London to Sylhet. The cheapest flight overall is £543 while the most popular route, (London Heathrow - Sylhet Osmani Intl) is currently priced at £659.

  • Can I find deals for flights from London to Sylhet that include hotel bookings?

    Yes. In addition to deals on London to Sylhet flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Sylhet?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Sylhet.

  • Can I find deals for business class flights from London to Sylhet?

    Yes. Cheapflights offers flight deals from London 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 to Sylhet?

    Currently, September is the cheapest month in which you can book a flight from London to Sylhet (average of £782). Flying from London to Sylhet in December is currently the most expensive (average of £1,381). 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

Fly from London to Sylhet on these airlines

Biman Bangladesh flights from London to Sylhet Osmani Intl

Top 2 airlines flying from London to Sylhet

AirlineCheapestAverageFlexibilityOn-time
Biman BangladeshCheapest£699Average£932FlexibilityNo cancel feeOn-time45%
Search Biman Bangladesh flights
LufthansaCheapest£790Average£1,162FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

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When you search for this flight from London to Sylhet, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from London 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 London.

Can Cheapflights find flights from London to Sylhet with no change fees?

Certainly. Search results for flights to Sylhet from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from London to Sylhet become cheaper?

Yes, Cheapflights offers price alerts on London to Sylhet flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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