Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London to Siena from £56

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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BLQ
20 Dec — 27 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London to Siena are usually found in January or March, booked 72 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Find flight deals from London to Siena

Enter your travel dates to find the best prices.

Cheapest flights from London to Siena
Explore the most affordable flight options available from London to Siena. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 November 2025.

Fri 12/1219:55LGW - FLR
Nonstop2h 10mVueling
Sat 13/1218:00FLR - LGW
Nonstop2h 15mVueling
Deal found 19/11£92
Sat 6/1219:55LGW - FLR
Nonstop2h 10mVueling
Tue 16/1206:45FLR - LGW
1 stop10h 00mVueling
Deal found 18/11£93
Mon 15/1207:10LGW - FLR
2 stops25h 05mMultiple Airlines
Wed 17/1208:20FLR - LGW
Nonstop2h 20mMultiple Airlines
Deal found 19/11£94
Thu 11/1208:05LGW - FLR
1 stop4h 45mMultiple Airlines
Thu 11/1218:00FLR - LGW
Nonstop2h 15mMultiple Airlines
Deal found 19/11£98
Wed 10/1219:25LGW - FLR
1 stop14h 30mVueling
Thu 11/1213:20FLR - LGW
Nonstop2h 20mVueling
Deal found 18/11£100
Wed 10/1207:00LGW - FLR
2 stops25h 15mMultiple Airlines
Thu 11/1213:20FLR - LGW
Nonstop2h 20mMultiple Airlines
Deal found 19/11£101
Sat 6/1219:55LGW - FLR
Nonstop2h 10mVueling
Sun 14/1218:00FLR - LGW
Nonstop2h 15mVueling
Deal found 19/11£101
Sat 6/1219:55LGW - FLR
Nonstop2h 10mMultiple Airlines
Mon 8/1215:05FLR - LGW
1 stop24h 55mMultiple Airlines
Deal found 19/11£103
Sat 6/1222:30LGW - FLR
2 stops14h 45mMultiple Airlines
Tue 16/1206:55FLR - LGW
Nonstop2h 20mMultiple Airlines
Deal found 18/11£105
Thu 4/1219:55LGW - FLR
Nonstop2h 10mVueling
Fri 12/1212:55FLR - LGW
Nonstop2h 20mVueling
Deal found 19/11£106
Wed 17/1208:30LGW - FLR
1 stop23h 45mVueling
Wed 14/108:20FLR - LGW
Nonstop2h 20mVueling
Deal found 19/11£111
Sat 6/1218:20STN - FLR
1 stop15h 15mMultiple Airlines
Sun 14/1211:15FLR - STN
1 stop6h 55mMultiple Airlines
Deal found 19/11£120

Cheap flight deals from London to Siena

Keep the following information in mind while searching for London to Siena flight deals. Data was last updated 20 November 2025.

Round-trip from

£88

One-way from

£56

Popular in

July

Cheapest in

January

Average price

£151
Vueling
  • Vueling
  • 10/1-11/1
  • Nonstop
  • 4h 25m total
  • London to Siena
Search Deals
Vueling
  • Vueling
  • 9/5
  • Nonstop
  • 2h 15m total
  • London to Siena
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£30 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Siena 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 20 November 2025.
Use the filters below to find and compare flights from London to Siena that are best for you.

Fly from

London

Fly to

Siena

Route

Depart

Return

Price

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Sat 10/1

19:55-23:05

Nonstop2h 10m

Florence Peretola

Wed 14/1

20:55-15:10

2 stops19h 15m

£91

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Thu 11/12

08:05-13:50

1 stop4h 45m

Florence Peretola

Thu 11/12

18:00-19:15

Nonstop2h 15m

£98

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Thu 9/4

19:55-23:10

Nonstop2h 15m

Florence Peretola

Mon 13/4

22:00-10:15

1 stop13h 15m

£99

LondonFlorence

STN - FLR

STNFLR

London Stansted

Wed 28/1

20:55-09:15

1 stop11h 20m

Florence Peretola

Sat 31/1

09:50-20:35

1 stop11h 45m

£108

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Mon 23/3

14:05-22:55

1 stop7h 50m

Florence Peretola

Sat 28/3

18:00-19:15

Nonstop2h 15m

£109

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Tue 21/4

05:30-21:25

1 stop14h 55m

Florence Peretola

Mon 27/4

22:00-10:50

1 stop13h 50m

£109

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Fri 10/4

19:55-23:10

Nonstop2h 15m

Florence Peretola

Mon 13/4

22:00-10:15

1 stop13h 15m

£111

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Fri 20/2

06:50-22:30

2 stops14h 40m

Florence Peretola

Tue 10/3

14:40-22:20

1 stop8h 40m

£119

LondonFlorence

STN - FLR

STNFLR

London Stansted

Mon 26/1

13:55-22:55

1 stop8h 00m

Florence Peretola

Thu 29/1

21:00-07:40

1 stop11h 40m

£122

LondonFlorence

SEN - FLR

SENFLR

London Southend

Sun 25/1

07:10-20:20

1 stop12h 10m

Florence Peretola

Wed 28/1

20:55-12:00

1 stop16h 05m

£123

Flights are sorted by cheapest return flights first.

Deals found on 19/11

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from London to Siena

Have a flexible travel schedule? Discover the best time to fly to Siena from London 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 to Siena

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

Use this chart to determine the optimal time to book a return flight from London to Siena. Price data was last updated on 14 November 2025.

To ensure you get the cheapest price possible for a flight from London to Siena, you should look to book at least 72 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 to Siena?

Currently, January is the cheapest month in which you can book a flight from London to Siena (average of £14). Flying from London to Siena in August is currently the most expensive (average of £95). 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 S1N?

Find hourly flight availability from London to Siena. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 20 November 2025.

It’s optimal to fly from London to Siena in the evening. By choosing this option you can save up to 23% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from London to Siena?

Use this chart to determine the cheapest time to fly return from London to Siena. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London to Siena flight should consider departing on Thursday evenings when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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

Reviews of airlines servicing Siena

Get insights into the airlines that provide service to Siena. 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 Siena. Reviews last updated 20 November 2025.
Check out reviews from past customers who have flown with Vueling, easyJet, andLufthansa from London to Siena 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.
Vueling
7.1
Good
1,208 reviews
Check prices

Crew

7.7

Entertainment

5.8

Overall

7.1

Comfort

6.8

Boarding

7.1

Food

6.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

BCN - DUB

My tv was not working and I had to switch seats 3 times. Other than that excellent experience.
Vueling
7.1
Good
1,208 reviews
Vueling
7.1
Good
1,208 reviews
Check prices

Crew

7.7

Entertainment

5.8

Overall

7.1

Comfort

6.8

Boarding

7.1

Food

6.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

BCN - DUB

My tv was not working and I had to switch seats 3 times. Other than that excellent experience.
easyJet
6.9
Okay
1,846 reviews
Vueling
7.1
Good
1,208 reviews
Check prices

Crew

7.7

Entertainment

5.8

Overall

7.1

Comfort

6.8

Boarding

7.1

Food

6.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

BCN - DUB

My tv was not working and I had to switch seats 3 times. Other than that excellent experience.
Lufthansa
6.8
Okay
7,579 reviews
Vueling
7.1
Good
1,208 reviews
Check prices

Crew

7.7

Entertainment

5.8

Overall

7.1

Comfort

6.8

Boarding

7.1

Food

6.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

BCN - DUB

My tv was not working and I had to switch seats 3 times. Other than that excellent experience.
Ryanair
6.8
Okay
5,196 reviews
Vueling
7.1
Good
1,208 reviews
Check prices

Crew

7.7

Entertainment

5.8

Overall

7.1

Comfort

6.8

Boarding

7.1

Food

6.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

BCN - DUB

My tv was not working and I had to switch seats 3 times. Other than that excellent experience.
British Airways
6.7
Okay
7,534 reviews
Vueling
7.1
Good
1,208 reviews
Check prices

Crew

7.7

Entertainment

5.8

Overall

7.1

Comfort

6.8

Boarding

7.1

Food

6.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

BCN - DUB

My tv was not working and I had to switch seats 3 times. Other than that excellent experience.

Related info for your journey

Find useful and relevant information for your journey from London to Siena. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from London to Siena?

    A quick flight from London to Siena can take about 2h 05m. Vueling provides one of the quickest options available for as low as £136. The distance between London and Siena is about 741 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines to fly from London to Siena one-way?

    The cheapet airlines for a one-way flight from London to Siena are Vueling (£56), British Airways (£61), and SWISS (£95).

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

    The most popular route from London to Siena is London Heathrow - Florence Peretola. You may also consider London Gatwick - Florence Peretola or London City - Florence Peretola.

  • What are the most reliable airlines from London to Siena?

    Consider Japan Airlines (81%), American Airlines (80%) or British Airways (80%) when booking your flight. These represent the most reliable airlines when flying from London to Siena.

  • What are the cheapest flights from London to Siena?

    While on average a flight from London to Siena is generally £152, our data shows the cheapest flight currently is £71. When looking at the most popular route, (London Heathrow - Florence Peretola), you can expect to pay £127 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London to Siena 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 Siena?

    Currently, January is the cheapest month in which you can book a flight from London to Siena (average of £14). Flying from London to Siena in August is currently the most expensive (average of £95). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to Siena

See prices for flight routes from nearby airports that may be better suited for you.
Gatwick to Leonardo da Vinci/Fiumicino flights
London City to Leonardo da Vinci/Fiumicino flights
Heathrow to Leonardo da Vinci/Fiumicino flights
Stansted to Leonardo da Vinci/Fiumicino flights
Luton to Leonardo da Vinci/Fiumicino flights
Stansted to Ciampino flights
Heathrow to Florence flights
London City to Florence flights
Manchester to Leonardo da Vinci/Fiumicino flights
Gatwick to Florence flights
Gatwick to Pisa flights
Luton to Ciampino flights
Stansted to Pisa flights
Manchester to Ciampino flights
Southend to Leonardo da Vinci/Fiumicino flights
Luton to Florence flights
Edinburgh to Leonardo da Vinci/Fiumicino flights
Gatwick to Ciampino flights
Stansted to Florence flights
London City to Pisa flights
Bristol to Leonardo da Vinci/Fiumicino flights
Birmingham to Leonardo da Vinci/Fiumicino flights
Heathrow to Pisa flights
Luton to Pisa flights
Edinburgh to Ciampino flights
Manchester to Florence flights
Manchester to Pisa flights
Southampton to Leonardo da Vinci/Fiumicino flights
Birmingham to Ciampino flights
Bristol to Ciampino flights
Newcastle upon Tyne to Leonardo da Vinci/Fiumicino flights
Edinburgh to Florence flights
Birmingham to Pisa flights
Birmingham to Florence flights
Leeds to Leonardo da Vinci/Fiumicino flights
Liverpool to Leonardo da Vinci/Fiumicino flights
Heathrow to Ciampino flights
Liverpool to Ciampino flights
Bristol to Pisa flights
Southend to Florence flights
Newcastle upon Tyne to Ciampino flights
Edinburgh to Pisa flights
Leeds to Ciampino flights
East Midlands to Leonardo da Vinci/Fiumicino flights
Southend to Pisa flights
East Midlands to Ciampino flights
Exeter to Leonardo da Vinci/Fiumicino flights
Southampton to Ciampino flights
Exeter to Ciampino flights
Newcastle upon Tyne to Florence flights

Top 8 airlines flying from London to Siena

Discover the top 8 airlines that operate flights from London to Siena. 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 20 November 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£24Average£133FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
easyJetCheapest£40Average£131FlexibilityNo cancel feeOn-time86%
Search easyJet flights
VuelingCheapest£72Average£154FlexibilityNo cancel feeOn-time88%
Search Vueling flights
KLMCheapest£86Average£225FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£92Average£243FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£132Average£193FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
SWISSCheapest£144Average£199FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Air FranceCheapest£164Average£257FlexibilityNo cancel feeOn-time77%
Search Air France 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 London to Siena?

When you search for this flight from London to Siena, 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 Siena?

Cheapflights simply makes it quick and affordable to book flights from London to Siena by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Certainly. Search results for flights to Siena 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 Siena become cheaper?

Yes, Cheapflights offers price alerts on London to Siena 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.