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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 22/1. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BLQ
4 Jan — 11 Jan1
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 Monday and return on a Tuesday

Cheap 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 5 December 2025.

Sat 13/1219:55LGW - FLR
Nonstop2h 10mVueling
Wed 17/1218:00FLR - LGW
Nonstop2h 15mVueling
Deal found 3/12£94
Wed 31/1219:55LGW - FLR
Nonstop2h 10mVueling
Thu 8/118:00FLR - LGW
Nonstop2h 15mVueling
Deal found 4/12£96
Sat 6/1219:55LGW - FLR
Nonstop2h 10mVueling
Sat 13/1218:00FLR - LGW
Nonstop2h 15mVueling
Deal found 3/12£98
Sat 13/1219:55LGW - FLR
Nonstop2h 10mVueling
Thu 18/1218:00FLR - LGW
Nonstop2h 15mVueling
Deal found 2/12£100
Wed 31/1219:55LGW - FLR
Nonstop2h 10mVueling
Wed 7/118:00FLR - LGW
Nonstop2h 15mVueling
Deal found 4/12£101
Mon 15/1209:50LGW - FLR
Nonstop2h 15mVueling
Tue 16/1206:55FLR - LGW
Nonstop2h 20mVueling
Deal found 3/12£103
Sat 6/1214:55LGW - FLR
Nonstop2h 10mVueling
Wed 10/1218:00FLR - LGW
Nonstop2h 15mVueling
Deal found 4/12£124
Fri 12/1219:55LGW - FLR
Nonstop2h 10mVueling
Sat 13/1218:00FLR - LGW
Nonstop2h 15mVueling
Deal found 3/12£127
Sat 13/1218:55LGW - FLR
2 stops18h 20mMultiple Airlines
Tue 16/1206:55FLR - LGW
Nonstop2h 20mMultiple Airlines
Deal found 3/12£128
Wed 31/1211:55STN - FLR
1 stop27h 15mMultiple Airlines
Tue 6/116:15FLR - STN
1 stop5h 50mMultiple Airlines
Deal found 4/12£129
Tue 30/1214:55LGW - FLR
Nonstop2h 10mVueling
Thu 8/118:00FLR - LGW
Nonstop2h 15mVueling
Deal found 4/12£135
Wed 31/1206:00LHR - FLR
1 stop25h 50mSWISS
Wed 7/115:10FLR - LHR
1 stop5h 05mSWISS
Deal found 3/12£139

Find flight deals from London to Siena

Keep the following information in mind while searching for London to Siena flight deals. Data was last updated 5 December 2025.

Round-trip from

£87

One-way from

£56

Popular in

July

Cheapest in

January

Average price

£164
Vueling
  • Vueling
  • 24/2-27/2
  • Nonstop
  • 4h 30m total
  • London to Siena
Search Deals
Vueling
  • Vueling
  • 22/1
  • 1 total stop
  • 7h 05m total
  • London to Siena
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£29 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 December 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 5 December 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

Thu 12/2

19:55-23:05

Nonstop2h 10m

Florence Peretola

Sun 15/2

13:15-14:35

Nonstop2h 20m

£90

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Mon 23/2

08:20-18:15

1 stop8h 55m

Florence Peretola

Sat 28/2

18:00-19:15

Nonstop2h 15m

£91

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Wed 6/5

08:30-11:55

Nonstop2h 25m

Florence Peretola

Sat 16/5

17:45-19:10

Nonstop2h 25m

£106

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Wed 4/3

13:10-20:20

1 stop6h 10m

Florence Peretola

Fri 13/3

18:00-19:15

Nonstop2h 15m

£108

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Wed 6/5

05:30-21:20

1 stop14h 50m

Florence Peretola

Wed 13/5

21:55-10:50

1 stop13h 55m

£115

LondonFlorence

STN - FLR

STNFLR

London Stansted

Mon 9/2

07:30-09:15

2 stops24h 45m

Florence Peretola

Thu 12/2

14:35-23:35

1 stop10h 00m

£115

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Wed 6/5

05:30-21:20

1 stop14h 50m

Florence Peretola

Thu 14/5

22:05-10:50

1 stop13h 45m

£118

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Sun 4/1

15:25-18:35

Nonstop2h 10m

Florence Peretola

Sun 11/1

18:00-19:15

Nonstop2h 15m

£119

LondonFlorence

STN - FLR

STNFLR

London Stansted

Sun 22/2

08:30-11:45

Nonstop2h 15m

Florence Peretola

Sat 28/2

15:15-16:30

Nonstop2h 15m

£124

LondonFlorence

STN - FLR

STNFLR

London Stansted

Wed 31/12

11:55-16:10

1 stop27h 15m

Florence Peretola

Tue 6/1

16:15-21:05

1 stop5h 50m

£129

Flights are sorted by cheapest return flights first.

Deals found on 4/12

Showing 1-10 of 60 results
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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 28 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 £94). 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 5 December 2025.

It’s optimal to fly from London to Siena in the evening. By choosing this option you can save up to 25% 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 5 December 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
1,215 reviews
Check prices

Food

6.2

Overall

7.1

Crew

7.7

Entertainment

5.9

Boarding

7.1

Comfort

6.8

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
1,215 reviews
Vueling
7.1
Good
1,215 reviews
Check prices

Food

6.2

Overall

7.1

Crew

7.7

Entertainment

5.9

Boarding

7.1

Comfort

6.8

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
1,848 reviews
Vueling
7.1
Good
1,215 reviews
Check prices

Food

6.2

Overall

7.1

Crew

7.7

Entertainment

5.9

Boarding

7.1

Comfort

6.8

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
7,612 reviews
Vueling
7.1
Good
1,215 reviews
Check prices

Food

6.2

Overall

7.1

Crew

7.7

Entertainment

5.9

Boarding

7.1

Comfort

6.8

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
5,212 reviews
Vueling
7.1
Good
1,215 reviews
Check prices

Food

6.2

Overall

7.1

Crew

7.7

Entertainment

5.9

Boarding

7.1

Comfort

6.8

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
7,562 reviews
Vueling
7.1
Good
1,215 reviews
Check prices

Food

6.2

Overall

7.1

Crew

7.7

Entertainment

5.9

Boarding

7.1

Comfort

6.8

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 10m. Vueling provides one of the quickest options available for as low as £90. The distance between London and Siena is about 733 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 (£35), British Airways (£55), and Austrian Airlines (£91).

  • 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 City - Florence Peretola or London Gatwick - Florence Peretola.

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

    Consider Japan Airlines (85%), American Airlines (81%) or British Airways (81%) 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 £141, our data shows the cheapest flight currently is £65. When looking at the most popular route, (London Heathrow - Florence Peretola), you can expect to pay £137 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 £94). 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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Alternative routes for London to Siena

See prices for flight routes from nearby airports that may be better suited for you.
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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 5 December 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£23Average£128FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
easyJetCheapest£40Average£130FlexibilityNo cancel feeOn-time86%
Search easyJet flights
VuelingCheapest£71Average£157FlexibilityNo cancel feeOn-time88%
Search Vueling flights
KLMCheapest£72Average£240FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£92Average£242FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£132Average£191FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
SWISSCheapest£151Average£210FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Air FranceCheapest£162Average£252FlexibilityNo 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.

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