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Cheap flights from London to Siena from £54

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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BLQ
15 Feb — 22 Feb1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Siena are usually found in January or February, booked 72 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

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 16 January 2026.

Round-trip from

£85

One-way from

£54

Popular in

July

Cheapest in

January

Average price

£122
Vueling
  • Vueling
  • 28/2-7/3
  • 1 total stop
  • 13h 30m total
  • London to Siena
Search Deals
Vueling
  • Vueling
  • 8/3
  • Nonstop
  • 2h 10m total
  • London to Siena
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£28 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 16 January 2026.

Sat 28/221:05
LGW
-
FLR
1 stop11h 10m
Vueling
Sat 7/312:55
FLR
-
LGW
Nonstop2h 20m
Vueling
Deal found 14/1£85
Fri 20/319:55
LGW
-
FLR
Nonstop2h 10m
Vueling
Mon 23/307:50
FLR
-
LGW
Nonstop2h 20m
Vueling
Deal found 14/1£86
Tue 10/214:55
LGW
-
FLR
Nonstop2h 10m
Vueling
Wed 11/218:00
FLR
-
LGW
Nonstop2h 15m
Vueling
Deal found 14/1£87
Sat 18/413:00
LGW
-
FLR
1 stop8h 55m
Vueling
Sat 25/406:55
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 13/1£87
Sun 19/421:45
LGW
-
FLR
1 stop9h 40m
Vueling
Thu 23/414:20
FLR
-
LGW
Nonstop2h 30m
Vueling
Deal found 13/1£88
Wed 4/206:05
LGW
-
FLR
2 stops27h 50m
Multiple Airlines
Thu 12/218:00
FLR
-
LGW
Nonstop2h 15m
Multiple Airlines
Deal found 14/1£89
Tue 23/614:30
LGW
-
FLR
Nonstop2h 20m
Vueling
Thu 9/707:35
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 13/1£89
Mon 25/519:50
LGW
-
FLR
Nonstop2h 15m
Vueling
Tue 2/606:25
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 15/1£90
Fri 5/619:55
LGW
-
FLR
Nonstop2h 15m
Vueling
Tue 16/606:25
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 13/1£91
Mon 27/421:05
LGW
-
FLR
2 stops20h 05m
Multiple Airlines
Sat 2/513:10
FLR
-
LGW
Nonstop2h 30m
Multiple Airlines
Deal found 14/1£92
Wed 4/207:55
LGW
-
FLR
1 stop14h 20m
Vueling
Sat 7/218:00
FLR
-
LGW
Nonstop2h 15m
Vueling
Deal found 13/1£92
Sat 13/619:50
LGW
-
FLR
Nonstop2h 15m
Vueling
Sat 20/606:55
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 15/1£93

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 16 January 2026.
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 21/2

19:55-23:05

Nonstop2h 10m

Florence Peretola

Tue 24/2

09:50-23:20

1 stop14h 30m

£87

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Sat 28/2

21:05-09:15

1 stop11h 10m

Florence Peretola

Mon 2/3

07:50-09:10

Nonstop2h 20m

£92

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Tue 19/5

19:40-22:55

Nonstop2h 15m

Florence Peretola

Mon 25/5

06:55-08:20

Nonstop2h 25m

£92

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Sat 2/5

13:00-21:25

1 stop7h 25m

Florence Peretola

Sun 10/5

06:25-07:50

Nonstop2h 25m

£101

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Fri 27/2

14:55-18:05

Nonstop2h 10m

Florence Peretola

Fri 6/3

07:45-22:00

1 stop15h 15m

£101

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Thu 14/5

14:30-21:30

1 stop6h 00m

Florence Peretola

Wed 20/5

18:05-09:00

1 stop15h 55m

£112

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Wed 8/4

20:10-21:30

2 stops24h 20m

Florence Peretola

Tue 14/4

22:00-11:00

1 stop14h 00m

£117

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Wed 15/4

12:05-22:55

1 stop9h 50m

Florence Peretola

Sat 18/4

22:00-10:15

1 stop13h 15m

£118

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Fri 5/6

14:30-21:20

1 stop5h 50m

Florence Peretola

Mon 8/6

06:55-08:20

Nonstop2h 25m

£118

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Tue 10/2

09:50-22:40

1 stop11h 50m

Florence Peretola

Wed 11/2

20:55-14:15

1 stop18h 20m

£119

Flights are sorted by cheapest return flights first.

Deals found on 14/1

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 9 January 2026.

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, November is the cheapest month in which you can book a flight from London to Siena (average of £15). Flying from London to Siena in August is currently the most expensive (average of £93). 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 16 January 2026.

It’s optimal to fly from London to Siena in the evening. By choosing this option you can save up to 15% on the cost of your flight, compared to a flight in the afternoon.

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 10 January 2026.

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

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 16 January 2026.
Check out reviews from past customers who have flown with Vueling, Ryanair, andeasyJet 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
1,228 reviews
Check prices

Boarding

7.2

Overall

7.1

Comfort

6.8

Entertainment

5.9

Crew

7.7

Food

6.2

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
1,228 reviews
Vueling
7.1
Good
1,228 reviews
Check prices

Boarding

7.2

Overall

7.1

Comfort

6.8

Entertainment

5.9

Crew

7.7

Food

6.2

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
6.9
Okay
5,244 reviews
Vueling
7.1
Good
1,228 reviews
Check prices

Boarding

7.2

Overall

7.1

Comfort

6.8

Entertainment

5.9

Crew

7.7

Food

6.2

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
1,862 reviews
Vueling
7.1
Good
1,228 reviews
Check prices

Boarding

7.2

Overall

7.1

Comfort

6.8

Entertainment

5.9

Crew

7.7

Food

6.2

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
7,718 reviews
Vueling
7.1
Good
1,228 reviews
Check prices

Boarding

7.2

Overall

7.1

Comfort

6.8

Entertainment

5.9

Crew

7.7

Food

6.2

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
7,679 reviews
Vueling
7.1
Good
1,228 reviews
Check prices

Boarding

7.2

Overall

7.1

Comfort

6.8

Entertainment

5.9

Crew

7.7

Food

6.2

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 £87. 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 (£36), 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 (82%), American Airlines (78%) or British Airways (78%) 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 £206, our data shows the cheapest flight currently is £62. When looking at the most popular route, (London Heathrow - Florence Peretola), you can expect to pay £125 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, November is the cheapest month in which you can book a flight from London to Siena (average of £15). Flying from London to Siena in August is currently the most expensive (average of £93). 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.
Heathrow to Leonardo da Vinci/Fiumicino flights
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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 16 January 2026.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£23Average£128FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
easyJetCheapest£34Average£130FlexibilityNo cancel feeOn-time86%
Search easyJet flights
VuelingCheapest£66Average£152FlexibilityNo cancel feeOn-time88%
Search Vueling flights
British AirwaysCheapest£98Average£238FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£111Average£311FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest£132Average£191FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air FranceCheapest£161Average£251FlexibilityNo cancel feeOn-time77%
Search Air France flights
SWISSCheapest£161Average£209FlexibilityNo cancel feeOn-time79%
Search SWISS 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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