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Cheap flights from London to Siena from £58

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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BLQ
18 Jun — 25 Jun1
1 adult

Cheapflights Tip: The best prices from London to Siena are usually found in January or November, booked 66 days in advance, depart on a Tuesday or Wednesday and return on a Monday

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 13 June 2025.

Round-trip from

£127

One-way from

£58

Popular in

August

Cheapest in

January

Average price

£189
Vueling
  • Vueling
  • 31/7-4/8
  • Nonstop
  • 4h 50m total
  • London to Siena
Search Deals
Vueling
  • Vueling
  • 5/7
  • Nonstop
  • 2h 15m total
  • London to Siena
Search Deals
Highest demand for flights based on searches. 19% 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 June 2025
Search Deals

Find flight deals from London to Siena

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 13 June 2025.

Thu 31/716:30LGW - FLR
Nonstop2h 25mVueling
Mon 4/806:55FLR - LGW
Nonstop2h 25mVueling
Deal found 11/6£127
Wed 2/717:40LGW - FLR
1 stop27h 50mMultiple Airlines
Wed 23/706:45FLR - LGW
2 stops26h 30mMultiple Airlines
Deal found 11/6£128
Thu 3/707:25LHR - FLR
1 stop11h 50mLufthansa
Thu 24/708:15FLR - LHR
1 stop9h 50mLufthansa
Deal found 11/6£129
Thu 6/1108:25LCY - FLR
1 stop5h 20mITA Airways
Sat 8/1119:10FLR - LCY
2 stops21h 55mITA Airways
Deal found 11/6£131
Fri 4/719:30LHR - FLR
1 stop21h 15mAustrian Airlines
Wed 16/711:00FLR - LHR
1 stop11h 40mAustrian Airlines
Deal found 11/6£132
Tue 1/722:05STN - FLR
2 stops14h 40mMultiple Airlines
Tue 15/720:30FLR - STN
1 stop22h 00mMultiple Airlines
Deal found 12/6£132
Thu 3/712:05LGW - FLR
1 stop9h 35mITA Airways
Wed 23/715:30FLR - LGW
1 stop20h 45mITA Airways
Deal found 12/6£134
Sun 5/1011:05LHR - FLR
1 stop22h 40mBrussels Airlines
Fri 10/1011:30FLR - LHR
1 stop10h 25mBrussels Airlines
Deal found 12/6£135
Tue 1/709:05LHR - FLR
1 stop7h 40mMultiple Airlines
Tue 15/709:45FLR - LHR
1 stop6h 55mMultiple Airlines
Deal found 12/6£138
Mon 6/1008:35LCY - FLR
Nonstop2h 10mBritish Airways
Fri 10/1015:10FLR - LCY
Nonstop2h 15mBritish Airways
Deal found 12/6£139
Tue 1/706:00LTN - FLR
1 stop27h 00mMultiple Airlines
Tue 15/720:30FLR - LTN
2 stops22h 00mMultiple Airlines
Deal found 12/6£141
Thu 19/618:40LGW - FLR
1 stop14h 05mSWISS
Wed 25/619:15FLR - LGW
1 stop23h 40mSWISS
Deal found 12/6£156

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 13 June 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 31/7

16:30-19:55

Nonstop2h 25m

Florence Peretola

Mon 4/8

06:55-08:20

Nonstop2h 25m

£127

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Wed 2/7

17:40-22:30

1 stop27h 50m

Florence Peretola

Wed 23/7

06:45-08:15

2 stops26h 30m

£128

LondonFlorence

LHR - FLR

LHRFLR

London Heathrow

Thu 3/7

07:25-20:15

1 stop11h 50m

Florence Peretola

Thu 24/7

08:15-17:05

1 stop9h 50m

£129

LondonFlorence

LCY - FLR

LCYFLR

London City

Thu 6/11

08:25-14:45

1 stop5h 20m

Florence Peretola

Sat 8/11

19:10-16:05

2 stops21h 55m

£131

LondonFlorence

LHR - FLR

LHRFLR

London Heathrow

Fri 4/7

19:30-17:45

1 stop21h 15m

Florence Peretola

Wed 16/7

11:00-21:40

1 stop11h 40m

£132

LondonFlorence

STN - FLR

STNFLR

London Stansted

Tue 1/7

22:05-13:45

2 stops14h 40m

Florence Peretola

Tue 15/7

20:30-17:30

1 stop22h 00m

£132

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Thu 3/7

12:05-22:40

1 stop9h 35m

Florence Peretola

Wed 23/7

15:30-11:15

1 stop20h 45m

£134

LondonFlorence

LHR - FLR

LHRFLR

London Heathrow

Sun 5/10

11:05-10:45

1 stop22h 40m

Florence Peretola

Fri 10/10

11:30-20:55

1 stop10h 25m

£135

LondonFlorence

LHR - FLR

LHRFLR

London Heathrow

Tue 1/7

09:05-17:45

1 stop7h 40m

Florence Peretola

Tue 15/7

09:45-15:40

1 stop6h 55m

£138

LondonFlorence

LCY - FLR

LCYFLR

London City

Mon 6/10

08:35-11:45

Nonstop2h 10m

Florence Peretola

Fri 10/10

15:10-16:25

Nonstop2h 15m

£139

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 53 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 June 2025.

To ensure you get the cheapest price possible for a flight from London to Siena, you should look to book at least 66 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 £118). Flying from London to Siena in May is currently the most expensive (average of £222). 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 13 June 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to Siena as you normally would.

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 Saturday at midday when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Siena by month

Plan your trip to Siena by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Siena ranges from 30.0 - 100.0 inches per month. October is typically the wettest month, when rainfall can reach 100.0 mm. July is typically the driest time to visit Siena when rainfall is around 30.0 mm.

Temperature in Siena by month

Plan your trip to Siena by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Siena, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 24.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

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 13 June 2025.
Peruse reviews from past customers who have flown with KLM, Austrian Airlines and Air France from London to Siena to help guide your decision. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,358 reviews
Check prices

Entertainment

7.1

Crew

8.4

Overall

7.8

Comfort

7.7

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
KLM
7.8
Good
1,358 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Entertainment

7.1

Crew

8.4

Overall

7.8

Comfort

7.7

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
Austrian Airlines
7.6
Good
802 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Entertainment

7.1

Crew

8.4

Overall

7.8

Comfort

7.7

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
Air France
7.5
Good
1,463 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Entertainment

7.1

Crew

8.4

Overall

7.8

Comfort

7.7

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
SWISS
7.5
Good
1,624 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Entertainment

7.1

Crew

8.4

Overall

7.8

Comfort

7.7

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
Brussels Airlines
7.4
Good
355 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Entertainment

7.1

Crew

8.4

Overall

7.8

Comfort

7.7

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.

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.

  • 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 (£58), British Airways (£66), and Scandinavian Airlines (£82).

  • 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 (88%), American Airlines (87%) or British Airways (86%) 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 £336, our data shows the cheapest flight currently is £61. When looking at the most popular route, (London Heathrow - Florence Peretola), you can expect to pay £129 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 £118). Flying from London to Siena in May is currently the most expensive (average of £222). 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 9 airlines flying from London to Siena

Discover the top 9 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 13 June 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£25Average£112FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
easyJetCheapest£45Average£138FlexibilityNo cancel feeOn-time86%
Search easyJet flights
VuelingCheapest£58Average£161FlexibilityNo cancel feeOn-time88%
Search Vueling flights
KLMCheapest£83Average£193FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£89Average£242FlexibilityNo cancel feeOn-time70%
Search British Airways flights
SWISSCheapest£119Average£186FlexibilityNo cancel feeOn-time79%
Search SWISS flights
LufthansaCheapest£123Average£183FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Brussels AirlinesCheapest£145Average£174FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
Air FranceCheapest£145Average£212FlexibilityNo cancel feeOn-time77%
Search Air France flights

Fly with Cheapflights

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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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