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Cheap flights from London to Siena from £64

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 15/10. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BLQ
8 Aug — 15 Aug1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Siena are usually found in January or November, booked 89 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

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 9 July 2026.

Tue 29/919:40
LGW
-
FLR
Nonstop2h 15m
Vueling
Thu 1/1022:05
FLR
-
LGW
1 stop11h 25m
Vueling
Deal found 7/7£112
Thu 17/919:55
LGW
-
FLR
Nonstop2h 15m
Multiple Airlines
Mon 21/910:20
FLR
-
LGW
1 stop13h 25m
Multiple Airlines
Deal found 8/7£114
Tue 18/819:40
LGW
-
FLR
Nonstop2h 15m
Vueling
Thu 27/807:35
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 8/7£114
Thu 3/912:45
LTN
-
FLR
1 stop7h 35m
Multiple Airlines
Mon 7/914:40
FLR
-
LTN
1 stop27h 40m
Multiple Airlines
Deal found 9/7£115
Thu 3/919:55
LGW
-
FLR
Nonstop2h 15m
Vueling
Mon 7/906:55
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 9/7£115
Wed 29/706:15
STN
-
FLR
1 stop9h 50m
Multiple Airlines
Tue 4/822:00
FLR
-
STN
1 stop10h 20m
Multiple Airlines
Deal found 8/7£115
Tue 4/819:40
LGW
-
FLR
Nonstop2h 15m
Vueling
Thu 6/807:35
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 8/7£116
Tue 15/920:35
LTN
-
FLR
2 stops20h 35m
Multiple Airlines
Tue 22/909:00
FLR
-
LTN
1 stop10h 05m
Multiple Airlines
Deal found 8/7£117
Sat 3/1015:00
LGW
-
FLR
1 stop6h 55m
Vueling
Thu 8/1007:35
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 8/7£117
Tue 15/917:20
STN
-
FLR
2 stops23h 50m
Multiple Airlines
Tue 22/918:50
FLR
-
STN
2 stops27h 05m
Multiple Airlines
Deal found 9/7£117
Thu 17/919:55
LGW
-
FLR
Nonstop2h 15m
Vueling
Mon 21/906:55
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 8/7£117
Thu 30/719:55
LGW
-
FLR
Nonstop2h 15m
Vueling
Tue 4/817:40
FLR
-
LGW
Nonstop2h 20m
Vueling
Deal found 8/7£118

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 9 July 2026.

Round-trip from

£112

One-way from

£64

Popular in

May

Cheapest in

January

Average price

£218
Vueling
  • Vueling
  • 29/9-1/10
  • 1 total stop
  • 13h 40m total
  • London to Siena
Search Deals
15/10
  • 15/10
  • 1 total stop
  • 19h 10m total
  • London to Siena
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£17 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 July 2026
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 9 July 2026.
Use the filters below to find and compare flights from London to Siena that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Wed 29/7

12:45-22:55

1 stop9h 10m

Florence Peretola

Wed 5/8

13:10-00:15

1 stop12h 05m

£129

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Mon 14/9

13:35-22:05

1 stop7h 30m

Florence Peretola

Fri 18/9

06:15-18:25

1 stop13h 10m

£129

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Thu 3/9

14:30-21:20

1 stop5h 50m

Florence Peretola

Mon 7/9

22:00-08:30

1 stop11h 30m

£130

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Tue 29/9

17:45-08:20

1 stop13h 35m

Florence Peretola

Thu 1/10

22:05-10:55

1 stop13h 50m

£130

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Sat 19/9

12:45-22:55

1 stop9h 10m

Florence Peretola

Thu 24/9

18:45-19:55

2 stops26h 10m

£132

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Fri 4/9

12:45-21:20

1 stop7h 35m

Florence Peretola

Fri 18/9

06:15-18:25

1 stop13h 10m

£141

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Sun 2/8

19:50-23:05

Nonstop2h 15m

Florence Peretola

Mon 3/8

22:00-08:30

1 stop11h 30m

£144

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Thu 15/10

17:30-08:25

1 stop13h 55m

Florence Peretola

Sun 18/10

14:45-11:00

2 stops21h 15m

£147

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Fri 16/10

10:55-21:20

1 stop9h 25m

Florence Peretola

Sun 18/10

06:25-07:50

Nonstop2h 25m

£148

LondonFlorence

LHR - FLR

LHRFLR

London Heathrow

Fri 18/9

16:30-22:40

1 stop5h 10m

Florence Peretola

Mon 21/9

19:00-09:40

1 stop15h 40m

£150

Flights are sorted by cheapest return flights first.

Deals found on 4/7

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
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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

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 9 July 2026.

It’s optimal to fly from London to Siena in the afternoon. By choosing this option you can save up to 3% on the cost of your flight, compared to a flight at midday.

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

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 4 July 2026.

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. Saturday evenings 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 9 July 2026.
Check out reviews from past customers who have flown with Vueling,Iberia, 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
7.2
Good
1,289 reviews
Check prices

Entertainment

5.9

Boarding

7.2

Comfort

6.9

Crew

7.7

Food

6.2

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2024

LGW - BCN

Rude Air hostess, looks tired...no smile, no food, not even water although i understnad its 2 hours flight. No hand luggage included in price. Worst airline ever...so tight sitting arrangement
Vueling
7.2
Good
1,289 reviews
Vueling
7.2
Good
1,289 reviews
Check prices

Entertainment

5.9

Boarding

7.2

Comfort

6.9

Crew

7.7

Food

6.2

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2024

LGW - BCN

Rude Air hostess, looks tired...no smile, no food, not even water although i understnad its 2 hours flight. No hand luggage included in price. Worst airline ever...so tight sitting arrangement
Iberia
7.0
Good
3,251 reviews
Vueling
7.2
Good
1,289 reviews
Check prices

Entertainment

5.9

Boarding

7.2

Comfort

6.9

Crew

7.7

Food

6.2

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2024

LGW - BCN

Rude Air hostess, looks tired...no smile, no food, not even water although i understnad its 2 hours flight. No hand luggage included in price. Worst airline ever...so tight sitting arrangement
easyJet
6.9
Okay
1,915 reviews
Vueling
7.2
Good
1,289 reviews
Check prices

Entertainment

5.9

Boarding

7.2

Comfort

6.9

Crew

7.7

Food

6.2

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2024

LGW - BCN

Rude Air hostess, looks tired...no smile, no food, not even water although i understnad its 2 hours flight. No hand luggage included in price. Worst airline ever...so tight sitting arrangement
Lufthansa
6.8
Okay
8,127 reviews
Vueling
7.2
Good
1,289 reviews
Check prices

Entertainment

5.9

Boarding

7.2

Comfort

6.9

Crew

7.7

Food

6.2

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2024

LGW - BCN

Rude Air hostess, looks tired...no smile, no food, not even water although i understnad its 2 hours flight. No hand luggage included in price. Worst airline ever...so tight sitting arrangement
British Airways
6.7
Okay
8,106 reviews
Vueling
7.2
Good
1,289 reviews
Check prices

Entertainment

5.9

Boarding

7.2

Comfort

6.9

Crew

7.7

Food

6.2

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2024

LGW - BCN

Rude Air hostess, looks tired...no smile, no food, not even water although i understnad its 2 hours flight. No hand luggage included in price. Worst airline ever...so tight sitting arrangement

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 £164. 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 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 Qatar Airways (78%), British Airways (78%) or Japan Airlines (76%) 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 £161, our data shows the cheapest flight currently is £83. When looking at the most popular route, (London Heathrow - Florence Peretola), you can expect to pay £132 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.

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 9 July 2026.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£28Average£106FlexibilityNo cancel feeOn-time86%
Search easyJet flights
RyanairCheapest£32Average£115FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
VuelingCheapest£66Average£168FlexibilityNo cancel feeOn-time88%
Search Vueling flights
British AirwaysCheapest£76Average£236FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£125Average£290FlexibilityNo cancel feeOn-time75%
Search KLM flights
IberiaCheapest£131Average£205FlexibilityNo cancel feeOn-time77%
Search Iberia flights
LufthansaCheapest£141Average£212FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air FranceCheapest£157Average£270FlexibilityNo cancel feeOn-time77%
Search Air France flights
SWISSCheapest£162Average£210FlexibilityNo 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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