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Cheap flights from London to Siena from £70

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 28/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BLQ
19 May — 26 May1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Siena are usually found in January or November, booked 55 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

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 19 April 2026.

Sat 9/518:15
LTN
-
FLR
1 stop13h 00m
Multiple Airlines
Mon 11/522:00
FLR
-
LTN
1 stop14h 00m
Multiple Airlines
Deal found 16/4£142
Mon 4/509:00
LGW
-
FLR
Nonstop2h 20m
Vueling
Fri 8/506:55
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 15/4£142
Wed 6/515:05
LGW
-
FLR
Nonstop2h 20m
Vueling
Sun 10/506:25
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 14/4£143
Wed 29/412:45
LTN
-
FLR
1 stop9h 10m
Multiple Airlines
Sat 2/514:10
FLR
-
LTN
1 stop10h 40m
Multiple Airlines
Deal found 14/4£143
Thu 14/513:35
LGW
-
FLR
1 stop6h 55m
Vueling
Thu 21/522:05
FLR
-
LGW
1 stop11h 55m
Vueling
Deal found 14/4£143
Mon 4/511:40
STN
-
FLR
2 stops32h 45m
Multiple Airlines
Wed 13/514:50
FLR
-
STN
1 stop8h 55m
Multiple Airlines
Deal found 14/4£143
Mon 1/615:15
LTN
-
FLR
2 stops16h 10m
Multiple Airlines
Mon 8/606:15
FLR
-
LTN
2 stops23h 40m
Multiple Airlines
Deal found 17/4£144
Thu 7/516:30
LGW
-
FLR
Nonstop2h 25m
Vueling
Sun 10/506:25
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 18/4£144
Sat 9/505:55
STN
-
FLR
2 stops16h 20m
Multiple Airlines
Mon 11/510:30
FLR
-
STN
2 stops27h 15m
Multiple Airlines
Deal found 15/4£144
Sun 10/508:40
LGW
-
FLR
Nonstop2h 25m
Vueling
Wed 13/512:35
FLR
-
LGW
Nonstop2h 30m
Vueling
Deal found 16/4£145
Thu 23/417:35
STN
-
FLR
1 stop13h 50m
Multiple Airlines
Mon 27/406:15
FLR
-
STN
2 stops17h 00m
Multiple Airlines
Deal found 15/4£145
Tue 1/913:45
LCY
-
FLR
2 stops7h 55m
ITA Airways
Thu 10/906:25
FLR
-
LCY
2 stops10h 30m
ITA Airways
Deal found 16/4£145

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 19 April 2026.

Round-trip from

£142

One-way from

£70

Popular in

July

Cheapest in

January

Average price

£200
9/5-11/5
  • 9/5-11/5
  • 2 total stops
  • 27h 00m total
  • London to Siena
Search Deals
28/4
  • 28/4
  • 1 total stop
  • 18h 50m total
  • London to Siena
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£24 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 April 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 19 April 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 3/6

20:35-22:30

2 stops24h 55m

Florence Peretola

Sat 6/6

19:15-04:55

2 stops10h 40m

£143

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Sat 9/5

18:15-08:15

1 stop13h 00m

Florence Peretola

Fri 15/5

18:45-04:55

2 stops11h 10m

£144

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Sun 31/5

17:20-13:50

2 stops19h 30m

Florence Peretola

Tue 2/6

19:00-08:30

1 stop14h 30m

£146

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Tue 9/6

19:50-22:30

2 stops25h 40m

Florence Peretola

Fri 12/6

19:00-08:30

1 stop14h 30m

£148

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Sun 7/6

17:20-13:50

2 stops19h 30m

Florence Peretola

Wed 17/6

13:10-11:00

2 stops22h 50m

£149

LondonFlorence

SEN - FLR

SENFLR

London Southend

Sat 30/5

16:50-22:55

1 stop5h 05m

Florence Peretola

Tue 2/6

07:25-07:55

2 stops25h 30m

£149

LondonFlorence

SEN - FLR

SENFLR

London Southend

Sat 16/5

16:50-22:55

1 stop5h 05m

Florence Peretola

Tue 19/5

22:00-07:55

1 stop10h 55m

£149

LondonFlorence

SEN - FLR

SENFLR

London Southend

Wed 13/5

08:25-22:55

1 stop13h 30m

Florence Peretola

Tue 19/5

22:00-07:55

1 stop10h 55m

£151

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Sun 17/5

21:50-22:05

2 stops23h 15m

Florence Peretola

Fri 22/5

06:15-18:25

1 stop13h 10m

£158

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Sun 21/6

07:05-13:25

1 stop5h 20m

Florence Peretola

Tue 23/6

19:00-08:30

1 stop14h 30m

£158

Flights are sorted by cheapest return flights first.

Deals found on 17/4

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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 17 April 2026.

To ensure you get the cheapest price possible for a flight from London to Siena, you should look to book at least 55 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 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 19 April 2026.

It’s optimal to fly from London to Siena in the evening. By choosing this option you can save up to 5% 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 11 April 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. Sunday 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 19 April 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
7.2
Good
1,261 reviews
Check prices

Crew

7.7

Overall

7.2

Comfort

6.8

Food

6.2

Boarding

7.2

Entertainment

5.9

Reviews

1 / 20
10.0
Excellent

Luis Alfonso,Feb 2026

BCN - ALC

In overall good. The crew were very nice as always. I must say it is the tidiest airline when it comes to disembarkation
Vueling
7.2
Good
1,261 reviews
Vueling
7.2
Good
1,261 reviews
Check prices

Crew

7.7

Overall

7.2

Comfort

6.8

Food

6.2

Boarding

7.2

Entertainment

5.9

Reviews

1 / 20
10.0
Excellent

Luis Alfonso,Feb 2026

BCN - ALC

In overall good. The crew were very nice as always. I must say it is the tidiest airline when it comes to disembarkation
Ryanair
6.9
Okay
5,339 reviews
Vueling
7.2
Good
1,261 reviews
Check prices

Crew

7.7

Overall

7.2

Comfort

6.8

Food

6.2

Boarding

7.2

Entertainment

5.9

Reviews

1 / 20
10.0
Excellent

Luis Alfonso,Feb 2026

BCN - ALC

In overall good. The crew were very nice as always. I must say it is the tidiest airline when it comes to disembarkation
easyJet
6.9
Okay
1,893 reviews
Vueling
7.2
Good
1,261 reviews
Check prices

Crew

7.7

Overall

7.2

Comfort

6.8

Food

6.2

Boarding

7.2

Entertainment

5.9

Reviews

1 / 20
10.0
Excellent

Luis Alfonso,Feb 2026

BCN - ALC

In overall good. The crew were very nice as always. I must say it is the tidiest airline when it comes to disembarkation
Lufthansa
6.8
Okay
7,930 reviews
Vueling
7.2
Good
1,261 reviews
Check prices

Crew

7.7

Overall

7.2

Comfort

6.8

Food

6.2

Boarding

7.2

Entertainment

5.9

Reviews

1 / 20
10.0
Excellent

Luis Alfonso,Feb 2026

BCN - ALC

In overall good. The crew were very nice as always. I must say it is the tidiest airline when it comes to disembarkation
British Airways
6.7
Okay
7,893 reviews
Vueling
7.2
Good
1,261 reviews
Check prices

Crew

7.7

Overall

7.2

Comfort

6.8

Food

6.2

Boarding

7.2

Entertainment

5.9

Reviews

1 / 20
10.0
Excellent

Luis Alfonso,Feb 2026

BCN - ALC

In overall good. The crew were very nice as always. I must say it is the tidiest airline when it comes to disembarkation

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. ITA Airways provides one of the quickest options available for as low as £211. 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 (£34), British Airways (£66), and Austrian Airlines (£90).

  • 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 British Airways (87%), Japan Airlines (87%) or Qatar Airways (84%) 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 £173, our data shows the cheapest flight currently is £98. When looking at the most popular route, (London Heathrow - Florence Peretola), you can expect to pay £128 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

Browse thousands of different options on Cheapflights for your next trip

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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.
Gatwick to Leonardo da Vinci/Fiumicino flights
Heathrow to Leonardo da Vinci/Fiumicino flights
Luton to Leonardo da Vinci/Fiumicino flights
London City to Leonardo da Vinci/Fiumicino flights
Stansted to Leonardo da Vinci/Fiumicino flights
Stansted to Ciampino flights
Heathrow to Florence flights
Gatwick to Pisa flights
London City to Florence flights
Manchester to Leonardo da Vinci/Fiumicino flights
Luton to Ciampino flights
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Heathrow to Pisa flights
Luton to Pisa flights
Stansted to Florence flights
London City to Pisa flights
Manchester to Ciampino flights
Stansted to Pisa flights
Luton to Florence flights
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Bristol to Leonardo da Vinci/Fiumicino flights
Birmingham to Leonardo da Vinci/Fiumicino flights
Heathrow to Ciampino flights
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Southend to Leonardo da Vinci/Fiumicino flights
Edinburgh to Ciampino flights
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Newcastle upon Tyne to Leonardo da Vinci/Fiumicino flights
Manchester to Florence flights
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Bristol to Pisa flights
Liverpool to Leonardo da Vinci/Fiumicino flights
Southend to Florence flights
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Southend to Pisa flights
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Leeds to Pisa 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 19 April 2026.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£28Average£113FlexibilityNo cancel feeOn-time86%
Search easyJet flights
RyanairCheapest£32Average£122FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
VuelingCheapest£66Average£170FlexibilityNo cancel feeOn-time88%
Search Vueling flights
British AirwaysCheapest£75Average£231FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IberiaCheapest£130Average£196FlexibilityNo cancel feeOn-time77%
Search Iberia flights
LufthansaCheapest£141Average£199FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air FranceCheapest£159Average£252FlexibilityNo cancel feeOn-time77%
Search Air France flights
SWISSCheapest£160Average£219FlexibilityNo 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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