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Cheap flights from London to Siena from £78

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 28/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BLQ
23 Jun — 30 Jun1
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 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 24 May 2026.

Sat 13/619:50
LGW
-
FLR
Nonstop2h 15m
Vueling
Fri 19/606:55
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 23/5£138
Mon 1/618:25
STN
-
FLR
1 stop13h 20m
Multiple Airlines
Thu 25/609:15
FLR
-
STN
2 stops13h 25m
Multiple Airlines
Deal found 21/5£138
Mon 22/621:50
LTN
-
FLR
2 stops23h 40m
Multiple Airlines
Thu 25/609:15
FLR
-
LTN
2 stops16h 15m
Multiple Airlines
Deal found 23/5£139
Sat 30/513:40
LGW
-
FLR
1 stop7h 50m
Multiple Airlines
Wed 3/606:25
FLR
-
LGW
Nonstop2h 25m
Multiple Airlines
Deal found 23/5£139
Mon 1/618:25
STN
-
FLR
1 stop13h 20m
Multiple Airlines
Mon 8/619:20
FLR
-
STN
2 stops20h 40m
Multiple Airlines
Deal found 24/5£139
Tue 14/711:40
LTN
-
FLR
2 stops19h 55m
Multiple Airlines
Thu 23/721:55
FLR
-
LTN
1 stop14h 00m
Multiple Airlines
Deal found 20/5£140
Thu 22/1019:55
LGW
-
FLR
Nonstop2h 15m
Vueling
Sun 25/1008:00
FLR
-
LGW
1 stop14h 05m
Vueling
Deal found 23/5£140
Mon 29/618:25
STN
-
FLR
1 stop13h 20m
Multiple Airlines
Wed 1/721:55
FLR
-
STN
1 stop15h 15m
Multiple Airlines
Deal found 21/5£140
Fri 5/605:40
LTN
-
FLR
1 stop14h 40m
Multiple Airlines
Tue 9/613:15
FLR
-
LTN
1 stop10h 25m
Multiple Airlines
Deal found 24/5£141
Thu 28/514:30
LGW
-
FLR
1 stop6h 00m
Vueling
Wed 10/606:25
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 24/5£141
Mon 1/618:25
STN
-
FLR
1 stop13h 20m
Multiple Airlines
Thu 4/606:05
FLR
-
STN
2 stops8h 20m
Multiple Airlines
Deal found 22/5£141
Tue 3/1120:50
LHR
-
FLR
1 stop11h 25m
Iberia
Fri 13/1118:45
FLR
-
LHR
1 stop15h 25m
Iberia
Deal found 20/5£141

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 24 May 2026.

Round-trip from

£138

One-way from

£78

Popular in

May

Cheapest in

January

Average price

£234
Vueling
  • Vueling
  • 13/6-19/6
  • Nonstop
  • 4h 40m total
  • London to Siena
Search Deals
Vueling
  • Vueling
  • 28/9
  • 1 total stop
  • 7h 00m total
  • London to Siena
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£22 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 May 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 24 May 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

Thu 9/7

05:40-18:55

1 stop12h 15m

Florence Peretola

Thu 9/7

21:55-10:55

1 stop14h 00m

£141

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Tue 23/6

05:40-21:25

1 stop14h 45m

Florence Peretola

Thu 25/6

06:05-19:55

2 stops14h 50m

£161

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Wed 8/7

05:40-21:20

1 stop14h 40m

Florence Peretola

Fri 10/7

13:00-08:30

2 stops20h 30m

£162

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Mon 8/6

15:15-08:25

2 stops16h 10m

Florence Peretola

Wed 10/6

06:45-13:45

1 stop8h 00m

£163

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Sun 28/6

05:40-17:45

1 stop11h 05m

Florence Peretola

Wed 1/7

13:10-00:15

1 stop12h 05m

£170

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Mon 13/7

05:40-21:25

1 stop14h 45m

Florence Peretola

Thu 16/7

21:55-10:55

1 stop14h 00m

£170

LondonFlorence

SEN - FLR

SENFLR

London Southend

Sat 10/10

16:50-22:55

1 stop5h 05m

Florence Peretola

Tue 13/10

22:00-07:55

1 stop10h 55m

£172

LondonFlorence

LHR - FLR

LHRFLR

London Heathrow

Fri 19/6

20:55-22:30

1 stop24h 35m

Florence Peretola

Mon 22/6

19:20-09:10

1 stop14h 50m

£173

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Mon 29/6

05:40-13:15

1 stop6h 35m

Florence Peretola

Sat 4/7

17:40-22:40

1 stop6h 00m

£176

LondonFlorence

LHR - FLR

LHRFLR

London Heathrow

Fri 5/6

06:00-22:15

1 stop15h 15m

Florence Peretola

Tue 9/6

07:00-21:40

1 stop15h 40m

£179

Flights are sorted by cheapest return flights first.

Deals found on 24/5

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
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 24 May 2026.

It’s optimal to fly from London to Siena in the evening. By choosing this option you can save up to 4% on the cost of your flight, compared to a flight in the morning.

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 23 May 2026.

Travellers seeking maximum savings on their London to Siena flight should consider departing on Thursday mornings 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.

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 24 May 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
1,274 reviews
Check prices

Food

6.2

Boarding

7.2

Crew

7.7

Overall

7.2

Comfort

6.9

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
1,274 reviews
Vueling
7.2
Good
1,274 reviews
Check prices

Food

6.2

Boarding

7.2

Crew

7.7

Overall

7.2

Comfort

6.9

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
5,380 reviews
Vueling
7.2
Good
1,274 reviews
Check prices

Food

6.2

Boarding

7.2

Crew

7.7

Overall

7.2

Comfort

6.9

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
1,903 reviews
Vueling
7.2
Good
1,274 reviews
Check prices

Food

6.2

Boarding

7.2

Crew

7.7

Overall

7.2

Comfort

6.9

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
8,024 reviews
Vueling
7.2
Good
1,274 reviews
Check prices

Food

6.2

Boarding

7.2

Crew

7.7

Overall

7.2

Comfort

6.9

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
7,998 reviews
Vueling
7.2
Good
1,274 reviews
Check prices

Food

6.2

Boarding

7.2

Crew

7.7

Overall

7.2

Comfort

6.9

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 7h 55m. Austrian Airlines provides one of the quickest options available for as low as £214. 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 (85%), British Airways (83%) or Japan Airlines (83%) 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 £166, our data shows the cheapest flight currently is £78. When looking at the most popular route, (London Heathrow - Florence Peretola), you can expect to pay £146 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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Leeds to Leonardo da Vinci/Fiumicino flights
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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 24 May 2026.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£28Average£109FlexibilityNo cancel feeOn-time86%
Search easyJet flights
RyanairCheapest£33Average£123FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
VuelingCheapest£66Average£169FlexibilityNo cancel feeOn-time88%
Search Vueling flights
British AirwaysCheapest£76Average£236FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£125Average£310FlexibilityNo cancel feeOn-time75%
Search KLM flights
IberiaCheapest£130Average£197FlexibilityNo cancel feeOn-time77%
Search Iberia flights
LufthansaCheapest£142Average£207FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
SWISSCheapest£155Average£220FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Air FranceCheapest£157Average£253FlexibilityNo 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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