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Cheap flights from London to Siena from £73

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 29/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BLQ
11 Jul — 18 Jul1
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 11 June 2026.

Mon 6/718:05
LTN
-
FLR
1 stop13h 20m
Multiple Airlines
Wed 8/721:55
FLR
-
LTN
1 stop14h 05m
Multiple Airlines
Deal found 6/6£137
Mon 6/717:55
STN
-
FLR
2 stops13h 30m
Multiple Airlines
Wed 8/721:55
FLR
-
STN
1 stop15h 15m
Multiple Airlines
Deal found 6/6£137
Wed 8/712:45
LTN
-
FLR
1 stop9h 10m
Multiple Airlines
Wed 15/721:55
FLR
-
LTN
1 stop14h 05m
Multiple Airlines
Deal found 10/6£137
Tue 6/1010:30
LHR
-
FLR
1 stop11h 10m
ITA Airways
Mon 12/1019:00
FLR
-
LHR
1 stop15h 40m
ITA Airways
Deal found 10/6£137
Wed 1/716:30
LGW
-
FLR
1 stop5h 25m
Vueling
Wed 8/706:25
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 7/6£137
Sun 21/606:45
STN
-
FLR
1 stop4h 40m
Multiple Airlines
Tue 23/606:05
FLR
-
STN
2 stops18h 20m
Multiple Airlines
Deal found 10/6£137
Tue 7/705:40
LTN
-
FLR
1 stop14h 45m
Multiple Airlines
Thu 9/709:00
FLR
-
LTN
1 stop14h 40m
Multiple Airlines
Deal found 9/6£138
Sun 28/619:50
LGW
-
FLR
Nonstop2h 15m
Vueling
Tue 7/706:25
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 10/6£138
Tue 7/706:30
SEN
-
FLR
1 stop25h 05m
Multiple Airlines
Mon 13/722:00
FLR
-
SEN
1 stop14h 20m
Multiple Airlines
Deal found 6/6£138
Sun 14/606:45
STN
-
FLR
1 stop4h 40m
Multiple Airlines
Wed 1/706:15
FLR
-
STN
1 stop17h 45m
Multiple Airlines
Deal found 10/6£138
Tue 16/608:00
LTN
-
FLR
1 stop9h 10m
Multiple Airlines
Wed 17/609:35
FLR
-
LTN
1 stop8h 45m
Multiple Airlines
Deal found 10/6£139
Sat 13/613:40
LGW
-
FLR
1 stop7h 50m
Multiple Airlines
Wed 17/606:25
FLR
-
LGW
Nonstop2h 25m
Multiple Airlines
Deal found 7/6£139

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 11 June 2026.

Round-trip from

£137

One-way from

£73

Popular in

May

Cheapest in

January

Average price

£214
6/7-8/7
  • 6/7-8/7
  • 2 total stops
  • 27h 25m total
  • London to Siena
Search Deals
29/6
  • 29/6
  • 1 total stop
  • 7h 40m total
  • London to Siena
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£19 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 11 June 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

Mon 6/7

18:05-08:25

1 stop13h 20m

Florence Peretola

Wed 8/7

21:55-11:00

1 stop14h 05m

£137

LondonFlorence

SEN - FLR

SENFLR

London Southend

Tue 7/7

06:30-08:35

1 stop25h 05m

Florence Peretola

Mon 13/7

22:00-11:20

1 stop14h 20m

£138

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Sat 20/6

12:45-21:25

1 stop7h 40m

Florence Peretola

Wed 24/6

13:10-00:15

1 stop12h 05m

£146

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Thu 17/9

20:35-22:30

2 stops24h 55m

Florence Peretola

Sun 20/9

18:45-19:55

2 stops26h 10m

£158

LondonFlorence

LHR - FLR

LHRFLR

London Heathrow

Sun 15/11

10:30-18:15

1 stop6h 45m

Florence Peretola

Thu 19/11

11:25-15:40

1 stop5h 15m

£161

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Wed 8/7

12:45-22:55

1 stop9h 10m

Florence Peretola

Sat 11/7

17:10-23:50

1 stop7h 40m

£166

LondonFlorence

LHR - FLR

LHRFLR

London Heathrow

Mon 14/9

20:50-08:25

1 stop10h 35m

Florence Peretola

Thu 17/9

22:05-09:10

1 stop12h 05m

£168

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Sun 21/6

07:05-13:25

1 stop5h 20m

Florence Peretola

Thu 25/6

09:15-00:30

2 stops16h 15m

£173

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Sat 20/6

19:50-23:05

Nonstop2h 15m

Florence Peretola

Thu 25/6

07:35-09:00

Nonstop2h 25m

£177

LondonFlorence

LCY - FLR

LCYFLR

London City

Sun 27/9

16:30-14:45

2 stops21h 15m

Florence Peretola

Thu 1/10

06:25-21:05

2 stops15h 40m

£181

Flights are sorted by cheapest return flights first.

Deals found on 7/6

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 11 June 2026.

It’s optimal to fly from London to Siena in the evening. By choosing this option you can save up to 3% 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 8 June 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 11 June 2026.
Check out reviews from past customers who have flown with Vueling,Iberia, andRyanair 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
1,275 reviews
Check prices

Entertainment

5.9

Boarding

7.2

Food

6.2

Overall

7.2

Comfort

6.9

Crew

7.7

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
1,275 reviews
Vueling
7.2
Good
1,275 reviews
Check prices

Entertainment

5.9

Boarding

7.2

Food

6.2

Overall

7.2

Comfort

6.9

Crew

7.7

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
Iberia
7.0
Good
3,232 reviews
Vueling
7.2
Good
1,275 reviews
Check prices

Entertainment

5.9

Boarding

7.2

Food

6.2

Overall

7.2

Comfort

6.9

Crew

7.7

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
5,404 reviews
Vueling
7.2
Good
1,275 reviews
Check prices

Entertainment

5.9

Boarding

7.2

Food

6.2

Overall

7.2

Comfort

6.9

Crew

7.7

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
8,052 reviews
Vueling
7.2
Good
1,275 reviews
Check prices

Entertainment

5.9

Boarding

7.2

Food

6.2

Overall

7.2

Comfort

6.9

Crew

7.7

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
8,042 reviews
Vueling
7.2
Good
1,275 reviews
Check prices

Entertainment

5.9

Boarding

7.2

Food

6.2

Overall

7.2

Comfort

6.9

Crew

7.7

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 15m. ITA Airways provides one of the quickest options available for as low as £182. The distance between London and Siena is about 756 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 (84%), British Airways (84%) or American Airlines (82%) 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 £187, our data shows the cheapest flight currently is £79. When looking at the most popular route, (London Heathrow - Florence Peretola), you can expect to pay £126 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 11 June 2026.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£28Average£109FlexibilityNo cancel feeOn-time86%
Search easyJet flights
RyanairCheapest£32Average£125FlexibilityNo 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£290FlexibilityNo cancel feeOn-time75%
Search KLM flights
IberiaCheapest£131Average£198FlexibilityNo cancel feeOn-time77%
Search Iberia flights
LufthansaCheapest£142Average£202FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air FranceCheapest£158Average£270FlexibilityNo cancel feeOn-time77%
Search Air France flights
SWISSCheapest£162Average£221FlexibilityNo 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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