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Cheap flights from London to Siena from £74

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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BLQ
14 Jun — 21 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 15 May 2026.

Mon 1/613:35
LTN
-
FLR
1 stop7h 30m
Multiple Airlines
Wed 3/609:35
FLR
-
LTN
1 stop8h 45m
Multiple Airlines
Deal found 14/5£145
Mon 1/613:50
LGW
-
FLR
1 stop7h 15m
Multiple Airlines
Thu 4/622:05
FLR
-
LGW
1 stop13h 10m
Multiple Airlines
Deal found 13/5£145
Mon 22/620:50
STN
-
FLR
1 stop10h 35m
Multiple Airlines
Thu 25/621:55
FLR
-
STN
1 stop10h 15m
Multiple Airlines
Deal found 15/5£145
Tue 19/520:55
LTN
-
FLR
2 stops19h 10m
Multiple Airlines
Sat 23/522:00
FLR
-
LTN
1 stop14h 00m
Multiple Airlines
Deal found 14/5£146
Sat 30/515:00
LGW
-
FLR
1 stop6h 55m
Vueling
Sat 6/617:45
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 14/5£146
Mon 29/620:50
STN
-
FLR
1 stop10h 35m
Multiple Airlines
Thu 2/721:55
FLR
-
STN
1 stop10h 15m
Multiple Airlines
Deal found 14/5£146
Sat 30/520:50
LHR
-
FLR
1 stop10h 25m
Iberia
Fri 5/621:55
FLR
-
LHR
1 stop12h 15m
Iberia
Deal found 14/5£147
Sun 17/519:50
LGW
-
FLR
Nonstop2h 15m
Vueling
Tue 19/506:25
FLR
-
LGW
Nonstop2h 25m
Vueling
Deal found 12/5£147
Mon 1/617:20
STN
-
FLR
1 stop14h 05m
Multiple Airlines
Thu 4/622:05
FLR
-
STN
1 stop10h 05m
Multiple Airlines
Deal found 13/5£147
Wed 23/906:45
LCY
-
FLR
2 stops10h 30m
ITA Airways
Tue 29/911:25
FLR
-
LCY
2 stops10h 40m
ITA Airways
Deal found 11/5£147
Mon 18/516:40
LTN
-
FLR
2 stops23h 25m
Multiple Airlines
Thu 21/522:05
FLR
-
LTN
1 stop13h 50m
Multiple Airlines
Deal found 11/5£148
Sat 30/520:50
LHR
-
FLR
1 stop10h 25m
Iberia
Thu 4/622:05
FLR
-
LHR
1 stop12h 05m
Iberia
Deal found 14/5£148

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 15 May 2026.

Round-trip from

£145

One-way from

£74

Popular in

May

Cheapest in

January

Average price

£233
1/6-3/6
  • 1/6-3/6
  • 2 total stops
  • 16h 15m total
  • London to Siena
Search Deals
Vueling
  • Vueling
  • 8/7
  • 1 total stop
  • 23h 30m 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 15 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

LGW - FLR

LGWFLR

London Gatwick

Sat 30/5

15:00-22:55

1 stop6h 55m

Florence Peretola

Tue 2/6

22:00-10:15

1 stop13h 15m

£148

LondonFlorence

SEN - FLR

SENFLR

London Southend

Sat 20/6

16:50-22:55

1 stop5h 05m

Florence Peretola

Thu 25/6

09:00-21:50

1 stop13h 50m

£148

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Thu 16/7

05:40-21:20

1 stop14h 40m

Florence Peretola

Sun 19/7

19:00-08:30

1 stop14h 30m

£149

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Sun 7/6

05:40-08:25

1 stop25h 45m

Florence Peretola

Fri 12/6

19:00-08:30

1 stop14h 30m

£149

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Sun 14/6

09:15-22:40

1 stop12h 25m

Florence Peretola

Wed 17/6

09:10-18:05

1 stop9h 55m

£149

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Thu 9/7

05:40-21:20

1 stop14h 40m

Florence Peretola

Mon 13/7

22:00-11:00

1 stop14h 00m

£150

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Fri 10/7

19:40-08:30

1 stop11h 50m

Florence Peretola

Mon 13/7

22:00-11:00

1 stop14h 00m

£151

LondonFlorence

LGW - FLR

LGWFLR

London Gatwick

Mon 7/9

19:50-23:05

Nonstop2h 15m

Florence Peretola

Fri 11/9

21:55-08:30

1 stop11h 35m

£151

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Sat 4/7

18:15-08:05

1 stop12h 50m

Florence Peretola

Mon 6/7

22:00-11:00

1 stop14h 00m

£156

LondonFlorence

LTN - FLR

LTNFLR

London Luton

Mon 6/7

21:50-21:25

2 stops22h 35m

Florence Peretola

Fri 17/7

21:55-11:00

1 stop14h 05m

£160

Flights are sorted by cheapest return flights first.

Deals found on 11/5

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 15 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.

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 9 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.

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 15 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
1,273 reviews
Check prices

Boarding

7.2

Crew

7.7

Food

6.2

Comfort

6.8

Entertainment

5.9

Overall

7.2

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
1,273 reviews
Vueling
7.2
Good
1,273 reviews
Check prices

Boarding

7.2

Crew

7.7

Food

6.2

Comfort

6.8

Entertainment

5.9

Overall

7.2

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
5,374 reviews
Vueling
7.2
Good
1,273 reviews
Check prices

Boarding

7.2

Crew

7.7

Food

6.2

Comfort

6.8

Entertainment

5.9

Overall

7.2

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
1,902 reviews
Vueling
7.2
Good
1,273 reviews
Check prices

Boarding

7.2

Crew

7.7

Food

6.2

Comfort

6.8

Entertainment

5.9

Overall

7.2

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
8,004 reviews
Vueling
7.2
Good
1,273 reviews
Check prices

Boarding

7.2

Crew

7.7

Food

6.2

Comfort

6.8

Entertainment

5.9

Overall

7.2

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
7,982 reviews
Vueling
7.2
Good
1,273 reviews
Check prices

Boarding

7.2

Crew

7.7

Food

6.2

Comfort

6.8

Entertainment

5.9

Overall

7.2

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. Vueling provides one of the quickest options available for as low as £185. 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 (89%), Japan Airlines (87%) or Qatar Airways (87%) 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 £165, 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 £127 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 15 May 2026.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£28Average£108FlexibilityNo cancel feeOn-time86%
Search easyJet flights
RyanairCheapest£32Average£123FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
VuelingCheapest£66Average£170FlexibilityNo cancel feeOn-time88%
Search Vueling flights
British AirwaysCheapest£75Average£237FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£124Average£324FlexibilityNo cancel feeOn-time75%
Search KLM flights
IberiaCheapest£130Average£196FlexibilityNo cancel feeOn-time77%
Search Iberia flights
LufthansaCheapest£140Average£202FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
SWISSCheapest£154Average£220FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Air FranceCheapest£160Average£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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