£61 Find Cheap Flights from London to Siena

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to Siena departing on 26/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return fare
£83
Overall average: £119
Vueling
Thu 5/2Thu 12/2
LGW - FLR • Direct
Cheapest one-way flight
£61
Multiple Airlines
Sun 26/4
LTN - FLR • 1 stop
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Flight Deals
Useful Info
Flight Deals

Cheap Flights from London to Siena (LON-FLR)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from London to Siena that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from London to Siena

Thu, 5 Feb - Thu, 12 Feb
Vueling Logo
19:55 - 23:05
LGW
-
FLR
2h 10mdirect
Vueling Logo
18:00 - 19:15
FLR
-
LGW
2h 15mdirect
£83Vueling
Tue, 31 Mar - Wed, 8 Apr
Vueling Logo
08:30 - 11:50
LGW
-
FLR
2h 20mdirect
Vueling Logo
06:25 - 07:50
FLR
-
LGW
2h 25mdirect
£85Vueling
Fri, 6 Feb - Sun, 8 Feb
Vueling Logo
19:55 - 23:05
LGW
-
FLR
2h 10mdirect
Vueling Logo
13:15 - 14:35
FLR
-
LGW
2h 20mdirect
£85Vueling
Tue, 24 Mar - Mon, 27 Apr
Vueling Logo
14:55 - 18:05
LGW
-
FLR
2h 10mdirect
Vueling Logo
06:55 - 08:20
FLR
-
LGW
2h 25mdirect
£86Vueling
Tue, 24 Feb - Wed, 25 Feb
Multiple Airlines Logo
14:30 - 22:40
LGW
-
FLR
7h 10m1 stop
Multiple Airlines Logo
18:00 - 19:15
FLR
-
LGW
2h 15mdirect
£87Multiple Airlines
Wed, 25 Feb - Mon, 2 Mar
Multiple Airlines Logo
11:00 - 18:00
LGW
-
FLR
6h 00m1 stop
Multiple Airlines Logo
07:50 - 09:10
FLR
-
LGW
2h 20mdirect
£89Multiple Airlines
Sat, 25 Apr - Sun, 3 May
ITA Airways Logo
10:30 - 22:40
LHR
-
FLR
11h 10m1 stop
ITA Airways Logo
19:00 - 09:40
FLR
-
LHR
15h 40m1 stop
£112ITA Airways
Sat, 16 May - Mon, 25 May
ITA Airways Logo
10:30 - 18:15
LHR
-
FLR
6h 45m1 stop
ITA Airways Logo
15:30 - 09:40
FLR
-
LHR
19h 10m1 stop
£113ITA Airways
Sat, 4 Apr - Fri, 17 Apr
British Airways Logo
19:05 - 22:20
LHR
-
FLR
2h 15mdirect
British Airways Logo
07:05 - 08:30
FLR
-
LHR
2h 25mdirect
£125British Airways
Mon, 2 Mar - Wed, 4 Mar
British Airways Logo
09:55 - 13:00
LCY
-
FLR
2h 05mdirect
British Airways Logo
15:20 - 16:30
FLR
-
LCY
2h 10mdirect
£133British Airways
Useful Info

Good to know - Cheap tickets from London to Siena

Low seasonJanuary
Cheapest flight£61
Best time to beat the crowds (31% less expensive on average)
Most popular time to fly (13% more expensive on average)
Flight from London Luton Airport to Florence

When to book flights from London to Siena

Are your dates flexible? Find out the best times to travel from London to Siena based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

FAQs for booking flights from London to Siena

  • Which airports will I be using when flying from London to Siena?

    When flying out of London you’ll be using one of these airports: London City, London Gatwick, London Heathrow, London Luton or London Stansted. Siena does not have its own airport so you’ll be flying into nearby Florence Peretola airport, which is 34.5 mi away.

  • How long does a flight from London to Siena take?

    Direct flights cover the 746 miles separating London and Siena in about 2h 05m.

  • How many flights are there between London and Siena?

    9 direct flights run between London and Siena on a daily basis. On average, there are about 67 departures each week.

  • What’s the cheapest day of the week to fly between London and Siena?

    Consider leaving on a Sunday and avoid Thursdays if you're looking for the best rates. For your return to London, you’ll find the best rates on Tuesdays and the most expensive ones on Saturdays.

  • How does KAYAK find such low prices on flights from London to Siena?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to Siena.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Siena?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Siena from London is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London to Siena?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Siena with an airline and back to London with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Siena?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Siena from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines provide the cheapest flights from London to Siena?

    In the last 72 hours, the cheapest one-way ticket between London and Siena found on KAYAK was with Vueling for £36. Vueling offered a return connection from £66 and Ryanair from £70.

Top tips for finding cheap flights from London to Siena

  • There is no airport in Siena. Instead, you’ll be flying into Florence Peretola Airport when flying between London and Siena.
  • The cheapest flight from London to Siena was found 72 days before departure, on average.
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be June, July and August. The cheapest month to fly is January.

Top 5 airlines flying from London to Siena

 
Need help choosing which airline to fly with from London to Siena? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
VuelingOverall score based on 1222 reviews
5.9Entertainment
7.1Boarding
6.8Comfort
6.2Food
7.7Crew
Airline reviews

All very smooth airside. Check-in counters were understaffed. The wait is too long. Only two, then three counters were open. Waiting time of 35 minutes is too long. Pls review your rota.

8.0 ExcellentDan, Jan 2026
SVQ - LGW
Read more Vueling reviews

All very smooth airside. Check-in counters were understaffed. The wait is too long. Only two, then three counters were open. Waiting time of 35 minutes is too long. Pls review your rota.

To complex. So many types of fare. This made the boarding a caos.

Needs faster boarding procedure. Not their fault but should still take into account indifferent flyers.

Very fast boarding. Crew members were super nice. I loved it!

My luggage got lost and until today there is no solution to the problem. It's still missing

I am writing to demand an immediate refund and compensation for the absolutely unacceptable experience I endured with VUELING this week. On Monday, my flight was canceled, and despite this, I have yet to receive any refund. I was then taken to a hotel in a terrible location, where no food or even water was provided. The next day, I was rebooked on another flight, for which I had to personally cover an additional €50 in transportation costs—only to have that flight canceled as well. After waiting 10 hours, only 10 of us were offered alternative accommodations, while the rest were left stranded. We were forced to remain in this situation until Thursday without a single explanation or proper assistance. During this entire ordeal, we were only provided with breakfast and dinner, while being charged extra for drinks. This level of treatment is completely unacceptable. I expect an immediate refund for the cancelled flights and full compensation for the inconvenience, additional expenses, and the significant distress caused.

Only food for sale. Did not even offer water. No entertainment

Checking was efficient and quick. Adequate luggage space. Food for purchase only at high prices

Nothing. There was no flight. They cancelled the flight with no replacement about 9 hours before takeoff.

The flight was canceled at the last minute. Alternative flight was booked after 6 hours wait in Malaga airport.

Great flight just took some time to board even when lining up early for the flight, even taking off took longer then expected.

The plane had only a few passengers, we got lucky. The crew was visibly inexperienced

Buy-on-board through the app is a great feature!

I had heard horror stories about Ryan air and was a little worried about my flights with them but I had 3 flights with them in Italy, Puglia and Sicily and it was a painless and smooth process. I was very happy.

Ryan air flight was good. Nothing to complain about. I had heard absolute horror stories about Ryan air so was worried about the flight but everything went smoothly. We have had two Ryan air flights with no problems. Last flight is Vernon come. Palermo to Milan. Fingers crossed.

Flight was delayed by 1 hour 45 minutes. Aircraft was cramped, dirty and uncomfortable. Boarding staff more interested in charging you for oversize baggage than getting you on board. Overall not a pleasant experience.

From boarding to disembarking, the whole operation was very efficient.

What we can expect? Soon we will have to travel standing on the hallway. Let me be fair, I had worse experiences with Ryanair.

A delay of almost 3 hours. It was evident that the staff wanted us to board urgently, to the point of rudeness, to avoid paying compensation

It's not the staff's fault. The cabin crew do their best but the setup in Stansted Airport by Ryanair is poor. The herding of people like cattle is unacceptable before boarding and is something that's in every airport but only in Stansted have I seen the queueing of passengers outside the plane on the tarmac and the crew only turning up with maybe 5 minutes to depart. This is a resource issue . Yes prices are good but seemingly comes with a price of poor treatment of customers. I'll pay more next time

Queuing for quite a while despite using the "speedy boarding".

Would not advise EasyJet for a 5 hour flight…small plane and hence a lot of turbulence. No inflight entertainment so struggle to pass time in cramped seats. We also fell victim to extra charge for our cabin bags, although bag dimensions were ok, but the handle was rigid and slightly fell outside their testing cage!!….never again will we fly with this airline and be party to their scams for making money!

The food and so are to expensive and old . Crew whas not very friendly . Apparently some other passenger can just Push through the waiting people to board while almost punching me and a father with a child down the stairs. Its always something with easy jet . The seats of row 26 where lose . And for a guy of my size there is absolutely no leg room at all .

Nice to fly out of Orly smaller easier to navigate airport. Being able to receive boarding pass well in advance of trip was comforting to know all travel was in order.

Liked. The check-in was pretty quick as they had 5 desks working.

Generally a good experience except for boarding in Naples on the flight back to London. We were all standing around for at least 20 minutes maybe longer as there was no seating.

Seats, WC,sizes for today's generation adults, and if technical problems arise a complimentary coffee, water nice for waiting one hours, the rest is perfect (pilot and cabin crew)

Boarding was smooth and quick. Flight departed on time. Equally evacuation upon landing was from both the front door and the back doors. Bags were on the conveyor belts before I got there. Excellent service.

First -the flight was late - more than two hours Second, not even a bottle of water at bord to give for free for this inconvenience. Three-at landing ive realised that I've lost one of my ear plug headphones and been very desperate to find it with my torch, the crew not helped at all more than that they asked to leave the plane as everyone did before me. This was the last flight from that day- extra 5 min for me with a bit of help from crew - would have bring a super review. I guess this days humanity disappeared!

I got caught using a stolen credit card number. Michelle Siziba is my name Nice to London Gatwick on 7/31/25.

Paid for exit row at the back of the plane. Window seat with lots of leg space. Food was inedible (as usual). Brought my own.

Efficiency of staff, and comfort and cleanliness of aircraft was all great. Maybe a hot drink without payment at that time in the morning would be good!

The plane was late (as was my flight out from Birmingham the day before)

Boarding and flight update was fantastic as I experienced about a 10-15 delayed for both flights. The food served onboard was great; the service of the flight attendants was excellent.

The flight was delayed by an hour. Made the connection uncomfortably tight.

Complete mess. Our reservation was mistakenly cancelled. After almost missing the connection and walking all over the Munich airport, the Service desk got involved and we were run to our flight. Not all 4 of us in Business and not seated together as originally booked. This was the worst treatment I have ever had. And I travel a lot. 1K million miler.

The flight attendants were rude in the DEL to FRA flight. The transfer between the two flights at Frankfurt International Airport was an unpleasant experience. The airplane was never parked at the terminal, but was deboarded instead on the tarmac itself. For those passengers in need of a wheelchair, it was a nightmare to come down the stairs and then rush across the airport to catch the connecting flight from FRA to IAH. Upon arriving at IAH, it was informed that the luggage had not arrived. Would make it a point never to travel with Lufthansa again.

When we went to the lounge they told us to go into the main lounge and not the full business class section, later they told me that Lufthansa wont pay the full fee to alloq the business class passengers entry to the nicer sectikn where all the other airlines nusiness class passengers go into. Very poor arrangement.

Not what I expected for the last leg of a $5100 business class experience. Boarding was a nightmare. The flight was delayed and I had to keep checking my email to ensure I was at the right gate since the airline or the terminal had no clue until 15 mins prior to boarding. Food was gross, limited drink options.

Flights scheduled with impossible connections - Lufthansa apparently believes it takes 7mins to change terminals, go through passport control, re-clear security and walk 1.8kms…..and everything will work perfectly (which it never does at Frankfurt). No staff on hand to assist with transfers on delayed flights. No transfer guidance provided by app. No compensation offered for 6hr delay to connecting flight.

Check-in experience, for business call please provide a premium experience

Lost my luggage, ran out of food choices in business class, ground crew was completely unapologetic.

Excellent. The crew and flight were great. Checking in was easy and everyone was very helpful.

Late. And service was very slow - passengers sat for well over an hour with dirty trays etc surrounding them

Entertainment devices on A380 need to be fixed, the seats might do with updates.

I like everything about British Airways. Excellence. Perfect. Exquisite service.

The plane was dirty the food was awful and the boarding process took too long

Everything. Employees offered to help me because I had to use a cane.

Check-in and boarding were great. On flight staff were rude and disrespectful. Paid for extra room and found it incredibly cramped. Bathrooms kept in poor condition. Overall negative experience.

The business class seating arrangement for LHR to MAA was very uncomfortable. The movie options were terrible.

Everything you need to know for your flight from London to Siena

Complete your trip to Siena with a hotel stay or car hire