£64 Find Cheap Flights from London to Siena – Compare and Save

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 19/9. 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
£114
Multiple Airlines
Thu 3/9Mon 7/9
LTN - FLR • 1 stop
Cheapest direct flights
£114
Typical prices: £114-£218
Vueling
Sun 18/10Wed 21/10
LGW - FLR • Direct
Arrival airport
You can’t fly directly to Siena. It is served by Florence (FLR), located 34.5 miles from Siena.
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Flight Deals
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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, 3 Sep - Mon, 7 Sep
Multiple Airlines Logo
12:45 - 21:20
LTN
-
FLR
7h 35m
1 stop
Multiple Airlines Logo
14:40 - 17:20
FLR
-
LTN
27h 40m
1 stop
£114Multiple Airlines
Sun, 18 Oct - Wed, 21 Oct
Vueling Logo
19:50 - 23:05
LGW
-
FLR
2h 15mdirect
Vueling Logo
06:25 - 07:50
FLR
-
LGW
2h 25mdirect
£114Vueling
Sat, 7 Nov - Sun, 15 Nov
Vueling Logo
14:50 - 18:05
LGW
-
FLR
2h 15mdirect
Vueling Logo
08:00 - 12:20
FLR
-
LGW
5h 20m
1 stop
£114Vueling
Mon, 28 Sep - Fri, 2 Oct
Vueling Logo
21:05 - 08:25
LGW
-
FLR
10h 20m
1 stop
Vueling Logo
06:55 - 08:20
FLR
-
LGW
2h 25mdirect
£115Vueling
Sat, 24 Oct - Mon, 2 Nov
Vueling Logo
19:50 - 23:05
LGW
-
FLR
2h 15mdirect
Vueling Logo
07:50 - 09:10
FLR
-
LGW
2h 20mdirect
£116Vueling
Thu, 3 Sep - Mon, 7 Sep
Multiple Airlines Logo
12:45 - 21:20
LTN
-
FLR
7h 35m
1 stop
Multiple Airlines Logo
14:40 - 17:20
FLR
-
LTN
27h 40m
1 stop
£117Multiple Airlines
Fri, 18 Sep - Wed, 23 Sep
ITA Airways Logo
16:30 - 22:40
LHR
-
FLR
5h 10m
1 stop
ITA Airways Logo
11:25 - 15:40
FLR
-
LHR
5h 15m
1 stop
£122ITA Airways
Sat, 3 Oct - Wed, 28 Oct
ITA Airways Logo
16:30 - 22:40
LHR
-
FLR
5h 10m
1 stop
ITA Airways Logo
11:25 - 15:40
FLR
-
LHR
5h 15m
1 stop
£129ITA Airways
Sun, 22 Nov - Thu, 26 Nov
British Airways Logo
16:15 - 19:20
LCY
-
FLR
2h 05mdirect
British Airways Logo
13:40 - 14:50
FLR
-
LCY
2h 10mdirect
£156British Airways
Sun, 22 Nov - Thu, 26 Nov
British Airways Logo
16:15 - 19:20
LCY
-
FLR
2h 05mdirect
British Airways Logo
13:40 - 14:50
FLR
-
LCY
2h 10mdirect
£164British Airways
Useful Info

Good to know - Cheap tickets from London to Siena

Low season

January

Cheapest flight

£64
Best time to beat the crowds (25% less expensive on average)
Most popular time to fly (14% more expensive on average)
Flight from London Stansted 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?

    16 direct flights run between London and Siena on a daily basis. On average, there are about 116 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 Fridays and the most expensive ones on Tuesdays.

  • 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 5 days, the cheapest one-way ticket between London and Siena found on KAYAK was with Vueling for £34. easyJet offered a return connection for £28 and Vueling for £66.

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 89 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 April, May and June. 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.
7.2
VuelingOverall score based on 1289 reviews
6.9Comfort
7.7Crew
5.9Entertainment
7.2Boarding
6.2Food
Airline reviews

Almost as usual, half an hour take off dilay, on the other hand - the checked in baggage arrived as magic super quickly. By the way - why do you ask to rate the food and entertainment on flights without them? at least offer the option of "Not Relevant" or similar...

6.0 GoodNathan, May 2026
IBZ - BCN
Read more Vueling reviews

Almost as usual, half an hour take off dilay, on the other hand - the checked in baggage arrived as magic super quickly. By the way - why do you ask to rate the food and entertainment on flights without them? at least offer the option of "Not Relevant" or similar...

Good standard flight the plan was clean could not complain the only thing is checking in the pushchair was very slow only 3 people at the counter.

The flight was delayed and nobody was able to inform me about the new scheduled time and gate

Non stop flight from Barcelona to Rome, arriving on time.

Boarding was very poor as the flight was initially delayed. We were told the flight would be at 21:40. We were with our 10 month baby who was sleeping. I received an email from Kayak which said the flight was now due to take off at 21:04. When we checked the screens at Gatwick we were told the gate was closed. The lack of communication was extremely poor and we had to run with our baby and there were many other passengers, including elderly people, also running to the gate. When we got to the gate, the staff had no reasons for the poor communication.

We got to the airport 2 hours before the flight. We waited in a line to check our bags onto the flight for an hour, even despite having checked in online, as there weren't enough self check terminals allocated to Vueling (yet loads of empty BA ones right next to them). There also weren't enough staff, making them stressed and rude. We had to try and rush through security to get to our gate, which they announced as gate 35 at first and then changed it after ten minutes with no announcement to anyone in the airport that it had changed. So we then had to rush to the correct gate to arrive just as boarding started. It was a thoroughly stressful process and one travelling couple almost missed boarding because of it. The flight boarding and the flight itself werre fine, the staff were polite, but I was dehydrated due to the airport and had to buy a bottle of water as they didn't offer free drinks.

You have couple of KG's grace on checked luggage

Nous sommes parties de Copenhague avec plus de 2h de retard. L'avion n'a pas pu atterrir à Paris et après avoir encore perdu du temps en vol, a atterri à Bruxelles. Une navette devait nous prendre en charge pour nous ramener à Paris mais personne ne nous a renseignés, on a tourné en rond dans l'aéroport durant plus de 2h, sans trouver de solution pour rentrer (pas de train, pas de voiture de location...). Nous avons fini par monter dans un car affrété par une autre compagnie et qui nous a déposés à CDG. Ensuite il fallu prendre un Uber (il était plus de 2h du matin) pour rentrer, qui a couté presque 90 €. Donc non, je ne suis pas satisfaite des services de la compagnie Vueling.

I liked the regular updates and appreciated the automatic online checkin which didn’t work for our Vueling flight so I had to do this myself.

We were very lucky and got a complementary upgrade somehow because the crew needed our seats.

Boarding was a mad rush as people still had issues with boarding passes and groups 3- 7 were asked to board when travelers were still stuck behind the document check. Food was one of the worst I’ve ever had in an Economy flight. The crew was very friendly though

We were delayed 2 hours because the crew was late. They need better planning by the crew, we had to sit in uncomfortable seats waiting for them.

Difficulty to check in online, but well handled at the airport. Flight delay was unfortunate. Crew was adequate but not what we have usually experienced from BA. Seat was not comfortable.

Charging $300 to be able to pick a seat next to your wife was nothing less than extortion.

I’m very mad because I paid an extra $105 to change seats to an exit row with more leg room. The app clearly showed a gap in between the seats in the row I changed my seat to and I paid for it. When I boarded the plane, it wasn’t an exit row seat and no more room than my original seat. I feel like I was ripped off $105.

I had a great experience , crew was great and enjoyed the entertainment options I will be booking my next International trip with them .

Front desk was closed at 6 pm, I was unable to get my boarding pass and as such missed my connecting flight home.

Overall a great. However, the seating is way too narrow, for guys with any shoulder width. Luckily the crew moved the guy next to me, or it would have been miserable.

The plane was not well maintained. The entertainment system didn’t work properly, eg moving map. Many of the seat controls did not work. Cabin temperature fluctuated considerably during the flight. The seat allocated was poor, it was noisy and offered no privacy. The perfume in the toilet triggered severe allergies. Crew was very goid.

I had assist travel booked in Denver to Manchester, but not listed in HeathRow, my daughter use a spare wheel chair herself for me , when going thro to board at Heathrow there was no help travel down for the ramp until a member of assistance stepped forward and insisted he would take me down the very steep ramp, seems he was the only person concerned with my safety.

There was no useful information given regarding the flight back to the UK from Tenerife. This despite the week publicised problems around the EES system and the delays caused to boarding. This aspect of the customer experience could have been much better.

Fast boarding, smooth takeoff and landing. plenty of space in seats. Excellent air-conditioning on a hot day. Perfect experience

Sitting on the last row in between the aisle and a massive person, all people going to the bathroom bumped into me including the flight attendants.

The best budget airline in Europe. Flight was on time, crew friendly and worked hard during flight and were able to meet our needs. Only downside (not the airline's fault), there were no rear steps.

It was transportation nothing more. I will give a positive rating over Ryanair. We missed our Ryanair flight the night before and received rude and unconcerned treatment from the Ryanair customer service. It was late. We were very tired and stressed after doing our best to get to the airport. The so called customer service ladies were completely unconcerned from the start. Aside from that, the flight to London seemed to be their opportunity for advertising. No time to relax as attendants were constantly in the aisle selling. I will never fly Ryanair again!!

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 .

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)

We accidentally purchased twice the bags we needed. Our fault, but the ticket was not clear to us, and it asked us to purchase bags at checkin. When we notified them to get credit back at the airport, they said to contact customer service. We flew the flight and then contracted customer service. They said no credits after the flight has flown. Not customer service oriented at all. They know we didn’t check that many bags and kept our money for a service they did not provide. Be aware and very careful of what you are purchasing from them because they will not make it right if there is an error.

As you would expect from a budget airline Left and arrived on time, no frills, not even a glass of water offered But you get what you pay for

Flight map did not work. Crew was great, food was good, plane took off on time and landed early. That's all I can ask.

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.

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

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.

Crew were friendly and very helpful Plane was clean and the legroom is standard. Overall a good flight, no complaints.

I did not like that they failed to put my luggage on my connecting flight to Athens. I was promised it would be located and delivered within 2 days but later told there was no information on its location. This caused me to have unplanned for expenses because I then had to purchase new clothing to wear on my vacation. I did not receive my luggage until my return flight home. I will not be traveling with them again.

No internet, very narrow seats insufficient room for three passengers with encroachment.

Other than problems with checking in and uploading passport info everything was great. It would be nice to be able to manually input passport info. Often while traveling the bandwidth has problems uploading pictures

Give at least coffee or juice as it is an international flight.

The crew and flight was fine and enjoyable…unfortunately, when I arrived to Bari and received my checked luggage(that I bought for this first trip to Europe), one of bags had a huge dent in it and the other had a completely damaged/broken wheel that made it very difficult to travel the rest of my time in Italy. Very disappointing and frustrating!

Poor service, antiquated plane with 2-3-2. B-class config upstairs. Tight and not comfortable—not what I expected for paying B-class! AND my bag didn’t make the transfer, bag will be delivered the day after it lands!

I was unable to board this flight because of visa changes that I was not alerted about and I’ve been unable to contact Kayak to obtain a refund / credit anything.

The space is tight. Either you sit straight up the whole time, but the minute you relax, your knees hit the back of the seat in front of you. My seat would not recline so I was quite uncomfortable. Didn’t use my tray table bc it was stained and sticky and nasty. I was also seating in one of the last rows and one crew member and people going to the bathroom kept hitting my elbow resting on the armrest.

Boarding market okay just because of the delay we had, but not related to the crew in any way…

charging port did not work, no entertainment system. Other than that the flight was good and safe.

Not the quality I was expecting from a company that has been around for ages and charges high prices

Very quick boarding. I was surprised we only got a small water and small thing of cookies, everything else was for purchase. No entertainment. Crew was excellent though.

After boarding, take off delayed 45 minutes with us just sitting there. I think this a Heathrow problem

Every part of the flight from PHL - LHR was perfect in every way!

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

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