£63 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 27/4. 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

KAYAK searches hundreds of travel sites at once for deals on flights from London to Siena

Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 29% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest return fare
£134
Multiple Airlines
Sun 10/5Tue 12/5
LTN - FLR • 2 stops
Cheapest direct flights
£135
Typical prices: £305-£127
Vueling
Fri 15/5Mon 18/5
LGW - FLR • Direct
Arrival airport
You can’t fly directly to Siena. It is served by Florence (FLR), located 34.5 miles from Siena.
FAQs
FAQs
FAQs
FAQs
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Siena!
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

Sun, 10 May - Tue, 12 May
Multiple Airlines Logo
21:50 - 17:05
LTN
-
FLR
18h 15m
2 stops
Multiple Airlines Logo
22:00 - 11:00
FLR
-
LTN
14h 00m
1 stop
£134Multiple Airlines
Sat, 3 Oct - Mon, 5 Oct
ITA Airways Logo
10:30 - 22:40
LHR
-
FLR
11h 10m
1 stop
ITA Airways Logo
19:00 - 09:40
FLR
-
LHR
15h 40m
1 stop
£134ITA Airways
Sun, 10 May - Sun, 17 May
Multiple Airlines Logo
19:20 - 17:05
LGW
-
FLR
20h 45m
2 stops
Multiple Airlines Logo
06:25 - 07:50
FLR
-
LGW
2h 25mdirect
£134Multiple Airlines
Tue, 5 May - Tue, 12 May
Multiple Airlines Logo
07:55 - 21:25
STN
-
FLR
12h 30m
1 stop
Multiple Airlines Logo
22:00 - 12:00
FLR
-
STN
15h 00m
1 stop
£134Multiple Airlines
Fri, 15 May - Mon, 18 May
Vueling Logo
19:55 - 23:10
LGW
-
FLR
2h 15mdirect
Vueling Logo
06:55 - 08:20
FLR
-
LGW
2h 25mdirect
£135Vueling
Tue, 5 May - Tue, 12 May
Multiple Airlines Logo
20:55 - 22:30
LTN
-
FLR
24h 35m
2 stops
Multiple Airlines Logo
22:00 - 11:00
FLR
-
LTN
14h 00m
1 stop
£135Multiple Airlines
Fri, 8 May - Fri, 15 May
Multiple Airlines Logo
22:10 - 23:15
STN
-
FLR
24h 05m
2 stops
Multiple Airlines Logo
18:45 - 20:50
FLR
-
STN
27h 05m
2 stops
£135Multiple Airlines
Thu, 10 Sep - Tue, 15 Sep
Vueling Logo
19:55 - 23:10
LGW
-
FLR
2h 15mdirect
Vueling Logo
06:25 - 07:50
FLR
-
LGW
2h 25mdirect
£137Vueling
Wed, 26 Aug - Mon, 31 Aug
KLM Logo
09:55 - 19:00
LHR
-
FLR
8h 05m
1 stop
KLM Logo
19:40 - 09:00
FLR
-
LHR
14h 20m
1 stop
£149KLM
Tue, 5 May - Tue, 12 May
KLM Logo
06:30 - 19:00
LHR
-
FLR
11h 30m
1 stop
KLM Logo
06:30 - 10:45
FLR
-
LHR
5h 15m
1 stop
£153KLM
Useful Info

Good to know - Cheap tickets from London to Siena

Low seasonJanuary
Cheapest flight£63
Best time to beat the crowds (25% less expensive on average)
Most popular time to fly (18% 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 10m.

  • How many flights are there between London and Siena?

    15 direct flights run between London and Siena on a daily basis. On average, there are about 109 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 Sundays and the most expensive ones on Mondays.

  • 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 £34. easyJet offered a return connection from £28 and Ryanair from £48.

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 55 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.
7.2
VuelingOverall score based on 1261 reviews
5.9Entertainment
6.8Comfort
7.7Crew
7.2Boarding
6.2Food
Airline reviews

Basic service for the basic price. Efficient and cost effective, so ticked all the right boxes.

10.0 ExcellentGeoff, Mar 2026
CDG - SVQ
Read more Vueling reviews

Basic service for the basic price. Efficient and cost effective, so ticked all the right boxes.

Not constantly changing the price DURING a booking. Felt like bait and switch.

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

Shady baggage policy that forces you to pay more money at the gate, even after you checked your bag dimensions during the bag drop. Will never fly again with this airline.

I didn't eat any food so can't comment on that. The prices on the plane are extortionate (as are all prices on planes). Everything else was seemless and a great experience

I need assistance and I could not fault it at all. I suffer anxiety and I was always put at ease by assistance staff, and the banter was good. On board the staff was so very nice and kind and showed empathy. Thank you to them. It was my first time travelling since I lost my husband and was so grateful to them.

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.

It was good; the only down side is that once you get to the airport everything is self service, there is no one assisting. I felt like I was working while I was on vacation during the check in process and dropping off the luggage. Really uncertain on what the airlines use payroll nowadays.

You need to make signage at Berlin Airport clearer. Having checked in online we had our boarding passes onlour phones. You do not make it clear that you need to check in again to receive a printed luggage tag. You get to baggage drop off and it says you can only do it with a luggage tag BUT not how to get this.

We were bumped despite seats existing on flight While checkin attendants were helpful Easyjet management was not. Only after threats were we allowed on plane at last minute. The online help desk was useless and waste of time (over an hour of useless chats)

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.

Sat at rear of aircraft and was very cold. As a frequent flyer for many years, this is was the coldest I have ever been. Other passengers and some crew were complaining how cold it was. Sitting near the doors always risks being colder, just the way the aircraft works - but this was exceptional, bring a good jumper. Everything else was pretty standard easyJet - good value low cost carrier.

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!!

Boarding could be better. To get through your gate but to be stood in a corridor for 20 minutes is not great.

The true is that travel from London to Faro on 11/12/2025 by BA was cancelled, so I did not go to Faro, so i did not board easy flight. The mediocre qualification to you was because even when i bought an insurance, i could not change date neither obtain reimbursement. It could be ideal if you do something in order for me not to lose the purchase Thank you

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

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.

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.

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.

The crew has always been great on BA. They are very friendly and accommodating. I like that they have vegetarian options already in the menu. And the free wine is a nice perk.) I noticed (both directions of my trip) minor upgrades/ replacements needed on the plane itself (touch screen didn't work with touch; bathroom light didn't go on). However, this is one of my favorite airlines.

It was not British Air, we were put onto Air Portugal for our London to Lisbon leg.

Everything was spectacular except the boarding. It was just a mob of people while all groups were called over the public address system.

BA code for a Vueling flight. All god but the temperature in the plane (too hot when engine not running but otherwise ok)

The Britts are wonderful to fly with and the crew were very hospitable. Again, I really wish they had been able to retrieve my carryon bag from baggage claim before the flight so I could be in a less worrisome state of mind, but that's not on them. I completely understand. The window seats with the dimmable windows were very cool!

There was a delay for the San Francisco-London flight, but we were all informed via text and email. The staff was very friendly and nice and the food was good. I do recommend that the airline offer something without eggs or something vegan for the vegetarian meal option. A lot of Indians are lacto-vegetarian, while some could be allergic to eggs/dairy.

food options were terrible. for a 10-hour flight, there should be 2 decent meals. Also, flight attendants should come around with drinks more than just at the meals.

Smooth flight. The seats were comfortable but the reclining mechanism didn't work very well. My wife's seat required the flight attendant to push the seat forward while she pushed the button. The leg support didn't want to return to its home under the seat. I ordered the diabetic meal which was full of carbs. It was low in sugar but carbs turn into sugar so was it really diabetic? Overall the flight was pleasant, long but pleasant.

Crew were nice, food was good. Boarding was horrendous. We were driven around the airport in a bus forced to climb a long flight of very steep stairs with no adequate handrails to board the plane . In many many years of flying to the US I have never been required to do this . There was no assistance for those needing help getting up the stairs to the plane. A fellow passenger helped me. No idea how other elderly, physically limited passengers or those with young children managed . It was a full flight with crowds trying to get up the stairs. It was an accident waiting to happen.

Food options limited and quality wasn’t very good. I was I was in premium economy and the people in front of me pushed their seats back to fully reclined position which made it difficult for me. My seat wouldn’t recline at all. I suggest that BA restrict the recliner more. Also, the audio in my headset didn’t work unless I held it in all the time. Entertainment choices were good. Customer services is excellent. Thank you to BA team.

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

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