Cheap Flights from Brussels to Siena

Compare Brussels to Siena flight deals

Find the cheapest month or even day of the year to fly to Siena

Book the best Siena fare with no extra fees

Flight deals from Brussels to Siena

Looking for a cheap last-minute deal or the best round-trip flight from Brussels to Siena? Find the lowest prices on one-way and round-trip tickets right here.

Brussels to Siena: Flight information

The things to know before you go.
Fly intoFlorence Airport
Distance to Siena55.5 km
Cheapest flightAED 306
Cheapest month to flyJune
Most popular airlineUnited
Average flight time1 hr, 49 mins

Find the cheapest month to fly from Brussels to Siena

We’re always keeping an eye on fares, so you can find the best flight deal in seconds. It looks like Brussels to Siena flights are currently cheapest in June. We’ve based this on flights into Florence Airport.

Finding cheap flights from Brussels to Siena: Frequently asked questions

There are two (2) airports near Siena: Florence Airport and Pisa International Airport.
The best price we found for a round-trip flight from Brussels to Siena is AED 306. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
The average flight time to Siena is 1 hour and 49 minutes. We've calculated this based on journeys to Florence Airport.
United, Brussels Airlines, and Vueling Airlines all offer direct flights to Florence Airport.
We’ve found roughly 16 per week flying from Brussels to Florence Airport.
We've checked every Brussels to Siena fare we could find, and the cheapest upcoming date to fly seems to be on Tuesday, June 16, 2026. Overall, the cheapest month to fly from Brussels to Siena is usually June.
If you're flying from Brussels, the cheapest airport near Siena is Florence – which is 55.5 km away from the center of Siena. We've found flights to this airport from AED 306.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Brussels to Siena on Tuesday, June 16, 2026.
No airlines currently offer direct flights between Brussels and Siena. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Siena but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Siena is around 40 days in advance, so don’t leave your flight to the last minute.
Florence Airport is 55.5km from Siena and Pisa International Airport is 85.8km from Siena.
Florence Airport is closest to Siena, at around 55.5 km away.
In March, the average temperature is usually around 8°C. August is typically the warmest month in Siena, when it usually averages around 31°C. You can expect the least rain in July. The coldest month is January, with temperatures averaging 1°C. The rainiest month is November.
The cheapest airline that flies to Siena is Vueling Airlines.