Need help booking?
Unpublished phone-only deals available
BTM to SAY: distance & flight time
Butte (Bert Mooney Airport) → Siena (Siena-Ampugnano Airport)
5,376 mi
8,651 km · 4,671 nm
11h
estimated nonstop flight time
+8h
time difference · heading northeast
See live BTM→SAY fares Phone-only fares on this route — call free
Flight time details
5,376 miles nonstop takes roughly 11h gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-hour time gain when reading arrival times on your ticket.
The two airports
- BTM — Bert Mooney Airport · Butte, United States
- SAY — Siena-Ampugnano Airport · Siena, Italy
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near BTM
- HLN · Helena Regional Airport51 mi away
- BZN · Gallatin Field66 mi away
- SMN · Lemhi County Airport88 mi away
- LVM · Mission Field100 mi away
Near SAY
- GRS · Grosseto Air Base36 mi away
- FLR · Peretola Airport38 mi away
- PSA · Pisa International Airport52 mi away
- EBA · Marina Di Campo Airport62 mi away
Frequently asked questions
How far is BTM from SAY?
The flight distance from Butte (BTM) to Siena (SAY) is 5,376 miles (8,651 km, 4,671 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BTM to SAY?
A nonstop flight takes about 11h gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Butte and Siena?
Siena is 8 hours ahead of Butte.
What is the cheapest way to fly from BTM to SAY?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BTM–SAY that never appear on search engines, with no booking fees.