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HDN to SAY: distance & flight time
Hayden (Yampa Valley Airport) → Siena (Siena-Ampugnano Airport)
5,499 mi
8,849 km · 4,778 nm
11h 15m
estimated nonstop flight time
+8h
time difference · heading northeast
See live HDN→SAY fares Phone-only fares on this route — call free
Flight time details
5,499 miles nonstop takes roughly 11h 15m 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
- HDN — Yampa Valley Airport · Hayden, 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 HDN
- SBS · Steamboat Springs Bob Adams Field19 mi away
- EGE · Eagle County Regional Airport60 mi away
- SAA · Shively Field70 mi away
- RIL · Garfield County Regional Airport71 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 HDN from SAY?
The flight distance from Hayden (HDN) to Siena (SAY) is 5,499 miles (8,849 km, 4,778 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from HDN to SAY?
A nonstop flight takes about 11h 15m 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 Hayden and Siena?
Siena is 8 hours ahead of Hayden.
What is the cheapest way to fly from HDN to SAY?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on HDN–SAY that never appear on search engines, with no booking fees.