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HLN to SDU: distance & flight time
Helena (Helena Regional Airport) → Rio De Janeiro (Santos Dumont Airport)
6,433 mi
10,353 km · 5,590 nm
13h 5m
estimated nonstop flight time
+3h
time difference · heading southeast
See live HLN→SDU fares Phone-only fares on this route — call free
Flight time details
6,433 miles nonstop takes roughly 13h 5m gate to gate, flying southeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time gain when reading arrival times on your ticket.
The two airports
- HLN — Helena Regional Airport · Helena, United States
- SDU — Santos Dumont Airport · Rio De Janeiro, Brazil
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 HLN
- BTM · Bert Mooney Airport51 mi away
- GTF · Great Falls International Airport67 mi away
- BZN · Gallatin Field70 mi away
- LVM · Mission Field97 mi away
Near SDU
- GIG · Rio Galeão – Tom Jobim International Airport9 mi away
- QNV · Aeroclube Airport22 mi away
- SNZ · Santa Cruz Air Force Base35 mi away
- CFB · Cabo Frio Airport69 mi away
Frequently asked questions
How far is HLN from SDU?
The flight distance from Helena (HLN) to Rio De Janeiro (SDU) is 6,433 miles (10,353 km, 5,590 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from HLN to SDU?
A nonstop flight takes about 13h 5m 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 Helena and Rio De Janeiro?
Rio De Janeiro is 3 hours ahead of Helena.
What is the cheapest way to fly from HLN to SDU?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on HLN–SDU that never appear on search engines, with no booking fees.