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TTD to HLN: distance & flight time
Troutdale (Portland Troutdale Airport) → Helena (Helena Regional Airport)
504 mi
812 km · 438 nm
1h 34m
estimated nonstop flight time
+1h
time difference · heading east
See live TTD→HLN fares Phone-only fares on this route — call free
Flight time details
504 miles nonstop takes roughly 1h 34m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- TTD — Portland Troutdale Airport · Troutdale, United States
- HLN — Helena Regional Airport · Helena, United States
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 TTD
- PDX · Portland International Airport10 mi away
- HIO · Portland Hillsboro Airport27 mi away
- KLS · Southwest Washington Regional Airport46 mi away
- SLE · Salem Municipal Airport/McNary Field53 mi away
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
Frequently asked questions
How far is TTD from HLN?
The flight distance from Troutdale (TTD) to Helena (HLN) is 504 miles (812 km, 438 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from TTD to HLN?
A nonstop flight takes about 1h 34m 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 Troutdale and Helena?
Helena is 1 hour ahead of Troutdale.
What is the cheapest way to fly from TTD to HLN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on TTD–HLN that never appear on search engines, with no booking fees.