Direct (nonstop) flights from Seattle to Helena
1 airline flys nonstop from Seattle Tacoma International (SEA) to Helena Rgnl (HLN). It's 490 miles (788 km), about 1h 36m in the air. Operated by Alaska Airlines.
Alaska Airlines
Route data last updated: May 26, 2026
Airlines with non-stop flights
AS
Alaska Airlines
Alternative Routes
Other ways to fly from Seattle to Helena with one stop · direct emits 91 kg CO₂ per passenger
Looking for the return flight?
HLN → SEA: Flights from Helena to SeattleOther direct flights from Seattle
Direct flights from Helena (HLN)
Frequently Asked Questions
How long is the direct flight from Seattle to Helena?
A nonstop flight from Seattle (SEA) to Helena (HLN) takes approximately 1 hours and 36 minutes. The distance is 490 miles (788 km).
Which airlines fly nonstop from Seattle to Helena?
Just Alaska Airlines.
Is there a nonstop flight from Seattle to Helena?
Yes. 1 airline: Alaska Airlines.
How far is Seattle from Helena?
The flight distance from Seattle to Helena is 490 miles (788 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as Mumbai to Goa.
What type of aircraft flies from Seattle to Helena?
At 1h 36m, this route typically uses narrow-body aircraft — Boeing 737 or Airbus A320. Varies by airline.
What is the carbon footprint of a flight from Seattle to Helena?
Roughly 91 kg CO2 per passenger one-way. That's about the same as driving 455 km.
Is the return flight from Helena to Seattle also nonstop?
Yes — nonstop flights run both ways. Flight time may differ slightly due to wind patterns.
When is the cheapest time to fly from Seattle to Helena?
Midweek flights (Tue/Wed) outside holiday peaks are usually cheapest. 3-6 weeks ahead is a good window for this route. Use "Check Prices" above to compare.
How early should I arrive at Seattle Tacoma International for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.