Direct (nonstop) flights from Helena to Seattle
1 airline flys nonstop from Helena Rgnl (HLN) to Seattle Tacoma International (SEA). It's 490 miles (788 km), about 1h 47m in the air. Operated by Alaska Airlines.
Alaska Airlines
Route data last updated: May 30, 2026
Airlines with non-stop flights
AS
Alaska Airlines
Alternative Routes
Other ways to fly from Helena to Seattle with one stop · direct emits 91 kg CO₂ per passenger
Looking for the return flight?
SEA → HLN: Flights from Seattle to HelenaOther direct flights from Helena
Direct flights from Seattle (SEA)
Frequently Asked Questions
How long is the direct flight from Helena to Seattle?
A nonstop flight from Helena (HLN) to Seattle (SEA) takes approximately 1 hours and 47 minutes. The distance is 490 miles (788 km).
Which airlines fly nonstop from Helena to Seattle?
Just Alaska Airlines.
Is there a nonstop flight from Helena to Seattle?
Yes. 1 airline: Alaska Airlines.
How far is Helena from Seattle?
The flight distance from Helena to Seattle 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 Helena to Seattle?
At 1h 47m, this route typically uses narrow-body aircraft — Boeing 737 or Airbus A320. Varies by airline.
What is the carbon footprint of a flight from Helena to Seattle?
Roughly 91 kg CO2 per passenger one-way. That's about the same as driving 455 km.
Is the return flight from Seattle to Helena 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 Helena to Seattle?
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 Helena Rgnl for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.