Direct (nonstop) flights from Seattle to Boise
2 airlines fly nonstop from Seattle Tacoma International (SEA) to Boise Air Terminal (BOI). It's 398 miles (640 km), about 1h 33m in the air. Operated by Alaska Airlines, Delta Air Lines.
Alaska Airlines
Delta Air Lines
Route data last updated: May 30, 2026
Airlines with non-stop flights
AS
Alaska Airlines
DL
Delta Air Lines
Alternative Routes
Other ways to fly from Seattle to Boise with one stop · direct emits 74 kg CO₂ per passenger
Looking for the return flight?
BOI → SEA: Flights from Boise to SeattleOther direct flights from Seattle
Direct flights from Boise (BOI)
Frequently Asked Questions
How long is the direct flight from Seattle to Boise?
A nonstop flight from Seattle (SEA) to Boise (BOI) takes approximately 1 hours and 33 minutes. The distance is 398 miles (640 km).
Which airlines fly nonstop from Seattle to Boise?
2 airlines: Alaska Airlines, Delta Air Lines.
Is there a nonstop flight from Seattle to Boise?
Yes. 2 airlines: Alaska Airlines, Delta Air Lines.
How far is Seattle from Boise?
The flight distance from Seattle to Boise is 398 miles (640 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 Boise?
At 1h 33m, 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 Boise?
Roughly 74 kg CO2 per passenger one-way. That's about the same as driving 370 km.
Is the return flight from Boise 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 Boise?
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.