Direct (nonstop) flights from Boise to Seattle
2 airlines fly nonstop from Boise Air Terminal (BOI) to Seattle Tacoma International (SEA). It's 398 miles (640 km), about 1h 42m in the air. Operated by Alaska Airlines, Delta Air Lines.
Alaska Airlines
Delta Air Lines
Route data last updated: May 28, 2026
Airlines with non-stop flights
AS
Alaska Airlines
DL
Delta Air Lines
Alternative Routes
Other ways to fly from Boise to Seattle with one stop · direct emits 74 kg CO₂ per passenger
Looking for the return flight?
SEA → BOI: Flights from Seattle to BoiseOther direct flights from Boise
Direct flights from Seattle (SEA)
Frequently Asked Questions
How long is the direct flight from Boise to Seattle?
A nonstop flight from Boise (BOI) to Seattle (SEA) takes approximately 1 hours and 42 minutes. The distance is 398 miles (640 km).
Which airlines fly nonstop from Boise to Seattle?
2 airlines: Alaska Airlines, Delta Air Lines.
Is there a nonstop flight from Boise to Seattle?
Yes. 2 airlines: Alaska Airlines, Delta Air Lines.
How far is Boise from Seattle?
The flight distance from Boise to Seattle 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 Boise to Seattle?
At 1h 42m, this route typically uses narrow-body aircraft — Boeing 737 or Airbus A320. Varies by airline.
What is the carbon footprint of a flight from Boise to Seattle?
Roughly 74 kg CO2 per passenger one-way. That's about the same as driving 370 km.
Is the return flight from Seattle to Boise 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 Boise 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 Boise Air Terminal for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.