Direct (nonstop) flights from Seattle to Boston
3 airlines fly nonstop from Seattle Tacoma International (SEA) to Boston Logan International Airport (BOS). It's 2,494 miles (4,014 km), about 5h 28m in the air. Operated by Alaska Airlines, JetBlue Airways, Delta Air Lines.
Alaska Airlines
JetBlue Airways
Delta Air Lines
Route data last updated: May 28, 2026
Airlines with non-stop flights
AS
Alaska Airlines
B6
JetBlue Airways
DL
Delta Air Lines
Alternative Routes
Other ways to fly from Seattle to Boston with one stop · direct emits 381 kg CO₂ per passenger
Looking for the return flight?
BOS → SEA: Flights from Boston to SeattleOther direct flights from Seattle
Direct flights from Boston (BOS)
Frequently Asked Questions
How long is the direct flight from Seattle to Boston?
A nonstop flight from Seattle (SEA) to Boston (BOS) takes approximately 5 hours and 28 minutes. The distance is 2,494 miles (4,014 km).
Which airlines fly nonstop from Seattle to Boston?
3 airlines: Alaska Airlines, JetBlue Airways, Delta Air Lines.
Is there a nonstop flight from Seattle to Boston?
Yes. 3 airlines: Alaska Airlines, JetBlue Airways, Delta Air Lines.
How far is Seattle from Boston?
The flight distance from Seattle to Boston is 2,494 miles (4,014 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as New York to Los Angeles.
What type of aircraft flies from Seattle to Boston?
At 5h 28m, this route typically uses narrow-body or mid-range jets — Boeing 737 MAX or Airbus A320neo. Varies by airline.
What is the carbon footprint of a flight from Seattle to Boston?
Roughly 381 kg CO2 per passenger one-way. That's about the same as driving 1,905 km.
Is the return flight from Boston 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 Boston?
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.