Direct (nonstop) flights from Seattle to London
4 airlines fly nonstop from Seattle Tacoma International (SEA) to Heathrow (LHR). It's 4,800 miles (7,725 km), about 9h 30m in the air. Operated by Alaska Airlines, British Airways, Delta Air Lines and others.
Alaska Airlines
British Airways
Delta Air Lines
Virgin Atlantic
Route data last updated: May 26, 2026
Airlines with non-stop flights
AS
Alaska Airlines
BA
British Airways
DL
Delta Air Lines
VS
Virgin Atlantic
Alternative Routes
Other ways to fly from Seattle to London with one stop · direct emits 734 kg CO₂ per passenger
Looking for the return flight?
LHR → SEA: Flights from London to SeattleOther direct flights from Seattle
Direct flights from London (LHR)
Frequently Asked Questions
How long is the direct flight from Seattle to London?
A nonstop flight from Seattle (SEA) to London (LHR) takes approximately 9 hours and 30 minutes. The distance is 4,800 miles (7,725 km).
Which airlines fly nonstop from Seattle to London?
4 airlines: Alaska Airlines, British Airways, Delta Air Lines, Virgin Atlantic.
Is there a nonstop flight from Seattle to London?
Yes. 4 airlines: Alaska Airlines, British Airways, Delta Air Lines, Virgin Atlantic.
How far is Seattle from London?
The flight distance from Seattle to London is 4,800 miles (7,725 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as New York to Rome.
What is the time difference between Seattle and London?
London is 8 hours ahead of Seattle. (America/Los_Angeles vs Europe/London.)
Will I experience jet lag flying from Seattle to London?
Probably — 8-hour time difference means significant jet lag. Expect about 1 day of adjustment per hour of shift. Flying eastward is generally harder to adjust to.
What type of aircraft flies from Seattle to London?
At 9h 30m, this route typically uses wide-body aircraft — Boeing 777, 787, or Airbus A330/A350. Varies by airline.
Do I need a visa to travel from USA to United Kingdom?
Depends on your passport. Check with the United Kingdom embassy or an official visa portal before booking — requirements change.
What is the carbon footprint of a flight from Seattle to London?
Roughly 734 kg CO2 per passenger one-way. That's about the same as driving 3,670 km.
Is the return flight from London 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 London?
Midweek flights (Tue/Wed) outside holiday peaks are usually cheapest. For long-haul, booking 2-3 months out tends to help. Use "Check Prices" above to compare.
How early should I arrive at Seattle Tacoma International for this flight?
3 hours before departure for international flights. You need time for check-in, security, and immigration.