Flights operate between Seattle (SEA) and London (LHR).
1 airline operates this route with 2-4 flights daily flights.
Average flight time is 9h 15m - 10h 50m.
Route distance is 4812 miles (7743 km).
Route Distance
4812 miles (7743 km)
Average Duration
9h 15m - 10h 50m
Airlines Operating This Route
Delta Air Lines
Flight Frequency
Daily Flights
2-4 flights
Weekly Flights
21
Typical Departure Time Ranges
Earliest Departure
16:48
Latest Departure
16:48
Route Intelligence Dashboard
Overall Connectivity Score
35
ModerateRoute Diversity
1
Direct Routes
Delta Air Lines serves 1 destination from SEA
Weekly Frequency
7
Weekly Flights
Trend: Stable
Top 1 Most Frequent Routes - Details
| Route | Weekly Flights | Duration | Distance | Reliability |
|---|---|---|---|---|
| SEA → London (LHR) (LHR) | 7/week | 9h 15m - 10h 50m | 4,812 km | Seasonal |
Flight Schedule & Filters
Delta Air Lines flights from SeaTac (SEA) to London (LHR)
Delta Air Lines operates scheduled nonstop flights between SeaTac (SEA) and London (LHR). Delta Air Lines operates 2-4 flights daily flights on this route.• Flight Duration: 9h 15m - 10h 50m (average flight time)• Distance: 4812 miles (7743 km) (air miles between airports)• Daily Flights: 2-4 flights (scheduled departures per day)
SeaTac (SEA)
US
London (LHR)
GB
FLIGHT TIME
9h 15m - 10h 50m
FLIGHT DISTANCE
4812 miles (7743 km)
9h 42m - 9h 42m
16:48
16:48
4812 miles (7743 km)
March
1 (Show)
21
Delta Air Lines Terminal Information & Contact
Departure Terminal - SeaTac (SEA)
Terminal: 1
Phone: 1-800-123-6645
Location: 1, Seattle, US
Arrival Terminal - London (LHR)
Terminal: 4
Phone: 1-800-123-6645
Location: 4, London, GB
Delta Air Lines Flight Schedule from SeaTac (SEA) to London (LHR)
| Flight | Airline | Departure | Arrival | Aircraft |
|---|---|---|---|---|
DL20 |  Delta Air Lines | 16:48 | 10:30:00 | Airbus A330-200 |
Delta Air Lines Monthly Flight Calendar
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Delta Air Lines Terminal Information
Departure Terminal at SeaTac (SEA):
• Terminal : Delta Air Lines operates from this terminal
Terminal 1:
• Delta Air Lines Terminal Phone: 1-800-123-6645
Arrival Terminal at London (LHR):
Terminal 4:
• Delta Air Lines Terminal Phone: 1-800-123-6645
Delta Air Lines Contact Information and Customer Services
Delta Air Lines Address
1030 Delta Boulevard
Atlanta, Georgia 30354-1989, United States
Customer Service Phone
+1 800 221 12 12Official Website
delta.comFrequently Asked Questions
How many Delta Air Lines flights operate from Seattle (SEA) to London (LHR)?
Delta Air Lines operates 1 flight from Seattle (SEA) to London (LHR).
What city does London (LHR) airport serve?
London (LHR) airport serves London, GB.
How long is the Delta Air Lines flight from Seattle (SEA) to London (LHR)?
The flight duration is approximately 9h 15m - 10h 50m.
What is the distance from Seattle (SEA) to London (LHR)?
The distance is 4812 miles (7743 km).
What aircraft does Delta Air Lines use on this route?
Delta Air Lines uses Airbus A330-200 on this route.
Which other airlines operate on this route?
2 other airlines operate on this route: British Airways, Virgin Atlantic.
Which terminal does Delta Air Lines use at Seattle (SEA)?
Delta Air Lines flights from Seattle (SEA) depart from Terminal 1. Terminal 1 phone: 1-800-123-6645.
View all Delta Air Lines flights to Seattle (SEA) →
Popular Delta Air Lines routes from Seattle include multiple destinations.
Route data verified regularly by Triposia Travel Research Team.