Flights operate between Washington (IAD) and SeaTac (SEA).
1 airline operates this route with 3-4 flights daily flights.
Average flight time is 5h 35m - 6h 04m.
Route distance is 2313 miles (3722 km).
Route Distance
2313 miles (3722 km)
Average Duration
5h 35m - 6h 04m
Airlines Operating This Route
Delta Air Lines
Flight Frequency
Daily Flights
3-4 flights
Weekly Flights
35
Typical Departure Time Ranges
Earliest Departure
07:15
Latest Departure
07:15
Route Intelligence Dashboard
Overall Connectivity Score
35
ModerateRoute Diversity
1
Direct Routes
Delta Air Lines serves 1 destination from IAD
Weekly Frequency
7
Weekly Flights
Trend: Stable
Top 1 Most Frequent Routes - Details
| Route | Weekly Flights | Duration | Distance | Reliability |
|---|---|---|---|---|
| IAD → SeaTac (SEA) (SEA) | 7/week | 5h 35m - 6h 04m | 2,313 km | Seasonal |
Flight Schedule & Filters
Delta Air Lines flights from Washington (IAD) to SeaTac (SEA)
Delta Air Lines operates scheduled nonstop flights between Washington (IAD) and SeaTac (SEA). Delta Air Lines operates 3-4 flights daily flights on this route.• Flight Duration: 5h 35m - 6h 04m (average flight time)• Distance: 2313 miles (3722 km) (air miles between airports)• Daily Flights: 3-4 flights (scheduled departures per day)
Washington (IAD)
US
SeaTac (SEA)
US
FLIGHT TIME
5h 35m - 6h 04m
FLIGHT DISTANCE
2313 miles (3722 km)
6h 4m - 6h 4m
07:15
07:15
2313 miles (3722 km)
January
1 (Show)
35
Delta Air Lines Terminal Information & Contact
Departure Terminal - Washington (IAD)
Terminal: 1
Phone: 1-800-123-6645
Location: 1, Washington, US
Arrival Terminal - SeaTac (SEA)
Terminal: 1
Phone: 1-800-123-6645
Location: 1, Seattle, US
Delta Air Lines Flight Schedule from Washington (IAD) to SeaTac (SEA)
| Flight | Airline | Departure | Arrival | Aircraft |
|---|---|---|---|---|
DL1015 |  Delta Air Lines | 07:15 | 10:19:00 | Airbus A220-300 |
Delta Air Lines Monthly Flight Calendar
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Delta Air Lines Terminal Information
Departure Terminal at Washington (IAD):
• Terminal : Delta Air Lines operates from this terminal
Terminal 1:
• Delta Air Lines Terminal Phone: 1-800-123-6645
Arrival Terminal at SeaTac (SEA):
• Terminal : Delta Air Lines operates from this terminal
Terminal 1:
• 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 Washington (IAD) to Seattle (SEA)?
Delta Air Lines operates 1 flight from Washington (IAD) to Seattle (SEA).
What city does Seattle (SEA) airport serve?
Seattle (SEA) airport serves SeaTac, US.
How long is the Delta Air Lines flight from Washington (IAD) to Seattle (SEA)?
The flight duration is approximately 5h 35m - 6h 04m.
What is the distance from Washington (IAD) to Seattle (SEA)?
The distance is 2313 miles (3722 km).
What aircraft does Delta Air Lines use on this route?
Delta Air Lines uses Airbus A220-300 on this route.
Which other airlines operate on this route?
2 other airlines operate on this route: Alaska Airlines, United Airlines.
Which terminal does Delta Air Lines use at Washington (IAD)?
Delta Air Lines flights from Washington (IAD) depart from Terminal 1. Terminal 1 phone: 1-800-123-6645.
View all Delta Air Lines flights to Washington (IAD) →
Popular Delta Air Lines routes from Washington include multiple destinations.
Route data verified regularly by Triposia Travel Research Team.