# Distance between Seattle, WA (SEA) and Washington D.C. (IAD)

Flight distance from Seattle to Washington D.C. (Seattle–Tacoma International Airport – Washington Dulles International Airport) is 2306 miles / 3711 kilometers / 2004 nautical miles. Estimated flight time is 4 hours 51 minutes.

Driving distance from Seattle (SEA) to Washington D.C. (IAD) is 2795 miles / 4498 kilometers and travel time by car is about 46 hours 20 minutes.

## Map of flight path and driving directions from Seattle to Washington D.C..

Shortest flight path between Seattle–Tacoma International Airport (SEA) and Washington Dulles International Airport (IAD).

## How far is Washington D.C. from Seattle?

There are several ways to calculate distances between Seattle and Washington D.C.. Here are two common methods:

Vincenty's formula (applied above)
• 2305.730 miles
• 3710.713 kilometers
• 2003.625 nautical miles

Vincenty's formula calculates the distance between latitude/longitude points on the earth’s surface, using an ellipsoidal model of the earth.

Haversine formula
• 2300.088 miles
• 3701.633 kilometers
• 1998.722 nautical miles

The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance – the shortest distance between two points).

## Airport information

A Seattle–Tacoma International Airport
City: Seattle, WA
Country: United States
IATA Code: SEA
ICAO Code: KSEA
Coordinates: 47°26′56″N, 122°18′32″W

B Washington Dulles International Airport
City: Washington D.C.
Country: United States
Coordinates: 38°56′40″N, 77°27′20″W

## Time difference and current local times

The time difference between Seattle and Washington D.C. is 3 hours. Washington D.C. is 3 hours ahead of Seattle.

PDT

EDT

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 253 kg (557 pounds).

## Frequent Flyer Miles Calculator

Seattle (SEA) → Washington D.C. (IAD).

Distance:
2306
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
2306

Round trip?