IAD to SEA Route Guide
Washington D.C., United States → Seattle, United States
Quick answer
KIAD (Washington D.C., United States) to KSEA (Seattle, United States) is a 1,998 NM (3,700 km / 2,299 mi) great-circle route with an initial bearing of 300° (WNW). Typical cruise altitude FL350, expected flight time 4h 51m, common aircraft: Boeing 737-800, Airbus A320neo, Airbus A321neo.
Distance
1,998 NM
3,700 km / 2,299 mi
Initial Bearing
300° (WNW)
True heading at departure
Typical Cruise
FL350
35,000 ft
Block Time
4h 51m
Typical jet, no wind correction
Fuel Estimate
7,494 kg
Single-aisle equivalent + reserve
Departure Elevation
313 ft
KIAD
Arrival Elevation
433 ft
KSEA
What aircraft fly this route?
For a 1,998 NM mission, operators typically deploy:
- Boeing 737-800
- Airbus A320neo
- Airbus A321neo
- Boeing 737 MAX 8
Weather considerations
Pilots flying IAD-SEA should brief METARs and TAFs at both ends, plus any en-route SIGMETs.
Frequently asked questions
What is the distance between IAD and SEA?
1,998 nautical miles (3,700 km / 2,299 statute miles) great-circle.
How long is the flight from Washington D.C. to Seattle?
Approximately 4h 51m block-to-block for a typical commercial jet, depending on aircraft type and winds.
What aircraft typically fly IAD-SEA?
Common types include Boeing 737-800, Airbus A320neo, Airbus A321neo, Boeing 737 MAX 8 depending on operator and demand.
What altitude do flights cruise at?
Most flights at this distance cruise around FL350 (35,000 ft), though winds and traffic affect filed altitude.
What initial heading is the route?
300° true (WNW). Track varies along the route due to great-circle curvature.
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