Distance from Ottawa (YOW) to Washington (DCA)
Great-circle flight distance, flight time & route type — computed from real airport coordinates.
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Quick answer: Ottawa to Washington distance at a glance
Flight distance from Ottawa (YOW) to Washington (DCA) is 451 miles (726 km, 392 nm) great-circle using real OpenFlights coordinates, with an estimated nonstop time of 54m and route type short-haul regional. Coordinates are 45.30°, -75.70° → 38.85°, -77.04°, bearing 189° south from haversine formula.
Facts computed from OpenFlights — not estimated. See methodology below.
The great-circle distance from Ottawa (YOW, Canada) to Washington (DCA, United States) is 451 miles (726 kilometers, 392 nautical miles). This is the shortest path a plane could fly between the two airports, measured along the surface of the Earth using the haversine formula on the airports' real published coordinates (45.30°, -75.70° for YOW; 38.85°, -77.04° for DCA). A nonstop flight on this route is estimated to take about 54 minutes, assuming a typical cruise ground speed of 500 mph including climb-out and descent. The destination lies roughly south of the origin (initial bearing 189°), placing the midpoint of this route near coordinates (42.08°, -76.37°).
By route type, this is a short-haul regional flight. Short-haul routes are typically served by narrowbody jets and regional turboprops, and nonstop service is common between major cities. The destination's solar time zone is 0 hour the same as the origin (see our time zone tool for the full breakdown). Estimated carbon footprint per passenger is about 41 kg CO₂ in economy, and the route difficulty score is 1/10.
Great-circle route from Ottawa (YOW, 45.30°, -75.70°) to Washington (DCA, 38.85°, -77.04°). The dashed line is the shortest path between the two airports on the Earth's surface — the path a nonstop flight would follow. The midpoint at (42.08°, -76.37°) gives a sense of which region the flight overflies.
How this distance is calculated
TripRoute computes the great-circle distance between two airports using the haversine formula applied to each airport's published latitude and longitude from the public OpenFlights airports.dat dataset (the same data that powers airline route maps worldwide). The haversine formula accounts for the curvature of the Earth, so the result is the true shortest distance along the surface — not a straight line on a flat map. We express it in statute miles (451 mi), kilometers (726 km, conversion factor 1.60934), and nautical miles (392 nm, factor 0.868976). The estimated flight time assumes a ground speed of 500 mph including the climb and descent phases, which is a reasonable average for subsonic commercial jets — actual flight time varies with winds, routing, and the specific aircraft type. The compass direction (south, bearing 189°) is the initial great-circle bearing from origin to destination; the path curves slightly because of the Earth's curvature on long sectors.
TRWhen distance matters most for YOW → DCA
At 451 miles this is a train-or-plane decision — compare door-to-door time, not just air distance. Where rail exists on the corridor, it often beats flying once airport security time is counted.
Guidance derived from the computed great-circle distance and category bands.
Ottawa to Washington — quick answers
How far is Ottawa from Washington by plane?
The nonstop flight distance from YOW (Ottawa) to DCA (Washington) is 451 miles (726 km, 392 nautical miles), measured as a great-circle line across Earth's surface using the airports' published coordinates. This haversine calculation accounts for Earth's curvature and matches airline navigation charts; actual flown distance is slightly longer due to airways and winds.
How long does it take to fly from Ottawa to Washington?
Estimated nonstop flight time is 54 minutes, assuming a typical jet cruise speed of about 500 mph including climb and descent. Gate-to-gate time is usually 20–35 minutes longer for taxi and air-traffic routing, and connecting itineraries add 1–4 hours depending on layover length and airport connection efficiency.
Is YOW to DCA a short, medium, or long-haul flight?
This is a short-haul regional flight (451 miles). Short-haul routes are typically flown by narrowbody jets and regional aircraft with frequent nonstop service. Flight categories follow industry distance bands that predict aircraft type and service level, so you can anticipate cabin options and connection likelihood.