Houston (HOU) to Dulles (IAD)
Flight time
≈ 3h 12m
Bearing
53° NE
Houston (HOU) to Dulles (IAD) is 1,200 miles (1,931 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies HOU–IAD
Filed traffic dataIn July 2026, Sun Country Airlines was the only carrier flying nonstop HOU–IAD; the Boeing 737-800 was the most common aircraft at 100% of departures; flights ran 32% full.
Departures
2
July 2026
Seats
372
both directions
Passengers
118
both directions
Load factor
31.7%
RPM ÷ ASM
Who flies HOU–IAD?
Sun Country Airlines was the only carrier to fly nonstop HOU–IAD in July 2026 (2 departures).
- SY
2 departures · 372 seats
Share of departures100.0%31.7%
Load
What plane flies HOU–IAD?
In July 2026, the Boeing 737-800 flew 100% of HOU–IAD departures.
- Boeing 737-800
2 departures · 31.7% load
100.0%
How has HOU–IAD traffic changed?
Nonstop HOU–IAD departures held steady at about 2 a month between August 2025 and July 2026.
Monthly nonstop HOU–IAD traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
2 departures · 0 passengers
0.0%
Load
September 2025
0 departures · 0 passengers
—
Load
October 2025
0 departures · 0 passengers
—
Load
November 2025
1 departures · 61 passengers
84.7%
Load
December 2025
0 departures · 0 passengers
—
Load
January 2026
2 departures · 2 passengers
12.5%
Load
February 2026
1 departures · 6 passengers
50.0%
Load
March 2026
0 departures · 0 passengers
—
Load
April 2026
0 departures · 0 passengers
—
Load
May 2026
0 departures · 0 passengers
—
Load
June 2026
0 departures · 0 passengers
—
Load
July 2026
2 departures · 118 passengers
31.7%
Load
By direction
Each direction is filed separately — they rarely match.
HOU → IAD
31.7% full
1 departures · 59 passengers
IAD → HOU
31.7% full
1 departures · 59 passengers
Nonstop HOU–IAD traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through July 2026; filings from 2025. Public domain (US Government work).
The airports
Frequently asked
How far is Houston (HOU) from Dulles (IAD)?
HOU to IAD is 1,200 miles (1,931 km / 1,043 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from HOU to IAD?
A nonstop covers the 1,200-mile great-circle distance in roughly 3h 12m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies HOU–IAD?
In July 2026, the Boeing 737-800 flew the largest share of departures (100.0%).
What mileage do I earn flying HOU–IAD?
Distance-based programs credit off the 1,200-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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