Dayton (DAY) to Dulles (IAD)
Flight time
≈ 1h 32m
Bearing
98° E
Dayton (DAY) to Dulles (IAD) is 367 miles (590 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies DAY–IAD
US DOT T-100 · filed dataIn April 2026, CommuteAir operated the most departures, one of 2 carriers flying nonstop DAY–IAD; the Embraer ERJ-145 was the most common aircraft at 99% of departures; flights ran 86% full.
Departures
146
April 2026
Seats
7,352
both directions
Passengers
6,309
both directions
Load factor
85.8%
passengers ÷ seats
Who flies DAY–IAD?
CommuteAir operated the most nonstop DAY–IAD departures in April 2026 (144), one of 2 carriers on the route.
- C5
CommuteAir
144 departures · 7,200 seats
Share of departures98.6%86.9%
Load
- YX
Republic Airways
2 departures · 152 seats
Share of departures1.4%35.5%
Load
What plane flies DAY–IAD?
In April 2026, the Embraer ERJ-145 flew 99% of DAY–IAD departures — more than any other aircraft type.
- Embraer ERJ-145
144 departures · 86.9% load
98.6% - Embraer E175
2 departures · 35.5% load
1.4%
How has DAY–IAD traffic changed?
Nonstop DAY–IAD departures fell from 168 in May 2025 to 146 in April 2026.
Monthly nonstop DAY–IAD traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
168 departures · 7,158 passengers
85.2%
Load
June 2025
155 departures · 6,967 passengers
89.0%
Load
July 2025
169 departures · 7,592 passengers
89.6%
Load
August 2025
185 departures · 7,653 passengers
82.7%
Load
September 2025
181 departures · 7,603 passengers
83.9%
Load
October 2025
182 departures · 7,094 passengers
78.0%
Load
November 2025
150 departures · 5,729 passengers
76.4%
Load
December 2025
150 departures · 6,343 passengers
84.6%
Load
January 2026
130 departures · 5,139 passengers
78.9%
Load
February 2026
115 departures · 4,776 passengers
81.9%
Load
March 2026
130 departures · 5,641 passengers
85.1%
Load
April 2026
146 departures · 6,309 passengers
85.8%
Load
By direction
The DOT files each direction separately — they rarely match.
DAY → IAD
85.8% full
73 departures · 3,155 passengers
IAD → DAY
85.8% full
73 departures · 3,154 passengers
Nonstop DAY–IAD traffic has been filed with the US DOT since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through April 2026; filings from 2025. Public domain (US Government work). The DOT publishes roughly three months in arrears.
The airports
Frequently asked
How far is Dayton (DAY) from Dulles (IAD)?
DAY to IAD is 367 miles (590 km / 319 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from DAY to IAD?
A nonstop covers the 367-mile great-circle distance in roughly 1h 32m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies DAY–IAD?
In April 2026, the Embraer ERJ-145 flew the largest share of departures (98.6%), followed by the Embraer E175 (1.4%).
What mileage do I earn flying DAY–IAD?
Distance-based programs credit off the 367-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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