Dulles (IAD) to Knoxville/Maryville (TYS)
Flight time
≈ 1h 38m
Bearing
241° SW
Dulles (IAD) to Knoxville/Maryville (TYS) is 419 miles (674 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies IAD–TYS
Filed traffic dataIn May 2026, CommuteAir operated the most departures, one of 4 carriers flying nonstop IAD–TYS; the Embraer ERJ-145 was the most common aircraft at 65% of departures; flights ran 81% full.
Departures
225
May 2026
Seats
14,741
both directions
Passengers
11,897
both directions
Load factor
80.7%
RPM ÷ ASM
Who flies IAD–TYS?
CommuteAir operated the most nonstop IAD–TYS departures in May 2026 (146), one of 4 carriers on the route.
- C5
146 departures · 7,300 seats
Share of departures64.9%87.2%
Load
- YV
62 departures · 4,496 seats
Share of departures27.6%74.2%
Load
- G4
16 departures · 2,880 seats
Share of departures7.1%74.0%
Load
- OH
1 departures · 65 seats
Share of departures0.4%100.0%
Load
What plane flies IAD–TYS?
In May 2026, the Embraer ERJ-145 flew 65% of IAD–TYS departures — more than any other aircraft type.
- Embraer ERJ-145
146 departures · 87.2% load
64.9% - Embraer E175
62 departures · 74.2% load
27.6% - Airbus A320
16 departures · 74.0% load
7.1% - Bombardier CRJ-700
1 departures · 100.0% load
0.4%
How has IAD–TYS traffic changed?
Nonstop IAD–TYS departures fell from 260 in June 2025 to 225 in May 2026.
Monthly nonstop IAD–TYS traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
260 departures · 12,790 passengers
83.3%
Load
July 2025
256 departures · 12,332 passengers
83.1%
Load
August 2025
257 departures · 11,775 passengers
77.5%
Load
September 2025
231 departures · 10,346 passengers
87.4%
Load
October 2025
211 departures · 10,034 passengers
81.1%
Load
November 2025
253 departures · 11,223 passengers
75.5%
Load
December 2025
234 departures · 11,133 passengers
79.1%
Load
January 2026
185 departures · 7,376 passengers
66.6%
Load
February 2026
181 departures · 7,920 passengers
71.2%
Load
March 2026
202 departures · 9,932 passengers
79.8%
Load
April 2026
197 departures · 9,927 passengers
81.1%
Load
May 2026
225 departures · 11,897 passengers
80.7%
Load
By direction
Each direction is filed separately — they rarely match.
TYS → IAD
83.8% full
113 departures · 6,215 passengers
IAD → TYS
77.6% full
112 departures · 5,682 passengers
Nonstop IAD–TYS traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through May 2026; filings from 2025. Public domain (US Government work).
The airports
Frequently asked
How far is Dulles (IAD) from Knoxville/Maryville (TYS)?
IAD to TYS is 419 miles (674 km / 364 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from IAD to TYS?
A nonstop covers the 419-mile great-circle distance in roughly 1h 38m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies IAD–TYS?
In May 2026, the Embraer ERJ-145 flew the largest share of departures (64.9%), followed by the Embraer E175 (27.6%).
What mileage do I earn flying IAD–TYS?
Distance-based programs credit off the 419-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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