The U.S. aircraft register, updated daily
Routes and flights · the DOT's airline reports, August 2025 to July 2026

Washington Dulles International ⇄ MC Ghee Tyson IAD–TYS

Airlines flew 2,696 flights between Washington Dulles International IAD in Washington, DC and MC Ghee Tyson TYS in Knoxville, TN in the twelve months to July 2026, both directions together: 128,597 passengers in 163,360 seats, 79% of them filled, and 6 pounds of freight. 420 miles, about 69 minutes in the air, on 7 airlines: CommuteAir LLC dba CommuteAir (2,317), Allegiant Air (187), Mesa Airlines Inc. (186), Republic Airline (2) and 3 more. Planning to fly it yourself? The weather and winds along this route right now.

2,696
flights, twelve months
IAD-TYS: 1,346 · TYS-IAD: 1,350
128,597
passengers
79% of seats filled
420
miles
about 69 minutes airborne
7
airlines
6 aircraft types

Flights by month both directions

0661321972631/254/257/2510/251/264/262637/26
By month, as a table
flights
1/25189
2/25168
3/25235
4/25218
5/25213
6/25260
7/25256
8/25257
9/25231
10/25211
11/25253
12/25234
1/26185
2/26181
3/26202
4/26197
5/26225
6/26257
7/26263

Passengers by month

03,4386,87710,31613,7541/254/257/2510/251/264/2613,7547/26
By month, as a table
passengers
1/257,513
2/256,578
3/259,488
4/259,478
5/259,961
6/2512,790
7/2512,332
8/2511,775
9/2510,346
10/2510,034
11/2511,223
12/2511,133
1/267,376
2/267,920
3/269,932
4/269,927
5/2611,897
6/2613,280
7/2613,754

The airlines twelve months, both directions

AirlineFlightsPassengersSeats filledService
CommuteAir LLC dba CommuteAir C52,31798,79085%scheduled passenger service
Allegiant Air G418719,34957%scheduled passenger service
Mesa Airlines Inc. YV18610,11676%scheduled passenger service
Republic Airline YX211274%scheduled passenger service
PSA Airlines Inc. OH210984%scheduled passenger service
United Air Lines Inc. UA112196%scheduled passenger service
SkyWest Airlines Inc. OO100%scheduled passenger service

The aircraft as the airlines report their types

AircraftFlightsSeats a flightPassengers
Embraer-1452,3175098,790
Embraer ERJ-1751887210,228
Airbus Industrie A320-100/20018718019,349
Canadair RJ-700265109
Boeing 737-700/700LR/Max 71126121
Canadair RJ-200ER /RJ-4401500

IAD → TYS this direction alone · flown January 2025 to July 2026

1,346 flights of 1,361 scheduled, 64,196 passengers in 81,526 seats. CommuteAir LLC dba CommuteAir 1,158; Allegiant Air 93; Mesa Airlines Inc. 93; United Air Lines Inc. 1; Republic Airline 1.

TYS → IAD this direction alone · flown January 2025 to July 2026

1,350 flights of 1,365 scheduled, 64,401 passengers in 81,834 seats, 6 pounds of freight. CommuteAir LLC dba CommuteAir 1,159; Allegiant Air 94; Mesa Airlines Inc. 93; PSA Airlines Inc. 2; SkyWest Airlines Inc. 1; Republic Airline 1.

Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: Washington Dulles International IAD and MC Ghee Tyson TYS; all routes.