IAD → TYSWashington to Knoxville/Maryville

live

Direct flights from Washington (IAD) to Knoxville/Maryville (TYS): 7 nonstop departures observed each week across 1 airline. 50% of the last 26 operated flights arrived within 15 minutes of schedule. The median arrival is 14 minutes late. 1 of the 26 tracked flights was cancelled. The nonstop covers 674 km, an estimated 1 hour 22 minutes in the air. Measured by Pro Flight Search from live flight boards at Washington and Knoxville/Maryville. Updated 9 September 2026 at 14:18 UTC.

IAD Washington smooth · +11
TYS Knoxville/Maryville tracking
674 km · ~1h 22m est.
dep bank 09:00–22:157x weekly
Runs rough · 1 airline · 7x weekly · nonstop
50% on time

of the last 26 operated IAD → TYS flights arrived within 15 minutes

Median arrival delay is +14 min. 1 of 26 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+14 minacross the last 26 operated legs
Flight time~1h 22mestimated from route distance
Weekly departures7x1 direct airline on the leg
Cancelled3.8%recent route rate · 1 of 26

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
United Airlines

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
United AirlinesUA50% on time

Flights UA4257 09:00 Mo Th Fr Sa Su · UA4070 12:50 We Th · UA4914 18:42 daily · UA4304 22:15 daily

History

operated legs · board outcomes
09-081I678departed−22
09-081I975departed+43
09-08UA4070cancelledCNX
09-08UA4304departed+5
09-08UA4914departed+9
09-08YV4070departed+0
09-07UA4257departed+16
09-07UA4304departed+9
09-07UA4914departed+17
09-07YV4070departed+20
09-06UA4257departed+8
09-06UA4304departed+19
09-06UA4914departed+4
09-06YV4070departed+24
09-05UA4257departed+5
09-05UA4304departed+18
09-05UA4914departed+32
09-05YV4070departed+13
09-04UA4257departed+9
09-04UA4304departed+74
09-04UA4914departed+88
09-04YV4070departed+253
09-03UA4257departed+10
09-03UA4304departed+18
09-03UA4914departed+6
09-03YV4070departed+14

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
IADWashington +11 min smooth 🌤 scattered clouds · SSW 10 kt Full IAD delay board →
TYSKnoxville/Maryville tracking Full TYS delay board →

How the Washington to Knoxville/Maryville route actually runs

Pro Flight Search records official board updates for nonstop IAD to TYS flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.

Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — Washington (IAD) to Knoxville/Maryville (TYS) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/IAD-TYS
How we measure this →

IAD to TYS questions

Is IAD–TYS running on time right now?

Smooth skies ahead. The departure side at IAD is the weaker end, route health score 84/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on IAD–TYS?

Operators schedule morning departures around 09:00 and evening departures around 18:42 from IAD. Earlier flights typically land before destination-airport delays accumulate later in the day; check the TYS delay card to confirm conditions when you'd arrive.

How long is the flight from IAD to TYS?

Great-circle distance is 674 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 78–88 min gate-to-gate on this route.

How often does IAD–TYS fly?

United Airlines runs the route with about 21 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.