--- title: "Washington to Knoxville flights: who flies IAD-TYS" description: "United Airlines and Allegiant Air fly nonstop from IAD to TYS, about 29 flights a week, scheduled at 1h 28m to 1h 47m. See the full timetable and who flies it on 2LNR." canonical: "https://2lnr.com/routes/iad-tys" url: "https://2lnr.com/routes/iad-tys.md" date_modified: "2026-10-18T05:10:47Z" --- # Washington to Knoxville (IAD-TYS): nonstop flights and who flies them United Airlines and Allegiant Air fly nonstop between Washington (IAD) and Knoxville (TYS), roughly 29 times a week. The timetable below shows the nonstop scheduled at 1h 28m to 1h 47m for the 420 miles. Schedule last confirmed October 18, 2026. Departure times come from 2LNR's schedule data; confirm with the airline before you book. Updated October 22, 2026. See IAD to TYS on the interactive map [Get started free](https://2lnr.com/login) 29 Flights a week, 4-week average 1h 28m to 1h 47m Scheduled flight time 420 mi Nonstop distance Free To get started ## Washington to Knoxville flight schedule Scheduled nonstop departures for IAD to TYS starting October 22, 2026, last checked against our schedule feed on October 18, 2026. Airlines retime and cancel flights, so confirm with the airline before you book. Scheduled nonstop departures from Washington (IAD) to Knoxville (TYS) | Date | Flight | Airline | Departs IAD | Arrives TYS | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Thu, Oct 22 | UA 4257 | United Airlines | 09:00 | 10:37 | 1h 37m | ERJ | | Thu, Oct 22 | G4 3033 | Allegiant Air | 10:01 | 11:29 | 1h 28m | [Airbus A320](https://2lnr.com/seatmaps/g4/a320.md) | | Thu, Oct 22 | UA 4070 | United Airlines | 12:55 | 14:42 | 1h 47m | [Embraer E175](https://2lnr.com/seatmaps/ua/e175.md) | | Thu, Oct 22 | UA 4914 | United Airlines | 18:37 | 20:19 | 1h 42m | ERJ | | Thu, Oct 22 | UA 4304 | United Airlines | 22:13 | 23:59 | 1h 46m | ERJ | | Fri, Oct 23 | UA 4070 | United Airlines | 12:55 | 14:42 | 1h 47m | Embraer E175 | | Fri, Oct 23 | UA 4914 | United Airlines | 18:37 | 20:19 | 1h 42m | ERJ | | Fri, Oct 23 | UA 4304 | United Airlines | 22:13 | 23:59 | 1h 46m | ERJ | | Sat, Oct 24 | UA 4257 | United Airlines | 09:00 | 10:37 | 1h 37m | ERJ | | Sat, Oct 24 | UA 4070 | United Airlines | 12:55 | 14:42 | 1h 47m | Embraer E175 | | Sat, Oct 24 | UA 4914 | United Airlines | 18:37 | 20:19 | 1h 42m | ERJ | | Sat, Oct 24 | UA 4304 | United Airlines | 22:13 | 23:59 | 1h 46m | ERJ | | Sun, Oct 25 | G4 1409 | Allegiant Air | 08:16 | 09:44 | 1h 28m | Airbus A320 | | Sun, Oct 25 | UA 4070 | United Airlines | 12:55 | 14:42 | 1h 47m | Embraer E175 | | Sun, Oct 25 | UA 4914 | United Airlines | 18:37 | 20:19 | 1h 42m | ERJ | | Sun, Oct 25 | UA 4304 | United Airlines | 22:13 | 23:59 | 1h 46m | ERJ | | Mon, Oct 26 | UA 4257 | United Airlines | 09:00 | 10:37 | 1h 37m | ERJ | | Mon, Oct 26 | UA 4070 | United Airlines | 12:55 | 14:42 | 1h 47m | Embraer E175 | | Mon, Oct 26 | UA 4914 | United Airlines | 18:37 | 20:19 | 1h 42m | ERJ | | Mon, Oct 26 | UA 4304 | United Airlines | 22:13 | 23:59 | 1h 46m | ERJ | | Tue, Oct 27 | UA 4257 | United Airlines | 09:00 | 10:37 | 1h 37m | ERJ | | Tue, Oct 27 | UA 4070 | United Airlines | 12:55 | 14:42 | 1h 47m | Embraer E175 | | Tue, Oct 27 | UA 4914 | United Airlines | 18:37 | 20:19 | 1h 42m | ERJ | | Tue, Oct 27 | UA 4304 | United Airlines | 22:13 | 23:59 | 1h 46m | ERJ | | Wed, Oct 28 | UA 4257 | United Airlines | 09:00 | 10:37 | 1h 37m | ERJ | | Wed, Oct 28 | UA 4070 | United Airlines | 12:55 | 14:42 | 1h 47m | Embraer E175 | | Wed, Oct 28 | UA 4914 | United Airlines | 18:37 | 20:19 | 1h 42m | ERJ | | Wed, Oct 28 | UA 4304 | United Airlines | 22:13 | 23:59 | 1h 46m | ERJ | Showing all 28 scheduled IAD to TYS departures across 7 days with service, starting October 22, 2026. Later dates are on the interactive map. Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure. See every IAD to TYS date on the interactive map ## Aircraft on the Washington to Knoxville nonstop In the schedule table on this page, United Airlines flies the Embraer ERJ and the [Embraer E175](https://2lnr.com/seatmaps/ua/e175.md), and Allegiant Air flies the [Airbus A320](https://2lnr.com/seatmaps/g4/a320.md). Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure. ## The full IAD to TYS nonstop schedule This page carries the full IAD to TYS nonstop schedule, who operates each departure and how often it runs; the reverse direction is linked below. ### See the schedule Who operates each IAD to TYS nonstop and how often it runs, from 2LNR's schedule data. ### Plan on the map See IAD to TYS on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying Washington to Knoxville nonstop Carriers operating IAD to TYS nonstop in the current schedule. - [United Airlines (UA) route map](https://2lnr.com/routes/airlines/ua.md)\ [The aircraft UA flies](https://2lnr.com/seatmaps/ua.md) - [Allegiant Air (G4) route map](https://2lnr.com/routes/airlines/g4.md)\ [The aircraft G4 flies](https://2lnr.com/seatmaps/g4.md) See IAD to TYS on the interactive map → ## Frequently asked questions about IAD to TYS **How long is the flight from Washington (IAD) to Knoxville (TYS)?** Scheduled flight times from Washington (IAD) to Knoxville (TYS) run from 1h 28m to 1h 47m across the departures in the schedule table on this page. The nonstop covers about 420 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **Which airlines fly nonstop from IAD to TYS?** United Airlines and Allegiant Air fly IAD to TYS nonstop. 2LNR doesn't show award or upgrade space for any of them on IAD to TYS, so this page carries the schedule rather than a space claim. **How many flights a week are there from IAD to TYS?** About 29 nonstop flights a week run between Washington (IAD) and Knoxville (TYS) in the current schedule, operated by United Airlines and Allegiant Air. Frequency shifts by season, and the schedule table on this page shows what is scheduled next. **What time do flights from IAD to TYS depart?** Scheduled IAD to TYS nonstops in the next 7 days with service leave between 08:16 and 22:13, local time at Washington. The schedule table on this page lists every departure by date, with its arrival time and aircraft. **Which flights operate IAD to TYS nonstop?** In the schedule table on this page, IAD to TYS nonstops fly as UA 4070, UA 4257, UA 4304, and UA 4914 on United Airlines, and G4 1409 and G4 3033 on Allegiant Air. The table lists each departure by date with its times and aircraft. **Does 2LNR show upgrade or award space on IAD to TYS?** Not on this route: 2LNR doesn't show award or upgrade space for any airline flying IAD to TYS. The page carries the full IAD to TYS nonstop schedule and who flies each departure, and the reverse direction is linked below. Flying the other way? See [TYS to IAD nonstop flights](https://2lnr.com/routes/tys-iad.md). Award seats rather than schedules? See [award availability by airline](https://2lnr.com/awards.md). Looking beyond this route? See [every route from Washington (IAD)](https://2lnr.com/routes/iad.md), or [every route from Knoxville (TYS)](https://2lnr.com/routes/tys.md). Nonstops to Knoxville (TYS) from other airports within 150 miles of Washington (IAD): - [Washington (DCA) to Knoxville (TYS)](https://2lnr.com/routes/dca-tys.md), 23 miles from IAD - [Philadelphia (PHL) to Knoxville (TYS)](https://2lnr.com/routes/phl-tys.md), 134 miles from IAD Nonstops from Washington (IAD) to other airports within 150 miles of Knoxville (TYS): - [Washington (IAD) to Asheville (AVL)](https://2lnr.com/routes/iad-avl.md), 86 miles from TYS - [Washington (IAD) to Greenville (GSP)](https://2lnr.com/routes/iad-gsp.md), 119 miles from TYS Distances are great-circle between the airports, not driving distance. - [How to plan an upgrade by route](https://2lnr.com/guides/upgrade-strategy.md) ## See the full IAD to TYS nonstop schedule Every scheduled departure on this route, with who flies it. 2LNR shows upgrade and award space by date on the carriers it tracks, the next 14 days free on every product and the full horizon on Pro. [Get started free](https://2lnr.com/login)