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Dulles → Knoxville

Dec 21, 2026 · return Dec 23, 2026

IAD → TYS1 adulteconomyRound trip

5 flight options · 4 airlines

Nonstop flights

Mon, Dec 21 – Wed, Dec 23

Allegiant Air
4:22 pmIAD
1h 32m
Nonstop
5:54 pmTYS
United Airlines
7:35 pmTYS
1h 40m
Nonstop
9:15 pmIAD

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Wed, Dec 23

United Airlines
9:40 amIAD
1h 50m
Nonstop
11:30 amTYS
United Airlines
7:35 pmTYS
1h 40m
Nonstop
9:15 pmIAD

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Wed, Dec 23

United Airlines
10:15 pmIAD
1h 44m
Nonstop
11:59 pmTYS
United Airlines
7:35 pmTYS
1h 40m
Nonstop
9:15 pmIAD

Round-trip total · 1 adult · Taxes included

One-stop flights

Mon, Dec 21 – Wed, Dec 23

American Airlines
6:00 amIAD
4h 33m
CLT · 1h 33m
10:33 amTYS
American Airlines
6:05 pmTYS
3h 56m
CLT · 1h 6m
10:01 pmIAD

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Wed, Dec 23

Delta Air Lines
12:34 pmIAD
4h 48m
ATL · 1h 54m
5:22 pmTYS
Delta Air Lines
10:35 amTYS
5h 27m
ATL · 2h 45m
4:02 pmIAD

Round-trip total · 1 adult · Taxes included

Make this trip yours

IAD ⇄ TYS

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

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  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, Allegiant Air emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
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Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

More dates

All dates for this routeNov 24, 2026 → Nov 29, 2026Dec 22, 2026 → Dec 27, 2026Dec 30, 2026 → Jan 2, 2027Jan 15, 2027 → Jan 18, 2027Oct 30, 2026 → Nov 2, 2026Oct 31, 2026 → Nov 7, 2026Nov 27, 2026 → Nov 30, 2026Nov 28, 2026 → Dec 5, 2026Dec 25, 2026 → Dec 28, 2026Dec 26, 2026 → Jan 2, 2027Jan 22, 2027 → Jan 25, 2027Oct 30, 2026 · One way
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-21 → 2026-12-23Allegiant Air / United AirlinesG43007 / UA6255$303.132026-10-29T01:08:48Z
2026-12-21 → 2026-12-23United AirlinesUA4257 / UA6255$393.762026-10-29T01:08:48Z
2026-12-21 → 2026-12-23American AirlinesAA1637 + AA6018 / AA6343 + AA1473$381.262026-10-29T01:08:48Z
2026-12-21 → 2026-12-23Delta Air LinesDL1444 + DL2571 / DL4666 + DL1695$418.762026-10-29T01:08:48Z
2026-12-21 → 2026-12-23United AirlinesUA4304 / UA6255$393.762026-10-29T01:08:48Z

2026-12-21 → 2026-12-23 · $303.13

  • Allegiant Air G43007: IAD 2026-12-21 16:22:00 → TYS 2026-12-21 17:54:00; nonstop; 92 minutes. Local airport times.
  • United Airlines UA6255: TYS 2026-12-23 19:35:00 → IAD 2026-12-23 21:15:00; nonstop; 100 minutes. Local airport times.

2026-12-21 → 2026-12-23 · $393.76

  • United Airlines UA4257: IAD 2026-12-21 09:40:00 → TYS 2026-12-21 11:30:00; nonstop; 110 minutes. Local airport times.
  • United Airlines UA6255: TYS 2026-12-23 19:35:00 → IAD 2026-12-23 21:15:00; nonstop; 100 minutes. Local airport times.

2026-12-21 → 2026-12-23 · $381.26

  • American Airlines AA1637 / AA6018: IAD 2026-12-21 06:00:00 → TYS 2026-12-21 10:33:00; 1 stop(s) via CLT; 273 minutes. Local airport times.
    • AA1637: IAD 2026-12-21 06:00:00 → CLT 2026-12-21 07:37:00; layover at CLT: 93 minutes.
    • AA6018: CLT 2026-12-21 09:10:00 → TYS 2026-12-21 10:33:00.
  • American Airlines AA6343 / AA1473: TYS 2026-12-23 18:05:00 → IAD 2026-12-23 22:01:00; 1 stop(s) via CLT; 236 minutes. Local airport times.
    • AA6343: TYS 2026-12-23 18:05:00 → CLT 2026-12-23 19:34:00; layover at CLT: 66 minutes.
    • AA1473: CLT 2026-12-23 20:40:00 → IAD 2026-12-23 22:01:00.

2026-12-21 → 2026-12-23 · $418.76

  • Delta Air Lines DL1444 / DL2571: IAD 2026-12-21 12:34:00 → TYS 2026-12-21 17:22:00; 1 stop(s) via ATL; 288 minutes. Local airport times.
    • DL1444: IAD 2026-12-21 12:34:00 → ATL 2026-12-21 14:31:00; layover at ATL: 114 minutes.
    • DL2571: ATL 2026-12-21 16:25:00 → TYS 2026-12-21 17:22:00.
  • Delta Air Lines DL4666 / DL1695: TYS 2026-12-23 10:35:00 → IAD 2026-12-23 16:02:00; 1 stop(s) via ATL; 327 minutes. Local airport times.
    • DL4666: TYS 2026-12-23 10:35:00 → ATL 2026-12-23 11:36:00; layover at ATL: 165 minutes.
    • DL1695: ATL 2026-12-23 14:21:00 → IAD 2026-12-23 16:02:00.

2026-12-21 → 2026-12-23 · $393.76

  • United Airlines UA4304: IAD 2026-12-21 22:15:00 → TYS 2026-12-21 23:59:00; nonstop; 104 minutes. Local airport times.
  • United Airlines UA6255: TYS 2026-12-23 19:35:00 → IAD 2026-12-23 21:15:00; nonstop; 100 minutes. Local airport times.

More dates for this route