Cheap Flights from Washington D.C. to Knoxville from $39

Frequently Asked Questions

• What are the cheapest flights from Washington D.C. to Knoxville (WAS-TYS)?

  Based on Trip.com data, Allegiant Air offers one-way fares as low as $39 on Cheapest nonstop routes (e.g. IAD to TYS on Mon, Apr 20), while Allegiant Air offers Cheapest nonstop round-trips from $119 departing on Fri, Apr 17 and returning on Mon, Apr 20.

• Which airlines offer direct flights from Washington D.C. to Knoxville?

  At the moment, you can catch a nonstop flight from Washington D.C. to Knoxville with the following airlines, including: Allegiant Air United Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long does it take to fly from Washington D.C. (WAS) to Knoxville (TYS) and what is the distance?

  It takes around 1 hour 35 minutes to fly from Washington D.C. (WAS) to Knoxville (TYS).

• When is the best time to book flights from Washington D.C. to Knoxville?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Washington D.C. to Knoxville is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there per week from Washington D.C. to Knoxville?

  Based on Trip.com data in the past 4 weeks, there is 40 flight per week flying from Washington D.C. to Knoxville. You can check the weekly schedule for popular airlines on this route below: United Airlines: S/M/T/W/T/F/S -- UA4257 (09:15)

• How can I find the best deals on flights from Washington D.C. to Knoxville?

  To find best deals on flights from Washington D.C. to Knoxville, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Mon, Apr 20, with one-way flights priced at just $39.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Allegiant Air.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for Knoxville travel is around January.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Washington D.C. (WAS) to Knoxville (TYS) the cheapest?

  The cheapest months to fly from Washington D.C. to Knoxville is November, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Washington D.C. to Knoxville on?

  After crunching the numbers on our April flight calendar, it's currently cheapest to fly from Washington D.C. to Knoxville on April 19, 2026 with Allegiant Air, with prices starting at $34.

• Which airports can I fly to for Knoxville from Washington D.C.?

  You can land at any one of the following hubs in Knoxville, with Dulles International Airport to Mcghee Tyson Airport (IAD-TYS) is by far the most common option on this route: Mcghee Tyson Airport (TYS).

• Is there any time difference between Washington D.C. and Knoxville?

  The time difference between Knoxville and Washington D.C. is 0h.

• How do I change or cancel my ticket from Washington D.C. to Knoxville?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.