Cheap flights from Washington, D.C. to Knoxville from $29

The month of April is, on average, the cheapest month to fly to Knoxville from Washington, D.C., with most prices found around $213. If you aren’t able to travel during the month of April, then book flights to Knoxville from Washington, D.C. during July instead. Flights to Knoxville in July, while not as cheap as those in April, still average around $225.

The cheapest day to depart from Washington, D.C. to Knoxville is on a Thursday. Travelers who choose to depart for Knoxville on a Thursday will often find tickets for as low as $260. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. to Knoxville for around $339.

In the afternoon is the cheapest time of day to fly from Washington, D.C. to Knoxville when you can find flight prices for as low as $184. Flying to Knoxville in the afternoon is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Knoxville is in the morning when prices are around $338.

Fly from Washington, D.C. Dulles Intl to Knoxville McGhee Tyson for the best Washington, D.C. - Knoxville McGhee Tyson flight prices

You are more likely to see cheaper flights to Knoxville from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to Knoxville for around $273 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Knoxville from Washington, D.C. for as low as $112 on momondo.

There are 4 cabin classes available to choose from on Washington, D.C. to Knoxville flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

No. A direct flight is the cheapest option for a flight between Washington, D.C. to Knoxville.

As of October 2026, prices for Washington, D.C. to Knoxville flights are approximately 65% cheaper when compared to flights at the same time last year.

Delta, Southwest, and United Airlines are the most popular carriers operating from Washington, D.C. to Knoxville McGhee Tyson

American Airlines, Allegiant Air and United Airlines are the top three most popular airlines that fly to Knoxville from Washington, D.C. according to our data. American Airlines is the first choice among our users, with 53% of people opting to fly with this airline when traveling to Knoxville. Keep in mind that there are 6 different airlines that fly to Knoxville on a routine basis, so you have a few additional options to choose from.

The number of flights available between Washington, D.C. and Knoxville is 18 per day as of October 2026. The most frequent departure time is 6:00PM, with 56% of daily flights leaving in the evening.

128 flights are operational weekly from Washington, D.C. to Knoxville as of October 2026. The most popular departure day for this route is Thu, with 18% of flights per week taking off on this day.