Southwest® flights from Knoxville to Washington D.C. Reagan National from $134

Promo Code

Low fares from Knoxville to Washington D.C. Reagan National

$

Knoxville (TYS)to

Washington D.C. Reagan National (DCA)
Depart: 10/08/2026

One-way

Basic

From
$134

Low fares from Knoxville to Washington D.C. Reagan National

$

Knoxville (TYS)to

Washington D.C. Reagan National (DCA)
Depart: 10/08/2026

One-way

Basic

From
$134
Seen: 13 hrs ago

Knoxville (TYS)to

Washington D.C. Reagan National (DCA)
Depart: 10/05/2026

One-way

Basic

From
$134
Seen: 20 hrs ago

Knoxville (TYS)to

Washington D.C. Reagan National (DCA)
Depart: 11/14/2026

One-way

Basic

From
$134
Seen: 1 hour ago

Knoxville (TYS)to

Washington D.C. Reagan National (DCA)
Depart: 10/05/2026

One-way

Choice

From
$169
Seen: 20 hrs ago

Knoxville (TYS)to

Washington D.C. Reagan National (DCA)
Depart: 10/08/2026

One-way

Choice

From
$169
Seen: 13 hrs ago

Knoxville (TYS)to

Washington D.C. Reagan National (DCA)
Depart: 11/14/2026

One-way

Choice

From
$169
Seen: 1 hour ago

Looking for more low-fare flights?

Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

Find low fares

Explore flights from Knoxville to Washington D.C. Reagan National

Sep 2026
From$170*
Seen: 10 hrs ago
One Way/Basic
Oct 2026
From$134*
Seen: 20 hrs ago
One Way/Basic
Nov 2026
From$134*
Seen: 1 hour ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $170
cmp-daily-histogram-bars-legend-max-price-aria-label $379
Displaying fares for September-2026
  • TYS–DCA, 09/01/2026: From $227
    01

    Tue

    SEP

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    02

    Wed

  • TYS–DCA, 09/03/2026: From $250
    03

    Thu

  • TYS–DCA, 09/04/2026: From $250
    04

    Fri

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    05

    Sat

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    06

    Sun

  • TYS–DCA, 09/07/2026: From $379
    07

    Mon

  • TYS–DCA, 09/08/2026: From $215
    08

    Tue

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    09

    Wed

  • TYS–DCA, 09/10/2026: From $194
    10

    Thu

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    11

    Fri

  • TYS–DCA, 09/12/2026: From $194
    12

    Sat

  • TYS–DCA, 09/13/2026: From $374
    13

    Sun

  • TYS–DCA, 09/14/2026: From $184
    14

    Mon

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    15

    Tue

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    16

    Wed

  • TYS–DCA, 09/17/2026: From $170
    17

    Thu

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    18

    Fri

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    19

    Sat

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    20

    Sun

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    21

    Mon

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    22

    Tue

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    23

    Wed

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    24

    Thu

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    25

    Fri

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    26

    Sat

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    27

    Sun

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    28

    Mon

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    29

    Tue

  • TYS–DCA: cmp-view-offers-disclaimer. Find Offers
    30

    Wed

    • Range$170-$379

    *Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply. Modifying this information may result in a different fare. To find the most updated fare, please visit Southwest.com. Fares listed are Basic, which are subject to additional terms and conditions.

    Flight Details

    Departing from:
    Mc Ghee Tyson Airport
    Arriving at:
    Ronald Reagan National Airport
    Distance:
    437 miles

    Route Information

    45† Weekly flights

    † Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.

    ‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.

    Questions we hear the most

    There are 45 weekly flights from Knoxville to Washington, D.C. (Reagan National) on Southwest Airlines.
    To find the lowest fares by day and time to fly Knoxville to Washington, D.C. (Reagan National) with Southwest, check out our Low Fare Calendar.
    You can rent a car at Ronald Reagan National Airport book yours with your flight.
    Yes! Flights from Knoxville to Washington, D.C. (Reagan National)—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
    Check the status of your upcoming Southwest flight.
    Check out the Southwest Airlines® Help Center for answers about everything Southwest.

    Explore Flights from Other Popular Origins

    Popular Flights from Knoxville