HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Washington, D.C.

$43+ Cheap flights from Knoxville (TYS) to Washington, D.C. (WAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/14. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — WAS
Dec 14 — Dec 211
Sun 12/14
Sun 12/21
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Knoxville to Washington, D.C. with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Knoxville McGhee Tyson to Washington, D.C. are usually found in November or July, booked 75 days in advance, depart on a Friday or Thursday and return on a Wednesday

Find flight deals from Knoxville to Washington, D.C.

Cheapest flights from Knoxville to Washington, D.C.
Explore the most affordable flight options available from Knoxville to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 14, 2025.

This Mytrip deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/172:22 pmTYS - IAD
Nonstop1h 44mAllegiant Air
Sun 11/238:23 pmIAD - TYS
Nonstop1h 40mAllegiant Air
Deal found 11/12$113
This Mytrip deal was found by Cheapflights users on 11/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/115:23 pmTYS - IAD
Nonstop1h 44mAllegiant Air
Sun 12/147:57 pmIAD - TYS
Nonstop1h 40mAllegiant Air
Deal found 11/13$133
This Kiwi.com deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/45:23 pmTYS - IAD
Nonstop1h 44mAllegiant Air
Sun 12/75:21 pmIAD - TYS
1 stop28h 52mAllegiant Air
Deal found 11/12$150
This eDestinos deal was found by Cheapflights users on 11/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/44:52 pmTYS - IAD
2 stops27h 32mMultiple Airlines
Sun 12/77:57 pmIAD - TYS
Nonstop1h 40mMultiple Airlines
Deal found 11/13$155
This FlightHub deal was found by Cheapflights users on 11/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2512:24 pmTYS - IAD
Nonstop1h 44mAllegiant Air
Sat 11/293:04 pmIAD - TYS
Nonstop1h 40mAllegiant Air
Deal found 11/13$156
This Kiwi.com deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/55:34 pmTYS - IAD
1 stop26h 50mMultiple Airlines
Thu 12/117:57 pmIAD - TYS
Nonstop1h 40mMultiple Airlines
Deal found 11/12$164
This Kiwi.com deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/55:34 pmTYS - IAD
1 stop26h 50mMultiple Airlines
Sun 12/77:57 pmIAD - TYS
Nonstop1h 40mMultiple Airlines
Deal found 11/12$167
This Kiwi.com deal was found by Cheapflights users on 11/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/235:49 pmTYS - IAD
Nonstop1h 44mMultiple Airlines
Fri 11/288:35 amIAD - TYS
1 stop10h 44mMultiple Airlines
Deal found 11/13$174
This Kiwi.com deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/121:05 pmTYS - IAD
1 stop7h 19mMultiple Airlines
Sun 12/147:57 pmIAD - TYS
Nonstop1h 40mMultiple Airlines
Deal found 11/12$175
This Kiwi.com deal was found by Cheapflights users on 11/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/196:30 amTYS - IAD
1 stop9h 16mMultiple Airlines
Sun 12/218:16 pmIAD - TYS
Nonstop1h 40mMultiple Airlines
Deal found 11/13$179
This Kiwi.com deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/106:09 pmTYS - BWI
1 stop15h 13mMultiple Airlines
Wed 12/1711:16 amBWI - TYS
1 stop25h 16mMultiple Airlines
Deal found 11/11$179
This United Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/67:25 pmTYS - IAD
Nonstop1h 43mUnited Airlines
Wed 12/109:00 amIAD - TYS
Nonstop1h 48mUnited Airlines
Deal found 11/12$183

Cheap flight deals from Knoxville to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 14, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$113
(Booking.com)

One-way from

$43
(Mytrip)

Popular in

September

Cheapest in

November

Average price

$209

Good round-trip deal

$254 or less

Good one-way deal

$208 or less
Provider with most accurate pricing for Knoxville McGhee Tyson-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Washington, D.C. (WAS) flights.
Search Deals
From Knoxville McGhee Tyson to Washington, D.C. (WAS)
Search Deals
One-way flight from Knoxville McGhee Tyson to Washington, D.C. (WAS)
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Knoxville McGhee Tyson to Washington, D.C. (WAS).
Search Deals
Price to beat on a one-way flight from Knoxville McGhee Tyson to Washington, D.C. (WAS).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Knoxville to Washington, D.C. that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 14, 2025.
Use the filters below to find and compare flights from Knoxville to Washington, D.C. that are best for you.

Fly from

Knoxville

Fly to

Washington, D.C.

Route

Depart

Return

Price

KnoxvilleBaltimore

TYS - BWI

TYSBWI

Knoxville McGhee Tyson

Wed 12/10

6:09 pm-9:22 am

1 stop15h 13m

Baltimore/Washington

Wed 12/17

11:16 am-12:32 pm

1 stop25h 16m

$179

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Sat 12/6

7:25 pm-9:08 pm

Nonstop1h 43m

Washington, D.C. Dulles Intl

Wed 12/10

9:00 am-10:48 am

Nonstop1h 48m

$183

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Mon 1/5

4:28 pm-6:06 pm

Nonstop1h 38m

Washington, D.C. Reagan-National

Mon 1/12

7:47 pm-9:44 pm

Nonstop1h 57m

$183

KnoxvilleBaltimore

TYS - BWI

TYSBWI

Knoxville McGhee Tyson

Tue 12/9

5:40 am-11:14 am

1 stop5h 34m

Baltimore/Washington

Tue 12/16

8:04 am-2:52 pm

1 stop6h 48m

$183

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Wed 12/10

7:25 pm-9:08 pm

Nonstop1h 43m

Washington, D.C. Dulles Intl

Wed 12/17

9:00 am-10:48 am

Nonstop1h 48m

$183

KnoxvilleBaltimore

TYS - BWI

TYSBWI

Knoxville McGhee Tyson

Wed 12/10

5:40 am-9:18 am

1 stop3h 38m

Baltimore/Washington

Tue 12/16

7:02 am-1:44 pm

1 stop6h 42m

$183

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Thu 2/12

7:25 pm-9:11 pm

Nonstop1h 46m

Washington, D.C. Dulles Intl

Sat 2/14

1:20 pm-3:15 pm

Nonstop1h 55m

$183

KnoxvilleBaltimore

TYS - BWI

TYSBWI

Knoxville McGhee Tyson

Tue 12/9

5:40 am-9:18 am

1 stop3h 38m

Baltimore/Washington

Wed 12/17

8:04 am-2:52 pm

1 stop6h 48m

$183

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Mon 3/2

7:25 pm-9:11 pm

Nonstop1h 46m

Washington, D.C. Dulles Intl

Wed 3/4

9:00 am-10:49 am

Nonstop1h 49m

$183

KnoxvilleBaltimore

TYS - BWI

TYSBWI

Knoxville McGhee Tyson

Tue 3/10

5:30 am-11:07 am

1 stop5h 37m

Baltimore/Washington

Wed 3/11

6:00 am-11:07 am

1 stop5h 07m

$183

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/13

Showing 1-10 of 55 results
1
2
3
...
6

Compare providers for flights from Knoxville to Washington, D.C.

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Knoxville to Washington, D.C. in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Knoxville-Washington, D.C. flights, users find the pricing of Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on Knoxville-Washington, D.C. flight deals on Cheapflights vs. Mytrip >95% of the time. Price accuracy is based on data collected from Knoxville-Washington, D.C. flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Knoxville-Washington, D.C. flights, Cheapflights users trust Mytrip the most. Mytrip has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Knoxville-Washington, D.C. flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Knoxville to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Knoxville with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Knoxville to Washington, D.C.

How far ahead should I book a flight from Knoxville to Washington, D.C.?

Use this chart to determine the optimal time to book a round-trip flight from Knoxville to Washington, D.C.. Price data was last updated on November 7, 2025.

Booking 75 days in advance of your planned departure date is, on average, the best time to get cheap flights from Knoxville to Washington, D.C.. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Knoxville to Washington, D.C.?

Currently, October is the cheapest month in which you can book a flight from Knoxville to Washington, D.C. (average of $44). Flying from Knoxville to Washington, D.C. in April is currently the most expensive (average of $213). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from TYS to WAS?

Find hourly flight availability from Knoxville to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 14, 2025.

It’s typically best to fly out from Knoxville to Washington, D.C. in the morning. Doing so could potentially save you 31% on the flight price compared to flying in the evening, which is usually more expensive.

What is the cheapest day to fly from Knoxville to Washington, D.C.?

Use this chart to determine the cheapest time to fly round-trip from Knoxville to Washington, D.C.. Price data was last updated on November 2, 2025.

Travelers seeking maximum savings on their Knoxville to Washington, D.C. flight should consider departing on Friday afternoons when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Knoxville to Washington, D.C.

Explore weekly flight availability from Knoxville to Washington, D.C.. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 14, 2025.

The most flights from TYS to WAS are scheduled on a Monday (22 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (19 on average).

How much does it cost to fly round-trip from Knoxville to Washington, D.C.?

What’s the top layover airport for flights from Knoxville to Washington, D.C.?

Share of 1-stop round-trip flights from Knoxville to Washington, D.C. chosen by Cheapflights users in the past 12 months, using the same layover each way.

Chicago (ORD) – chosen by Cheapflights users on 50% of 1-stop itineraries from Knoxville to Washington, D.C. on Cheapflights.

What’s the cheapest layover airport for flights from Knoxville to Washington, D.C.?

Average round-trip fare for 1-stop flights from Knoxville to Washington, D.C., chosen by Cheapflights users in the past 12 months, with the same layover each way.

Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $200.

What’s the fastest layover option from Knoxville to Washington, D.C.?

Shortest average travel time for 1-stop one-way flights from Knoxville to Washington, D.C., based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Chicago (ORD) have the shortest average one-way travel time for 1-stop routes: 5h 11m.

Which airport typically offers the quickest layover for flights from Knoxville to Washington, D.C.?

Average layover duration for 1-stop one-way flights from Knoxville to Washington, D.C., chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 1h 42m.

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington, D.C.. Reviews last updated November 14, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from Knoxville to Washington, D.C. have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,006 reviews

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,006 reviews
Delta
7.9
Good
8,006 reviews

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,016 reviews
Delta
7.9
Good
8,006 reviews

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,050 reviews
Delta
7.9
Good
8,006 reviews

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Allegiant Air
7.2
Good
698 reviews
Delta
7.9
Good
8,006 reviews

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Knoxville to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Knoxville to Washington, D.C.?

    If you book a flight to Washington, D.C. from Knoxville, you will be flying from McGhee Tyson, which is the city’s only airport. Knoxville McGhee Tyson (TYS) is located 11.3 mi from the center of Knoxville. There are 20 flights from McGhee Tyson to Washington, D.C. per day from 4 different airlines.

  • How long is the flight from Knoxville to Washington, D.C.?

    For as low as $183, United Airlines can have you in Washington, D.C. from Knoxville in 1h 38m. The distance from Knoxville to Washington, D.C. is about 436 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Knoxville to Washington, D.C. round-trip?

    Our cheapest airline available from Knoxville to Washington, D.C. is Allegiant Air. Our recent data shows that you can find tickets from as low as $43 on this airline. Additional options worth looking into are Delta and American Airlines, starting at $132 and $189 round-trip. Allegiant Air is priced at 84% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Knoxville to Washington, D.C. one-way?

    One-way options have recently been found by users for as low as $46 on Allegiant Air. Other airlines that offer cheap prices include United Airlines from $92 and American Airlines from $92 one-way.

  • What are the most popular routes from Knoxville to Washington, D.C.?

    Most travelers choose Knoxville McGhee Tyson - Washington, D.C. Dulles Intl, Knoxville McGhee Tyson - Washington, D.C. Reagan-National or Knoxville McGhee Tyson - Baltimore/Washington when deciding on the best route from Knoxville to Washington, D.C..

  • What are the most reliable airlines from Knoxville to Washington, D.C.?

    The top 3 most reliable airlines when flying from Knoxville to Washington, D.C. are CommutAir (93%), United Airlines (93%) and Copa Airlines (93%).

  • What are the cheapest flights from Knoxville to Washington, D.C.?

    While on average a flight from Knoxville to Washington, D.C. is generally $1,493, our data shows the cheapest flight currently is $46. When looking at the most popular route, (Knoxville McGhee Tyson - Washington, D.C. Dulles Intl), you can expect to pay $83 for that flight.

  • Can I find deals for flights from Knoxville to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Knoxville to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Knoxville to Washington, D.C.?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Knoxville to Washington, D.C..

  • Can I find deals for business class flights from Knoxville to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Knoxville to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Knoxville to Washington, D.C.?

    Currently, October is the cheapest month in which you can book a flight from Knoxville to Washington, D.C. (average of $44). Flying from Knoxville to Washington, D.C. in April is currently the most expensive (average of $213). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Tysons
Woodbridge
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Linthicum Heights
Manassas
Laurel
Towson
National Harbor
Waldorf
Bowie
Largo
McLean

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 4 airlines flying from Knoxville to Washington, D.C.

Discover the top 4 airlines that operate flights from Knoxville to Washington, D.C.. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$43Average$90FlexibilityNo cancel feeOn-time88%
DeltaCheapest$132Average$249FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$189Average$303FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$195Average$338FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
Cookie settings©2025 Cheapflights