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Knoxville

$40+ Cheap flights from Dulles Intl (IAD) to Knoxville (TYS)

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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — TYS
Aug 2 — Aug 91
Sat 8/2
Sat 8/9
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Knoxville McGhee Tyson are usually found in May or July, booked 75 days in advance, depart on a Monday or Wednesday and return on a Tuesday

Cheap flight deals from Dulles Intl to Knoxville

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Knoxville (TYS). 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 July 28, 2025.

Round-trip from

$94
(Kiwi.com)

One-way from

$40
(Mytrip)

Popular in

October

Cheapest in

May

Average price

$259

Good round-trip deal

$90 or less

Good one-way deal

$50 or less
From Washington, D.C. Dulles Intl to Knoxville McGhee Tyson
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One-way flight from Washington, D.C. Dulles Intl to Knoxville McGhee Tyson
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Highest demand for flights based on searches. 17% potential increase in price ($77 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Knoxville McGhee Tyson.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Knoxville McGhee Tyson.
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Find flight deals from Dulles Intl to Knoxville

Cheapest flights from Dulles Intl to Knoxville
Explore the most affordable flight options available from Dulles Intl to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/153:13 pmIAD - TYS
Nonstop1h 34mAllegiant Air
Fri 8/2212:45 pmTYS - IAD
Nonstop1h 38mAllegiant Air
Deal found 7/27$94
This United Airlines deal was found by Cheapflights users on 7/28. 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.
Fri 8/2910:11 pmIAD - TYS
Nonstop1h 46mUnited Airlines
Sun 8/315:45 amTYS - IAD
Nonstop1h 43mUnited Airlines
Deal found 7/28$189
This Mytrip deal was found by Cheapflights users on 7/25. 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 8/188:30 amIAD - TYS
1 stop12h 40mMultiple Airlines
Mon 8/2512:45 pmTYS - IAD
Nonstop1h 38mMultiple Airlines
Deal found 7/25$190
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/206:00 amIAD - TYS
1 stop3h 30mDelta
Sun 8/245:45 amTYS - IAD
1 stop3h 27mDelta
Deal found 7/28$209
This American Airlines deal was found by Cheapflights users on 7/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/37:21 pmIAD - TYS
1 stop3h 42mAmerican Airlines
Thu 10/95:00 amTYS - IAD
1 stop3h 54mAmerican Airlines
Deal found 7/25$269

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Knoxville 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 July 28, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Knoxville that are best for you.

Fly from

Dulles Intl

Fly to

Knoxville

Route

Depart

Return

Price

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Fri 8/15

3:13 pm-4:47 pm

Nonstop1h 34m

Knoxville McGhee Tyson

Fri 8/22

12:45 pm-2:23 pm

Nonstop1h 38m

$94

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Fri 8/29

10:11 pm-11:57 pm

Nonstop1h 46m

Knoxville McGhee Tyson

Sun 8/31

5:45 am-7:28 am

Nonstop1h 43m

$189

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Mon 8/18

8:30 am-9:10 pm

1 stop12h 40m

Knoxville McGhee Tyson

Mon 8/25

12:45 pm-2:23 pm

Nonstop1h 38m

$190

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Wed 8/20

6:00 am-9:30 am

1 stop3h 30m

Knoxville McGhee Tyson

Sun 8/24

5:45 am-9:12 am

1 stop3h 27m

$209

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Fri 10/3

7:21 pm-11:03 pm

1 stop3h 42m

Knoxville McGhee Tyson

Thu 10/9

5:00 am-8:54 am

1 stop3h 54m

$269

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Mon 8/4

3:13 pm-4:47 pm

Nonstop1h 34m

$40

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sat 8/30

6:00 am-10:27 am

1 stop4h 27m

$100

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sat 9/6

8:45 am-10:28 am

Nonstop1h 43m

$116

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sun 8/31

6:34 am-10:30 am

1 stop3h 56m

$140

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sun 8/24

4:56 pm-5:38 pm

2 stops24h 42m

$141

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/26

Best time to book a flight from Dulles Intl to Knoxville

Have a flexible travel schedule? Discover the best time to fly to Knoxville from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Knoxville

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

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Knoxville. Price data was last updated on July 25, 2025.

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Knoxville may vary depending on when you book. For the best chance of a lower fare, look to book 74 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Knoxville (average of $295). Flying from Washington, D.C. Dulles Intl Airport to Knoxville in March is currently the most expensive (average of $376). 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 IAD to TYS?

Find hourly flight availability from Dulles Intl to Knoxville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 28, 2025.

It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to Knoxville in the afternoon. Doing so could potentially save you 66% on the flight price compared to flying at noon, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Knoxville. Price data was last updated on July 27, 2025.

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

Weekly flight availability from Washington, D.C. Dulles Intl Airport to Knoxville

Explore weekly flight availability from Dulles Intl to Knoxville. 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 July 28, 2025.

The most flights from IAD to TYS are scheduled on a Monday (17 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (16 on average).

Reviews of airlines servicing Knoxville

Get insights into the airlines that provide service to Knoxville. 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 Knoxville. Reviews last updated July 28, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from Washington, D.C. Dulles Intl Airport to Knoxville. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,971 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,971 reviews
Delta
8.0
Very good
7,971 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,893 reviews
Delta
8.0
Very good
7,971 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,971 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Allegiant Air
7.2
Good
702 reviews
Delta
8.0
Very good
7,971 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Knoxville. 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 into for flights to Knoxville from Washington, D.C. Dulles Intl?

    Located just 11.3 mi from the city center, Knoxville McGhee Tyson is the airport most travelers will use when flying to Knoxville from Washington, D.C. Dulles Intl. Booking flights from Washington, D.C. Dulles Intl to McGhee Tyson (TYS) should be relatively easy as there are 16 daily inbound flights from Washington, D.C. Dulles Intl from 2 different airlines.

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

    According to our current data, Allegiant Air ($94), United Airlines ($189), and Delta ($209) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to Knoxville. Users have found that Allegiant Air is 74% cheaper than the other options available to this destination.

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

    To fly one-way, consider booking your trip with Allegiant Air, which is currently one of the cheapest options available, starting at $40. Delta flights start at $100 while deals on United Airlines start at $116 one-way.

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

    No one likes to see their flight delayed. When booking a flight from Washington, D.C. Dulles Intl Airport to Knoxville consider choosing Allegiant Air (75%), Avianca (69%) or Copa Airlines (69%) as they are the most reliable in getting you off to your destination on time.

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

    On average you can expect to pay $162 for a flight from Washington, D.C. Dulles Intl Airport to Knoxville. The cheapest flight overall is $40 while the most popular route, (Washington, D.C. Dulles Intl - Knoxville McGhee Tyson) is currently priced at $83.

  • Can I find deals for flights from Dulles Intl to Knoxville that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Knoxville flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Knoxville?

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

  • Can I find deals for business class flights from Dulles Intl to Knoxville?

    Yes. Cheapflights offers flight deals from Dulles Intl to Knoxville 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 Washington, D.C. Dulles Intl Airport to Knoxville?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Knoxville (average of $295). Flying from Washington, D.C. Dulles Intl Airport to Knoxville in March is currently the most expensive (average of $376). 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 Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Morristown
Corbin
Cherokee
Alcoa
Oak Ridge
Murphy

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Top 2 airlines flying from Dulles Intl to Knoxville

Discover the top 2 airlines that operate flights from Dulles Intl to Knoxville. 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 July 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$38Average$83FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$238Average$385FlexibilityNo cancel feeOn-time69%

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