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Dulles Intl

$123+ Cheap flights from Knoxville (TYS) to Dulles Intl (IAD)

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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — IAD
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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Cheapflights Tip: The best prices from Knoxville McGhee Tyson to Washington, D.C. Dulles Intl are usually found in January or September, booked 71 days in advance, depart on a Wednesday or Thursday and return on a Monday

Cheap flight deals from Knoxville to Dulles Intl

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

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$247
(United Airlines)

One-way from

$123
(Mytrip)

Popular in

November

Cheapest in

January

Average price

$391

Good round-trip deal

$581 or less

Good one-way deal

$261 or less
Provider with most accurate pricing for Knoxville McGhee Tyson-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Washington, D.C. Dulles Intl flights.
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From Knoxville McGhee Tyson to Washington, D.C. Dulles Intl
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One-way flight from Knoxville McGhee Tyson to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 9% potential increase in price ($37 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Knoxville McGhee Tyson to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from Knoxville McGhee Tyson to Washington, D.C. Dulles Intl.
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Find flight deals from Knoxville to Dulles Intl

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

This United Airlines deal was found by Cheapflights users on 3/26. 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.
Sun 4/275:45 amTYS - IAD
Nonstop1h 45mUnited Airlines
Wed 4/308:20 amIAD - TYS
Nonstop1h 45mUnited Airlines
Deal found 3/26$247
This American Airlines deal was found by Cheapflights users on 3/26. 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.
Wed 4/169:05 amTYS - IAD
1 stop4h 37mAmerican Airlines
Sun 4/205:00 amIAD - TYS
1 stop5h 38mAmerican Airlines
Deal found 3/26$265
This Delta deal was found by Cheapflights users on 3/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/265:30 amTYS - IAD
1 stop5h 53mDelta
Sun 4/276:00 amIAD - TYS
1 stop6h 03mDelta
Deal found 3/27$267
This Mytrip deal was found by Cheapflights users on 3/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/167:15 amTYS - IAD
3 stops28h 11mMultiple Airlines
Sun 4/209:10 pmIAD - TYS
1 stop17h 17mMultiple Airlines
Deal found 3/27$283

Cheapflights Fare Finder

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

Fly from

Knoxville

Fly to

Dulles Intl

Route

Depart

Return

Price

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Sun 4/27

5:45 am-7:30 am

Nonstop1h 45m

Washington, D.C. Dulles Intl

Wed 4/30

8:20 am-10:05 am

Nonstop1h 45m

$247

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Wed 4/16

9:05 am-1:42 pm

1 stop4h 37m

Washington, D.C. Dulles Intl

Sun 4/20

5:00 am-10:38 am

1 stop5h 38m

$265

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Sat 4/26

5:30 am-11:23 am

1 stop5h 53m

Washington, D.C. Dulles Intl

Sun 4/27

6:00 am-12:03 pm

1 stop6h 03m

$267

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Wed 4/16

7:15 am-11:26 am

3 stops28h 11m

Washington, D.C. Dulles Intl

Sun 4/20

9:10 pm-2:27 pm

1 stop17h 17m

$283

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Mon 6/9

12:55 pm-6:15 pm

1 stop5h 20m

$123

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Sat 5/17

8:27 pm-12:02 am

1 stop3h 35m

$133

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Sat 5/17

5:50 am-7:35 am

Nonstop1h 45m

$153

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Mon 6/9

6:38 am-11:26 am

3 stops28h 48m

$188

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Sun 4/20

5:30 am-11:23 am

1 stop5h 53m

$250

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Compare providers for flights from Knoxville to Dulles Intl

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 Dulles Intl in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice 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. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Knoxville-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Knoxville-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub 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. Dulles Intl Airport 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 Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl 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. Dulles Intl Airport

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

Use this chart to determine the optimal time to book a round-trip flight from Knoxville to Dulles Intl. Price data was last updated on March 21, 2025.

To ensure you get the cheapest price possible for a flight from Knoxville to Washington, D.C. Dulles Intl Airport, you should look to book at least 69 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, August is the cheapest month in which you can book a flight from Knoxville to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Knoxville to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $385). 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 IAD?

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

A simple way to save on the total cost of your ticket is to fly from Knoxville to Washington, D.C. Dulles Intl Airport in the morning. If you’re flexible enough to do this you can expect to save up to 50% on your trip compared to booking a flight at noon.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated March 28, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines and Allegiant Air from Knoxville to Washington, D.C. to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,897 reviews
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,603 reviews
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Allegiant Air
7.3
Good
731 reviews
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Knoxville to Dulles Intl. 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. Dulles Intl?

    If you book a flight to Washington, D.C. Dulles Intl 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 9 flights from McGhee Tyson to Washington, D.C. Dulles Intl per day from 2 different airlines.

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

    Cheapflights users have booked flights from Knoxville to Washington, D.C. Dulles Intl Airport round-trip from $247. Other airlines that can offer you cheap pricing are American Airlines, from $265, and Delta, from $267. These flights start at 27% lower than the current average price 3 months from now.

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

    For one-way options, check prices for Allegiant Air. According to our data, you can fly for as low as $123. Users have also found prices from $133 and $153 on American Airlines and United Airlines, respectively.

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

    The top 3 most reliable airlines when flying from Knoxville to Washington, D.C. Dulles Intl Airport are Lufthansa (90%), CommutAir (89%) and United Airlines (89%).

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

    Looking at all options, your cheapest flight can be booked for $204. While the most popular route (Knoxville McGhee Tyson - Washington, D.C. Dulles Intl) can be booked for $86 on average our data indicates $2,050 when flying from Knoxville to Washington, D.C. Dulles Intl Airport.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Knoxville to Dulles Intl 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. Dulles Intl Airport?

    Currently, August is the cheapest month in which you can book a flight from Knoxville to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Knoxville to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $385). 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
Arlington
Alexandria
Fairfax
Tysons
Springfield
Rockville
Woodbridge
Gaithersburg
Fredericksburg
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Silver Spring
Falls Church
Laurel
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Gettysburg
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Oxon Hill

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Top 2 airlines flying from Knoxville to Dulles Intl

Discover the top 2 airlines that operate flights from Knoxville to Dulles Intl. 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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$208Average$208FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$239Average$349FlexibilityNo cancel feeOn-time69%
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