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Dulles Intl

$43+ 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 6/27. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — IAD
Jun 24 — Jul 11
Tue 6/24
Tue 7/1
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 June, booked 41 days in advance, depart on a Tuesday or Wednesday 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 June 19, 2025.

Round-trip from

$147
(Mytrip)

One-way from

$43
(Booking.com)

Popular in

November

Cheapest in

January

Average price

$266

Good round-trip deal

$404 or less

Good one-way deal

$243 or less
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. 11% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 19, 2025.

This Mytrip deal was found by Cheapflights users on 6/18. 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.
Fri 7/181:12 pmTYS - IAD
1 stop4h 51mAllegiant Air
Fri 7/253:13 pmIAD - TYS
Nonstop1h 34mAllegiant Air
Deal found 6/18$147
This United Airlines deal was found by Cheapflights users on 6/17. 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 7/125:45 amTYS - IAD
Nonstop1h 41mUnited Airlines
Tue 7/151:20 pmIAD - TYS
Nonstop1h 38mUnited Airlines
Deal found 6/17$189
This Mytrip deal was found by Cheapflights users on 6/17. 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.
Fri 7/1812:45 pmTYS - IAD
Nonstop1h 38mMultiple Airlines
Sun 7/2011:58 amIAD - TYS
2 stops22h 13mMultiple Airlines
Deal found 6/17$203
This Delta deal was found by Cheapflights users on 6/19. 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.
Sun 8/245:45 amTYS - IAD
1 stop3h 27mDelta
Sat 9/66:00 amIAD - TYS
1 stop4h 27mDelta
Deal found 6/19$209
This American Airlines deal was found by Cheapflights users on 6/19. 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.
Thu 9/115:05 amTYS - IAD
1 stop3h 41mAmerican Airlines
Sun 9/148:13 pmIAD - TYS
1 stop3h 56mAmerican Airlines
Deal found 6/19$269

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 June 19, 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

Fri 7/18

1:12 pm-6:03 pm

1 stop4h 51m

Washington, D.C. Dulles Intl

Fri 7/25

3:13 pm-4:47 pm

Nonstop1h 34m

$147

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Sat 7/12

5:45 am-7:26 am

Nonstop1h 41m

Washington, D.C. Dulles Intl

Tue 7/15

1:20 pm-2:58 pm

Nonstop1h 38m

$189

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Fri 7/18

12:45 pm-2:23 pm

Nonstop1h 38m

Washington, D.C. Dulles Intl

Sun 7/20

11:58 am-10:11 am

2 stops22h 13m

$203

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Sun 8/24

5:45 am-9:12 am

1 stop3h 27m

Washington, D.C. Dulles Intl

Sat 9/6

6:00 am-10:27 am

1 stop4h 27m

$209

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Thu 9/11

5:05 am-8:46 am

1 stop3h 41m

Washington, D.C. Dulles Intl

Sun 9/14

8:13 pm-12:09 am

1 stop3h 56m

$269

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Fri 6/27

12:45 pm-2:23 pm

Nonstop1h 38m

$43

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Tue 8/5

7:52 pm-11:58 pm

1 stop4h 06m

$126

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Sat 7/19

6:08 pm-11:08 am

2 stops17h 00m

$147

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Thu 7/10

7:00 am-11:55 am

1 stop4h 55m

$224

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Fri 7/18

5:12 pm-10:55 pm

1 stop5h 43m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/18

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 June 13, 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 41 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 July is currently the most expensive (average of $347). 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 June 19, 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 61% on your trip compared to booking a flight in the afternoon.

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

Explore weekly flight availability from Knoxville to Dulles Intl. 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 June 19, 2025.

The most flights from TYS to IAD are scheduled on a Tuesday (20 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (18 on average).

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 June 19, 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
7,964 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

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
7,964 reviews
Delta
8.0
Very good
7,964 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

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
8,818 reviews
Delta
8.0
Very good
7,964 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

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
7.3
Good
722 reviews
Delta
8.0
Very good
7,964 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

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
7,964 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

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 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 19 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 $147. Other airlines that can offer you cheap pricing are United Airlines, from $189, and Delta, from $209. These flights start at 55% 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 $43. Users have also found prices from $126 and $224 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 Allegiant Air (100%), Ethiopian Air (97%) and Copa Airlines (90%).

  • 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 $94. While the most popular route (Knoxville McGhee Tyson - Washington, D.C. Dulles Intl) can be booked for $80 on average our data indicates $1,595 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 July is currently the most expensive (average of $347). 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
Woodbridge
Alexandria
Tysons
Silver Spring
Linthicum Heights
Fredericksburg
Fairfax
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Easton
Towson
Manassas
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Rockville
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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 June 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$200Average$208FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$226Average$343FlexibilityNo cancel feeOn-time69%

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