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Cheap Flights from Knoxville to Washington Dulles

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      Compare Knoxville to Washington Dulles flight deals

      Find the cheapest month or even day of the year to fly to Washington Dulles

      Book the best Washington Dulles fare with no extra fees

      Flight deals from Knoxville to Washington Dulles

      Looking for a cheap last-minute deal or the best return flight from Knoxville Airport to Washington Dulles Airport? If you want to travel next month, return fares start from Rs17,413. Find the lowest prices on one-way and return tickets right here.
      Washington D.C..Rs10,535 per passenger.Departing Thu, 22 Oct.One-way flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Thu, 22 Oct, arriving in Washington Dulles.Price includes taxes and charges.From Rs10,535, select.
      Washington D.C..Rs10,535 per passenger.Departing Thu, 5 Nov.One-way flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Thu, 5 Nov, arriving in Washington Dulles.Price includes taxes and charges.From Rs10,535, select.
      Washington D.C..Rs21,927 per passenger.Departing Thu, 1 Apr.One-way flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Thu, 1 Apr, arriving in Washington Dulles.Price includes taxes and charges.From Rs21,927, select.
      Washington D.C..Rs34,503 per passenger.Departing Wed, 30 Sep.One-way flight with Allegiant Air.Outbound indirect flight with Allegiant Air, departs from Knoxville on Wed, 30 Sep, arriving in Washington Dulles.Price includes taxes and charges.From Rs34,503, select.
      Washington D.C..Rs40,549 per passenger.Departing Thu, 10 Dec.One-way flight with Allegiant Air.Outbound indirect flight with Allegiant Air, departs from Knoxville on Thu, 10 Dec, arriving in Washington Dulles.Price includes taxes and charges.From Rs40,549, select.
      Washington D.C..Rs56,388 per passenger.Departing Tue, 29 Sep.One-way flight with United.Outbound direct flight with United departs from Knoxville on Tue, 29 Sep, arriving in Washington Dulles.Price includes taxes and charges.From Rs56,388, select.
      Washington D.C..Rs56,388 per passenger.Departing Sat, 19 Dec.One-way flight with United.Outbound direct flight with United departs from Knoxville on Sat, 19 Dec, arriving in Washington Dulles.Price includes taxes and charges.From Rs56,388, select.
      Washington D.C..Rs56,462 per passenger.Departing Sat, 9 Jan.One-way flight with United.Outbound direct flight with United departs from Knoxville on Sat, 9 Jan, arriving in Washington Dulles.Price includes taxes and charges.From Rs56,462, select.

      Find the cheapest month to fly from Knoxville to Washington Dulles

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Knoxville to Washington Dulles flights are currently cheapest in October.
      Sep
      from Rs34,503
      Oct
      from Rs10,535
      Nov
      from Rs10,535
      Dec
      from Rs40,549
      Jan
      from Rs56,462
      Feb
      Find prices
      Mar
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      Apr
      from Rs21,927
      May
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      Jun
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      Jul
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      Aug
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      Direct flights from Knoxville to Washington Dulles

      Air Canada
      Allegiant Air
      Avianca
      Brussels Airlines
      CommutAir
      Copa
      Ethiopian Airlines
      Lufthansa
      Mesa Airlines
      United

      Knoxville to Washington Dulles: Alternative routes

      Compare routes from Knoxville to Washington D.C. below. You may find an airport to fly into that's cheaper, faster, or easier than Washington Dulles.

      Washington Ronald Reagan

      5km from central Washington D.C.
      Closest
      from Rs31,478
      Search flights

      Washington Dulles

      37km from central Washington D.C.
      Cheapest
      from Rs10,535
      Search flights

      Baltimore Washington International

      44km from central Washington D.C.
      from Rs26,725
      Search flights

      Knoxville to Washington D.C.: Flight information

      The things to know before you go.
      Cheapest flight foundRs10,535
      Cheapest month to flyOctober
      Average flight time1 hr, 40 mins
      Most popular airlineUnited
      Average flights per week164

      Finding cheap flights from Knoxville to Washington Dulles: Frequently asked questions

      The best price we found for a return flight from Knoxville to Washington Dulles is Rs17,413. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
      1 hour and 40 minutes is the average flight time from Knoxville to Washington Dulles.
      United, Lufthansa and Copa fly direct from Knoxville to Washington Dulles.
      As of September 2026, there are 164 flights per week flying from Knoxville to Washington Dulles.
      The cheapest month to fly from Knoxville to Washington Dulles is usually October.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Knoxville Airport to Washington Dulles Airport on Thursday, 22 October 2026.
      Yes – the average flight time is 1 hour and 40 minutes.
      We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Washington Dulles but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

      We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Washington D.C. is around 40 days in advance, so don’t leave your flight to the last minute.

      Currently, Allegiant Air offers the cheapest flight tickets to Washington Dulles.

      Flying from Knoxville Airport (TYS) to Washington Dulles Airport (IAD): what you need to know

      • Take a direct flight from Knoxville Airport to Washington Dulles Airport and you'll be in the air for an average of 1 hour 40 minutes.

      • Knoxville and Washington DC are in the UTC-5 timezone. This means there's no time difference to consider.

      • Flights from TYS to IAD start from 05:40 — the earliest with United Airlines. The latest departure is at 19:35 with United Airlines. In total, there are 25 weekly Knoxville Airport to Washington Dulles Airport flights.

      • Arriving two hours before an international flight and one hour ahead of a domestic departure are golden rules for stress-free travel. Show up at the airport on time to board your TYS to IAD flight.

      • Flying during a peak time such as October? Public holidays and other high seasons can lead to longer queues and delays at airport checkpoints. Be extra cautious and arrive up to four hours before an international flight and two hours before domestic departures.

      • United has direct flights from Knoxville Airport to Washington Dulles Airport. Book with this popular carrier, then get ready to discover the sights in Washington DC — and maybe even more of the United States if your schedule allows.

      • The airline with the highest booking volume on this route is United.

      • United is the most punctual carrier offering TYS to IAD flights. A reliable 83.8% of its services on this route land as scheduled.

      How to find the cheapest flights from Knoxville Airport (TYS) to Washington Dulles Airport (IAD)

      • At the moment, Rs10,535 is the cheapest price we've seen for a one-way Knoxville Airport to Washington Dulles Airport flight. The best price for a return ticket is Rs17,413. Keep in mind that fares could change due to availability when booking.

      • To secure cheap tickets from TYS to IAD, book your journey two months ahead of your planned departure.

      • The cheapest month for flights from Knoxville Airport to Washington Dulles Airport is July. Use the 'Whole month' tool to find the lowest prices if you have flexible travel dates.

      • Landing cheap flights from TYS to IAD is a breeze with Price Alerts. Simply set up one of these automatic alerts and we'll notify you when there's a better deal.

      • Tailor your trip using filters. Pick your departure and arrival times, airlines and total journey duration. You can also sort the results by 'Best,' 'Cheapest' or 'Fastest' flights from Knoxville Airport to Washington Dulles Airport.

      Handy information about Knoxville Airport (TYS)

      • The address for TYS is 2055 Alcoa Highway.

      • When it comes to the on-time performance of Knoxville Airport, 76% of flights meet their scheduled arrival time.

      • To get to Knoxville Airport from central Knoxville, it'll take around 25 minutes by car. Of course, this depends on traffic conditions. It's approximately 24 kilometres from the airport to the city centre.

      • The journey on public transport will take about 50 minutes.

      • Looking for a convenient hotel near TYS? If you've booked an early flight from Knoxville Airport to Washington Dulles Airport, these accommodation options will have you moments from your departure lounge:

      Arriving at Washington Dulles Airport (IAD)

      When to fly to Washington Dulles Airport (IAD)

      • The quietest month for a flight from Knoxville Airport to Washington Dulles Airport is February, while July is the busiest. Choose the best time to visit Washington DC based on whether you prefer a laid-back vibe or a more bustling atmosphere.

      • Lock in your flight from Knoxville Airport to Washington Dulles Airport for July if you want to explore Washington DC during its warmest month. You can expect temperatures of between 19ºC and 33ºC.

      • If you like travelling in cooler conditions, look for a cheap ticket from TYS to IAD in January. Average temperatures are between -6ºC and 10ºC then.

      Explore more of the United States

      • Washington DC has loads to offer, but there are so many other corners of the United States you'll want to see. Around 322 kilometres north-east of Washington DC, a trip to New York will keep your itinerary packed. Start with leading sights like Central Park, Statue of Liberty and Metropolitan Museum of Art.

      • If there's time to check out another side of the United States, consider Philadelphia, roughly 193 kilometres north-east of Washington DC. Independence Hall, Liberty Bell and Philadelphia Museum of Art are key highlights.

      Plan the rest of your trip from Knoxville to Washington D.C.

      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.