$686 Cheap Flights from Sofia (SOF) to Knoxville (TYS)

View $686 flight on Wed, Sep 24, 2025Opens in a new window

Popular airlines from Sofia Airport (SOF) to McGhee Tyson Airport (TYS)

Cheap Flights from Sofia to Knoxville (SOF-TYS)

Prices were available within the past 7 days and start at $686 for one-way flights and $681 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Oct 17 - Wed, Oct 29
SOF
Sofia
TYS
Knoxville
$681 Roundtrip, found 3 days ago
$681
Roundtrip
found 3 days ago
Select United flight, departing Fri, Oct 17 from Sofia to Knoxville, returning Wed, Oct 29, priced at $681 found 3 days ago
United
Tue, Sep 16 - Mon, Oct 6
SOF
Sofia
TYS
Knoxville
$684 Roundtrip, found 3 days ago
$684
Roundtrip
found 3 days ago
Select United flight, departing Tue, Sep 16 from Sofia to Knoxville, returning Mon, Oct 6, priced at $684 found 3 days ago
United
Tue, Sep 16 - Wed, Oct 1
SOF
Sofia
TYS
Knoxville
$686 Roundtrip, found 3 days ago
$686
Roundtrip
found 3 days ago
Select United flight, departing Tue, Sep 16 from Sofia to Knoxville, returning Wed, Oct 1, priced at $686 found 3 days ago
United
Sun, Oct 19 - Wed, Oct 29
SOF
Sofia
TYS
Knoxville
$694 Roundtrip, found 3 days ago
$694
Roundtrip
found 3 days ago
Select United flight, departing Sun, Oct 19 from Sofia to Knoxville, returning Wed, Oct 29, priced at $694 found 3 days ago
United
Mon, Sep 15 - Tue, Sep 30
SOF
Sofia
TYS
Knoxville
$696 Roundtrip, found 3 days ago
$696
Roundtrip
found 3 days ago
Select United flight, departing Mon, Sep 15 from Sofia to Knoxville, returning Tue, Sep 30, priced at $696 found 3 days ago
United
Mon, Sep 15 - Thu, Oct 2
SOF
Sofia
TYS
Knoxville
$698 Roundtrip, found 3 days ago
$698
Roundtrip
found 3 days ago
Select United flight, departing Mon, Sep 15 from Sofia to Knoxville, returning Thu, Oct 2, priced at $698 found 3 days ago
Lufthansa
Thu, Oct 16 - Wed, Oct 29
SOF
Sofia
TYS
Knoxville
$702 Roundtrip, found 3 days ago
$702
Roundtrip
found 3 days ago
Select Lufthansa flight, departing Thu, Oct 16 from Sofia to Knoxville, returning Wed, Oct 29, priced at $702 found 3 days ago
American Airlines
Sun, Oct 19 - Sun, Nov 2
SOF
Sofia
TYS
Knoxville
$741 Roundtrip, found 3 days ago
$741
Roundtrip
found 3 days ago
Select American Airlines flight, departing Sun, Oct 19 from Sofia to Knoxville, returning Sun, Nov 2, priced at $741 found 3 days ago
British Airways
Fri, Oct 10 - Thu, Oct 23
SOF
Sofia
TYS
Knoxville
$779 Roundtrip, found 3 days ago
$779
Roundtrip
found 3 days ago
Select British Airways flight, departing Fri, Oct 10 from Sofia to Knoxville, returning Thu, Oct 23, priced at $779 found 3 days ago
KLM
Mon, Oct 20 - Sun, Nov 9
SOF
Sofia
TYS
Knoxville
$816 Roundtrip, found 3 days ago
$816
Roundtrip
found 3 days ago
Select KLM flight, departing Mon, Oct 20 from Sofia to Knoxville, returning Sun, Nov 9, priced at $816 found 3 days ago

Alternative airports near Knoxville

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to McGhee Tyson TYS. Cheapest and Closest option available. Average driving time to city center is 22 minutes. Flights from $832
TYS
McGhee Tyson
CheapestClosest
Average driving time to city center22 min
Flights from $832
Flights from Sofia (SOF) to Knoxville (TYS)
Origin airport
Sofia
Destination airport
McGhee Tyson
Roundtrip price
$681
Distance
5346 mi

Sofia to Knoxville Flights

The cheapest times to fly from Sofia to Knoxville

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Sofia to Knoxville are during the month of October. You can find some of the cheapest flights from Sofia to Knoxville with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Sofia to Knoxville

Sunday is one of the best days to book for cheap flights from Sofia to Knoxville: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Sofia to Knoxville

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Sofia to Knoxville in 2025. You can also book with separate airlines for your outbound and return journeys, from $686 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Sofia to Knoxville flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Sofia to Knoxville airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Sofia Airport (SOF) to McGhee Tyson Airport (TYS) cost?
Discover the latest flight deals from SOF to TYS by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SOF to TYS?
The cheapest flights from SOF to TYS are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SOF to TYS?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SOF to TYS. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Sofia Airport (SOF) to McGhee Tyson Airport (TYS)?
Direct flights from Sofia Airport (SOF) to McGhee Tyson Airport (TYS) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SOF to TYS?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can vary based on a range of factors, including the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sofia Airport (SOF) to McGhee Tyson Airport (TYS)?
To arrive at McGhee Tyson Airport (TYS) on schedule, choose a flight that leaves Sofia Airport (SOF) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Sofia Airport (SOF) to McGhee Tyson Airport (TYS) last-minute?
Last-minute bookings from SOF to TYS are generally more expensive. To secure the cheapest rates, start looking for flights ahead of time. That said, if you're flexible with your travel plans, it's possible to score a cheap fare just before your departure.
Is it cheaper to book a SOF to TYS flight and hotel package?
Compared with arranging hotels and flights separately, booking a SOF to TYS flight and hotel package with Expedia could result in significant savings. What's more, having it all in one place will take the hassle out of travel planning. Simply secure your flights and select from our wide range of hotels, then customize your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Sofia Airport (SOF) to McGhee Tyson Airport (TYS)?
If you booked your SOF to TYS flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more details.

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*Available to One Key members.