Earn point on your loyalty program!arrow arc left

Cheap flights from Knoxville (TYS) to Sofia (SOF)

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

How to find the cheapest flight from Knoxville (TYS) to Sofia (SOF)

How to find the cheapest flight from Knoxville (TYS) to Sofia (SOF)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Knoxville (TYS) to Sofia (SOF)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Knoxville (TYS) to Sofia (SOF)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.

Cheap flights from Knoxville to Sofia in August , September 2026

24 Aug - 02 Oct $ 1,113.00
TYS
Knoxville
Allegiant Air
3 STOPS
SOF
Sofia
SOF
Sofia
Allegiant Air
3 STOPS
TYS
Knoxville
Pick dates
24 Aug - 04 Sep $ 1,204.00
TYS
Knoxville
Allegiant Air
3 STOPS
SOF
Sofia
SOF
Sofia
Allegiant Air
3 STOPS
TYS
Knoxville
Pick dates
24 Aug - 04 Sep $ 1,243.00
TYS
Knoxville
Allegiant Air
3 STOPS
SOF
Sofia
SOF
Sofia
Allegiant Air
3 STOPS
TYS
Knoxville
Pick dates

Last minute flights from Knoxville to Sofia

24 Aug - 02 Sep $ 1,577.00
TYS
Knoxville
Allegiant Air
3 STOPS
SOF
Sofia
SOF
Sofia
Allegiant Air
3 STOPS
TYS
Knoxville
Pick dates
23 Aug - 02 Sep $ 1,604.00
TYS
Knoxville
Allegiant Air
3 STOPS
SOF
Sofia
SOF
Sofia
Allegiant Air
3 STOPS
TYS
Knoxville
Pick dates
22 Aug - 02 Sep $ 1,606.00
TYS
Knoxville
Allegiant Air
3 STOPS
SOF
Sofia
SOF
Sofia
Allegiant Air
3 STOPS
TYS
Knoxville
Pick dates

One-way flights to Sofia from Knoxville

2:51 PM - 9:45 PM
Wizz Air
3 Stops
27h 44m
TYS - SOF
$ 574
Kiwi
Pick dates
2:51 PM - 10:20 PM
Wizz Air
3 Stops
25h 39m
TYS - SOF
$ 614
Kiwi
Pick dates
9:30 AM - 12:10 PM
Wizz Air
3 Stops
22h 40m
TYS - SOF
$ 624
Kiwi
Pick dates

How to find the cheapest flight from Knoxville (TYS) to Sofia (SOF)

Related info for your journey
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Knoxville (TYS) to Sofia (SOF)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Knoxville (TYS) to Sofia (SOF)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.