Cheapest return flights from Knoxville to Dublin in September from $681

AirHint found the following cheapest return flights from Knoxville (TYS) to Dublin (DUB) in September 2025 (see full year).

Return flights

13 Sep - 04 Oct Air Canada
11 Sep - 04 Oct Air France
05 Sep - 19 Sep Allegiant Air
19 Sep - 27 Sep United
20 Sep - 27 Sep Air Canada
25 Sep - 29 Sep Allegiant Air
19 Sep - 28 Sep United
24 Sep - 03 Oct Lufthansa
20 Sep - 28 Sep American Airlines

Also check the deals for one-way flights from Knoxville to Dublin in September.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Dublin

Cheap car rent in Dublin

Feel free to contact us with any feedback or request another flight research.