Stobart Air, which operates the Aer Lingus Regional brand, is set to resume services from Shannon Airport from June.
The airline pulled out of Shannon just 11 weeks ago saying the airport "didn’t fit in with its strategic plan."
Stobart Air has now said that while its decision to close its Shannon base last January was difficult but necessary, the move allowed them look at Shannon from a different perspective.
While an official announcement is expected tomorrow it is known the company will recommence services on one of the three routes it operated up to January 5.
The link between Shannon and Birmingham will resume on June 18 and will operate six times a week.
Stobart Air says it believes that passenger demand is there and that, along with Shannon and Birmingham Airports, it will "make a major push to mobilise a positive passenger response on this new route".
Shannon Group plc has welcomed the news saying: “We are very pleased to welcome back Stobart Air on this route. This announcement is really positive news for Shannon and our passengers.”
When the Aer Lingus franchise partner closed its Shannon base, a total of 20 weekly flights to Birmingham, Bristol and Edinburgh were lost.