Narrative:

Roughly 10-12 miles from runway X; ZZZ approach directed us to switch to the tower frequency after clearing us for a visual approach. The pilot not flying; my captain; switched the pre-dialed in frequency for the tower and called. I do not remember hearing a response as we continued our pre-landing checklist.as pilot flying I was focusing on hand-flying the precision approach and responding to this pre-landing checklist. Due to the recent slowdown in flying; I felt it prudent that I hand-fly this precision approach to keep my skills up. All of my attention was on the flying.in the past month I have flown less than 15 hours and then only very sporadically. The last day of flying prior to today was over two weeks ago and was with the same captain.the landing was uneventful and as we were exiting the runway; the pilot not flying called 'clear of runway X at taxiway.' we did not hear a response. Pilot not flying tried again; and it was at this moment I realized that we were not on the correct tower frequency and dialed in the correct frequency.pilot not flying had mistakenly dialed in ZZZ1 tower frequency instead of ZZZ frequency. We realized that we had landed without a landing clearance. We promptly contacted the tower and admitted our mistake.I believe the contributing factors in this event were lack of recent flying + landing at night after a long day and a long flight.corrective actions for this would be to pay closer attention to radio calls by pilot not flying while acting as pilot flying and to ensure that we are given proper landing clearance before commencing landing. It is especially important to be extra vigilant when you are not as current as you are normally.

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Original NASA ASRS Text

Title: Flight crew reported landing without clearance due to fatigue and lack of recent flying assignments due to COVID-19-related decrease in flights.

Narrative: Roughly 10-12 miles from Runway X; ZZZ Approach directed us to switch to the tower frequency after clearing us for a visual approach. The Pilot not Flying; my Captain; switched the pre-dialed in frequency for the Tower and called. I do not remember hearing a response as we continued our pre-landing checklist.As Pilot Flying I was focusing on hand-flying the precision approach and responding to this pre-landing checklist. Due to the recent slowdown in flying; I felt it prudent that I hand-fly this precision approach to keep my skills up. All of my attention was on the flying.In the past month I have flown less than 15 hours and then only very sporadically. The last day of flying prior to today was over two weeks ago and was with the same Captain.The landing was uneventful and as we were exiting the runway; the Pilot Not Flying called 'Clear of Runway X at taxiway.' We did not hear a response. Pilot Not Flying tried again; and it was at this moment I realized that we were not on the correct Tower frequency and dialed in the correct frequency.Pilot Not Flying had mistakenly dialed in ZZZ1 Tower Frequency instead of ZZZ Frequency. We realized that we had landed without a landing clearance. We promptly contacted the tower and admitted our mistake.I believe the contributing factors in this event were lack of recent flying + landing at night after a long day and a long flight.Corrective actions for this would be to pay closer attention to radio calls by Pilot Not Flying while acting as Pilot Flying and to ensure that we are given proper landing clearance before commencing landing. It is especially important to be extra vigilant when you are not as current as you are normally.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.