diff --git a/application/controllers/Logbookadvanced.php b/application/controllers/Logbookadvanced.php
index 62e561667..30c9a0c19 100644
--- a/application/controllers/Logbookadvanced.php
+++ b/application/controllers/Logbookadvanced.php
@@ -161,7 +161,8 @@ class Logbookadvanced extends CI_Controller {
 			'qrzReceived' => xss_clean($this->input->post('qrzReceived')),
 			'distance' => xss_clean($this->input->post('distance')),
 			'sortcolumn' => xss_clean($this->input->post('sortcolumn')),
-			'sortdirection' => xss_clean($this->input->post('sortdirection'))
+			'sortdirection' => xss_clean($this->input->post('sortdirection')),
+			'duration' => xss_clean($this->input->post('duration'))
 		);
 	}
 
@@ -394,7 +395,8 @@ class Logbookadvanced extends CI_Controller {
 			'ids' => json_decode(xss_clean($this->input->post('ids'))),
 			'qsoids' => xss_clean($this->input->post('qsoids')),
 			'sortcolumn' => 'qsotime',
-			'sortdirection' => 'desc'
+			'sortdirection' => 'desc',
+			'duration' => '*'
 		);
 
 		$result = $this->logbookadvanced_model->getSearchResultArray($searchCriteria);
@@ -622,6 +624,7 @@ class Logbookadvanced extends CI_Controller {
 		$json_string['frequency']['show'] = $this->def_boolean($this->input->post('frequency'));
 		$json_string['dcl']['show'] = $this->def_boolean($this->input->post('dcl'));
 		$json_string['last_modification']['show'] = $this->def_boolean($this->input->post('last_modification'));
+		$json_string['duration']['show'] = $this->def_boolean($this->input->post('duration'));
 
 		$obj['column_settings']= json_encode($json_string);
 
diff --git a/application/models/Logbookadvanced_model.php b/application/models/Logbookadvanced_model.php
index d2d249123..70b28d9f6 100644
--- a/application/models/Logbookadvanced_model.php
+++ b/application/models/Logbookadvanced_model.php
@@ -534,6 +534,11 @@ class Logbookadvanced_model extends CI_Model {
 			$conditions[] = "coalesce(COL_DISTANCE, '') = ''";
 		}
 
+		if ($searchCriteria['duration'] !== '*' && $searchCriteria['duration'] !== '') {
+			$conditions[] = "TIMESTAMPDIFF(MINUTE, COL_TIME_ON, COL_TIME_OFF) >= ?";
+			$binding[] = $searchCriteria['duration'];
+        }
+
 		if (($searchCriteria['propmode'] ?? '') == 'None') {
 			$conditions[] = "(trim(COL_PROP_MODE) = '' OR COL_PROP_MODE is null)";
 		} elseif ($searchCriteria['propmode'] !== '') {
diff --git a/application/views/logbookadvanced/index.php b/application/views/logbookadvanced/index.php
index 6e0521ed7..eff0a0601 100644
--- a/application/views/logbookadvanced/index.php
+++ b/application/views/logbookadvanced/index.php
@@ -128,6 +128,7 @@
             \"frequency\":{\"show\":\"true\"},
             \"dcl\":{\"show\":\"true\"},
             \"last_modification\":{\"show\":\"false\"},
+            \"duration\":{\"show\":\"false\"},
         }";
     }
     $current_opts = json_decode($options);
@@ -240,6 +241,10 @@
         echo "\nvar o_template = { last_modification: {show: 'false'}};";
         echo "\nuser_options={...user_options, ...o_template};";
     }
+	if (!isset($current_opts->duration)) {
+        echo "\nvar o_template = { duration: {show: 'false'}};";
+        echo "\nuser_options={...user_options, ...o_template};";
+    }
 
     foreach ($mapoptions as $mo) {
 	    if ($mo != null) {
@@ -506,6 +511,10 @@ $options = json_decode($options);
 									<div <?php if (($options->distance->show ?? "true") == "false") { echo 'style="display:none"'; } ?> class="mb-3 col-lg-2 col-md-2 col-sm-3 col-xl">
                                         <label class="form-label" for="distance"><?= __("Distance"); ?> <i class="fa fa-question-circle" aria-hidden="true" data-bs-toggle="tooltip" title="<?= __("Distance in kilometers. Search will look for distances greater than or equal to this value."); ?>"></i></label>
                                         <input onclick="this.select()" type="text" name="distance" class="form-control form-control-sm border border-secondary" value="*" placeholder="<?= __("Empty"); ?>">
+                                    </div>
+									<div <?php if (($options->duration->show ?? "true") == "false") { echo 'style="display:none"'; } ?> class="mb-3 col-lg-2 col-md-2 col-sm-3 col-xl">
+                                        <label class="form-label" for="duration"><?= __("Duration"); ?> <i class="fa fa-question-circle" aria-hidden="true" data-bs-toggle="tooltip" title="<?= __("Duration in minutes. Search will look for durations greater than or equal to this value."); ?>"></i></label>
+                                        <input onclick="this.select()" type="text" name="duration" class="form-control form-control-sm border border-secondary" value="*" placeholder="<?= __("Empty"); ?>">
                                     </div>
                                 </div>
 								<div class="row">
@@ -892,6 +901,9 @@ $options = json_decode($options);
                     </th>
                     <?php if (($options->datetime->show ?? "true") == "true") {
                         echo '<th>' . __("Date/Time") . '</th>';
+                    } ?>
+					 <?php if (($options->duration->show ?? "false") == "true") {
+                        echo '<th>' . __("Duration") . '</th>';
                     } ?>
                     <?php if (($options->last_modification->show ?? "false") == "true") {
                         echo '<th>' . __("Last modified") . '</th>';
diff --git a/application/views/logbookadvanced/useroptions.php b/application/views/logbookadvanced/useroptions.php
index 43ddf06cc..6c1618856 100644
--- a/application/views/logbookadvanced/useroptions.php
+++ b/application/views/logbookadvanced/useroptions.php
@@ -22,6 +22,12 @@
 						<label class="form-check-label" for="datetime"><?= __("Date/Time"); ?></label>
 					</div>
 				</div>
+				<div class="col-md-6 col-lg-4">
+					<div class="form-check">
+						<input class="form-check-input" name="duration" type="checkbox" id="duration" <?php if (($options->duration->show ?? "false") == "true") { echo 'checked'; } ?>>
+						<label class="form-check-label" for="duration"><?= __("Duration"); ?></label>
+					</div>
+				</div>
 				<div class="col-md-6 col-lg-4">
 					<div class="form-check">
 						<input class="form-check-input" name="de" type="checkbox" id="de" <?php if (($options->de->show ?? "true") == "true") { echo 'checked'; } ?>>
diff --git a/assets/js/sections/logbookadvanced.js b/assets/js/sections/logbookadvanced.js
index 49f9d65d0..2d1ef914b 100644
--- a/assets/js/sections/logbookadvanced.js
+++ b/assets/js/sections/logbookadvanced.js
@@ -63,6 +63,9 @@ function updateRow(qso) {
 	if ((user_options.datetime.show ?? 'true') == "true"){
 		cells.eq(c++).text(qso.qsoDateTime);
 	}
+	if ((user_options.duration.show ?? 'true') == "true"){
+		cells.eq(c++).text(qso.duration);
+	}
 	if ((user_options.last_modification.show ?? 'true') == "true"){
 		cells.eq(c++).text(qso.last_modified);
 	}
@@ -283,6 +286,9 @@ function loadQSOTable(rows) {
 				data.push(qso.qsoDateTime);
 			}
 		}
+		if ((user_options.duration.show ?? 'true') == "true"){
+			data.push(qso.duration);
+		}
 		if ((user_options.last_modification.show ?? 'true') == "true"){
 			data.push(qso.last_modified);
 		}
@@ -765,7 +771,8 @@ $(document).ready(function () {
 				qrzReceived: this.qrzReceived.value,
 				distance: this.distance.value,
 				sortcolumn: this.sortcolumn.value,
-				sortdirection: this.sortdirection.value
+				sortdirection: this.sortdirection.value,
+				duration: this.duration.value,
 			},
 			dataType: 'json',
 			success: function (data) {
@@ -1816,6 +1823,7 @@ function saveOptions() {
 			type: 'post',
 			data: {
 				datetime: $('input[name="datetime"]').is(':checked') ? true : false,
+				duration: $('input[name="duration"]').is(':checked') ? true : false,
 				last_modification: $('input[name="last_modification"]').is(':checked') ? true : false,
 				de: $('input[name="de"]').is(':checked') ? true : false,
 				dx: $('input[name="dx"]').is(':checked') ? true : false,
diff --git a/assets/js/sections/logbookadvanced_map.js b/assets/js/sections/logbookadvanced_map.js
index 753b5b96a..16ebfde7d 100644
--- a/assets/js/sections/logbookadvanced_map.js
+++ b/assets/js/sections/logbookadvanced_map.js
@@ -551,7 +551,8 @@ function getFormData(form) {
 		qrzReceived: form.qrzReceived.value,
 		distance: form.distance.value,
 		sortcolumn: form.sortcolumn.value,
-		sortdirection: form.sortdirection.value
+		sortdirection: form.sortdirection.value,
+		duration: form.duration.value
 	};
 }
 
diff --git a/src/QSLManager/QSO.php b/src/QSLManager/QSO.php
index c4b87d9ab..b5cdc8aba 100644
--- a/src/QSLManager/QSO.php
+++ b/src/QSLManager/QSO.php
@@ -11,6 +11,7 @@ class QSO
 {
 	private string $qsoID;
 	private string $qsoDateTime;
+	private string $duration;
 	private string $de;
 	private string $profilename;
 	private string $dx;
@@ -303,8 +304,19 @@ class QSO
 
 		$this->measurement_base = $measurement_base;
 
+		$this->duration = $this->calculateDuration($data['COL_TIME_ON'], $data['COL_TIME_OFF']);
+
 	}
 
+	function calculateDuration($start, $end) {
+		if ($start == null || $end == null) {
+			return '';
+		}
+		$start = new DateTime($start);
+		$end = new DateTime($end);
+		$interval = $end->diff($start);
+		return $interval->format('%H:%I:%S');
+	}
 	/**
 	 * @return string
 	 */
@@ -1310,6 +1322,7 @@ class QSO
 			'qth' => $this->qth,
 			'frequency' => $this->getFormattedFrequency(),
 			'last_modified' => $this->last_modified,
+			'duration' => $this->duration
 		];
 	}