This workflow accesses a sample of data from the airline dataset and detects outlier airports based on the average arrival delay in them. The techniques applied are numeric outlier, z-score, DBSCAN and isolation forest. The outlier airports detected by each of these techniques are visualized on a map of US using the KNIME OSM integration.
Workflow 
Four Techniques for Outlier Detection
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Created with KNIME Analytics Platform version 4.3.3
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KNIME AG, Zurich, Switzerland
Version 4.3.3
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KNIME AG, Zurich, Switzerland
Version 4.3.1
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KNIME AG, Zurich, Switzerland
Version 4.3.3
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KNIME AG, Zurich, Switzerland
Version 4.3.0
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KNIME AG, Zurich, Switzerland
Version 4.3.0
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KNIME AG, Zurich, Switzerland
Version 4.3.0
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KNIME AG, Zurich, Switzerland
Version 4.3.3
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KNIME AG, Zurich, Switzerland
Version 4.3.3
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KNIME AG, Zurich, Switzerland
Version 4.3.0
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