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When flying from Duluth to Appleton, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
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Useful info, stats and facts about Duluth to Appleton flights.
These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Duluth Intl Airport to Appleton Outagamie County Airport flight would often be abbreviated as a DLH to ATW flight.