As of today, United Airlines does not have a codeshare agreement with Aer Lingus. However, there is speculation that the two airlines could partner in the future.
United Airlines is a global airline with a large network of routes. Aer Lingus is a smaller airline with a strong presence in the transatlantic market. A partnership between the two airlines could provide United Airlines with access to new markets and Aer Lingus with more global reach. However, there is no official announcement from the two airlines regarding a potential partnership.
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