FlyerTalk Forums - View Single Post - Is It Ever a Good Idea to Book With Expedia (et al.) Rather Than DL.com?
Old Jan 18, 2018 | 12:40 pm
  #8  
Duke787
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Across the board (DL, AA, UA) the biggest issue is typically just that there can be a fee for the airline taking ownership of the reservation which is needed to process instrument / mileage upgrades
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