Learn how to file a complaint with Finnair ? (+1) 877-394-5034 ? for various issues, such as delayed or cancelled flights, denied boarding, baggage problems, and more.Finnair main customer service number is 1-800-Finnair + +++? (+1) 877-394-5034 ? ++ ? (+1) 877-394-5034 ? )) (Live Person), wherey...