no, however American Airlines is
No, American is a member of the OneWorld Alliance, whereas Delta is a SkyTeam member.
No. British Airways is a member of the OneWorld airline alliance, while Alitalia is a member of the SkyTeam airline alliance.
No, Lufthansa's American partner is JetBlue Airlines
American Airlines is one of the founding members of oneworld alliance.
No, Delta was a founding member of SkyTeam.
Qantas Airlines is a member of the OneWorld Alliance, along with American Airlines, British Airways, Iberia, FinnAir, Cathay Pacific, etc.
British Airways is a Founder Member of oneworld Alliance. Five airlines from four continents - American Airlines, British Airways, Canadian Airlines, Cathay Pacific and Qantas - gathered in a ceremony in London, United Kingdom, on 21 September 1998 to officially unveil a new global airline alliance, named Oneworld.
Alaska Airlines has affiliates from the SkyTeam Alliance and the OneWorld Alliance. American and Delta Airlines are the biggest US Partners. They also have a partnership with Icelandair on flights from the US to Iceland. Horizon Airlines
Aerolineas ArgentinasAir Calédonie International (Aircalin)Air New Zealand (Star Alliance)Air Pacific (oneworld)Air Tahiti NuiAir VanuatuAsiana Airlines (Star Alliance)Cathay Pacific (oneworld)EmiratesEva AirGaruda IndonesiaJetStarKorean AirLAN Airlines (oneworld)Malaysia AirlinesPacific BluePolynesian AirlinesQantas (oneworld)Royal Brunei AirlinesSingapore Airlines (Star Alliance)Thai Airways International (Star Alliance)
Delta Airlines is one airline which recently merged with Northwest Airlines.
No Delta does not own Vietnam airlines.
Yes, blankets are provided on Delta Airlines.