A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 102,617
KLM seems a bit better (on their own mainline aircraft).
Since you're located in Portugal, have you tried TAP? That would seem to give you the most nonstop options from LIS--fewer hours spent sitting on an airplane--plus some flights from other major airports such as Porto and Faro.