Aer Lingus links Seattle nonstop with London (LHR) and Dublin (DUB).
Air Canada (Star Alliance) links Seattle nonstop with Frankfurt-am-Main (FRA) and Munich (MUC).
Air France (SkyTeam) links Seattle nonstop with London (LHR), Amsterdam (AMS), Rome (FCO), Barcelona (BCN), Paris (CDG), and Copenhagen (CPH).
airBaltic links Seattle nonstop with Reykjavik (KEF).
Alaska Airlines (Oneworld) links Seattle nonstop with London (LHR), Reykjavik (KEF), Frankfurt-am-Main (FRA), Rome (FCO), Paris (CDG), Helsinki (HEL), and Athens (ATH).
American Airlines (Oneworld) links Seattle nonstop with London (LHR), Dublin (DUB), and Helsinki (HEL).
Atlantic Airways links Seattle nonstop with Reykjavik (KEF).
Austrian Airlines (Star Alliance) links Seattle nonstop with Frankfurt-am-Main (FRA) and Munich (MUC).
British Airways (Oneworld) links Seattle nonstop with London (LHR), Dublin (DUB), and Helsinki (HEL).
Brussels Airlines (Star Alliance) links Seattle nonstop with Frankfurt-am-Main (FRA) and Munich (MUC).
Condor links Seattle nonstop with Frankfurt-am-Main (FRA).
Delta Air Lines (SkyTeam) links Seattle nonstop with London (LHR), Amsterdam (AMS), Rome (FCO), Barcelona (BCN), Paris (CDG), and Copenhagen (CPH).
Discover Airlines (Star Alliance) links Seattle nonstop with Frankfurt-am-Main (FRA) and Munich (MUC).
Etihad Airways links Seattle nonstop with Frankfurt-am-Main (FRA).
Finnair (Oneworld) links Seattle nonstop with London (LHR) and Helsinki (HEL).
Iberia (Oneworld) links Seattle nonstop with London (LHR), Dublin (DUB), and Helsinki (HEL).
Icelandair links Seattle nonstop with Reykjavik (KEF).
KLM (SkyTeam) links Seattle nonstop with London (LHR), Amsterdam (AMS), Rome (FCO), Barcelona (BCN), and Paris (CDG).
Lufthansa (Star Alliance) links Seattle nonstop with Frankfurt-am-Main (FRA) and Munich (MUC).
Saudia (SkyTeam) links Seattle nonstop with London (LHR), Amsterdam (AMS), and Paris (CDG).
Scandinavian Airlines (SkyTeam) links Seattle nonstop with London (LHR) and Copenhagen (CPH).
Swiss International Air Lines (Star Alliance) links Seattle nonstop with Frankfurt-am-Main (FRA) and Munich (MUC).
TAROM (SkyTeam) links Seattle nonstop with Frankfurt-am-Main (FRA).
Turkish Airlines (Star Alliance) links Seattle nonstop with Arnavutkoy (IST).
United Airlines (Star Alliance) links Seattle nonstop with Frankfurt-am-Main (FRA) and Munich (MUC).
Virgin Atlantic (SkyTeam) links Seattle nonstop with London (LHR), Amsterdam (AMS), and Paris (CDG).