United Airlines

AA, DL, UA New York to London, Amsterdam, Paris, Munich $507-$593 Sep–May 2017

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AA, DL, UA Boston to Frankfurt $567-$581; MUC, BRU, ZRH, UK cities under $600

UA, DL $491, AA $506 Chicago to Amsterdam Sep-Oct still around

Seattle to Europe Alliance fares $586-$710 to 8 cities fall travel

Washington to Europe alliance fares 8 cities under $600 round trip fall travel

AA, DL, UA Minneapolis fares to Germany, Denmark under $600 Sep-Oct

United Chicago to Amsterdam $492 nonstop Sep-Oct, AA $506

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Expired: Fare Alert $409-$456 UA to Spain from AA hubs MIA, CLT, PHL, DFW Sep-Mar

Fare Alert AA, UA fall travel LAX lots of low domestic fares $39-$122 each way

LH Boston to Frankfurt $566, Munich $589, LX Zurich $542 with ticketing options for more miles