From ATL/ORD/DFW/HOU/MIA/NYC/BOS/LAS/SEA/YVR..(and more) to many cities in Europe via London, the flight within Europe is in business class.
Most of these flights are with BA only, but for some you may fly to London with AA as well.
There are a lot of combinations, can't post them all
Boston to Pisa 3234$
https://www.google.com/flights/#flt=...;sc:f;sd:1;t:f
Seattle to Copenhagen 3430$
https://www.google.com/flights/#flt=...;sc:f;sd:1;t:f
Vancouver to Barcelona 3490$
https://www.google.com/flights/#flt=...;sc:f;sd:1;t:f
Miami to Paris 3598$
https://www.google.com/flights/#flt=...;sc:f;sd:1;t:f
Dallas to Barcelona 3884$ (AA possible)
https://www.google.com/flights/#flt=/m/0f2rq./m/01f62.2019-11-24*/m/01f62./m/0f2rq.2019-11-30;c:USD;e:1;a:-AV,-CM*-AV,-CM;p:390000.2.USD;sc:f;sd:1;t:f
Here the rules that I found: RESERVATIONS FOR ALL SECTORS ARE REQUIRED AT LEAST 60 DAYS
BEFORE DEPARTURE.
WAITLIST AND STANDBY NOT PERMITTED.
TICKETING MUST BE COMPLETED WITHIN 3 DAYS AFTER
RESERVATIONS ARE MADE OR AT LEAST 60 DAYS BEFORE DEPARTURE
WHICHEVER IS EARLIER.
NOTE -
DUE TO TTL ROBOT PROCESS DIFFERENCES MAY EXIST
BETWEEN THE CRS LAST TICKETING DATE AND TTL ROBOT
REMARK.
THE INFORMATION BY SSR IN THE PNR PREVAILS. TRAVEL FROM INBOUND TRANSATLANTIC SECTOR MUST COMMENCE NO
EARLIER THAN 7 DAYS AFTER DEPARTURE OF THE OUTBOUND
TRANSATLANTIC SECTOR.
AND - TRAVEL FROM TURNAROUND MUST COMMENCE NO EARLIER THAN
12 HOURS AFTER ARRIVAL AT TURNAROUND. TRAVEL FROM LAST STOPOVER MUST COMMENCE NO LATER THAN
MIDNIGHT 6 MONTHS AFTER DEPARTURE FROM FARE ORIGIN. STOPOVERS NOT PERMITTED ON THE FARE COMPONENT. 2 TRANSFERS PERMITTED IN EACH DIRECTION FREE
2 FREE ON 9B/AA/AB/AY/BA/HG/IB ONLY IN EUROPE IN EACH
DIRECTION.
AND - 2 TRANSFERS PERMITTED IN EACH DIRECTION FREE
1 FREE BETWEEN AA/BA/IB AND B6 IN BOS/JFK IN
EACH DIRECTION
1 FREE BETWEEN AA/BA/IB AND AS IN LAX/PDX/SEA IN
EACH DIRECTION
1 FREE BETWEEN AA/BA/IB AND WS IN CANADA IN EACH
DIRECTION
1 FREE BETWEEN AA/BA/IB AND HA IN HAWAII IN EACH
DIRECTION
2 FREE ON AA/BA/IB ONLY IN THE UNITED STATES/
CANADA IN EACH DIRECTION
FARE BREAK SURFACE SECTORS NOT PERMITTED AND
EMBEDDED SURFACE SECTORS PERMITTED ON THE FARE
COMPONENT.
Here's a link to my blog where I posted these fares:
https://www.premium-flights.com/2019/0...