fare class OKN4Z1S4
major rule: TRAVEL FROM INBOUND TRANSATLANTIC SECTOR MUST COMMENCE
NO EARLIER THAN THE FIRST SUN AFTER DEPARTURE OF THE
OUTBOUND TRANSATLANTIC SECTOR.
PERMITTED 10APR18 THROUGH 20APR18 OR 02MAY18 THROUGH
15JUN18 OR 17AUG18 THROUGH 28FEB19 FOR EACH
TRANSATLANTIC SECTOR. SEASON IS BASED ON TRIP DATE.
€272, 14hours and 1 stop, have 4 hours to switch LHR->LGW during outbound)
https://www.google.com/flights/?f=0#...0-LHRBRU1BA392
€295, 12 hours and 1 stop, no airport switches
https://www.google.com/flights/?f=0#...WORLD;s=1;eo=e
try matrix ita with extension code "ALLIANCE oneworld; f bc=o", stops= up to 1 stop
*A matching fares too (ALLIANCE star-alliance; f bc=k)