Star Alliance and Oneworld airlines have discount summer fares from San Francisco to London. Prices are as low as $614 with Star Alliance and about $650 round trip with Oneworld Airlines through online travel agency sites. Finnair and American Airlines websites have ticket prices around $700.
TravelMerry.com ticket LH coded Economy K UA flight San Francisco – London LHR nonstop
United coded Economy K flights London LHR – San Francisco nonstop.
While this is a low ticket price to London, this Travelmerry.com ticket does not earn any PQD for United Mileage Plus elite status.
Fareboom.com Finnair coded OTA ticket San Francisco – London LHR – Helsinki HEL – San Francisco SFO
Flight Miles: SFO-LHR-HEL-SFO = 11,954 miles.
EQM: 11,954 x 0.5 = 5977 EQM
11954 x .05 = $597 EQD
11954 x .25 = 2,988 RDM redeemable miles + elite bonus miles.
Compare this to paying $57 more for an American Airlines ticket for SFO-LHR.
American Airlines San Francisco SFO – New York JFK – London LHR – New York JFK – San Francisco SFO
Flight Miles: SFO-JFK-LGW-JFK-SFO = 12,075 miles.
EQM: 12,075 EQM.
EQD: $486 EQD.
RDM: 2,430 Redeemable Miles + Elite Bonus (40-120%).