WOW ! "Flight from L.A. to London reaches 801 mph as a furious jet stream packs record-breaking speeds" - Los Angeles Times

"It appears that's a record for the Boeing 787-9 twin jet, which in the past has flown at speeds up to 776 mph. The ordinary cruising speed of a Dreamliner is 561 mph, with a maximum propulsion of 587 mph. Any speed gained on top of that is thanks to Mother Nature's helpful boost...."

https://www-latimes-com.cdn.ampproject.org/v/s/www.latimes.com/science/la-sci-sn-jet-stream-flight-20190219-story.html?outputType=amp&amp_js_v=0.1&amp_lite#webview=1&cap=swipe