Virgin America has posted cheap fares to London from the following airports: Boston, Chicago, New York (JFK and EWR), Orlando, San Francisco, Washington D.C. You can fly from $840 round-trip.
These are the rules:
– Round-trip purchase required.
– You can fly September 1 – October 31.
– No departing flights on Friday or Saturday.
– Book flights at least 28 days in advance.
– There’s no “book-by” date, which means fares are on sale until they’re gone.