Airlines create schedule to enhance customer choice, including new nonstop service between Portland and London
Delta Air Lines and Virgin Atlantic today announced changes to their respective summer 2017 schedules to optimize their joint network between the United States and the United Kingdom. The move reflects the strong partnership between the two airlines, which is focused on offering customers more travel choices and flexibility.

The changes are as follows:

For Delta:

A new four times a week Portland, Oregon to London Heathrow seasonal service will begin on May 26, 2017, the first between this U.S. West Coast city and London.
Beginning March 26, 2017, the airline will add a second Detroit to London Heathrow service. This new flight replaces Virgin Atlantic's daily Detroit to London Heathrow service.
The airline will fly a third Atlanta to London Heathrow frequency, taking over the second daily service currently operated by Virgin Atlantic, beginning May 25, 2017. Virgin Atlantic will continue to operate one daily Atlanta to London Heathrow service.
For Virgin Atlantic:

Beginning March 26, 2017, the airline will start flying between Seattle and London Heathrow, replacing the daily service currently operated by Delta.
A daily nonstop service between New York-JFK and Manchester will commence May 25, 2017 replacing the service currently operated by Delta. Delta will resume service for the winter 2017