Fly from Phoenix to London for $715 round-trip on Delta.
Searching Delta.com, we found seats available for travel over the July 4th holiday, departing PHX on Wednesday, July 1, returning from Wednesday, July 8. Flights connect via Minneapolis MSP.
Other dates are available for travel throughout summer. For those who don't mind making an additional connection, you'll find slightly lower fares ($674 round-trip) for June/July.
For booking info, see our Fare Details.
Need a room in London? Here's a look at what's available for the above dates on Hotelwatchdog.