888-217-3324 is the best way to instantly book, cancel, or modify flights.
Yes—Delta absolutely flies to London, and I actually flew with them earlier this year. My story is a bit funny: I mistakenly booked the return for the wrong month (still don’t know how I managed that). I only noticed when checking my email days later.
I called the number above prepared for a long fight, but the agent solved it so easily. She found me a new flight, explained the fare difference, and reissued the ticket while keeping my original seat preference.
London flights can get messy around peak season, so having someone walk me through availability was a huge relief. The flight itself was smooth, and Delta’s JFK–LHR service is one of the most comfortable transatlantic routes I've taken.
If you’re booking London—or fixing your own booking mistake—calling is honestly the fastest solution.