Fly from New York to London this spring for $417 round-trip, nonstop, including all taxes, on Delta Airlines. This fare is available for departures through April 12, and allows for returns up to 12 months. We also like the 3-day advance purchase for this one!

If you don't live in or around NYC, no biggie. We've spotted similarly low fares departing from other cities, even from the West Coast:

Baltimore to London $478 round-trip, including all taxes

Boston to London $417 round-trip, including all taxes

Los Angeles to London $555 round-trip, including all taxes

Orlando to London $656 round-trip, including all taxes

Philadelphia to London $455 round-trip, including all taxes

San Francisco to London $580 round-trip, including all taxes

Washington DC to London $478 round-trip, including all taxes

For a complete listing of fares, please visit our page for London Heathrow.