If you want to go to London from now until April 12, check out Delta.com. They have all-in total roundtrip fares from $349 from NYC (April 1-3 for example, thanks to TPG reader Adam)) or $530 from Los Angeles. Not bad, since I’ve seen NY-LA coach fares for the same price recently. These fares are available from this weekend through April 12, so book soon if you want in – these deals generally don’t last long. Delta will allow you to cancel by midnight the following day, so if you booked right now, you could cancel by 11:59pm Wednesday.
To scan for prices from your city, go to Delta.com -> Planning Tools -> Book a flight -> and then select the “My dates are flexible” box and choose flexible weekends or the +/- 3 day search.
Some other total roundtrip fares I see:
$443 from Miami
$586 from Seattle
$417 from Boston