Here's something very interesting. You know how we often tell you to search individual airline sites? Well that is a good idea. But not always. British Airways is having a sale to London right now, so we searched on their site for New York JFK to London leaving Sept 5 returning Sept 11, and as you can see we saw crazy high fares of $824 using their flexible date search:
Same itinerary on BA via Orbitz? A much more reasonable $571 RT. But, as a reader pointed out, this difference is because BA's flexible search is showing refundable fares
So if you're one of these people who never uses third-party travel sites, think again. As you can see, American has an even lower fare for this late summer itinerary.