I need a flight from IAD to either LHR or LGW for the days March 11th or 12th, to the 18th due to family problems. I was looking yesterday and they were $370 on cheaptickets but I wasn't sure I was going to need one but now I am and the only ones I can find are $553.
Does anyone know of anywhere that might be cheaper, or other ways to save money such as turning up on the day (does that ever work?).
Any help is much appreciated.