Originally Posted by slim_slag
Just looked at the raw data for people who are constrained in the way you describe. For that period I looked at, on every day you will always get a cheaper fare on Ryanair than BA.
I don't doubt that this is often true. But, IME, the difference is usually not what some would like claim it to be. Often the prices for a certain date are pretty comparable. A person who needs to fly on 14 and 18 September would not have set out to pay the
maximum possible fare on each airline on those dates. Much more likely that they would have looked at the
lowest fare possible on each airline - producing the fare difference that has already been posted. A £40 difference between those fares is a world apart from the £440 that daz211's post suggested that it was.