Originally Posted by
pfieldston
Do you think a Terminal 1 to 4S transfer is doable in 3 hours? Looking at a Ryanair flight (from Canaries) that lands at 1:30pm and then an Iberia flight departing to the US at 4:30pm. Only carry-on so will not be dealing with checked bags. If it’s too tight, what’s a reasonable time to allow for such a connection?
That's perfectly doable if you land on time, or even with a relatively minor delay. But of course it depends on your risk tolerance and how much it would cost you to buy a new flight to the US if you are more badly delayed. Personally I'd probably go for it with 3h, but not less than that.
If there's a similar timed IB flight from the Canaries for not much more (or bookable with avios) that may be preferable.