AlphaEcho wrote:Maybe that could be why I didn't have a problem, never looked at Aer Lingus for the Dublin leg, just BA as there was only a couple of quid in it.
My logic was that if BA failed to get me from DUB-LHR and as a result I missed the LHR-SFO leg I would stand a better chance of still getting there as BA flew to SFO from LHR whereas Aer Lingus don't.
If you booked them all as separate legs, i.e. not all on the same PNR and your BA DUB-LHR flight is late and you miss your SFO flight, I'm pretty sure BA has no responsibility to get you to SFO, although ISTBC, since the flights are all separate bookings, and they would technically only have responsibility to get you to LHR, connections on different PNRs don't count. Likewise, since these are commonly booked in the least flexible fare buckets, VS probably wouldn't reprotect you into another flight either. That's the point of having these ex-EU multi leg journeys on one PNR.
When they're on one PNR all legs of the booking will show up in your MMB on each carrier's website, although you'll only be able to make seat selections etc via each website for each carrier's portions of the booking.