Originally Posted by
LHR/MEL/Europe FF
My two concerns with a low cost carrier could be (a) some pax not being aware of visa rules so the airline might be overly strict in trying to deny uplift and (b) the LCC may not have the resources to fully investigate the actual rules in a timely manner (since they try and run on skeleton staff).
I think allowing plenty of time at check-in, and a print out of the rules 9and whatever else you can get your hands on) should be fine!
I would also carry a recently-dated printout of the rules from TIMATIC.
It might be good to try to contact the airline in advance and ask them to check their resources to verify that they show that TWOV is OK and then to add a comment to this effect to your itinerary.
Be absolutely certain that you have hard copies (plural in case the LCC wants to keep one) of the itinerary (showing reservation) and receipt (showing ticket number) for your onward UA flights.
Be sure to arrive easily at the airport and gate in case of trouble.