Mo

Yes — with TUI you can add baggage after online check-in by calling customer service; at the airport you pay per-kg excess at check-in.

Yes — you can add check-in baggage after booking via Manage Booking, during online check-in, or at the airport; prices and cutoffs vary by airline.

Yes — add TSA PreCheck to a Frontier reservation by entering your Known Traveler Number in Manage Trip or the app, with matching name and birth date.

Yes, a TWIC card is accepted as ID at TSA checkpoints; it doesn’t grant PreCheck or replace your boarding pass.

Yes. JetBlue lets each traveler bring one carry-on plus one personal item; you cannot buy an extra carry-on, but you can check another bag.

Yes, a Trunki can travel as hand luggage on many airlines, but limits vary; match its size to your fare and keep weight and straps tidy.

Yes, on Ryanair you can add baggage after online check-in in My Bookings until 2 hours before departure; then re-download the boarding pass.

Yes, you can add baggage to a Vueling booking online, in the app, or at the airport—prices rise as you get closer to departure.

Yes — you can add baggage to an easyJet booking in Manage Bookings or the app, and buying online usually costs less than at the airport.

Yes—on most airlines you can add bags after web check-in, either online before the cutoff or at the airport if online changes are closed.