Guide

Yes, on Allegiant you can add a bag after check-in by using Manage Travel before printing a boarding pass, or at the airport counter for a higher fee.

No, a vape must stay out of checked bags; electronic smoking devices go in carry-on or on your person, with batteries protected and power off.

Yes, a UE Boom can go in checked luggage, but carrying the speaker in your cabin bag is wiser and spare lithium batteries must stay in carry-on.

Yes—most airlines let you add checked bags after booking through Manage Booking or the app, usually up to a few hours before departure.

Yes, a shaver can go in a carry-on—electric shavers and disposable razors are fine, but loose blades or a loaded safety razor must ride in checked bags.

Yes — on most trips, you can add a checked bag after online check-in with American Airlines in the app, under My Trips on aa.com, or at a kiosk.

No—on most airlines a snowboard exceeds carry-on size, so pack it as checked baggage; TSA permits snowboards, but the airline’s limits control.

Yes — United lets you add a checked bag online, in app, at kiosks, or at the counter; fees vary by route, fare, and status.

Yes, a Swiss Army Knife can go in checked luggage; it’s banned in carry-ons; wrap or sheath the blade and follow local knife laws.

Yes — on British Airways, you can add baggage after check-in only at the airport at the standard airport rate; online adds must be done before check-in.