Skycaps can be your best friend at the airport. Here's an updated list of the airlines that offer this service and how much it costs. Don't forget to tip!

Airline	Cost	Cash or Credit?	Where you'll find them	Other services available
American	Free	n/a	All major domestic airports	Print boarding pass, check and pay luggage fees via credit/debit card
Delta	Free	n/a	About 100 domestic airports	Boarding pass printout
Frontier	Free	n/a	Available in Denver, Las Vegas, & Washington (Reagan National)	Whole package: Print boarding pass, check and pay for your bags via credit/debit card
JetBlue	$2 per bag (free at DCA, HPN)	credit/debit only	Many of JetBlue's US destinations	Pay baggage fees via credit/debit card, print boarding pass
Southwest	Free	n/a	All airports, except some smaller ones in Texas	Boarding pass printout
United	Free	n/a	Most domestic airports	Pay baggage fees via credit/debit card, boarding pass printout
US Airways	$2 per bag	credit/debit only	24 domestic airports	Pay baggage fees via credit/debit card, boarding pass printout
Virgin America	Free	n/a	SFO and LAX – they're working on EWR now.	Pay baggage fees via credit/debit card, boarding pass printout