Note also that the baggage allowance for international travel may be destination specific. Click on the "view policy" link for specific airline policy.  

Please be advised, airlines can also charge fees if the baggage is 'oversized'. Oversized luggage is defined as any bag over 50 lbs. and larger than 62 linear inches (height x length x width).

Carry-On Bag

On most airlines passengers are allowed to bring one (1) carry-on bag, plus one (1) additional personal item such as a purse, briefcase or laptop. 
This limit applies to travelers boarding all flights departing from the U.S. airports for both domestic and international destinations.  The maximum size carry-on bag for most airlines is 45 linear inches (the total of the height, width, and depth of the bag.)  Anything larger must be checked.  Check the links below for specific baggage policies.
**Spirit Airlines does charge for Carry-On bags.  Please click the link to their web site listed below for fees.**

Checked Baggage Chart

Domestic Trips / International Trips
Fees are per flight unless otherwise noted.

Carrier	Checked 1st bag	Checked 2nd bag	Oversize/ Overweight bag
AirTran View policy	$15	$25	$49–$79
Alaska View policy	$20	$20	$50–$75
American View policy	$25	$35	$50–$150
Continental View policy	$20*	$30*	$50–$150
Delta View policy	$23	$32	$90–$175
Frontier View policy	$20	$30	$75
JetBlue View policy	No fee	$30	$50–$100
Midwest View policy	$20	$30	$75
Northwest View policy	$20*	$30*	$50–$100
Spirit Airlines View policy	$25*	$25*	$50-$150
Sun Country View policy	$20	$30	$75
United View policy	$25*	$35*	$125–$175
US Airways View policy	$25*	$35*	$100–$200
Virgin View policy	$20	$20	$50–$100

International Trips / Domestic Trips

Carrier	Checked 1st bag	Checked 2nd bag	Preferred seat
AeroMexico View policy	No fee	No fee	$100–$200
Air Canada View policy	No fee	$30 CAD	$75–$100
Air France View policy	No fee	No fee	$50–$150
American View policy	No fee	$50	$50–$150
British Air View policy	No fee	No fee	$50–$150
Continental View policy	No fee**	$45**	$50–$150
Delta View policy	No fee**	No fee**	$90–$175
Lufthansa View policy	No fee	No fee	$50–$200
Mexicana View policy	No fee	$40	$50+
Northwest View policy	No fee	$50	$50–$100
United View policy	No fee	$50	$125
US Airways View policy	$20**	$30**	$65–$200

*   Airline offers a discount if you pre pay online their web site.
** Airline has different policies based on destination of travel.