American Increases Gift Limit

Through Dec. 31, you can transfer up to 100,000 miles to someone else’s account, and receive up to 100,000 miles into your account with shareAAmiles. You can also buy up to 60,000 miles for yourself or friends and family through buyAAmiles. For more information: http://www.aa.com/aa/i18nForward.do?p=/AAdvantage/programDetails/purchasingMiles/purchasingMiles.jsp

Membership Rewards 20% Mileage Bonus with Delta

It’s valid through Oct. 17 on points transferred to a SkyMiles account. 1,000 mile minimum; bonus points post up to six weeks after offer expires. Registration required at: https://www.delta.com/skymiles/ways_to_get_miles/transfer_miles_partners/transfer_miles_lto/transferrewards/index.jsp.

AirTran Rewards Program Changes

Complimentary upgrades will be available to A+ elite members at the gate 40 minutes prior to departure, based on availability. A+ elite members on stand-by for an earlier or later flight will have priority. To retain elite status, members must fly at least 12 one-way, A+ credit-earning flights during the subsequent 365 days. Current elite members will have until Jan. 31, 2009, or one year from the date of Elite status attainment (whichever is longer) to renew. A+ elites are now eligible for free in-flight cocktails, exemption from redemption fees, and exemption from change fees when traveling on AirTran partner Frontier Airlines.

United's Checked Bag Fee Increases

For travel on or after Nov. 10, United’s fee for a second checked bag will increase to $50. Exempt are First and Business Class passengers, United and Star Alliance elites, and active military personnel.

Northwest’s Hawaii Promo

Flights to the Aloha State before Dec. 26 net double miles, and a four-night stay in a Hilton gets 10,000 Hilton HHonors points. To book, visit hiltonfamilyhawaii.com/pointsandmiles or call 1-800-HHONORS and request Plan Code H9 (Hilton Hotels) or HH9 (Doubletree and Embassy Suites).