Buy on Tuesday. Most airlines begin their sales Monday evenings, and rivals usually match the lowered fares by the next day. It pays to look for sales three to four months before you travel: That’s when airlines “begin to look closely at which route may need a sale to fill the seats.”
Ask for a refund. Many airlines offer a partial refund if a fare drops after you purchase a ticket. Yapta.com “helps get you that refund” by sending you an e-mail or Tweet when the price drops. AutoSlash.com offers a similar service for car rentals.
Save when you park. BestParking.com “steers drivers toward the cheapest parking” at off-airport lots near 79 domestic airports. Rates are updated frequently, and the site offers a free app for smartphone users.
Don’t pay to check a bag. Using American Express’s Delta SkyMiles–branded credit card allows you to check a bag at no cost.
Source: The New York Times