* Southwest has special fares for active-duty U.S. military personnel. Fares, which start at $47 each way, are valid for travel any day and can be bought just one day ahead of travel. No overnight stay required. From BWI, the fare to Norfolk, for example, is $47, plus $10 taxes; usual fare booked a day in advance is $73. Info: 800-I-FLY-SWA.
* The Motor City is on sale at Spirit Air. The carrier starts service between Reagan National and Detroit on June 17 and will offer an intro fare of $59 each way for travel through Nov. 17. Total is $138 round trip, with taxes. Cheapest fare on other airlines is about $244. Purchase by May 30 at www.spiritair.com.
* Pay for a full-fare coach ticket on Malaysia Airlines from Newark to any of its 108 destination cities through June 30 and get a free upgrade to a business-class seat. The full fare for a coach ticket to Kuala Lumpur, Malaysia, for example, is $4,470 round trip, while the business-class fare is $6,170; buy a business seat and get upgraded to first class, which would cost $9,060. Taxes are an extra $70. Call 888-627-8477.