This chart lists the lowest generally available round-trip fares from at least one of the three Washington area airports -- Reagan National, Washington-Dulles International and Baltimore/Washington International -- for departures Aug. 15-21. Flights are nonstop or direct (stopover with no change of planes) except for some international flights. For ticket information, or to purchase tickets, call the individual airlines, not The Washington Post. For recorded information on how best to use this chart, call 202-334-7591.

Seattle $432

UA

San Francisco $255

US

Los Angeles $258

UA

Minneapolis $308

NW, SY

Denver $318

UA

Dallas $244

AA, UA

Chicago $144

AA, WN UA, US

Kansas City $208

WN

Atlanta $164

FL, DL, UA, US

Boston $128

US

New York $108

AA, TW,

UA, US

Miami $180

US

Houston $205

CO

Toronto $272

AC, US

Mexico City $548

DL

Rio de Janeiro $823

UA

London $798

BA

Frankfurt $883

LH

Tokyo $1,457

NW

Airlines

AA American

AC Air Canada

BA British Airways

CO Continental

DL Delta

FL AirTran

LH Lufthansa

NW Northwest

SY Suncountry

TW TWA

UA United

US US Airways

WN Southwest

Bargain of the Week

US Airways is offering special Internet-only deals to several cities in the Midwest. You must book the fares at www.usairways

.com/travel/fares/specoff2.htm. Deadline to purchase is midnight tonight. Sample round-trip fares: $106 between Washington Dulles and Cincinnati, $158 between BWI and South Bend, $148 between Dulles and Indianapolis.

Fares, which were researched Thursday, may change without notice, do not apply to all seats on all flights and are subject to restrictions. Most require advance purchase, are available only on midweek departures and require a Saturday night stay. Certain airport taxes and surcharges are not included. Contact airlines or a travel agent for fare details and airports of arrival and departure.

SOURCES: Internet travel services and airlines.