Springtime is boomtime in Las Vegas — with pool-perfect weather drawing business travelers, gamblers, golfers and spa-goers eager to put winter behind them. The only catch: $500-a-night rooms; $300 meals; $200 show tickets.

Not this year. .

Reacting to a national economic slump that has depressed gambling revenues and room rates along the tourist zone known as the Las Vegas Strip, casino and hotel operators are offering up a buffet of spring time deals normally reserved for the hot, slow summer months.

Already, room rates along the Strip are predicted to decline 23 percent through May 3, according to one analyst. Gambling revenues recently dropped for the second straight month, and visitation is down slightly.

Conventioneers — those lanyard-wearing herds responsible for driving up midweek hotel-room prices — are cutting their stays short. Leisure travelers aren’t coming in their usual peak spring numbers.

That “has a significant impact” on revenue, said Terry Jicinsky, senior vice president of marketing for the Las Vegas Convention and Visitors Authority. “That’s where we’re beginning to see some of the opportunities in discounted room rates and packages.”

Major properties up and down the Strip are running special spring rates under $100, and the deals aren’t just in Vegas. Casino resorts across the country in everywhere from Atlantic City, N.J., to Detroit are offering to pay for guests’ gasoline, theater tickets, massages and steak dinners.

In Las Vegas, cab lines are mercifully quick and short; getting into A-list clubs and restaurants at the last minute is possible, even probable.

There’s room to linger and take photos in the Bellagio’s ornate butterfly garden without being ushered along by competing tourists. “Greeters” walking the Strip offering coupons to free breakfast buffets in exchange for attending a 90-minute condo presentation are upping their offers to free shows, dinners and even free hotel stays.

Las Vegas’s New York, New York casino hotel is offering spring rates of $89 per night (see www.nynyhotelcasino.com). Meanwhile, the Luxor is offering a “Getaway” package starting at $69 a night that includes a $30 dining credit, $20 off spa services, and a $10 gambling credit at www.luxor.com. Meanwhile, Excalibur and Circus Circus are offering rates as low as around $40 a night.

Even the swankiest properties are lowering rates and offering perks — from the Four Seasons (stay two consecutive nights and get the third night free; see www.fourseasons.com/lasvegas) to the extravagant, new Palazzo (suite packages for $269 a night on weekends include a $25 gambling credit and Canyon Ranch spa passes; see www.palazzolasvegas.com) — in a bid to lure visitors.

“This is absolutely a great time for visitors to come out to Vegas and get a greater value,” said Lori Nelson, spokeswoman for Stations Casinos, which owns the Red Rock resort and casino.

Room rates at Red Rock, a sleek, luxury hotel a short drive from the Strip (and featured prominently in the gambling movie “21“), are 10 percent to 15 percent lower than they were last year at this time, Ms. Nelson said.

Rooms run as low as $120 a night, midweek in May.

Finding the very best deals can take a little digging. Casino Web sites offer deals on their properties. But be sure to sign up for email alerts that will flag rates and packages that aren’t always featured on Web sites.

Big discounts are conveniently corralled in the last place you might think to look: Las Vegas’s official tourist Web site, www.visitlasvegas.com. The Web site, which is run by the Las Vegas Convention and Visitors Authority, has launched its summer promotional campaign a few months early to help boost tourism. The campaign, “Vegas Right Now,” features room and show packages consumers don’t typically see until July and August.

The site featured a Caesar’s Palace package that includes one night in a double-occupancy room, two tickets to Elton John’s “The Red Piano” show, and two drink tickets for $642, plus tax — savings of over $100. Not even Caesar’s own Web site or phone reservations center could beat it. (The same package booked separately through Caesar’s would have cost $742, plus tax, for the night of June 3. The room rate quoted was $180, and rear orchestra seats were $281 per person.)

Travelers can also find good deals on flights to Las Vegas, according to the Web site Cheapflights.com, which compiles deals from multiple Web sites.

Las Vegas isn’t the only destination offering springtime deals. Casino revenues are declining across the country because of smoking bans, competition and skittish consumers. And markets are hurting from Atlantic City, where gambling revenue decreased 9 percent last month, to Colorado, where a smoking ban recently took effect.

Meanwhile, Midwestern casinos from Detroit to Iowa are competing for regional visitors and dangling enticements.