Southwest Vacations: Book a flight + hotel vacation package of $750+ to Las Vegas and save $100 when you use promo code SUMMERVEGAS100.  Book: 4/8/2025 thru 5/5/2025 by 6 PM CST Travel: 4/9/2025 - 12/31/2025  One-day advance purchase is required. Restrictions, exclusions, and blackout dates may apply to hotel offers.