Flights from Seattle to Las Vegas are most expensive in late March to mid-April and December, with lower prices in early February and late September.

When planning your flights from Seattle to Las Vegas, expect significant price fluctuations throughout the year. The peak price periods generally occur in late March to mid-April, and December around the holidays, with flights typically ranging from high prices of around $225 to $254. Conversely, the low price seasons are noted in early February and late September, where prices can dip below $170. Pay special attention to early February for the lowest fares and late December for the highest. Overall, expect better deals in the winter months compared to the more expensive summer and holiday seasons.

Book your Seattle to Las Vegas flight 29 to 50 days in advance for the best prices; avoid last-minute purchases to prevent steep price increases.

For your trip from Seattle to Las Vegas, the best time to purchase your flight is between 29 to 50 days before departure, with the lowest prices typically around 34 days out at $175. Avoid booking earlier than 50 days, as prices can reach up to $236. Prices remain relatively stable during this timeframe but begin to rise sharply once you get within 24 days of departure, potentially reaching as high as $283. Be cautious of last-minute bookings, as they may cost significantly more, often exceeding 55% above early purchase prices. Securing your tickets well in advance will give you the best chance at affordable rates.