The cheapest service needs the earliest send date

Recommended last day to send for expected delivery by December 25 · bar length = days before Dec. 25

USPS 2026 holiday send-by dates, lower 48 states Ground Advantage and First-Class Mail by Dec. 17, Priority Mail by Dec. 18, Priority Mail Express by Dec. 19. Ground Advantage and First-Class Mail · Thu, Dec. 17 Ground Advantage and First-Class Mail Thu, Dec. 17 Priority Mail · Fri, Dec. 18 Priority Mail Fri, Dec. 18 Priority Mail Express · Sat, Dec. 19 Priority Mail Express Sat, Dec. 19

Source: United States Postal Service, 2026 holiday shipping deadlines