Travel agency SEO cost changes with the amount of work required, not simply with a package label. Start by documenting the agency's destination portfolio, service pages, enquiry or booking integrations, languages, markets, and implementation capacity.
Site size and technical debt: A travel agency with 500 destination or itinerary pages can require materially more crawling, duplication analysis, template review, and internal-link work than a clean 30-page site. The cost depends on what is actually broken and who is responsible for implementation.
Market competition: Broad travel-planning searches can include OTAs, publishers, ads, directories, and established agencies. More competition can justify deeper work, but it does not create a guaranteed spend-to-ranking relationship.
Content scope: Destination planning pages, itinerary guidance, service pages, and supporting resources require research, editing, fact checking, publishing, and maintenance. A retainer that includes those functions is not comparable with one that assumes the agency supplies finished content.
Geographic reach: Local storefront visibility, national service coverage, and multi-market travel planning create different requirements. Dedicated location pages should exist only for genuine offices or service areas with distinct useful information.