Travel Resources — Official Sources and Planning Tools

This is the index page for everything we link to but didn't write. Government advisories, health authorities, standards bodies, fare-tracking tools, insurance comparators — the primary sources that sit underneath our destination grading and trip-planning recommendations. If a link is on this page it's because we use it ourselves before recommending a place or a platform.

Booking endpoints (our /go/ pages)

• Flights — Google Flights, Skyscanner, Kayak, Kiwi, CheapOair: which is good for what.
• Hotels and stays — Booking, Agoda, Hotels.com, Expedia, Traveloka with honest "best for" notes per platform.
• Ground transport — trains, buses, and ferries via Omio (Europe) and 12Go (Asia).
• All booking platforms — the index, with the "what each is best for" matrix.

Official trip-planning sources

• U.S. State Department travel advisories — level-1 through level-4 ratings, country-by-country, with specific risk callouts.
• CDC travel health notices — vaccine recommendations, outbreak watches, current health entry rules per country.
• TSA travel resources — carry-on rules, security wait-time data, PreCheck and Global Entry enrolment.
• U.S. passport status & renewals — current processing times, where to apply, how to expedite.
• IATA Travel Centre — visa, health, and document requirements for any nationality flying to any destination. The reference airlines themselves use.

Insurance and protection

• InsureMyTrip — comparator across 20+ travel insurance providers; filter by trip cost, age, coverage type, pre-existing-condition waivers.
• Squaremouth — second comparator we cross-check against; their "Zero Complaint Guarantee" filtering is useful.
• Smart Traveler Enrollment Program (STEP) — free U.S. government registration so the embassy can reach you in an emergency at your destination.

Price-discovery tools

• Google Flights — calendar grid and price-graph view; best at "is my date unusually expensive."
• Flightradar24 — on-time history per flight number; red flag if a route is chronically late.
• SeatGuru — aircraft-and-airline-specific seat maps with seat-pitch and gotcha notes.

How we keep this list honest

Outbound links to booking and insurance platforms may pay SEOdefend a small commission. Government and standards-body links never do — they're listed because they're authoritative. If a tool here stops being useful or starts paying meaningfully worse, we replace it; we don't promote it harder.

See also: destinations with grading, guides for how-tos, deals for current-price tools, and reviews for which platforms hold up.