At the end of every flight booking sits a tempting little checkbox: Protect your trip? Most people click yes or no on instinct. A better approach is to know what you're actually buying — because "travel insurance" is really several different products bundled together, and only some of them may matter for your trip.

What it actually covers

A typical policy combines a handful of distinct protections, as Investopedia outlines:

  • Trip cancellation and interruption. Reimburses prepaid, non-refundable costs if you have to cancel or cut a trip short for a covered reason (illness, say). This is usually the core of the policy.
  • Emergency medical. Covers medical treatment if you fall ill or are injured abroad — often the most important piece, because your home health insurance may not cover you overseas.
  • Emergency medical evacuation. Pays to transport you to adequate care or home in a serious emergency. This can be extraordinarily expensive out of pocket — potentially tens of thousands of dollars — which is why it can be the single most valuable coverage.
  • Baggage and delay. Reimburses lost, stolen or delayed luggage and some costs from long delays. Useful, but usually the smallest financial stakes.

Why medical cover is the part that matters most

Here's the point travelers most often miss: your domestic health insurance frequently does not cover you abroad, and public-hospital access you take for granted at home may not exist. The U.S. State Department explicitly warns travelers to check whether their insurance works overseas and to consider coverage that includes medical evacuation, in its health-abroad guidance. A bad fall on a remote trip can turn into a five- or six-figure bill; that risk, not a delayed suitcase, is the real case for a policy.

When it's worth buying — and when it isn't

Insurance is about transferring risks you can't afford to absorb. With that lens:

More worth it when:

  • You've prepaid a large, non-refundable amount (a cruise, a tour, flights).
  • You're traveling far from good, affordable medical care, or somewhere remote.
  • You have health conditions, are traveling during risky seasons, or the trip is long.

Less worth it when:

  • The trip is cheap or fully refundable — there's little financial loss to insure.
  • You already have strong coverage elsewhere. Some credit cards include trip-cancellation, delay and rental-car protections when you pay with them, and a few health plans extend abroad. Check before you double-buy.

Read before you click

If you do buy, the details decide whether it's worth anything:

  • "Covered reasons." Standard trip-cancellation pays only for specific listed reasons. If you want to cancel for any reason, that's a pricier separate add-on.
  • Exclusions. Pre-existing conditions, high-risk activities (skiing, scuba) and known events may be excluded unless you buy specific cover.
  • Limits and deductibles. Check the maximum payouts, especially on medical and evacuation.
  • Primary vs. secondary. "Secondary" coverage pays only after your other insurance; "primary" pays first, with less hassle.

The bottom line: travel insurance is worth buying when a trip carries losses you couldn't comfortably swallow — big prepaid costs or a serious medical bill far from home — and easy to skip when it doesn't. Boursel gives no individual advice; the smart move is to check what your cards and health plan already cover, then insure the gap that would actually hurt.