Airfare "hacks" travel the internet in breathless posts that skip the fine print. We read airline fare rules for a living, so here is the honest version: what works, what is risky, and what will get your ticket cancelled.

Open-jaw: the underrated one (safe)

Fly into one city and home from another — for example London → Rome, then Venice → London. Completely within the rules, often barely more expensive than a simple return, and it saves you backtracking across a country. Book it as a multi-city search in one ticket; it is the single most underused legitimate trick in travel.

Split ticketing: usually fine, know the catch

Two separate tickets (say, home → hub on a low-cost carrier, hub → destination on a long-haul airline) can undercut a through-fare by a lot. The catch: no missed-connection protection between separate tickets. Leave 3+ hours between them, carry cabin bags only if possible, and treat the saving as payment for accepting that risk.

Hidden-city: the famous one (risky)

Booking A→B→C because it is cheaper than A→B, then walking away at B. Understand what you are risking before romanticising it:

• Checked bags go to C — carry-on only, always.
• If any leg is delayed, the airline may reroute you around B entirely.
• Return legs cancel automatically the moment you no-show — only ever do this on the last leg of a one-way.
• Airlines' contracts of carriage prohibit it; frequent flyers have had miles confiscated and accounts closed for repeat use.

The boring tactics that beat all of them

Flexible dates (mid-week departures), booking 8–10 weeks out, fare alerts, and comparing nearby airports typically save more per year than any exotic routing trick — with zero risk. That is exactly what the FlightMatrix fare grid is built to show you in one screen.