Why we publish corridors instead of tips
Almost every piece of advice about finding cheap flights is written about flights in general. Book on a Tuesday. Book six weeks out. Clear your cookies. None of it survives contact with a specific origin and destination pair, because an airfare is not produced by a general market. It is produced by the handful of airlines that fly your corridor, the demand pattern of the people who use it, and the fare rules those airlines filed against it.
Consider two routes at the same distance. One is flown by six carriers with a dozen daily departures each way, mostly selling to business travellers who buy late. The other is flown by two carriers, once a day in winter, selling almost entirely to holidaymakers who book months ahead. The advice that helps on the first — wait, the buckets reopen — will cost you money on the second, where the cheapest inventory sells out in February and never comes back.
That is the argument for a corridor guide. It replaces "when should I book a flight" with the only question that has an answer: how does this market behave, and where in it am I standing now.
The five things that differ from corridor to corridor
Competition depth. The number of carriers offering a credible product, not the number in the search results. A route with three non-stop operators prices very differently from one where a single airline holds the non-stop and everyone else routes you through a hub with a five-hour connection. Depth is also why fares reopen: on a dense corridor, an airline that sees itself undercut files down to match and inventory that looked gone reappears.
Seasonality, and whose calendar drives it. Some corridors follow the US holiday calendar. Others follow the destination's — a national holiday week, a festival, a school break. Visiting-friends-and-relatives routes peak on dates that look arbitrary from a US marketing calendar and are entirely predictable to anyone who knows the community flying them.
Fare-family structure. The gap between the cheapest fare and the next one up is not constant. On some corridors the entry fare is a usable economy ticket with a bag and a seat. On others it is a stripped base fare that exists to win the search-results comparison, and the real fare sits well above it. The fare family table on our cheap flights page explains the mechanics; a route guide tells you which pattern applies where you are flying.
Connecting options. A one-stop routing is a price lever only where the hub is genuinely on the way and the carrier wants the traffic. Over some corridors a connection adds three hours and saves nothing; over others it saves a substantial share of the fare and costs you a night. What it gives up — checked-through bags, single-ticket protection, a realistic connection time — matters as much as what it saves.
Baggage and ancillary rules. The single most common reason a traveller overpays is comparing base fares on routes where the base fares include different things. Two bags on one carrier, none on another, a carry-on excluded entirely on a third. See baggage information for how allowances are determined when more than one airline is on the ticket.
How to read the fare bands we publish
Every route guide carries a table of indicative round-trip totals. Five things about those tables are worth stating plainly before you use them.
First, they are ranges, not prices. A band such as "$520–$760" means the corridor routinely produces fares across that spread in that season at that booking distance. It does not mean we can sell you the bottom of it, and nothing on this site is an offer. Second, they include government taxes and carrier-imposed charges, because a base fare comparison between markets with different tax regimes is meaningless. Third, they describe a fare family, and the table says which one. Fourth, they age — fuel, capacity and competitive entry all move corridors, sometimes within a season. Fifth, and most important for judging how much weight to give them: they are compiled from published fares and public carrier tariffs for the corridor. They are not derived from our own booking data, they are not a record of what any traveller paid, and they are not a price we are holding for you.
Use them for the one thing they are good for: a sanity check. A live quote inside the band means the market is behaving normally and the decision is about rules and routing rather than waiting. Well above, something is compressing supply and waiting is unlikely to help. Well below, read the fare rules carefully before you celebrate.
What a route guide cannot tell you
It cannot tell you what your dates will cost: airline revenue management reprices continuously against demand it can see and you cannot. It cannot tell you a fare will drop, because nobody can. And it cannot tell you that booking through an agency beats booking direct — on simple non-stop corridors sold by one carrier, the airline's own site is frequently cheapest, and we would rather say so than waste your call.
What it can do is tell you which questions matter on your corridor, so that when you do sit down to book — with us, with the airline, or anywhere else — you are comparing the right things. When the itinerary is complex, when the fare family choice is expensive, or when something has already gone wrong, that is when a desk earns its place. Start with how we actually book a cheap fare, and see the service fee schedule for what we charge when we work a file after ticketing.