Why a One-Way Plane Ticket Can Cost More Than a Round Trip
Cheap tickets are discounts for vacationers who book early and stay the weekend, while business travelers who cannot do either pay full price.
Wendover Productions · How Airlines Price FlightsBuy a one-way ticket from New York to London and you might pay $2,772. Add a return flight a week later and the total falls to $602.
The seat is the same. The difference is the rules hidden inside the price.
Every airline fare comes with a fare code, a letter like Q, N, S, or Y that carries a set of restrictions. On a domestic hop like the 2,469 miles from New York to Los Angeles, those restrictions are simple, mostly blackout dates and how far in advance you buy. Pay $129 if you book weeks ahead, pay more if you wait.
On the 3,442 miles from New York to London, the codes add another test: how long you stay. The cheapest round-trip fares require you to spend a Sunday at your destination, or a full seven days. That is no accident. Business travelers often prefer to spend the weekend at home, so they cannot stay that long. Vacationers, who pay for their own tickets and shop on price, can.
The higher the fare, the shorter the required stay. Pay about $2,000 and you can come back after three days. The cheapest fare that lets you return at any time lists at $5,544 in fare class Y, twice the one-way cost.
That is why the one-way looks upside down. When you buy a one-way, the airline does not know when, or if, you will return, so it cannot give you a discount meant for someone who stays the weekend. It must put you in the least restrictive, most expensive bucket.
It works the other way on the Los Angeles route, where there is no stay rule. A $129 trip each way simply doubles to $257 for a round trip.
This is price discrimination, which lets different travelers pay what each can manage, and so lets companies offer the same seat to more buyers.
Questions people ask
If I want the cheap fare, do I really have to stay through Sunday?
Yes. On this route the cheapest fares require a Sunday at your destination, and others require a full seven days. If you can include that stay, you can often unlock the lower price.
Does a $5,000 ticket get you a better seat than a $600 ticket?
No. The seat is the same. You are paying for flexibility, since the expensive codes let you book late, leave quickly, and fly one-way without a stay requirement.
Why does booking early save money?
Advance-purchase rules reserve cheaper buckets for people who commit weeks ahead, when plans are uncertain. Business trips often come up days before departure, when only the expensive, last-minute buckets are left.