The Real Cost of a Cheap Flight: Baggage, Seats, Transfers, and Time

The five lines that matter

1. Fare. The number you see on the search result.
2. Bags. Checked bag fees each way, and increasingly, cabin-bag fees on low-cost carriers.
3. Seats. Selection fees, or the risk of a middle seat on a seven-hour flight.
4. Transfers. Getting to and from the airports on both ends. Secondary airports can add real money and an hour each way.
5. Time and risk. A 6 a.m. departure means a hotel or a sleepless night. A tight self-connection means potential rebooking costs.

Write these five lines out for the two or three options you’re seriously considering. The winner is often not the cheapest fare.

Basic economy, decoded

Legacy carriers now sell fares that mimic low-cost pricing: no checked bag, no seat selection, sometimes no cabin bag, no changes. They’re fine for a weekend with a backpack. For a two-week trip with luggage, price the standard fare too — the difference frequently disappears.

Secondary airports

Flying into Gatwick instead of Heathrow, or Narita instead of Haneda, can save money. It can also cost you a longer, pricier transfer and a later arrival. Use the airport guides to see transfer times, then decide with the full numbers.

Self-connections

Two separate tickets with a short gap between them is the classic “cheap” itinerary that becomes expensive. If the first flight is late, the second airline owes you nothing. If you want to build one, follow our layover planning guide and allow at least three hours.

Frequently asked

Are basic economy fares worth it?

Often, if you travel with only a personal item and don't care where you sit. Add a checked bag and a seat and the gap to standard economy usually closes.

Is a cheaper flight to a secondary airport a good idea?

Only when the transfer cost and time are small relative to the fare saving. A fare that is cheaper by a small amount but adds an expensive hour-long transfer is not cheaper.