Free tool

Flight True-Cost Comparator

A £29 fare can end up dearer than a £59 one. Enter the real costs of two flights, including the add-ons each airline charges for, and we'll show you which is genuinely cheaper, and by how much.

✈️ Option A

£
£
£
£
All-in£0.00

✈️ Option B

£
£
£
£
All-in£0.00

Calculated on your device. Nothing you enter is sent to us or stored.
This tool compares figures you enter; it doesn't fetch live fares or fee schedules. Airline charges vary by route, bag size, time of booking and how you pay, always use the airline's own quote for the most accurate comparison.

The add-ons that flip the deal

Low-cost airlines make the headline fare as low as possible and charge separately for the rest. Add a few of these and the "cheap" flight often isn't:

  • Checked and cabin bags, frequently the biggest extra, and pricier if you add them after booking or at the airport.
  • Seat selection and priority boarding, optional, but families and groups often feel pushed into them.
  • Airport transfers, a "cheaper" airport that's far from the city can cost more once you factor in the train or taxi.
  • Payment and admin fees, some fares cost more depending on the card you use.

For the full playbook, read how to find cheap flights. Comparing hotels too? Use the hotel true-cost calculator.