How do I rebook to the lowest fare in Amadeus (FXB)?

FXB finds the lowest available fare on the same flights, rebooks the classes and stores it in a TST; FXR shows it without storing. FXB/K keeps the cabin, so nobody is moved to a lower one.
Unofficial guide, written with AI
GateRoam's own guide, written in our own words with the help of AI tools. It is not official Amadeus documentation and has not been reviewed or approved by Amadeus. It can contain mistakes: try every entry in the Amadeus training office first, or check Amadeus's own help, before you use it on a live booking.

When

The flights are right but the booked class may not be the cheapest — you want Amadeus to find the lowest available fare on the same flights and rebook to it.

Steps

#EntryWhat it doesWhy
1FXBFinds the lowest available fare, rebooks the classes and creates a TST.Cheapest price in one step.
2FXRSame, but without a TST.Look first, store later.
3FXB/K · FXB/KCKeeps the cabin grade · stays in business.Avoid being moved to another cabin.
4FXB/R,*NPELowest fare without penalties.The client wants flexibility.
5RTA · TQTShows the new classes · the stored fare.Check what changed.

Check it worked

RTA shows the segments in the new classes (status HK); TQT the new fare.

Traps

  • FXB rebooks. The seats move to another class; if availability fails, you may lose the original class. On married connections the rebook may be refused.
  • FXB needs names in the PNR; FXR can work without if the office allows it.
  • The lowest fare usually has the strictest rules — read FQN before ticketing.
  • Use FXB/K on mixed-cabin trips or premium economy, or it may downgrade.

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