Most travel sellers stop earning the moment the booking confirms. The flight is ticketed, the confirmation email goes out, and every extra the traveller buys after that point is bought somewhere else. Usually on the airline's own site, using the reference number you gave them.
In short
Post-booking ancillary checkout means selling seats, bags, and other extras after the booking is confirmed rather than during it. It works because the traveller has already committed to the trip, so the decision is no longer competing with the price of the fare. DepartCart adds that checkout to a flow you already own.
Why the window after booking converts better
At the point of booking, every extra is competing with the fare itself. The traveller is comparing prices across four tabs, and a seat fee is a reason to switch. That pressure disappears once the booking is made. The trip is now real, the money is already spent, and the question changes from "is this the cheapest option" to "how do I want this trip to go".
That is a different buyer, in a better mood, with a decision that is no longer price-anchored against a competitor.
What DepartCart puts in the cart today
Four products are live, sold, and written back to the reservation.
| Product | Priced from | Written back to the booking |
|---|---|---|
| Seat selection | The airline's map for that itinerary | Yes |
| Extra bags | The fare's filed baggage content | Yes |
| Refund protection | A percentage of the booking | Yes |
| Priority support | Your own tiers | Yes |
Seat selection is the anchor product, and the reason it works is accuracy. A seat map that shows the wrong cabin layout costs you the sale and earns you a support ticket. DepartCart draws from researched cabin layouts rather than from a generic seat grid.
The catalogue is wider than seats and bags
A post-booking cart is not a seat-selling tool that happens to carry other things. It is a merchandising surface, and the same offer-and-fulfil shape holds for anything a traveller might want between booking and departure.
Lounge access is a natural second item, because a long connection is exactly when it is worth buying. Connectivity is a destination product rather than a flight product, which is why the post-booking window suits it better than the booking flow does. Ground transport is where the catalogue stops being air only, and it is the clearest bridge to rail, cruise, and tour itineraries.
Three ways in, depending on how much control you want
Tag manager
The lowest-effort route. The cart is introduced through your existing tag manager, so it needs no release from your engineering team and can be turned off as quickly as it was turned on. Good for proving the revenue before committing a roadmap slot.
Hosted page
The traveller moves to a page we host and style to your brand. You get more control of the experience than a tag manager gives you, without owning the front end.
API
You build the presentation and call the platform for offers and fulfilment. Complete control, and the right choice when the post-booking experience is part of your product rather than an addition to it.
Most partners start with the tag manager route and move deeper once the revenue is proven. That order is deliberate: it puts the commercial question first and the engineering question second.
Frequently asked questions
Do we have to replatform to use a post-booking cart?
No. The cart is added to the page a traveller already lands on after booking, and it can be introduced through your tag manager, as a hosted page, or through the API, depending on how much control you want.
Which bookings can it work with?
Bookings held in Sabre, with ancillaries sourced through both ATPCO filed content and NDC. Seat maps and bag offers come from the airline for that specific itinerary rather than from a generic table.
What happens after a traveller pays?
The purchase is written back to the reservation automatically, so no agent has to touch it and the traveller sees the extra reflected in their booking.
How long does an integration usually take?
It depends entirely on which route you take. A tag manager rollout is measured in days because it needs no release from your engineering team. A full API integration is a project, and it buys you complete control of the presentation.