# Interline

Interline describes travel that involves more than one airline under agreements that let the journey work as one trip.

Interline travel is a journey that involves more than one airline under
commercial agreements that let the trip be sold, ticketed, and handled as a
connected itinerary. It matters because the traveller sees one journey, while
the seller and airlines must coordinate rules, responsibility, pricing, and
servicing across carriers.

## What interline means

An interline trip joins flights from different airlines into one journey. The
airlines are not simply appearing beside each other in search results. They have
commercial arrangements that allow the journey to be combined and handled in a
coordinated way.

For a traveller, the result can look simple: one trip from origin to
destination. Behind that simple presentation are rules about whose fare applies,
how travel is ticketed, what happens when plans change, and which airline owns
which part of the experience.

## How it differs from codeshare

Interline and codeshare often appear together, but they are different concepts.
Codeshare is about one airline marketing a flight operated by another airline.
Interline is about the ability to combine airlines on a journey.

A trip can be interline without being codeshare, and a codeshare flight can sit
inside a wider interline journey. The practical question is what the seller is
presenting and which rules apply after the booking is made.

## Why it matters commercially

Interline creates reach. It lets a seller offer journeys that one airline could
not operate alone. It also creates more complexity when paid options, changes,
refunds, and disruption handling need to be explained clearly.

Good merchandising keeps the journey context visible, especially when different
carriers are responsible for different parts of the trip.

## Frequently asked questions

### What does interline mean?

It means a journey involves more than one airline, with agreements that allow the trip to be sold and handled together.

### Is interline the same as codeshare?

No. Interline is about airlines accepting each other's travel on a journey, while codeshare is about marketing a flight under another airline code.

### Why does interline matter for sellers?

It affects how the trip is displayed, priced, serviced, and explained when more than one airline is involved.