Multi-City vs Round-Trip PNR: How to Read the Difference

At a glance, a multi-city PNR and a round trip can look similar — both have multiple segments. The distinction matters for fare construction and for correctly explaining the itinerary to a client, so here's how to tell them apart quickly.

What Makes a Round Trip

A round trip is simple: the passenger flies from City A to City B, then back from City B to City A. The final destination equals the original origin.

1  BA 284 H 15JUL 2*LHRJFK HK1 1120A 215P
2  BA 117 H 22JUL 2*JFKLHR HK1  600P 605A/23JUL

Segment 1 goes LHR → JFK. Segment 2 goes JFK → LHR. Same two cities, reversed — a straightforward round trip.

What Makes a Multi-City Itinerary

A multi-city (or "open jaw" in some cases) itinerary involves different city pairs across segments — the passenger doesn't simply retrace their outbound route.

1  BA 284 H 15JUL 2*LHRJFK HK1 1120A 215P
2  AA 100 H 20JUL 1*JFKLAX HK1  800A 1105A
3  BA 269 H 25JUL 3*LAXLHR HK1  700P 105P/26JUL

Here, the passenger flies LHR → JFK, then JFK → LAX, then LAX → LHR. Three distinct city pairs, only returning to the original origin on the final segment — this is a multi-city trip, not a round trip.

Why the Distinction Matters

• Fare construction — multi-city itineraries often price very differently from a simple round trip, sometimes as separate one-way fares combined
• Client communication — describing a 3-city trip as a "round trip" to a client is confusing and can cause them to misunderstand their own routing
• Layover vs. stopover confusion — a multi-city segment gap is a deliberate destination, not a connection, and shouldn't be flagged as a "layover" the way a same-day connection would be