How to Plan a Multi-City Flight Itinerary

A multi-city itinerary is any trip that is not a simple out-and-back. They are more useful than most travellers realise and priced more strangely than most expect.

The shapes

Open jaw. You fly into one city and out of another, covering the gap by land. LHR → CDG, then train to Amsterdam, then AMS → LHR. The “jaw” is the leg you do not fly. Often priced almost identically to a plain return, and it removes a pointless backtrack.

Double open jaw. Both ends differ: MAN → CDG, ground to Amsterdam, AMS → LHR. Useful when you live between two airports.

Stopover. A deliberate break of more than 24 hours on the way to a destination, on the same ticket. LHR → DOH → SIN with three days in Doha. Several airlines actively encourage it and some charge nothing extra.

True multi-city. Three or more distinct destinations in sequence — LHR → DXB → BKK → SIN → LHR.

Circle trip. A multi-city that returns to where it started, priced as a single fare.

When a single multi-city fare wins

Book as one ticket when:

The legs are on the same airline or within one alliance
The journey is a coherent circle or open jaw rather than unrelated hops
You want the airline responsible for the connections
A stopover is included at little or no extra cost
You are crossing an ocean — long-haul multi-city fares are frequently far better than the sum of the parts

When separate tickets win

Book separately when:

Low-cost carriers serve the legs, since they rarely participate in multi-city fares
The gaps are long enough that connection protection is irrelevant
The legs are in genuinely different regions with different best carriers
One leg is far cheaper on an airline that cannot be combined with the others

The trade is always the same. One ticket costs flexibility and buys protection. Separate tickets cost protection and buy price.

The risk that only appears on complex trips

On a multi-city trip built from separate tickets, a delay does not just affect one connection — it cascades. Miss the second leg and the third, fourth and fifth are still ticketed for times you can no longer make. Many fares treat a no-show on one segment as grounds to cancel the remainder.

Two defences:

Build buffer days, not buffer hours, between separately ticketed legs on a long trip. An overnight in the connecting city converts a missed connection from a crisis into an inconvenience.

Know your fare’s no-show rule before you rely on the later legs.

Sequencing

Order the legs geographically wherever the schedule allows. Each backtrack adds distance, cost and time. Put the distance calculator or the multi-city trip planner on the routing and the inefficiency shows up immediately as kilometres.

Two subtleties worth knowing:

The shortest route on a map is not the shortest route. Great-circle paths on a sphere look bent on a flat map. A London–Tokyo flight over the Arctic is shorter than one that looks straighter on a Mercator projection.

Direction affects duration, not distance. Eastbound flights are typically faster than the same route westbound because of the jet stream. The distance is identical; the block time is not.

Dates across a long trip

On a multi-city trip crossing several time zones, date errors compound. Each leg’s arrival date becomes the next leg’s departure baseline, and one mistake propagates through the rest of the trip and into every hotel booking attached to it.

Compute each arrival explicitly rather than assuming. The time zone planner does a leg at a time; the multi-city planner chains them.

Watch particularly for the International Date Line — see flight time zones.

Sketching the whole thing first

Multi-city trips are exactly the case where laying the plan out before pricing pays off, because the number of plausible orderings grows quickly and the differences are large.

The sample itinerary generator will take a multi-city routing and lay it out with distances, times and arrival dates as a printable sample — a planning artefact, clearly watermarked, with no pretence of being a booking. Once the shape is right, take it to an airline or agent to price.