Open-Jaw and Multi-City Tickets, Without the Guesswork

Elena Vasquez · March 5, 2026 · 9 min read

Here is a trip that almost everyone books badly. Two weeks in Portugal, starting in Lisbon and finishing in Porto. The instinct is to buy a return to Lisbon and then add a domestic hop or a three hour train back at the end. The alternative, flying home from Porto on the same ticket, is called an open jaw, and it frequently costs the same or less.

Quick facts

• An open jaw is a return ticket where one end does not match. Either you fly home from a different city, or you fly out from a different one.
• Multi-city is the general term for any itinerary with more than two points, priced as a single ticket.
• Both are supported by every major airline booking engine, usually under a tab labelled multi-city.
• Pricing is not the sum of two one ways. It is calculated by the fare engine as a single journey.
• Baggage, protection and rebooking all apply across the whole ticket, which is the main advantage over separate bookings.

The three shapes

Destination open jaw

Out to city A, home from city B. London to Rome, then Venice back to London. You cover the ground between Rome and Venice yourself, by train in this case, and you never backtrack.

Origin open jaw

Out from your home city, home into a different one. Less common for leisure, very useful for people who live between two airports or who are ending the trip at a relative's house in another region.

Double open jaw

Both ends differ. Manchester to Athens, then Thessaloniki to Birmingham. The fare engine handles it, though availability narrows and some fare types disallow it.

How the pricing actually works

Airline fare engines construct a price from fare components, then apply the rules of the governing fare. For a round trip the engine typically halves the return fare for each direction. An open jaw is priced the same way, taking half the return fare from each of the two city pairs involved.

Ten pounds against a three hour train and a wasted afternoon is a straightforward trade. The comparison shifts when one of the two cities is served by very few carriers, in which case the more expensive half drags the total up.

When multi-city genuinely wins

1. Long haul with a deliberate stop. New York to Tokyo with a week in Seoul on the way home is priced as one journey, and the intermediate sector is often nearly free.
2. Business trips visiting several cities. One ticket means one baggage allowance, one set of protections, and rebooking across all sectors if the first one is late.
3. Regions with expensive internal flights. South America and Australia both punish separate domestic bookings, so building them into the international ticket is worth pricing.
4. Award redemptions. Many programmes permit a free stopover on a single award, which is by far the best value in the whole loyalty ecosystem.

Stopover versus layover

A layover is a connection under 24 hours on international itineraries, or under four hours domestically in the US. A stopover is longer, and it turns the connection point into a destination.

Several airlines actively encourage stopovers because it fills seats on their hub sectors. Icelandair has offered a Reykjavik stopover at no extra airfare for years. TAP Portugal does the same in Lisbon or Porto. Finnair, Singapore Airlines, Emirates and Turkish Airlines all run versions of the idea, sometimes bundling hotel nights.

The rules that catch people out

• Minimum and maximum stay conditions still apply. A fare requiring a Saturday night stay applies that rule to an open jaw as well.
• The surface sector, the part you travel yourself, sometimes counts toward mileage limits on complex fares.
• Not every fare basis permits an open jaw. Deep discount and basic fares frequently do not, which is why the search returns nothing rather than a price.
• Changing one sector of a multi-city ticket can reprice the entire journey, and the reprice can be substantial.
• Baggage allowance is set for the whole ticket, which is usually good news on mixed short and long haul itineraries.

Booking checklist

1. 01

   Sketch the trip on paper first

   Cities, dates, and how you plan to cover the ground between the open points. If the surface leg is more than half a day, reconsider.

2. 02

   Use the multi-city tab, not two searches

   Separate searches will not reveal the through fare, which is the whole point.

3. 03

   Price the alternatives side by side

   Straight return, open jaw, and two one ways. Note the total including bags, not the headline.

4. 04

   Check the ground leg cost and timing

   A cheap open jaw that requires an expensive internal flight is not cheap.

5. 05

   Verify each sector's operating carrier

   Multi-city itineraries mix airlines more often than returns do, which affects baggage and check in.

6. 06

   Confirm the whole thing is one ticket number

   One ticket number across all sectors is the protection you are paying for.