One-way vs return flights: which is actually cheaper?
On South African domestic routes a return fare is often just two one-ways added together — which means splitting the trip costs you nothing and can win you a better airline in one direction.
Written and checked by Kyle Govender, founder and editor · Johannesburg · last verified 17 September 2026
The domestic reality
On long-haul international tickets, returns are frequently much cheaper than two one-ways, because fare rules are built to punish splitting. On South African domestic routes that logic largely does not apply. Low-cost carriers price each leg on its own, so a return is usually just addition.
That has a useful consequence: you can shop each direction separately at no penalty, and quite often the cheapest outbound and the cheapest inbound are on different airlines or at different times of day.
How to run the comparison so the answer is real
Do three searches, not one.
Search one: the trip as a return. Note the total.
Search two: the outbound only, as a one-way.
Search three: the inbound only, as a one-way.
Then add searches two and three and compare against search one. The trap is comparing an inclusive return fare against two stripped one-way fares. If the return includes a checked bag and the one-ways do not, you are not comparing anything. Price the bag in before you decide — our baggage allowance guide has what each airline actually charges.
What you give up when you split
| Construction | What you gain | What you risk |
|---|---|---|
| Single return ticket | One booking, one reference, one phone call when something goes wrong | Locked to one airline's schedule in both directions |
| Two one-way tickets | Mix airlines, airports and times freely; often a better fit to your actual day | Two independent bookings that change, delay and fail independently |
| Separate tickets on a connection | Can expose genuinely cheaper combinations | Miss the connection and nobody owes you the next flight. This is the one that hurts. |
| Open-jaw (fly into one city, out of another) | Excellent for road trips — fly into George, drive the Garden Route, fly out of Gqeberha | You own the ground transfer and any timing it imposes |
The distinction that actually matters
Two one-way tickets on a point-to-point trip are completely fine. Johannesburg to Cape Town on Tuesday, Cape Town to Johannesburg on Friday, different airlines, no connection involved. Each leg stands alone and nothing about the split exposes you.
Two separate tickets across a connection are a different animal. If you build your own Johannesburg–Cape Town–George itinerary on two tickets and the first flight runs late, the second airline is under no obligation to you. You bought a seat on a flight you missed. Passengers do this to save R300 and lose a night in a hotel.
If you must self-connect, leave a genuinely generous gap — and understand you are self-insuring.
When splitting is clearly worth it
Your directions are asymmetric. Leaving on a Friday evening and coming back on a Tuesday morning are very different pricing environments. Different airlines win each.
Your return date is uncertain. Buy the outbound now, decide later. On flexible-ish domestic fares this often beats paying a change fee on a return.
You want Lanseria one way. Flying out of Lanseria and back into OR Tambo is trivially easy on two one-ways and awkward on a return.
One direction is an overnight. The cheapest fare at 06:00 outbound and the cheapest at 19:00 inbound are rarely the same carrier.
For the timing side of this, our guide on when to book flights in South Africa covers the booking windows that move the price more than the construction does.
Questions people actually ask
Are return flights cheaper than two one-way flights in South Africa?
Not automatically. On domestic routes, low-cost carriers generally price each leg independently, so a return is often simply two one-ways added together. Always price both ways before assuming the return wins.
Is it risky to book two one-way tickets?
On a point-to-point trip with no connection, no. Each leg stands alone. The real risk appears when you use separate tickets across a connection, because if the first flight is late the second airline has no obligation to rebook you.
What is an open-jaw ticket?
A trip where you fly into one city and out of another, such as flying into George and out of Gqeberha with a Garden Route drive in between. It is often cheaper than doubling back and can save a full day of driving.
Should I include baggage when comparing?
Yes, and it is the most common mistake. An inclusive return fare compared against two bag-free one-way fares is not a real comparison. Add the checked bag cost to each option before deciding.
Can I mix airlines on the outbound and return?
Yes, if you book them as two separate one-way tickets. This is one of the main advantages of splitting, since the cheapest carrier outbound is frequently not the cheapest coming back.