The airline said it wanted to give its passengers extra security as the troubled airline industry emerges from the coronavirus pandemic.
Swiss resumed some flights in June after taking on substantial losses during the coronavirus pandemic lockdown.
All customers, regardless of ticket price or flight category, will benefit from the guarantee.
In the case of an emergency, passengers would be flown back to Switzerland, Germany or Austria via the airlines of the Lufthansa group.
The airline is also offering additional insurance options in case of quarantine and other unexpected costs.
The ‘Economy Classic’ and ‘Business Saver’ options provide additional guarantees, for example to cover the costs of mandatory quarantines, for instance if passengers are unable to enter the country due to increased temperatures or other requirements.
In this case, the airline will cover the cost of the quarantine or organise return transport.
Swiss have also set up a ‘Bring Me Home Now’ option, which gives customers a guarantee that they will be returned home within 48 hours on a flight or flights from the Lufthansa group if they request it.
The option will be available from June 25th and will apply to return flights until January 2021.