NHS staff can also choose three other people who are travelling with them to receive the discount.
Announcing the offer, Turkish Airlines said: "Turkish Airlines started a new campaign for the healthcare workers who are working selflessly to combat the Covid-19 pandemic.
"With this campaign, all healthcare workers working around the world will be able to fly at 40 per cent discount with their tickets purchased from Turkish Airlines webpage or mobile application.”
When is the discount valid until?
The discounted tickets will be available until July 18 and will be valid for travel until May 2021.
"Valid for all flights and ticket types of the flag carrier airline, during the campaign, healthcare workers along with three people traveling with them will be able purchase the discounted tickets,” the airline said.
"Healthcare workers who wish to join the campaign must apply at the campaign page at the Turkish Airlines webpage until July 18, 2020.
"Passengers who applied to the campaign will have the advantage of flying at 40 per cent discount between June 8, 2020 - May 31, 2021 as long as tickets are purchased between June 8 – August 1."
The airline took to Twitter to say, “We are forever thankful to health workers!
“Now it’s time to enjoy the privileges of flying with 40% discount for health workers and their loved ones.”
Will there be an air bridge with Turkey?
Turkey's Transport Minister, Adil Karaismailoglu, has said that his country plans to resume flights with around 40 countries in June.
Mr Karaismailoglu confirmed Turkey has reached preliminary agreements for reciprocal air travel with 15 countries.
According to the Financial Times, Brits could be able to visit by the middle of July, and it's understood that government officials in various popular Brit holiday destinations hope for "air bridge" deals.
An air bridge is an agreement between the UK and another country, which will then let people travel freely between those two nations without having to go into quarantine when they arrive.
This would prevent tourists and those returning to Britain from having to isolate for 14 days when they enter the UK, which is a policy that has now come into force.
Turkish Airlines is now also offering daily flights between London’s Heathrow and Istanbul airport.
The Turkish Airlines flights depart Istanbul airport at 8.20am, arriving into Heathrow at 10.25pm, with the return leg leaving London at 12.50pm and landing back into Istanbul at 18.40pm.
Earlier this month, Turkish Airlines also published new health and safety guidelines in the light of the Covid-19 crisis. This includes contactless check-in and boarding, temperature checks and PPE for crew, and a hygiene kit being provided for passengers.