By this weekend, Ukrainians can fly domestically from Kyiv Boryspil, Kherson, Lviv and Odesa by showing their digital passports in their Diya app. “Show the smartphone screen at the air security control point to read the QR code,” Infrastructure Minister Vladyslav Krikliy writes on his Facebook page. “After that, the passenger is allowed to fly.” To take trains, students can show their Diya student IDs, and Diya digital drivers licenses also work for train travel. In the six months since Diya was launched, several million Ukrainians have downloaded the app.