Wizz Air announced on March 2 that it would assist Ukrainian refugees by providing 100,000 free seats on all continental Europe flights departing from Romania, Poland, Slovakia, and Hungary.
Furthermore, because many refugees have already begun to move and may be stranded in other locations, the airline offers a EUR 29.99 rescue fare on all other flights (excluding flights to the UAE, Iceland, and the Canaries), as well as a EUR 69.99 rescue fare on all flights to the UAE, Iceland, and the Canaries.

The 100,000 free seats and the rescue fares will be available for travel throughout March. Passengers will be required to provide their Ukrainian passport/ID card number at the time of booking and show their Ukrainian passport/ID card at the time of check-in.
“Wizz Air has already added larger planes and extra flights from border countries to Europe to help support the movement of refugees as necessary.”
Wizz Air press release
Ukrainian refugees who want to book a flight with Wizz Air can do so here!