It's cool that you are ready to deliver flowers to your partner. But if the question is to organize a real surprise, then it is important to find a good flower delivery service. For example, I use https://felicita-flowers.com/en-gb/saint-petersburg/ In addition to the fact that they just have a huge selection of flowers, they often deliver them anywhere. Imagine a doorbell and a bouquet of flowers, I think such surprises are just wonderful.