https://www.cnet.com/news/last-minute-valentines-day-gifts-amazon-will-deliver-flowers-chocolates-in-2-hours/

Now, although Amazon touts free 2-hour delivery for the aforementioned roses, the reality is that you must spend at least $35 -- regardless of what you buy -- otherwise there's a $4.99 delivery charge.

What's more, you'll have to enter your Zip code to make sure 2-hour delivery is available in your area. At this writing, the service covers around 60 US cities.