I wear Jobst For Men and Jobst Activewear (the first are more like dress socks and the second more like sports socks). They are the best of the over-the-counter brands I have tried. They range from about $25 to $60 per pair depending on strength (expressed in "hg" ... inches of pressure they exert) and size. Because my clots have been in my calf I wear the knee high variety. There are thigh high ones too if you clot above the knee. Here's an example link since you asked about Amazon: https://www.amazon.com/gp/product/B001O1F36U/

I wear the 15 - 20hg daily because it eliminates any leg swelling I get if I don't wear them.

I would ask your doctor about them too, especially if you are diabetic. My doctor says they are entirely optional, as there are some studies that suggest they don't help with reducing clots in daily use, even the 20 - 30hg or 30 - 40 hg ones. Because they reduce my leg swelling I use them even in the face of the questions my doctor has about them (he doesn't see any harm in using them, even if they are not effective in the studies).

That's his opinion, not mine, so don't flame me!

I like the Activewear I linked the best. They are padded which helps with my neuropathy. Follow the sizing chart for your ankle and calf measurement and you will likely get a good fit.

The 15 - 20 hg ones like in my link are not that hard to put on ... I reach inside and grab the heel, then pull so the sock is inside-out from the heel to the top. Then I reach in and expand the foot portion so my foot can go in easily (my foot is numb so I don't know if I'm hurting it during putting the socks on). I stick my foot in and work the sock over the foot and around the heel, then I work and roll / pull the rest of the sock up over my calf. They don't fit tight in the foot section, but rather like "regular" socks.

Try them at home before going on the trip. There are rare occasions where people have reactions to the tightness, or bruising, so you want to be experienced with them before taking that long flight.