18 yrs old and want to remove fat in my flanks and stomach. Am I a good candidate for liposuction? (photos)

Thank you for your question and images. Based off of your information provided you look to be a great candidate for liposuction alone. Your age indicates that you should have good skin retraction once the minimal fullness is taken down. You can expect to wear a post-surgical garment to help with compression for about 4-8 weeks depending on your physicians guidelines. It is important to find a qualified board certified physician that can do a full assessment and tailor a treatment plan that will help you achieve your desired results.

Yes, based on your photos, you are a good candidate for liposuction of the abdomen and flanks.
If you continue a healthy diet and exercise you may stay at a healthy weight for your entire life.
Regardless of future weight changes, you can consider treating the areas you don't like now, particularly since the fat has been there for a long time, even with an active lifestyle and good diet.
Liposuction will work, and an alternative is Coolsculpting.
Liposuction will remove the fat in one session, Coolscultping may take more sessions.
As a surgeon, I prefer doing liposuction as I see the fat come out and the result on the operating table, however, I know that with a very good Coolsculpting technician you can also get a good result.
It is a good idea to reduce/quit your nicotine use as it improves healing, which can then help obtain a better result.
All the best to you,
Dr. Nancy de Kleer