I followed your advices and did my own calculation for overseas flight with American Airlines and United. I found out that AA mile was 1.3 cents, and United was 1.1 miles.
@villemiami wrote:When I go to https://thepointsguy.com/guide/monthly-valuations/ , I see that an American Airlines AAdvantage mile is worth 1.7 cents, and a Wells Fargo point is 1.6 cent. But when I go to https://www.bankrate.com/credit-cards/travel/points-and-miles-valuations/#card , a AA mile and a Wells Fargo point are both work 1 cent.
So is right? Is there another web site that is more accurate than these 2 on the value of points?
There's no easy/clear answer here. I personally find The Frequent Miler to have realistic point values, which they define as Reasonable Redemption Value. They use the same criteria to evaluate each brand and tend to have lower / more conservative values.
But there are limitations - first and most importantly, they are looking at the middle-of-the-road redemptions, so if one is willing to take more time and be picky with their redemptions, they very well may see higher value. The values also do not include potential brand perks, like Hilton/Marriott's 5th night free with points, IHG's 4th night free with points, Delta's Takeoff 15 card benefit, etc, which increase value when applicable. And the values are based on certain cities, and one may find higher value outside of these cities.
As an example, my two best flight redemptions so far have been for economy out of ALB. Prices from ALB tend to be high and routes are limited, so we end up checking BDL, EWR, JFK, LGA, BOS, and even YUL for many searches, including paid and points. But once I factor in parking, gas/tolls, and potentially a hotel the night before if it's an early flight, sometimes ALB is the best value even though the prices are higher than all the others.
And that's the ultimate thing - it doesn't matter what a blog, YouTuber, or anybody else defines in terms of point value once one has some experience and knows what the points are worth, to them. Sure it's good to get a general sense before opening a card, but personal experiences win out in the long-term. Thankfully issuers offer large sign-up bonuses that allow us to test the waters, refining our set-ups with what personally works best for us over time.
Future 
Chopping Block 
P2 Chopping Block 
i consider points value on what i can reliably and consistantly get or that base level that i can redeem. Like for stuff like delta skymiles and united miles where if you have a cobranded card you can get 1cpp via pay with points or chase pay yourself back. Amex MR points with the CS Plat as 1.1cpp, BoA points at 1cpp, Chase UR at 1cpp.
If i can get more value then great, but im not disappointed if i cant.
