I know exactly what you mean. Women in general do lie a lot, but don't get caught up in it. A lot of the time it's because they want to project a certain image, or it's a protection mechanism or it's all just a game to them (that usually developed due to some experience they had in the past). But even though there are a lot of girls who do lie, there are also plenty of girls who value honesty a lot and it's those ones you should be looking for.
I've personally found that 8/10 times if you're completely open and honest with others they will return the favour, so stay open and honest and when you know someone's lying to you, confront them about it or don't keep them in your life. There are plenty of honest people out there, so you really don't need to surround yourself with those who aren't. I know I certainly don't have time for liars in my life.
And if you're talking about girls as potential significant other halfs specifically then I suggest to just set your standards and stick to them. I know when I meet a new person one of the first things I say to them is this- I have 3 rules: no lying, no cheating and no hitting. Break any one of them and you're out the door". So far people have respected because I've made it clear that those are dealbreakers not to be messed with. If lying is your dealbreaker, then make that clear and don't associate with people who lie. If they can't respect that they're not worth your time anyways.