Depends upon amount of Gap between two teeth ..multiple options like composite veeners , ceramic veeneers are available ranges from 2k upto 25 k

Orthodontic therapy is the best approach in this case but if you don't want to go for braces you can always opt for clear aligners which provide predictable results with warranty certificates. The duration of this treatment will be somewhere close to the duration with braces treatment and that will be approximately one and a half to two years. Short duration treatment modalities like laminates or metal free Zirconia crowns can also be opted for but the applicability of any treatment modality in your case can be judged after a proper clinical evaluation of the case. Please visit a dentist for the same. Regards