Is the word férias the same in Brazilian and European Portuguese?

Yes

The word "férias" is identical in meaning, spelling, and grammar (it is a feminine plural noun) in both Brazilian and Continental Portuguese. The only difference is pronunciation. In Brazilian Portuguese, the vowels are typically more open and the syllables are articulated clearly with a more melodic rhythm. In Continental Portuguese, unstressed vowels are often "reduced" or nearly silent, making the word sound much shorter and more clipped.

Brazilian Portuguese Examples:

1. Eu vou viajar nas férias de verão. (I am going to travel during summer vacation.)
2. As minhas férias serão muito relaxantes. (My vacation will be very relaxing.)
3. Você já marcou suas férias? (Have you already booked your vacation?)
4. Eu estou de férias agora. (I am on vacation right now.)
5. Eu quero tirar férias logo. (I want to take a vacation soon.)

Continental Portuguese Examples:

1. Vou viajar nas férias de verão. (I am going to travel during summer holidays.)
2. As minhas férias serão muito relaxantes. (My holidays will be very relaxing.)
3. Já marcaste as tuas férias? (Have you already booked your holidays?)
4. Estou de férias agora. (I am on holiday right now.)
5. Quero ir de férias para o Algarve. (I want to go on holiday to the Algarve.)