Azul vuelos desde Rio de Janeiro Galeao (GIG) a Belo Horizonte (CNF).

HORARIO DE VUELOS
Vuelos directos:
Vie 13:10 Rio de Janeiro Galeao (GIG) 2 14:15 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:05 Operates only on 2026-01-02
Mie,Jue 13:20 Rio de Janeiro Galeao (GIG) 2 14:25 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:05 Valid until 2026-01-01
Lun-Vie 13:20 Rio de Janeiro Galeao (GIG) 2 14:25 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:05 Effective 2026-02-16 through 2026-02-20
Lun-Vie 13:25 Rio de Janeiro Galeao (GIG) 2 14:30 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:05 Effective 2026-02-02 through 2026-02-06
Lun-Mie,Vie 13:25 Rio de Janeiro Galeao (GIG) 2 14:25 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:00 Effective 2026-02-09 through 2026-02-13
Jue 13:25 Rio de Janeiro Galeao (GIG) 2 14:30 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:05 Operates only on 2026-02-12
Dom 13:35 Rio de Janeiro Galeao (GIG) 2 14:40 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:05 Effective 2026-01-04 through 2026-01-25
Dom 13:35 Rio de Janeiro Galeao (GIG) 2 14:40 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:05 Effective 2026-02-08 through 2026-02-22
Lun-Vie,Dom 13:35 Rio de Janeiro Galeao (GIG) 2 14:40 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:05 Effective 2026-02-23 through 2026-06-28
Lun-Vie,Dom 13:35 Rio de Janeiro Galeao (GIG) 2 14:40 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:05 Effective from 2026-08-03
Dom 13:55 Rio de Janeiro Galeao (GIG) 2 15:00 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:05 Operates only on 2026-02-01
Sab 14:35 Rio de Janeiro Galeao (GIG) 2 15:40 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:05 Operates only on 2026-02-21
Sab 14:40 Rio de Janeiro Galeao (GIG) 2 15:45 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:05 Effective 2026-01-03 through 2026-01-10
Sab 14:40 Rio de Janeiro Galeao (GIG) 2 15:45 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:05 Operates only on 2026-01-31
Sab 14:40 Rio de Janeiro Galeao (GIG) 2 15:45 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer E195-E2 (295) 1:05 Operates only on 2026-02-07
Sab 14:40 Rio de Janeiro Galeao (GIG) 2 15:45 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:05 Operates only on 2026-02-14
Sab 14:40 Rio de Janeiro Galeao (GIG) 2 15:45 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:05 Effective from 2026-02-28
Sab 14:50 Rio de Janeiro Galeao (GIG) 2 15:55 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:05 Effective 2026-01-17 through 2026-01-24
Lun-Vie 17:55 Rio de Janeiro Galeao (GIG) 2 18:55 Belo Horizonte (CNF) Azul AD 4205 Non-stop Embraer EMB 195 (E95) 1:00 Effective 2026-01-05 through 2026-01-30
Lun-Vie,Dom 17:10 Rio de Janeiro Galeao (GIG) 2 18:15 Belo Horizonte (CNF) Azul AD 4437 Non-stop Embraer EMB 195 (E95) 1:05 Effective from 2026-02-23
Sab 19:05 Rio de Janeiro Galeao (GIG) 2 20:10 Belo Horizonte (CNF) Azul AD 4437 Non-stop Embraer EMB 195 (E95) 1:05 Effective from 2026-02-28
Diario 06:10 Rio de Janeiro Galeao (GIG) 2 07:15 Belo Horizonte (CNF) Azul AD 4505 Non-stop Embraer E195-E2 (295) 1:05 Valid until 2026-02-22
Diario 06:10 Rio de Janeiro Galeao (GIG) 2 07:15 Belo Horizonte (CNF) Azul AD 4505 Non-stop Embraer EMB 195 (E95) 1:05 Effective from 2026-02-23
Dom 20:25 Rio de Janeiro Galeao (GIG) 2 21:30 Belo Horizonte (CNF) Azul AD 4752 Non-stop Embraer EMB 195 (E95) 1:05 Effective 2026-02-08 through 2026-02-22
Lun,Jue 20:45 Rio de Janeiro Galeao (GIG) 2 21:50 Belo Horizonte (CNF) Azul AD 4752 Non-stop Embraer E195-E2 (295) 1:05 Valid until 2026-01-01
Lun-Vie,Dom 20:50 Rio de Janeiro Galeao (GIG) 2 21:55 Belo Horizonte (CNF) Azul AD 4752 Non-stop Embraer EMB 195 (E95) 1:05 Effective from 2026-02-23
Lun-Vie 20:55 Rio de Janeiro Galeao (GIG) 2 22:00 Belo Horizonte (CNF) Azul AD 4752 Non-stop Embraer E195-E2 (295) 1:05 Effective 2026-02-02 through 2026-02-16
Mar 20:55 Rio de Janeiro Galeao (GIG) 2 22:00 Belo Horizonte (CNF) Azul AD 4752 Non-stop Embraer E195-E2 (295) 1:05 Operates only on 2026-02-17 This is a Non-scheduled Passenger flight.
Mie-Vie 20:55 Rio de Janeiro Galeao (GIG) 2 22:00 Belo Horizonte (CNF) Azul AD 4752 Non-stop Embraer E195-E2 (295) 1:05 Effective 2026-02-18 through 2026-02-20
Lun,Mie-Vie 21:25 Rio de Janeiro Galeao (GIG) 2 22:30 Belo Horizonte (CNF) Azul AD 4752 Non-stop Embraer E195-E2 (295) 1:05 Effective 2026-01-05 through 2026-01-30
Dom 21:10 Rio de Janeiro Galeao (GIG) 2 22:15 Belo Horizonte (CNF) Azul AD 4753 Non-stop Embraer EMB 195 (E95) 1:05 Operates only on 2026-02-01
Lun-Vie 09:25 Rio de Janeiro Galeao (GIG) 2 10:30 Belo Horizonte (CNF) Azul AD 4932 Non-stop Embraer EMB 195 (E95) 1:05 Effective from 2026-02-23
Sab 09:30 Rio de Janeiro Galeao (GIG) 2 10:35 Belo Horizonte (CNF) Azul AD 4932 Non-stop Embraer EMB 195 (E95) 1:05 Effective from 2026-02-28
Dom 09:40 Rio de Janeiro Galeao (GIG) 2 10:45 Belo Horizonte (CNF) Azul AD 4932 Non-stop Embraer EMB 195 (E95) 1:05 Effective from 2026-03-01
Lun-Mie,Vie,Sab 01:15 Rio de Janeiro Galeao (GIG) 2 02:20 Belo Horizonte (CNF) Azul AD 9021 Non-stop Embraer E195-E2 (295) 1:05 Valid until 2026-01-03 This is a Non-scheduled Passenger flight.
Lun-Sab 01:15 Rio de Janeiro Galeao (GIG) 2 02:20 Belo Horizonte (CNF) Azul AD 9021 Non-stop Embraer E195-E2 (295) 1:05 Effective 2026-01-08 through 2026-02-02 This is a Non-scheduled Passenger flight.
Sab 01:15 Rio de Janeiro Galeao (GIG) 2 02:20 Belo Horizonte (CNF) Azul AD 9021 Non-stop Embraer E195-E2 (295) 1:05 Operates only on 2026-02-14 This is a Non-scheduled Passenger flight.
Mie 10:55 Rio de Janeiro Galeao (GIG) 2 12:00 Belo Horizonte (CNF) Azul AD 9023 Non-stop Embraer E195-E2 (295) 1:05 Operates only on 2026-02-04 This is a Non-scheduled Passenger flight.
Dom 14:40 Rio de Janeiro Galeao (GIG) 2 15:50 Belo Horizonte (CNF) Azul AD 9038 Non-stop Embraer EMB 195 (E95) 1:10 Operates only on 2026-02-22 This is a Non-scheduled Passenger flight.
Mar 21:30 Rio de Janeiro Galeao (GIG) 2 22:35 Belo Horizonte (CNF) Azul AD 9115 Non-stop Embraer E195-E2 (295) 1:05 Operates only on 2026-02-17 This is a Non-scheduled Passenger flight.

Una ruta nacional saliendo desde el aeropuerto Rio de Janeiro Galeao (GIG) y llegando al aeropuerto Belo Horizonte (CNF).
El vuelo tiene una distancia de 225 millas, o 362 km.
La zona horaria tanto del aeropuerto de salida como del de llegada es UTC-3 . La hora actual en ambos aeropuertos es (loading...).
Para vuelos directos, el tiempo de vuelo oscila entre 1:00 y 1:10.

Comentarios - Descargo de responsabilidad - Privacidad

HORARIO DE VUELOS

Vuelos directos:

Azul AD4205

13:10

Rio de Janeiro Galeao (GIG) 2

14:15

Belo Horizonte (CNF)

Operates only on 2026-01-02

Lun
-

Mar
-

Mie
-

Jue
-

Vie

Sab
-

Dom
-

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4205

13:20

Rio de Janeiro Galeao (GIG) 2

14:25

Belo Horizonte (CNF)

Valid until 2026-01-01

Lun
-

Mar
-

Mie

Jue

Vie
-

Sab
-

Dom
-

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4205

13:20

Rio de Janeiro Galeao (GIG) 2

14:25

Belo Horizonte (CNF)

Effective 2026-02-16 through 2026-02-20

Lun

Mar

Mie

Jue

Vie

Sab
-

Dom
-

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4205

13:25

Rio de Janeiro Galeao (GIG) 2

14:30

Belo Horizonte (CNF)

Effective 2026-02-02 through 2026-02-06

Lun

Mar

Mie

Jue

Vie

Sab
-

Dom
-

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4205

13:25

Rio de Janeiro Galeao (GIG) 2

14:25

Belo Horizonte (CNF)

Effective 2026-02-09 through 2026-02-13

Lun

Mar

Mie

Jue
-

Vie

Sab
-

Dom
-

Duration: 1:00, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4205

13:25

Rio de Janeiro Galeao (GIG) 2

14:30

Belo Horizonte (CNF)

Operates only on 2026-02-12

Lun
-

Mar
-

Mie
-

Jue

Vie
-

Sab
-

Dom
-

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4205

13:35

Rio de Janeiro Galeao (GIG) 2

14:40

Belo Horizonte (CNF)

Effective 2026-01-04 through 2026-01-25

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab
-

Dom

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4205

13:35

Rio de Janeiro Galeao (GIG) 2

14:40

Belo Horizonte (CNF)

Effective 2026-02-08 through 2026-02-22

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab
-

Dom

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4205

13:35

Rio de Janeiro Galeao (GIG) 2

14:40

Belo Horizonte (CNF)

Effective 2026-02-23 through 2026-06-28

Lun

Mar

Mie

Jue

Vie

Sab
-

Dom

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4205

13:35

Rio de Janeiro Galeao (GIG) 2

14:40

Belo Horizonte (CNF)

Effective from 2026-08-03

Lun

Mar

Mie

Jue

Vie

Sab
-

Dom

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4205

13:55

Rio de Janeiro Galeao (GIG) 2

15:00

Belo Horizonte (CNF)

Operates only on 2026-02-01

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab
-

Dom

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4205

14:35

Rio de Janeiro Galeao (GIG) 2

15:40

Belo Horizonte (CNF)

Operates only on 2026-02-21

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab

Dom
-

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4205

14:40

Rio de Janeiro Galeao (GIG) 2

15:45

Belo Horizonte (CNF)

Effective 2026-01-03 through 2026-01-10

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab

Dom
-

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4205

14:40

Rio de Janeiro Galeao (GIG) 2

15:45

Belo Horizonte (CNF)

Operates only on 2026-01-31

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab

Dom
-

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4205

14:40

Rio de Janeiro Galeao (GIG) 2

15:45

Belo Horizonte (CNF)

Operates only on 2026-02-07

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab

Dom
-

Duration: 1:05, non-stop
Embraer E195-E2 (295)

Vuelos directos:

Azul AD4205

14:40

Rio de Janeiro Galeao (GIG) 2

15:45

Belo Horizonte (CNF)

Operates only on 2026-02-14

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab

Dom
-

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4205

14:40

Rio de Janeiro Galeao (GIG) 2

15:45

Belo Horizonte (CNF)

Effective from 2026-02-28

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab

Dom
-

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4205

14:50

Rio de Janeiro Galeao (GIG) 2

15:55

Belo Horizonte (CNF)

Effective 2026-01-17 through 2026-01-24

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab

Dom
-

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4205

17:55

Rio de Janeiro Galeao (GIG) 2

18:55

Belo Horizonte (CNF)

Effective 2026-01-05 through 2026-01-30

Lun

Mar

Mie

Jue

Vie

Sab
-

Dom
-

Duration: 1:00, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4437

17:10

Rio de Janeiro Galeao (GIG) 2

18:15

Belo Horizonte (CNF)

Effective from 2026-02-23

Lun

Mar

Mie

Jue

Vie

Sab
-

Dom

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4437

19:05

Rio de Janeiro Galeao (GIG) 2

20:10

Belo Horizonte (CNF)

Effective from 2026-02-28

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab

Dom
-

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4505

06:10

Rio de Janeiro Galeao (GIG) 2

07:15

Belo Horizonte (CNF)

Valid until 2026-02-22

Lun

Mar

Mie

Jue

Vie

Sab

Dom

Duration: 1:05, non-stop
Embraer E195-E2 (295)

Vuelos directos:

Azul AD4505

06:10

Rio de Janeiro Galeao (GIG) 2

07:15

Belo Horizonte (CNF)

Effective from 2026-02-23

Lun

Mar

Mie

Jue

Vie

Sab

Dom

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4752

20:25

Rio de Janeiro Galeao (GIG) 2

21:30

Belo Horizonte (CNF)

Effective 2026-02-08 through 2026-02-22

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab
-

Dom

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4752

20:45

Rio de Janeiro Galeao (GIG) 2

21:50

Belo Horizonte (CNF)

Valid until 2026-01-01

Lun

Mar
-

Mie
-

Jue

Vie
-

Sab
-

Dom
-

Duration: 1:05, non-stop
Embraer E195-E2 (295)

Vuelos directos:

Azul AD4752

20:50

Rio de Janeiro Galeao (GIG) 2

21:55

Belo Horizonte (CNF)

Effective from 2026-02-23

Lun

Mar

Mie

Jue

Vie

Sab
-

Dom

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4752

20:55

Rio de Janeiro Galeao (GIG) 2

22:00

Belo Horizonte (CNF)

Effective 2026-02-02 through 2026-02-16

Lun

Mar

Mie

Jue

Vie

Sab
-

Dom
-

Duration: 1:05, non-stop
Embraer E195-E2 (295)

Vuelos directos:

Azul AD4752

20:55

Rio de Janeiro Galeao (GIG) 2

22:00

Belo Horizonte (CNF)

Operates only on 2026-02-17
This is a Non-scheduled Passenger flight.

Lun
-

Mar

Mie
-

Jue
-

Vie
-

Sab
-

Dom
-

Duration: 1:05, non-stop
Embraer E195-E2 (295)

Vuelos directos:

Azul AD4752

20:55

Rio de Janeiro Galeao (GIG) 2

22:00

Belo Horizonte (CNF)

Effective 2026-02-18 through 2026-02-20

Lun
-

Mar
-

Mie

Jue

Vie

Sab
-

Dom
-

Duration: 1:05, non-stop
Embraer E195-E2 (295)

Vuelos directos:

Azul AD4752

21:25

Rio de Janeiro Galeao (GIG) 2

22:30

Belo Horizonte (CNF)

Effective 2026-01-05 through 2026-01-30

Lun

Mar
-

Mie

Jue

Vie

Sab
-

Dom
-

Duration: 1:05, non-stop
Embraer E195-E2 (295)

Vuelos directos:

Azul AD4753

21:10

Rio de Janeiro Galeao (GIG) 2

22:15

Belo Horizonte (CNF)

Operates only on 2026-02-01

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab
-

Dom

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4932

09:25

Rio de Janeiro Galeao (GIG) 2

10:30

Belo Horizonte (CNF)

Effective from 2026-02-23

Lun

Mar

Mie

Jue

Vie

Sab
-

Dom
-

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4932

09:30

Rio de Janeiro Galeao (GIG) 2

10:35

Belo Horizonte (CNF)

Effective from 2026-02-28

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab

Dom
-

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD4932

09:40

Rio de Janeiro Galeao (GIG) 2

10:45

Belo Horizonte (CNF)

Effective from 2026-03-01

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab
-

Dom

Duration: 1:05, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD9021

01:15

Rio de Janeiro Galeao (GIG) 2

02:20

Belo Horizonte (CNF)

Valid until 2026-01-03
This is a Non-scheduled Passenger flight.

Lun

Mar

Mie

Jue
-

Vie

Sab

Dom
-

Duration: 1:05, non-stop
Embraer E195-E2 (295)

Vuelos directos:

Azul AD9021

01:15

Rio de Janeiro Galeao (GIG) 2

02:20

Belo Horizonte (CNF)

Effective 2026-01-08 through 2026-02-02
This is a Non-scheduled Passenger flight.

Lun

Mar

Mie

Jue

Vie

Sab

Dom
-

Duration: 1:05, non-stop
Embraer E195-E2 (295)

Vuelos directos:

Azul AD9021

01:15

Rio de Janeiro Galeao (GIG) 2

02:20

Belo Horizonte (CNF)

Operates only on 2026-02-14
This is a Non-scheduled Passenger flight.

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab

Dom
-

Duration: 1:05, non-stop
Embraer E195-E2 (295)

Vuelos directos:

Azul AD9023

10:55

Rio de Janeiro Galeao (GIG) 2

12:00

Belo Horizonte (CNF)

Operates only on 2026-02-04
This is a Non-scheduled Passenger flight.

Lun
-

Mar
-

Mie

Jue
-

Vie
-

Sab
-

Dom
-

Duration: 1:05, non-stop
Embraer E195-E2 (295)

Vuelos directos:

Azul AD9038

14:40

Rio de Janeiro Galeao (GIG) 2

15:50

Belo Horizonte (CNF)

Operates only on 2026-02-22
This is a Non-scheduled Passenger flight.

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab
-

Dom

Duration: 1:10, non-stop
Embraer EMB 195 (E95)

Vuelos directos:

Azul AD9115

21:30

Rio de Janeiro Galeao (GIG) 2

22:35

Belo Horizonte (CNF)

Operates only on 2026-02-17
This is a Non-scheduled Passenger flight.

Lun
-

Mar

Mie
-

Jue
-

Vie
-

Sab
-

Dom
-

Duration: 1:05, non-stop
Embraer E195-E2 (295)

Una ruta nacional saliendo desde el aeropuerto Rio de Janeiro Galeao (GIG) y llegando al aeropuerto Belo Horizonte (CNF).
El vuelo tiene una distancia de 225 millas, o 362 km.
La zona horaria tanto del aeropuerto de salida como del de llegada es UTC-3 . La hora actual en ambos aeropuertos es (loading...).
Para vuelos directos, el tiempo de vuelo oscila entre 1:00 y 1:10.

Todos GIG-CNF vuelos

Todos Azul vuelos

Vuelos de regreso (CNF-GIG)

Comentarios - Descargo de responsabilidad - Privacidad