Qatar Airways vuelo QR 6588: Orly, Paris - Madrid

HORARIO DE VUELOS
Vuelos directos de código compartido:
Lun,Mar,Dom 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (32A) 2:05 Effective 2024-10-27 through 2024-10-29 Codeshare flight, operated by Iberia.(IB 584)
Lun,Mie-Dom 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A321 (321) 2:05 Effective 2024-10-30 through 2024-11-28 Codeshare flight, operated by Iberia.(IB 584)
Mar 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (32A) 2:05 Effective 2024-11-05 through 2024-11-26 Codeshare flight, operated by Iberia.(IB 584)
Lun-Mie,Vie 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (32A) 2:05 Effective 2024-11-29 through 2024-12-06 Codeshare flight, operated by Iberia.(IB 584)
Sab 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (320) 2:05 Effective 2024-11-30 through 2025-03-01 Codeshare flight, operated by Iberia.(IB 584)
Jue,Dom 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A321 (321) 2:05 Effective 2024-12-01 through 2024-12-05 Codeshare flight, operated by Iberia.(IB 584)
Lun-Vie,Dom 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (32A) 2:05 Effective 2024-12-08 through 2024-12-24 Codeshare flight, operated by Iberia.(IB 584)
Mar,Mie,Dom 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A321 (321) 2:05 Effective 2024-12-25 through 2025-01-01 Codeshare flight, operated by Iberia.(IB 584)
Lun,Jue,Vie 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (32A) 2:05 Effective 2024-12-26 through 2024-12-30 Codeshare flight, operated by Iberia.(IB 584)
Lun-Vie,Dom 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A321 (321) 2:05 Effective 2025-01-02 through 2025-01-13 Codeshare flight, operated by Iberia.(IB 584)
Lun,Mar 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (32A) 2:05 Effective 2025-01-14 through 2025-01-21 Codeshare flight, operated by Iberia.(IB 584)
Mie-Vie,Dom 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A321 (321) 2:05 Effective 2025-01-15 through 2025-01-19 Codeshare flight, operated by Iberia.(IB 584)
Lun-Mie,Vie 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (32A) 2:05 Effective 2025-01-22 through 2025-01-31 Codeshare flight, operated by Iberia.(IB 584)
Jue,Dom 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A321 (321) 2:05 Effective 2025-01-23 through 2025-01-30 Codeshare flight, operated by Iberia.(IB 584)
Lun-Mie,Vie,Dom 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (32A) 2:05 Effective 2025-02-02 through 2025-02-07 Codeshare flight, operated by Iberia.(IB 584)
Mar-Jue,Dom 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A321 (321) 2:05 Effective 2025-02-06 through 2025-02-13 Codeshare flight, operated by Iberia.(IB 584)
Lun 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (32A) 2:05 Operates only on 2025-02-10 Codeshare flight, operated by Iberia.(IB 584)
Lun,Jue,Vie,Dom 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A321 (321) 2:05 Effective 2025-02-14 through 2025-03-03 Codeshare flight, operated by Iberia.(IB 584)
Mar,Mie 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (32A) 2:05 Effective 2025-02-18 through 2025-03-04 Codeshare flight, operated by Iberia.(IB 584)
Lun,Mie-Dom 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A321 (321) 2:05 Effective 2025-03-05 through 2025-03-29 Codeshare flight, operated by Iberia.(IB 584)
Mar 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (32A) 2:05 Effective 2025-03-11 through 2025-03-25 Codeshare flight, operated by Iberia.(IB 584)
Diario 07:25 Orly, Paris (ORY) 1 09:30 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (320) 2:05 Effective from 2025-03-30 Codeshare flight, operated by Iberia.(IB 584)
Lun-Mie,Vie-Dom 07:30 Orly, Paris (ORY) 1 09:35 Madrid (MAD) 4 QR 6588 Non-stop Airbus A321 (321) 2:05 Valid until 2024-09-06 Codeshare flight, operated by Iberia.(IB 3417)
Jue 07:30 Orly, Paris (ORY) 1 09:35 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (320) 2:05 Valid until 2024-09-05 Codeshare flight, operated by Iberia.(IB 3417)
Sab 07:30 Orly, Paris (ORY) 1 09:35 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (320) 2:05 Operates only on 2024-09-07 Codeshare flight, operated by Iberia.(IB 3417)
Lun-Mie,Vie-Dom 07:30 Orly, Paris (ORY) 1 09:35 Madrid (MAD) 4 QR 6588 Non-stop Airbus A321 (321) 2:05 Effective 2024-09-08 through 2024-09-14 Codeshare flight, operated by Iberia.(IB 3417)
Mar,Jue,Dom 07:30 Orly, Paris (ORY) 1 09:35 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (32A) 2:05 Effective 2024-09-12 through 2024-09-19 Codeshare flight, operated by Iberia.(IB 3417)
Lun,Mie,Vie,Sab 07:30 Orly, Paris (ORY) 1 09:35 Madrid (MAD) 4 QR 6588 Non-stop Airbus A321 (321) 2:05 Effective 2024-09-16 through 2024-09-30 Codeshare flight, operated by Iberia.(IB 3417)
Dom 07:30 Orly, Paris (ORY) 1 09:35 Madrid (MAD) 4S QR 6588 Non-stop Airbus A320 (320) 2:05 Operates only on 2024-09-22 Codeshare flight, operated by Iberia.(IB 3417)
Mar 07:30 Orly, Paris (ORY) 1 09:35 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (32A) 2:05 Operates only on 2024-09-24 Codeshare flight, operated by Iberia.(IB 3417)
Mar,Jue,Dom 07:30 Orly, Paris (ORY) 1 09:35 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (320) 2:05 Effective 2024-09-26 through 2024-10-03 Codeshare flight, operated by Iberia.(IB 3417)
Mie 07:30 Orly, Paris (ORY) 1 09:35 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (32A) 2:05 Operates only on 2024-10-02 Codeshare flight, operated by Iberia.(IB 3417)
Lun,Mie,Vie-Dom 07:30 Orly, Paris (ORY) 1 09:35 Madrid (MAD) 4 QR 6588 Non-stop Airbus A321 (321) 2:05 Effective 2024-10-04 through 2024-10-19 Codeshare flight, operated by Iberia.(IB 3417)
Mar,Jue 07:30 Orly, Paris (ORY) 1 09:35 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (320) 2:05 Effective 2024-10-08 through 2024-10-17 Codeshare flight, operated by Iberia.(IB 3417)
Dom 07:30 Orly, Paris (ORY) 1 09:35 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (32A) 2:05 Operates only on 2024-10-20 Codeshare flight, operated by Iberia.(IB 3417)
Lun-Mie,Vie,Sab 07:30 Orly, Paris (ORY) 1 09:35 Madrid (MAD) 4 QR 6588 Non-stop Airbus A321 (321) 2:05 Effective 2024-10-21 through 2024-10-26 Codeshare flight, operated by Iberia.(IB 3417)
Jue 07:30 Orly, Paris (ORY) 1 09:35 Madrid (MAD) 4 QR 6588 Non-stop Airbus A320 (320) 2:05 Operates only on 2024-10-24 Codeshare flight, operated by Iberia.(IB 3417)

QR 6588 es un vuelo internacional saliendo desde el aeropuerto Orly, Paris (ORY) y llegando al aeropuerto Madrid (MAD).
El vuelo tiene una distancia de 640 millas, o 1029 km.
La zona horaria tanto del aeropuerto de salida como del de llegada es UTC+1 . La hora actual en ambos aeropuertos es (loading...).
Para vuelos directos, el tiempo de vuelo es 2:05.

Comentarios - Descargo de responsabilidad - Privacidad

Qatar Airways vuelo QR 6588:
Orly, Paris - Madrid

HORARIO DE VUELOS

Vuelos directos de código compartido:

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2024-10-27 through 2024-10-29

Lun

Mar

Mie
-

Jue
-

Vie
-

Sab
-

Dom

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A320 (32A)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2024-10-30 through 2024-11-28

Lun

Mar
-

Mie

Jue

Vie

Sab

Dom

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A321 (321)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2024-11-05 through 2024-11-26

Lun
-

Mar

Mie
-

Jue
-

Vie
-

Sab
-

Dom
-

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A320 (32A)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2024-11-29 through 2024-12-06

Lun

Mar

Mie

Jue
-

Vie

Sab
-

Dom
-

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A320 (32A)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2024-11-30 through 2025-03-01

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab

Dom
-

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A320 (320)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2024-12-01 through 2024-12-05

Lun
-

Mar
-

Mie
-

Jue

Vie
-

Sab
-

Dom

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A321 (321)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2024-12-08 through 2024-12-24

Lun

Mar

Mie

Jue

Vie

Sab
-

Dom

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A320 (32A)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2024-12-25 through 2025-01-01

Lun
-

Mar

Mie

Jue
-

Vie
-

Sab
-

Dom

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A321 (321)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2024-12-26 through 2024-12-30

Lun

Mar
-

Mie
-

Jue

Vie

Sab
-

Dom
-

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A320 (32A)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2025-01-02 through 2025-01-13

Lun

Mar

Mie

Jue

Vie

Sab
-

Dom

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A321 (321)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2025-01-14 through 2025-01-21

Lun

Mar

Mie
-

Jue
-

Vie
-

Sab
-

Dom
-

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A320 (32A)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2025-01-15 through 2025-01-19

Lun
-

Mar
-

Mie

Jue

Vie

Sab
-

Dom

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A321 (321)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2025-01-22 through 2025-01-31

Lun

Mar

Mie

Jue
-

Vie

Sab
-

Dom
-

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A320 (32A)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2025-01-23 through 2025-01-30

Lun
-

Mar
-

Mie
-

Jue

Vie
-

Sab
-

Dom

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A321 (321)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2025-02-02 through 2025-02-07

Lun

Mar

Mie

Jue
-

Vie

Sab
-

Dom

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A320 (32A)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2025-02-06 through 2025-02-13

Lun
-

Mar

Mie

Jue

Vie
-

Sab
-

Dom

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A321 (321)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Operates only on 2025-02-10

Lun

Mar
-

Mie
-

Jue
-

Vie
-

Sab
-

Dom
-

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A320 (32A)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2025-02-14 through 2025-03-03

Lun

Mar
-

Mie
-

Jue

Vie

Sab
-

Dom

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A321 (321)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2025-02-18 through 2025-03-04

Lun
-

Mar

Mie

Jue
-

Vie
-

Sab
-

Dom
-

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A320 (32A)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2025-03-05 through 2025-03-29

Lun

Mar
-

Mie

Jue

Vie

Sab

Dom

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A321 (321)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective 2025-03-11 through 2025-03-25

Lun
-

Mar

Mie
-

Jue
-

Vie
-

Sab
-

Dom
-

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A320 (32A)

Qatar Airways QR6588

07:25

Orly, Paris (ORY) 1

09:30

Madrid (MAD) 4

Effective from 2025-03-30

Lun

Mar

Mie

Jue

Vie

Sab

Dom

Codeshare flight, operated by Iberia. (IB 584)

Duration: 2:05, non-stop
Airbus A320 (320)

Qatar Airways QR6588

07:30

Orly, Paris (ORY) 1

09:35

Madrid (MAD) 4

Valid until 2024-09-06

Lun

Mar

Mie

Jue
-

Vie

Sab

Dom

Codeshare flight, operated by Iberia. (IB 3417)

Duration: 2:05, non-stop
Airbus A321 (321)

Qatar Airways QR6588

07:30

Orly, Paris (ORY) 1

09:35

Madrid (MAD) 4

Valid until 2024-09-05

Lun
-

Mar
-

Mie
-

Jue

Vie
-

Sab
-

Dom
-

Codeshare flight, operated by Iberia. (IB 3417)

Duration: 2:05, non-stop
Airbus A320 (320)

Qatar Airways QR6588

07:30

Orly, Paris (ORY) 1

09:35

Madrid (MAD) 4

Operates only on 2024-09-07

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab

Dom
-

Codeshare flight, operated by Iberia. (IB 3417)

Duration: 2:05, non-stop
Airbus A320 (320)

Qatar Airways QR6588

07:30

Orly, Paris (ORY) 1

09:35

Madrid (MAD) 4

Effective 2024-09-08 through 2024-09-14

Lun

Mar

Mie

Jue
-

Vie

Sab

Dom

Codeshare flight, operated by Iberia. (IB 3417)

Duration: 2:05, non-stop
Airbus A321 (321)

Qatar Airways QR6588

07:30

Orly, Paris (ORY) 1

09:35

Madrid (MAD) 4

Effective 2024-09-12 through 2024-09-19

Lun
-

Mar

Mie
-

Jue

Vie
-

Sab
-

Dom

Codeshare flight, operated by Iberia. (IB 3417)

Duration: 2:05, non-stop
Airbus A320 (32A)

Qatar Airways QR6588

07:30

Orly, Paris (ORY) 1

09:35

Madrid (MAD) 4

Effective 2024-09-16 through 2024-09-30

Lun

Mar
-

Mie

Jue
-

Vie

Sab

Dom
-

Codeshare flight, operated by Iberia. (IB 3417)

Duration: 2:05, non-stop
Airbus A321 (321)

Qatar Airways QR6588

07:30

Orly, Paris (ORY) 1

09:35

Madrid (MAD) 4S

Operates only on 2024-09-22

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab
-

Dom

Codeshare flight, operated by Iberia. (IB 3417)

Duration: 2:05, non-stop
Airbus A320 (320)

Qatar Airways QR6588

07:30

Orly, Paris (ORY) 1

09:35

Madrid (MAD) 4

Operates only on 2024-09-24

Lun
-

Mar

Mie
-

Jue
-

Vie
-

Sab
-

Dom
-

Codeshare flight, operated by Iberia. (IB 3417)

Duration: 2:05, non-stop
Airbus A320 (32A)

Qatar Airways QR6588

07:30

Orly, Paris (ORY) 1

09:35

Madrid (MAD) 4

Effective 2024-09-26 through 2024-10-03

Lun
-

Mar

Mie
-

Jue

Vie
-

Sab
-

Dom

Codeshare flight, operated by Iberia. (IB 3417)

Duration: 2:05, non-stop
Airbus A320 (320)

Qatar Airways QR6588

07:30

Orly, Paris (ORY) 1

09:35

Madrid (MAD) 4

Operates only on 2024-10-02

Lun
-

Mar
-

Mie

Jue
-

Vie
-

Sab
-

Dom
-

Codeshare flight, operated by Iberia. (IB 3417)

Duration: 2:05, non-stop
Airbus A320 (32A)

Qatar Airways QR6588

07:30

Orly, Paris (ORY) 1

09:35

Madrid (MAD) 4

Effective 2024-10-04 through 2024-10-19

Lun

Mar
-

Mie

Jue
-

Vie

Sab

Dom

Codeshare flight, operated by Iberia. (IB 3417)

Duration: 2:05, non-stop
Airbus A321 (321)

Qatar Airways QR6588

07:30

Orly, Paris (ORY) 1

09:35

Madrid (MAD) 4

Effective 2024-10-08 through 2024-10-17

Lun
-

Mar

Mie
-

Jue

Vie
-

Sab
-

Dom
-

Codeshare flight, operated by Iberia. (IB 3417)

Duration: 2:05, non-stop
Airbus A320 (320)

Qatar Airways QR6588

07:30

Orly, Paris (ORY) 1

09:35

Madrid (MAD) 4

Operates only on 2024-10-20

Lun
-

Mar
-

Mie
-

Jue
-

Vie
-

Sab
-

Dom

Codeshare flight, operated by Iberia. (IB 3417)

Duration: 2:05, non-stop
Airbus A320 (32A)

Qatar Airways QR6588

07:30

Orly, Paris (ORY) 1

09:35

Madrid (MAD) 4

Effective 2024-10-21 through 2024-10-26

Lun

Mar

Mie

Jue
-

Vie

Sab

Dom
-

Codeshare flight, operated by Iberia. (IB 3417)

Duration: 2:05, non-stop
Airbus A321 (321)

Qatar Airways QR6588

07:30

Orly, Paris (ORY) 1

09:35

Madrid (MAD) 4

Operates only on 2024-10-24

Lun
-

Mar
-

Mie
-

Jue

Vie
-

Sab
-

Dom
-

Codeshare flight, operated by Iberia. (IB 3417)

Duration: 2:05, non-stop
Airbus A320 (320)

QR 6588 es un vuelo internacional saliendo desde el aeropuerto Orly, Paris (ORY) y llegando al aeropuerto Madrid (MAD).
El vuelo tiene una distancia de 640 millas, o 1029 km.
La zona horaria tanto del aeropuerto de salida como del de llegada es UTC+1 . La hora actual en ambos aeropuertos es (loading...).
Para vuelos directos, el tiempo de vuelo es 2:05.

Todos los vuelos de Qatar Airways

Todos ORY-MAD vuelos

Vuelos de regreso (MAD-ORY)

Comentarios - Descargo de responsabilidad - Privacidad