ANNOUNCEMENT ON KEY OPERATING DATA

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this announcement.(a joint stock limited company incorporated in the People’s Republic of China with limited liability) (Stock Code: 1055) ANNOUNCEMENT ON KEY OPERATING DATA This announcement is made based on the operating data for June 2024 of the Group to be published on the Shanghai Stock Exchange and pursuant to Rules 13.09 and 13.10B of the Listing Rules and the Inside Information Provisions (as defined in the Listing Rules) under Part XIVA of the Securities and Futures Ordinance (Chapter 571 of the Laws of Hong Kong).The relevant key operating data was calculated based on the internal statistics of the Group which may differ from the data disclosed in the relevant periodic reports. Investors are hereby reminded of the risks which may result from inappropriate reliance upon or utilization of the relevant information.This announcement is made based on the operating data for June 2024 of China Southern Airlines Company Limited (the “Company”) and its subsidiaries (collectively the “Group”) to be published on the Shanghai Stock Exchange and pursuant to Rules 13.09 and 13.10B of the RulesGoverning the Listing of Securities on The Stock Exchange of Hong Kong Limited (the “ListingRules”) and the Inside Information Provisions (as defined in the Listing Rules) under Part XIVA of the Securities and Futures Ordinance (Chapter 571 of the Laws of Hong Kong).In June 2024 passenger capacity (measured by available seat kilometres (“ASK”)) of the Group increased by 12.47% as compared with the same period last year (a year-on-year (“YoY”) basis) of which the passenger capacity for domestic routes regional routes and international routes increased by 0.84% 40.05% and 75.14% respectively as compared with the same period last year. Compared with the same period last year passenger traffic (measured by revenue passenger kilometres (“RPK”)) increased by 17.97% of which passenger traffic for domestic routes regional routes and international routes increased by 6.86% 42.39% and 75.81% respectively as compared with the same period last year. The passenger load factor was 83.36% representing an increase of 3.89 percentage points as compared with the same period last year of which the passenger load factor for domestic routes regional routes and international routes increased by 4.72 1.29 and 0.32 percentage points respectively as compared with the same period last year. 1In terms of cargo operations in June 2024 cargo capacity (measured by available tonne kilometers (“ATK”) - Cargo and Mail) increased by 10.95% as compared with the same period last year. Cargo and mail traffic (measured by revenue tonne kilometres (“RTK”) - Cargo and Mail) increased by 18.02% as compared with the same period last year. The cargo and mail load factor was 55.41% representing an increase of 3.32 percentage points as compared with the same period last year.In June 2024 the Group has newly launched the following major routes: Luzhou – Wuhan – Tianjin – Wuhan – Luzhou (being seven flights a week) Chongqing – Phnom Penh – Chongqing (being four flights a week) Fuzhou – Lianyungang – Ordos – Lianyungang – Fuzhou Chongqing – Colombo – Male – Colombo – Chongqing (each being three flights a week).In June 2024 the Group disposed of three aircrafts (including one A330-200 aircraft one B737-800 aircraft and one A320 aircraft). As of the end of June 2024 the Group operated a fleet of 907 commercial aircrafts as set out below: Aircraft Model Self-owned Finance Lease Operating Lease Subtotal Airbus 350 Series 6 14 0 20 Airbus 330 Series 9 18 5 32 Airbus 320 Series 154 67 144 365 Boeing 787 Series 8 22 10 40 Boeing 777 Series 11 21 0 32 Boeing 737 Series 143 60 179 382 EMB190 Series 4 0 0 4 ARJ21 7 25 0 32 Total 342 227 338 907 KEY OPERATING DATA OF JUNE 2024 June 2024 Cumulative 2024 Month-on- Traffic Month YoY YoY Change Amount (“MoM”) Change Amount (%) Change (%) (%) RPK (in million) Domestic 18387.14 -1.09 6.86 111841.40 15.69 Regional 230.27 2.81 42.39 1224.88 63.83 International 5696.21 3.12 75.81 32570.62 178.14 Total 24313.61 -0.10 17.97 145636.90 33.46 2RTK (in million) Domestic 1755.96 -1.23 6.60 10569.91 15.57 Regional 22.86 2.28 38.75 121.99 63.78 International 1155.65 2.29 40.16 6624.24 63.20 Total 2934.47 0.16 17.94 17316.14 30.40 RTK - Cargo and Mail (in million) Domestic 134.17 0.10 4.34 780.59 22.50 Regional 2.56 -1.05 8.07 14.99 64.59 International 654.29 2.20 21.32 3763.23 24.42 Total 791.02 1.82 18.02 4558.81 24.18 Passengers carried (in thousand) Domestic 11547.76 -2.76 5.24 70442.01 14.37 Regional 166.16 -2.34 21.29 971.57 50.08 International 1404.01 1.86 72.82 8023.16 189.43 Total 13117.93 -2.28 10.03 79436.75 22.19 Cargo and mail carried (in thousand tonnes) Domestic 77.69 -0.13 -0.16 452.98 19.36 Regional 2.35 -0.74 12.53 13.59 65.14 International 73.58 0.56 28.00 420.67 31.98 Total 153.61 0.19 11.81 887.24 25.59 June 2024 Cumulative 2024 Capacity MoM YoY YoY Change Amount Change Change Amount (%) (%)(%) ASK (in million) Domestic 21956.52 -0.76 0.84 133845.85 4.79 Regional 293.42 -0.88 40.05 1589.97 55.19 International 6915.82 0.53 75.14 39885.45 161.12 Total 29165.76 -0.46 12.47 175321.27 21.72 ATK (in million) Domestic 2435.16 -1.31 0.30 15037.53 3.33 Regional 34.02 -1.95 22.69 188.75 41.49 International 1583.35 0.34 35.90 9446.27 63.48 Total 4052.54 -0.67 11.93 24672.55 20.56 ATK - Cargo and Mail (in million) Domestic 459.08 -3.60 -1.94 2991.40 -2.14 Regional 7.61 -5.48 -14.22 45.66 10.84 International 960.93 0.23 18.67 5856.58 32.99 Total 1427.62 -1.07 10.95 8893.64 18.56 3June 2024 Cumulative 2024 MoM YoY Load Factor YoY Change Figure Change Change Figure (Percentage (%) (Percentage (Percentage (%) Points) Points) Points) Passenger Load Factor (RPK/ASK) Domestic 83.74 -0.28 4.72 83.56 7.88 Regional 78.48 2.82 1.29 77.04 4.06 International 82.36 2.06 0.32 81.66 5.00 Total 83.36 0.30 3.89 83.07 7.30 Cargo and Mail Load Factor Domestic 29.23 1.08 1.76 26.09 5.25 Regional 33.66 1.51 6.94 32.83 10.72 International 68.09 1.31 1.49 64.26 -4.43 Total 55.41 1.58 3.32 51.26 2.32 Overall Load Factor (RTK/ATK) Domestic 72.11 0.06 4.26 70.29 7.44 Regional 67.21 2.79 7.78 64.63 8.79 International 72.99 1.39 2.22 70.13 -0.12 Total 72.41 0.60 3.69 70.18 5.29 Notes: 1. “RPK(s)” refers to the number of passengers carried multiplied by the kilometers flown; 2. “RTK(s)” refers to the load (passenger and cargo and mail) in tonnes multiplied by the kilometers flown; 3. “RTK(s) - Cargo and Mail” refers to the cargo and mail load in tonnes multiplied by the kilometers flown; 4. “ASK(s)” refers to the number of seats available for sale multiplied by the kilometers flown; 5. “ATK(s)” refers to the number of tonnes of capacity available for transportation multiplied by the kilometers flown; 6. “ATK(s) - Cargo and Mail” refers to the number of tonnes of capacity available for the carriage of cargo and mail multiplied by the kilometers flown; 7. “Passenger Load Factor” refers to RPK expressed as a percentage of ASK; 8. “Cargo and Mail Load Factor” refers to RTK- Cargo and Mail expressed as a percentage of ATK - Cargo and Mail; 9. “Overall Load Factor” refers to RTK expressed as a percentage of ATK. The key operating data above was calculated based on the internal preliminary statistics of the Group which may be subsequently adjusted or differ from the data disclosed in the relevant 4periodic reports. Investors are hereby reminded of the risks which may result from inappropriate reliance upon or utilization of the information given above.By order of the Board China Southern Airlines Company Limited Chen Wei Hua and Liu Wei Joint Company Secretaries Guangzhou the People’s Republic of China 15 July 2024 As at the date of this announcement the Directors include Ma Xu Lun Han Wen Sheng and Luo Lai Jun as executive Directors; and Pansy Catilina Chiu King Ho Gu Hui Zhong Guo Wei and Cai Hong Ping as independent non-executive Directors. 5