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Azure network round-trip latency statistics

This article provides round-trip latency statistics between Azure regions to help you optimize your cloud architecture and deployment decisions. The data comes from continuous network monitoring across Azure's global infrastructure and represents real-world performance measurements.

Use these statistics to:

  • Plan multi-region deployments for optimal performance
  • Select regions that minimize latency for your users
  • Design disaster recovery strategies with latency considerations
  • Benchmark expected performance between specific region pairs

What is round-trip latency?

Round-trip latency is the time it takes for a data packet to travel from one point in the network to another and back again. In the context of Azure, it measures the time taken for a packet to travel between two Azure regions. This metric is crucial for applications that require low-latency communication, such as real-time data processing, gaming, and financial transactions.

How is latency measured?

Azure measures round-trip latency using internal network probes that continuously monitor the performance of the Azure backbone network. These probes send data packets between Azure regions and record the time taken for the packets to travel to their destination and back. The measurements are collected in 1-minute intervals, providing a detailed view of network performance over time.

The latency statistics presented in this article are based on the 50th percentile (P50) of these measurements, which represents the median round-trip time. This means that half of the measured round-trip times are below this value, providing a reliable indicator of typical network performance.

Round-trip latency data by region

The monthly Percentile P50 round trip times between Azure regions for a 30-day window are shown in the following tabs. The latency is measured in milliseconds (ms).

The current dataset was taken on June 30, 2025, and it covers the 30-day period ending on June 29, 2025. The following new regions were included in the dataset:

  • New Zealand North
  • Indonesia Central
  • Malaysia West

For readability, each table is split into tabs for groups of Azure regions. The tabs are organized by regions, and then by source region in the first column of each table. For example, the East US tab also shows the latency from all source regions to the two East US regions: East US and East US 2.

Important

Monthly latency numbers across Azure regions don't change regularly. You can expect an update of these tables every 6 to 9 months. Not all global Azure regions are listed in the following tables. When new regions come online, we update this document as soon as latency data is available.

You can perform VM-to-VM latency between regions using test Virtual Machines in your Azure subscription.

Latency tables for Americas regions including US, Canada, and South America.

Use the following tabs to view latency statistics for each region.

Source West Central US West US West US 2 West US 3
Australia Central 166 147 166 151
Australia Central 2 166 147 166 150
Australia East 161 141 162 146
Australia Southeast 173 151 173 159
Brazil South 157 178 178 166
Canada Central 39 64 59 70
Canada East 48 71 68 76
Central India 247 230 221 242
Central US 18 41 39 48
East Asia 173 159 152 163
East US 50 70 66 61
East US 2 48 69 69 56
France Central 131 153 152 137
France South 132 154 150 141
Germany North 139 162 160 149
Germany West Central 136 158 158 142
Indonesia Central
Israel Central 183 205 205 206
Italy North 138 161 159 150
Japan East 121 107 100 112
Japan West 128 115 107 120
Korea Central 144 130 123 136
Korea South 137 124 117 129
Malaysia West 189 175 167 191
Mexico Central 43 52 69 40
New Zealand North 147 133 137 135
North Central US 27 51 47 58
North Europe 116 140 137 130
Norway East 141 163 161 152
Norway West 138 160 159 149
Poland Central 148 170 168 158
Qatar Central 269 263 259 267
South Africa North 256 277 278 265
South Africa West 241 263 262 249
South Central US 25 36 47 24
South India 217 204 196 219
Southeast Asia 184 171 163 187
Sweden Central 160 182 183 175
Switzerland North 141 164 162 150
Switzerland West 136 159 156 147
UAE Central 230 252 245 241
UAE North 231 253 249 241
UK South 125 147 145 137
UK West 127 150 149 136
West Central US 26 25 36
West Europe 131 154 151 143
West India 197 184 176 199
West US 26 25 20
West US 2 25 25 41
West US 3 36 20 42

Additionally, you can view all of the data in a single table.

Screenshot of full region latency table.

Next steps

Learn about Azure regions.