Austin's trip is expected to include discussions about US efforts to help Ukraine boost its defences as Moscow's forces advance in the east, the Reuters news agency reported.
Two weeks ahead of a US presidential election, Austin signalled continuity in Washington's support, according to Reuters.
"We're going to continue to support Ukraine in its efforts to defend its sovereign territory," Austin told reporters, as cited by Reuters.
He added: "We've watched this fight evolve over time. And each time that it does evolve, we have risen to the occasion to meet (Ukraine's) needs to make sure that they were effective on the battlefield."
Austin also said that he saw support for Ukraine from both Republicans and Democrats in Congress, Reuters reported.
"I've seen bipartisan support for Ukraine over the last two-and-a-half years, and I fully expect that we'll continue to see the bipartisan support from Congress," he said, according to Reuters.
Russia invaded Ukraine on February 24, 2022, starting the largest armed conflict in Europe since World War II.
Monday is day 971 of Russia’s war on Ukraine.
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Source: IAR, PAP, Reuters