President Biden said the United States "will support a joint effort with our allies and partners to train Ukrainian pilots on fourth-generation fighter aircraft, including F-16s, to further strengthen and improve the capabilities of the Ukrainian Air Force," the official said.
"As the training takes place over the coming months, our coalition of countries participating in this effort will decide when to actually provide jets, how many we will provide, and who will provide them."
The U.S. move signals a major breakthrough for Kyiv, which has repeatedly - and until recently unsuccessfully - pushed its Western supporters to agree to provide high-tech jets as it fights to fend off Russia's more than year-long invasion.
Ukrainian President Volodymyr Zelenskyy, who is set to attend the G7 summit on Sunday in Japan, hailed the move on Twitter as a "historic decision," adding that he looked forward to "discussing the practical implementation" of the plan at the summit.
Momentum has been building for providing high-tech warplanes to Ukraine, but U.S. support is especially key, as it legally has to approve the reexport of equipment purchased by allies, including F-16 jets.
Earlier this week, U.K. Prime Minister Rishi Sunak and Dutch Prime Minister Mark Rutte pledged to build an "international coalition" to provide fighter jet support for Ukraine.
After visiting Sunak at his Chequers country estate outside London on Monday, Ukrainian President Volodymyr Zelenskyy said he was "very positive" about creating a "jets coalition" in his country's war with Russia.
Sunak welcomed Washington's announcement of warplane support for Ukraine.
"Welcome announcement that the U.S. will approve the training of Ukrainian pilots on F-16 fighter jets. The U.K. will work together with the USA and the Netherlands, Belgium and Denmark to get Ukraine the combat air capability it needs," Sunak tweeted.
Sunak said Monday that the U.K. was preparing to open a flight school to train Ukrainian pilots, and French President Emmanuel Macron also offered to do so but ruled out sending war planes to Kyiv.
Previously, U.S. opposition to providing advanced jets centered around the long timeline and high price of doing so, with officials saying there were more cost-effective means to boost Kyiv's air defenses.
Mark Cancian, a senior adviser at the Center for Strategic and International Studies, said ahead of the White House official's comment that F-16s are "very expensive and aren't going to radically change the balance of power."
But he also noted that they have "psychological significance" at this point due to Zelenskyy's repeated requests for the aircraft.
The United States has spearheaded the push for international support for Ukraine, quickly forging an international coalition to back Kyiv after Russia invaded in February 2022 and coordinating aid from dozens of countries.
Total international military assistance for Kyiv is in the tens of billions of dollars, with the United States the lead donor.
In addition to hundreds of tanks and other armored vehicles, assistance for Kyiv has included a number of air defense systems, precision rocket launchers, artillery pieces, and a wide variety of ammunition, among other items.
The United States has also trained 11 Ukrainian battalions - some 6,100 troops - in combined arms operations and 4,000 on individual systems.
More than two dozen other countries are also involved in the training effort, which has instructed a total of more than 52,000 Ukrainian soldiers so far.
