United had higher salary costs compared with the year-ago period.
The carrier also accounted for US$561m in one-time costs, in connection with a tentative labour agreement with its flight attendants union.
United pointed to a turnaround in its performance at Newark, New Jersey after problems with the airport’s air traffic operation led to delays and flight cancellations throughout much of May.
The airline was forced to cancel many flights per day after an April 28 equipment outage meant Newark’s air traffic controllers lost radar and communications with planes for 90 seconds.
Following that incident, US air officials slowed traffic during this period because of insufficient staffing.
But United has pointed to improved performance at Newark after US officials moved to replace some outdated equipment.
United’s operation at Newark “led all other major airlines in on-time performance and lowest seat cancellation rate at all New York City area airports”, United said in its press release.
United plans to resume service between its Newark hub and Tel Aviv, Israel on July 21, after suspending service because of the Israel-Iran war.
“United saw a positive shift in demand beginning in early July, and, like 2024, anticipates another inflection in industry supply in mid-August,” United CEO Scott Kirby said.
“The world is less uncertain today than it was during the first six months of 2025 and that gives us confidence about a strong finish to the year.”
United projected full-year 2025 profits of between US$9 and US$11 per share.
Those figures are about US$2 above the range of its “recessionary environment” forecast from April, but about US$2.50 per share below the “stable environment” projection.
Shares in United fell 1.5% in after-hours trading.
Back in April, the airline offered two different profit outlooks, saying the economy was then “impossible to predict” with any degree of confidence.
Last week, United’s rival Delta Air Lines predicted a stronger third quarter than analysts had anticipated.
Delta is the world’s biggest airline by revenue and market capitalisation (US$36.38b).
Delta reported year-on-year revenue growth of 3.3% in the March quarter.
– Agence France-Presse. Additional reporting: John Weekes