United Airlines (UAL) - Get United Airlines Holdings, Inc. Report  said it will reduce service to the United Kingdom from both Washington Dulles International Airport and Newark in its winter schedule, providing one more indication of the impact Brexit is having on U.S. to U.K. air service.

Jim Compton, United's chief revenue officer, said the carrier will suspend Dulles-Manchester service and operate smaller aircraft on at least one of three daily Dulles-Heathrow routes, currently served with a combination of Boeing 777s and a Boeing 757.

"We are also looking at some days a week downgrades in Newark-Birmingham," Compton said. However, there are no reductions planned in the key business route from Newark to London Heathrow. Compton spoke on a media call following United's second-quarter earnings release.

"Summer peak is strong; levels look good," Compton said. "We're going through a review of the network today (and) we've made some adjustments to the winter schedule.

"What we're focused on is dollar strength relative to the pound," he said, noting that the U.K. is more affordable for U.S. passengers but the U.S. is less affordable for U.K. passengers. Last week, Delta (DAL) - Get Delta Air Lines, Inc. Report President Glen Hauenstein cited the same impact and said Delta will cut capacity between the U.S. and the U.K. by 6 percentage points in its winter schedule because of the United Kingdom's vote to leave the European Union.

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Also like Delta executives, Compton said leisure demand has been stronger than business demand. "We see demand relatively stable, {stronger} on the leisure side than the corporate side," he said, noting that it is too soon to talk about September business bookings, which generally occur closer to the travel date.

Gerry Laderman, United's acting chief financial officer, said the airline is reducing full-year capacity growth by a quarter point, so that full-year growth will be just 1% to 1.5%, a change from the previous guidance of 1% to 2%.

Excluding items, United reported second-quarter net income of $863 million and per-share earnings of $2.61. Analysts had estimated $2.56. The carrier said passenger revenue per available seat mile declined 6.6% in the second quarter, at the better end of guidance, and projected that current quarter PRASM would decline between 5.5% and 7.5%.

United shares closed Tuesday at $47.45, down 16% year to date. 

Following the earnings release, Deutsche Bank analyst Mike Linenberg wrote a report headlined "Better-than-expected June Q." He maintained a buy recommendation and a $59 target price. S&P Capital Global Market Intelligence analyst Jim Corridore maintained a strong buy on United but cut his price target to $70 from $80.

This article is commentary by an independent contributor. At the time of publication, the author held no positions in the stocks mentioned.