DALLAS>>United and Continental are raising airfares on many U.S. routes by up to $20 per round trip ticket.

It’s the latest effort to cover spiraling fuel costs across the airline industry.The two airlines raised prices Thursday night.

Spokesman Mike Trevino says fares went up $3 each way on flights longer than 500 miles, and $10 each way for first-class tickets.

U.S. airlines have raised prices more than a half dozen times this year.

Most still lost money in the first quarter due to higher fuel costs. United Continental Holdings Inc. lost $213 million. Its fuel bill rose $560 million, or 26 percent from a year ago.