Spirit Airlines is launching daily service on four new routes starting April 25, with three of the routes expected to be year-round and the fourth operating until November 6.

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Frontier Airlines is launching six-times-weekly non-stop service between its hub at Denver International Airport and Cincinnati/Northern Kentucky International Airport on May 16.

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United is planning new flights to Latin America from Chicago and Washington, D.C. The carrier is also planning to launch new services to Canada from Denver, New York, and Washington, D.C., as well as additional domestic routes from Chicago, Denver, Los Angeles and Washington, D.C.

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Operated by Boeing 737-400 equipment, Xtra Airways’ flight program to Mazatlán will offer nine weekly round-trips of 150-passenger capacity (for a total of 1,350 seats per week in each direction) from Houston, San Antonio, Denver, Los Angeles and Oakland.

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Frontier Airlines is launching three-times-weekly service between Colorado Springs Airport and San Diego International Airport on September 18. On September 17, Frontier announced it would begin four-times-weekly service between Denver International Airport and Cleveland Hopkins International.

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Two of the new routes are from Houston George Bush Intercontinental Airport – to Chicago O’Hare International Airport and to Las Vegas. The third is between Denver International Airport and Phoenix-Mesa Gateway Airport. Spirit is also launching service between Portland, Oregon and San Diego.

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United Airlines has announced the first six international routes it will operate with its Boeing 787-8 Dreamliners, the first of which it is due to receive at the end of September.

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United Airlines plans to launch year-round and seasonal service on several new international and domestic routes, including new, daily transpacific and transatlantic flights from San Francisco, its largest Pacific gateway.

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The airline has re-booked customers who purchased tickets to fly to or from Houston Hobby Airport on July 11 and beyond on flights to or from Houston Bush Intercontinental Airport.

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Southwest Airlines and its subsidiary AirTran Airways have announced new routes as they extend their flight schedules for travel bookings through January 4, 2013.

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United Airlines is planning to launch daily non-stop United Express service linking its Denver hub with Shreveport in Louisiana and Grand Forks in North Dakota. In addition, United Airlines will expand its existing summer service between Denver and Anchorage to year-round flights.

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Southwest Airlines’ schedule at Akron-Canton will offer two daily round-trips to Chicago Midway Airport and one daily round-trip to Denver. The airline will begin service to Dayton with one daily flight to Denver. Southwest’s service at Akron-Canton and Dayton will complement AirTran’s existing service.

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Southwest Airlines will open its ninth pilot crew base in October at Denver International Airport, and the corresponding flight-attendant crew base at Denver during the fourth quarter.

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Frontier Airlines is launching non-stop, five-times-weekly service to Bismarck in North Dakota on May 17 from its Denver International Airport hub.

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Southwest Airlines and subsidiary AirTran Airways have received authority from the U.S. Department of Transportation for AirTran to operate new international services to Cancun International Airport from both Denver International Airport and Austin-Bergstrom International Airport

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New flight schedules released by Southwest Airlines and subsidiary AirTran Airways for August 12 through September 28 show that Southwest will offer new service in nine non-stop markets, including new service from Atlanta to Norfolk and Louisville, while AirTran will launch one new route.

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The airline says that, by summer 2012, it will offer more domestic flights and seats from New York’s three major airports than any other carrier, with more than 400 daily domestic departures from LaGuardia, JFK and Newark to destinations nationwide.

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Southwest Airlines and AirTran Airways are launching service to new destinations and offering new routes as they extend their flight schedules for reservations from June 3 through August 10, 2012. Several of the new AirTran routes and destinations are international.

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Icelandair will launch service from Denver on May 11, 2012 with four non-stop flights a week to Reykjavik in Iceland.

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