Frontier Airlines adds 4 routes to Phoenix Sky Harbor schedule

PHOENIX — Low-cost carrier Frontier Airlines announced service to four more cities to and from Phoenix starting in the winter.

The Denver-based airline planned to fly four times a week from Sky Harbor to St. Louis, Missouri and Milwaukee, Wisconsin and three times a week to Des Moines, Iowa and Nashville, Tennessee.

Travel starts Dec. 6-7.

#Phoenix, we have 4 new routes for you! ✈️ https://t.co/GGlwagRZam pic.twitter.com/xxDNXfSKkr

— Frontier Airlines (@FlyFrontier) August 9, 2016

To promote the new routes, Frontier was offering $59 one-way deals to St. Louis and Des Moines and $69 one-way deals to Milwaukee and Nashville.

Traffic overwhelmed the website Wednesday morning. Many hopefuls trying to book flight experienced difficulty connecting to the site.

Earlier this year, Frontier added Atlanta, Cincinnati, Cleveland and Detroit to its Phoenix schedule.

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