mon, dec 9 - fri, dec 13 msp minneapolis - st. paul intl. phx sky harbor intl. $68 roundtrip, found 1 hour ago $68 roundtrip found 1 hour ago select frontier airlines flight, departing mon, dec 9 from minneapolis - st. paul intl. to sky harbor intl., returning fri, dec 13, priced at $68 found 1 hour ago