Only have time to travel in the summer?  We don't see sales for summer travel too often, but Frontier has just given us an Easter Egg Sale.  Travel is valid Mon-Thu between Jun. 1 - Sep. 8, 2011.  No blackout dates are listed, but seats will be scarce or unavailable around peak holiday dates.  Prices are higher than their current unadvertised sale for spring travel, but good deals can be had for summer travel with this sale.  Tickets must be booked by 11:59 pm ET Apr. 12, 2011.

Sample fares include:

Kansas City to Denver $138 round-trip

Denver to Tuscon $128 round-trip

Oklahoma City to Denver $138 round-trip

Denver Las Vegas $138 round-trip

Denver to Provo $118 round-trip