Wenatchee Fares. Be a little flexible with your flight itinerary and you could save some cash; that's because some days are cheaper for flying than others. There are two specific days that are cheapest for air passengers. Those days are likely to yield the best rates for departures and arrivals. But remember: This isn't an exact science. The universal consensus seems to be that airfares tend to be lowest for flights that depart on Tuesdays and Wednesdays.