In May, Portugal&#x27;s hills are blanketed in wildflowers while temperatures fluctuate between a comfortable 60 and 70 degrees. In that sweet spot between off-peak and peak seasons, prices remain low and you will be able to take in all the beauty of Lisbon&#x27;s architecture at your own pace, shop in Porto without marked-up high season prices, or visit the country&#x27;s under-appreciated beaches before they&#x27;re packed with vacationers. Need more incentive? Thanks to some recent airline partnerships…