To save on the cost of your flight from Prestwick to Chicago-O'Hare Intl, book at least 61 days before your planned departure. Booking around this time can save you about 32% on the cost of this flight compared to booking a flight leaving this week. We have found prices from £389 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as £470.
Flights from Prestwick to Chicago-O'Hare Intl lean towards being more expensive in July. Prices are generally better when you fly from Prestwick to Chicago-O'Hare Intl in October, with the cheapest ticket starting at £255.
At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Prestwick and Chicago-O'Hare Intl for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.
When travelling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Prestwick is roughly less than Chicago-O'Hare Intl. You can assume this to be the case over the next 7 days.
With an average temperature of 30 °C, peak weather can be found in July. As a traveller, expect to see changes in flight prices during that period. The temperatures in Chicago-O'Hare Intl are hotter than in Prestwick.