Cheap Flights From Sky Harbor Intl. (PHX) To O'Hare Intl. (ORD)

If you're eager to fly direct from Sky Harbor Intl. Airport (PHX) to O'Hare Airport, you have plenty of options. Below are the most popular airlines that will get you to Chicago without any fuss:

• American Airlines - (AA) with 265 flights every month
• United Airlines - (UA) with 134 flights every month
• Southwest Airlines - (WN) with 65 flights every month
• Frontier Airlines - (F9) with 30 flights every month

Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.