Cheap flights from Illinois to Phoenix from $63

In general, August is the cheapest month to fly from Illinois to Phoenix Sky Harbor Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $229. If you are unable to visit Phoenix Sky Harbor Intl Airport during the month of August, then departing from Illinois during the month September is also very affordable. Most momondo users find prices during this month for around $229.

On average, the least expensive day to fly to Phoenix Sky Harbor Intl Airport from Illinois is on a Saturday. momondo users have found tickets for Saturday departures for as low as $296. However, this price may fluctuate depending on the airline, the season, and holidays. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $353. These prices are subject to change though, so be sure to set up a Price Alert for flights to Phoenix Sky Harbor Intl Airport.

In the evening is the cheapest time of day to fly from Illinois to Phoenix Sky Harbor Intl Airport when you can find flight prices for as low as $283. Flying to Phoenix Sky Harbor Intl Airport in the evening is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the morning because they tend to be around $315. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Chicago O'Hare Intl to Phoenix Sky Harbor Intl for the best Illinois - Phoenix Sky Harbor Intl flight prices

You are more likely to see cheaper flights to Phoenix Sky Harbor Intl Airport from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Phoenix Sky Harbor Intl Airport for around $281 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Phoenix Sky Harbor Intl Airport from Illinois for as low as $258 on momondo.

There are 4 cabin classes available to choose from on Illinois to Phoenix Sky Harbor Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Southwest, Delta, and Alaska Airlines are the most popular carriers operating from Illinois to Phoenix Sky Harbor Intl

American Airlines, Frontier and United Airlines are the top three most popular airlines that fly to Phoenix Sky Harbor Intl Airport from Illinois according to our data. American Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Phoenix Sky Harbor Intl Airport. Keep in mind that there are 9 different airlines that fly to Phoenix Sky Harbor Intl Airport on a routine basis, so you have a few additional options to choose from.

As of February 2026, there are 52 flights per day flying from Illinois to Phoenix Sky Harbor Intl Airport. The most common time of day flights depart is 7:00PM, with 36% of flights taking off in the afternoon.

As of February 2026, 365 flights take off from Illinois and land in Phoenix Sky Harbor Intl Airport each week. The most common flight departure day for this route is Mon, with 19% of weekly flights taking off on this day.