How far in advance should I book tickets for a flight with United Airlines from Chicago to Phoenix Sky Harbor Intl Airport?

Generally, when trying to get a below average price for your ticket, try to book around 7 days before departure. For the cheapest possible price, our data suggests booking 82 days before departure.

Is United Airlines the cheapest airline to fly with from Chicago to Phoenix Sky Harbor Intl Airport?

With an average price of $342 return, United Airlines is not the cheapest airline to fly from Chicago to Phoenix Sky Harbor Intl Airport with. Instead, for the lowest price, our data suggests flying with Allegiant Air, where a return flight costs $215 on average.

Does United Airlines fly direct to Phoenix Sky Harbor Intl Airport from Chicago?

Yes, United Airlines does offer direct flights for the route, with around 34 flights per week.

$127 Cheap United Airlines Flights from Chicago to Phoenix Sky Harbor Intl Airport

Save 20% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals

Cheap United Airlines Flight Deals from Chicago to Phoenix Sky Harbor Intl Airport

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip United Airlines flight deals from Chicago to Phoenix Sky Harbor Intl Airport

Sat, Sep 5 - Fri, Sep 11

11:00 am - 12:56 pm

ORD

PHX

3h 56mnonstop

7:10 am - 12:49 pm

PHX

ORD

3h 39mnonstop

$253United Airlines

Thu, Aug 20 - Sat, Aug 22

12:47 pm - 5:56 pm

ORD

PHX

7h 09m

1 stop

2:19 pm - 7:58 pm

PHX

ORD

3h 39mnonstop

$259United Airlines

Sat, Aug 29 - Mon, Aug 31

4:20 pm - 6:13 pm

ORD

PHX

3h 53mnonstop

3:19 pm - 10:46 pm

PHX

ORD

5h 27m

1 stop

$263United Airlines

Wed, Sep 2 - Sun, Sep 6

11:00 am - 12:56 pm

ORD

PHX

3h 56mnonstop

9:00 am - 2:43 pm

PHX

ORD

3h 43mnonstop

$266United Airlines

Wed, Sep 9 - Fri, Sep 11

9:12 am - 11:08 am

ORD

PHX

3h 56mnonstop

11:28 am - 5:05 pm

PHX

ORD

3h 37mnonstop

$269United Airlines

Thu, Sep 3 - Sun, Sep 6

12:47 pm - 5:56 pm

ORD

PHX

7h 09m

1 stop

11:28 am - 5:05 pm

PHX

ORD

3h 37mnonstop

$272United Airlines

Sat, Sep 5 - Tue, Sep 8

12:45 pm - 5:10 pm

ORD

PHX

6h 25m

1 stop

7:10 am - 12:49 pm

PHX

ORD

3h 39mnonstop

$276United Airlines

Fri, Sep 4 - Mon, Sep 7

11:00 am - 12:56 pm

ORD

PHX

3h 56mnonstop

6:20 am - 11:59 am

PHX

ORD

3h 39mnonstop

$278United Airlines

Mon, Nov 2 - Wed, Nov 4

12:55 pm - 3:57 pm

ORD

PHX

4h 02mnonstop

12:20 pm - 5:00 pm

PHX

ORD

3h 40mnonstop

$279United Airlines

Thu, Sep 3 - Sun, Sep 6

11:00 am - 12:56 pm

ORD

PHX

3h 56mnonstop

2:19 pm - 7:58 pm

PHX

ORD

3h 39mnonstop

$282United Airlines

Useful Info

KAYAK's insights & trends for Chicago to Phoenix Sky Harbor Intl Airport flights

Get data-powered insights and trends into United Airlines flights from Chicago to Phoenix Sky Harbor Intl Airport to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Chicago to Phoenix Sky Harbor Intl Airport with United Airlines?

With United Airlines the cheapest day to fly this route is on Saturday. The most expensive day is Monday.

What is the cheapest month to fly with United Airlines from Chicago to Phoenix Sky Harbor Intl Airport?

The cheapest month for United Airlines flights from Chicago to Phoenix Sky Harbor Intl Airport is January, where tickets cost $284 (return) on average. On the other hand, the most expensive months to fly this route on United Airlines are July and March, where the average cost of round-trip tickets is $398 and $387 respectively.

Which cabin class options are available on United Airlines flights between Chicago and Phoenix Sky Harbor Intl Airport?

Cabin class availability will depend on the aircraft model and specific route. United Airlines flights on this route offer Economy Class ($341 on average), Prem Economy Class ($794 on average), Business Class ($1,176 on average) and First Class ($1,122 on average).

How far in advance should I book a flight from Chicago to Phoenix Sky Harbor Intl Airport with United Airlines?

For the absolute cheapest price on United Airlines, our data suggests you should book 4 weeks before departure.

Low season	August
High season	March
Cheapest flight	$127
Average price round-trip	$288
Good deal one-way	$474

Best time to beat the crowds with an average 14% drop in price.

Most popular time to fly with an average 19% increase in price.

Flight from Chicago O'Hare Airport to Phoenix Sky Harbor Airport

(avg. price over the last 2 weeks)

or less

When to Book Flights with United Airlines from Chicago to Phoenix Sky Harbor Intl Airport

Average price per month

Flight prices as travel date approaches

How far in advance should I book tickets for a flight with United Airlines from Chicago to Phoenix Sky Harbor Intl Airport?
Generally, when trying to get a below average price for your ticket, try to book around 7 days before departure. For the cheapest possible price, our data suggests booking 82 days before departure.
Is United Airlines the cheapest airline to fly with from Chicago to Phoenix Sky Harbor Intl Airport?
With an average price of $342 return, United Airlines is not the cheapest airline to fly from Chicago to Phoenix Sky Harbor Intl Airport with. Instead, for the lowest price, our data suggests flying with Allegiant Air, where a return flight costs $215 on average.
What is the cheapest United Airlines flight from Chicago to Phoenix Sky Harbor Intl Airport?
In the last 5 days, the lowest price for a flight with United Airlines from Chicago to Phoenix Sky Harbor Intl Airport was $207 for a return flight and $122 for a one-way flight.
Does United Airlines fly direct to Phoenix Sky Harbor Intl Airport from Chicago?
Yes, United Airlines does offer direct flights for the route, with around 34 flights per week.
What’s the cheapest day of the week to fly from Chicago to Phoenix Sky Harbor Intl Airport with United Airlines?
On average, the cheapest day of the week to fly from Chicago to Phoenix Sky Harbor Intl Airport with United Airlines is Tuesday, when prices are around $81. The most expensive day is generally Saturday, where the average price is around $148.
What’s the cheapest month to fly from Chicago to Phoenix Sky Harbor Intl Airport with United Airlines?
The cheapest month for United Airlines flights to Phoenix Sky Harbor Intl Airport from Chicago is generally January, where plane tickets cost $144 on average. If possible, try to avoid the most expensive months of August and March, where tickets cost $243 and $245 respectively.

7.4

Good10,000 verified ratings

6.7Food

7.3Comfort

7.1Entertainment

8.1Crew

7.7Boarding

10.0 Wonderful

Mark, Aug 2026

RDU

FRA

Staff and flight attendants were very polite. Flight was smooth. My seat on the plane was a bit broken so it would not stay in upright position but it was fine for the most part.

10.0 Wonderful

James, Aug 2026

RNO

IAH

Flight staff and all was fine. Food always sucks on planes so nothing new.

6.0 Okay

N, Jul 2026

ORD

ABQ

Ok could have been better.

4.0 Mediocre

N, Jul 2026

PHL

ORD

The flight crew were very helpful. The seats were very close together. There was barely room to sit without touching the person next to you.

8.0 Very good

Vicente, Jul 2026

IAH

PTY

Good

6.0 Okay

Vicente, Jul 2026

MSY

IAH

Food

10.0 Wonderful

Derreck, Jul 2026

IAH

ORD

I’m an EP on AA every year for more than a decade but this was a very pleasant and surprising experience. Clean and sizable plane for HOU to CHI. 5 row first class. And excellent food in first class the steak option was really good. Your flight attendants even better. Seat 5A

10.0 Wonderful

Pat, Jul 2026

BCN

SFO

The entire experience convinced my wife, Cathy, and me that traveling Polaris on United is the only way we’ll fly in the future. From check-in and baggage drop to the end of the 12-hour flight, the customer service was exceptional, with numerous staff members exemplifying the very best in care. On board, Andre, our primary crew chief, was sincerely friendly, a consummate professional, and, along with Freddy, one of his team members, truly among the best of the best. The captain even came through the cabin to chat with passengers—a wonderful personal touch, especially on such a long journey.

4.0 Mediocre

Verified traveler, Jul 2026

ATH

IAD

Entertainment center did not work and no electric available at seat for 11 hour flight. Didn’t have access to overhead light or call button. Food was tasteless and had a high salt (27 %) of recommended daily salt intake

2.0 Poor

Andrew, Jul 2026

EWR

DFW

Flight got cancelled

Everything you need to know for your flight from Chicago to Phoenix Sky Harbor Intl Airport

Airlines

Cabin class

Complete your trip

Flights to other cities

Return flight deals

United Airlines flights

Other airlines flying from Chicago to Phoenix Sky Harbor Intl Airport

American Airlines flights from Chicago to Phoenix Sky Harbor Intl Airport

Frontier flights from Chicago to Phoenix Sky Harbor Intl Airport

Southwest flights from Chicago to Phoenix Sky Harbor Intl Airport

Delta flights from Chicago to Phoenix Sky Harbor Intl Airport

CHI - PHX

$127 Find Cheap United Airlines Flights from Chicago to Phoenix Sky Harbor Intl Airport - Compare and Save

Cheap United Airlines Flight Deals from Chicago to Phoenix Sky Harbor Intl Airport

Recent round-trip United Airlines flight deals from Chicago to Phoenix Sky Harbor Intl Airport

Recent one-way United Airlines flight deals from Chicago to Phoenix Sky Harbor Intl Airport

Recent last minute United Airlines flight deals from Chicago to Phoenix Sky Harbor Intl Airport

Recent direct United Airlines flight deals from Chicago to Phoenix Sky Harbor Intl Airport

KAYAK's insights & trends for Chicago to Phoenix Sky Harbor Intl Airport flights

What’s the cheapest day of the week to fly from Chicago to Phoenix Sky Harbor Intl Airport with United Airlines?

What is the cheapest month to fly with United Airlines from Chicago to Phoenix Sky Harbor Intl Airport?

Which cabin class options are available on United Airlines flights between Chicago and Phoenix Sky Harbor Intl Airport?

How far in advance should I book a flight from Chicago to Phoenix Sky Harbor Intl Airport with United Airlines?

Good to know

Low season

High season

Cheapest flight

Average price round-trip

Good deal one-way

When to Book Flights with United Airlines from Chicago to Phoenix Sky Harbor Intl Airport

FAQs for flying to Phoenix Sky Harbor Intl Airport with United Airlines

United Airlines Customer Reviews

Traveler rating:

Sort by:

Everything you need to know for your flight from Chicago to Phoenix Sky Harbor Intl Airport

Other airlines flying from Chicago to Phoenix Sky Harbor Intl Airport

Flight deals from the most popular airlines with KAYAK users flying the route

Cabin class types available on flights to Phoenix Sky Harbor Intl Airport

Cabin classes available on flights from Chicago to Phoenix Sky Harbor Intl Airport. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Complete your trip to Phoenix Sky Harbor Intl Airport with a hotel stay or car rental

Flights to other popular destinations

The most popular flights on KAYAK according to clicks in the last 2 weeks. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Find deals for your return flight

Top United Airlines flights

The most popular destinations for flights with United Airlines according to clicks from KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.