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 14 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 $338 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 27 flights per week.

$128 Cheap United Airlines Flights from Chicago to Phoenix Sky Harbor Intl Airport

CHI - PHX

Search hundreds of travel sites at once for deals on United Airlines flights from Chicago to Phoenix Sky Harbor Intl Airport

...and more

Travelers love KAYAK

41,299,237 searches in the past 7 days on KAYAK

Save 21% or moreCompare multiple travel sites with one search.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

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

Wed, Jul 29 - Tue, Aug 4

8:30 pm - 10:27 pm

ORD

PHX

3h 57mnonstop

2:45 pm - 8:27 pm

PHX

ORD

3h 42mnonstop

$245United Airlines

Wed, Jul 15 - Tue, Jul 21

5:00 am - 9:00 am

ORD

PHX

6h 00m

1 stop

5:49 pm - 11:31 pm

PHX

ORD

3h 42mnonstop

$255United Airlines

Thu, Aug 6 - Tue, Aug 11

8:30 pm - 10:27 pm

ORD

PHX

3h 57mnonstop

4:26 pm - 10:05 pm

PHX

ORD

3h 39mnonstop

$257United Airlines

Tue, Jun 30 - Tue, Jul 7

9:02 am - 11:03 am

ORD

PHX

4h 01mnonstop

2:45 pm - 8:27 pm

PHX

ORD

3h 42mnonstop

$260United Airlines

Thu, Aug 20 - Tue, Aug 25

12:47 pm - 5:56 pm

ORD

PHX

7h 09m

1 stop

11:28 am - 5:05 pm

PHX

ORD

3h 37mnonstop

$263United Airlines

Wed, Jul 15 - Wed, Jul 15

5:00 am - 9:00 am

ORD

PHX

6h 00m

1 stop

4:12 pm - 12:45 am

PHX

ORD

6h 33m

1 stop

$265United Airlines

Thu, Aug 6 - Wed, Aug 12

8:30 pm - 10:27 pm

ORD

PHX

3h 57mnonstop

3:19 pm - 10:46 pm

PHX

ORD

5h 27m

1 stop

$267United Airlines

Thu, Aug 6 - Mon, Aug 10

9:02 am - 11:03 am

ORD

PHX

4h 01mnonstop

6:50 am - 12:28 pm

PHX

ORD

3h 38mnonstop

$269United Airlines

Tue, Jun 30 - Tue, Jul 7

9:02 am - 11:03 am

ORD

PHX

4h 01mnonstop

4:12 pm - 12:45 am

PHX

ORD

6h 33m

1 stop

$270United Airlines

Thu, Sep 3 - Sun, Sep 6

11:00 am - 12:56 pm

ORD

PHX

3h 56mnonstop

5:20 pm - 11:00 pm

PHX

ORD

3h 40mnonstop

$272United 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 $287 (return) on average. On the other hand, the most expensive months to fly this route on United Airlines are March and June, where the average cost of round-trip tickets is $388 and $382 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 ($338 on average), Prem Economy Class ($735 on average), Business Class ($1,186 on average) and First Class ($1,079 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	$128
Average price round-trip	$373
Good deal one-way	$732

Best time to beat the crowds with an average 11% drop in price.

Most popular time to fly with an average 21% 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 14 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 $338 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 $269 for a return flight and $127 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 27 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 March and August, where tickets cost $242 and $269 respectively.

7.4

Good9,861 verified ratings

7.7Boarding

8.1Crew

7.3Comfort

7.1Entertainment

6.7Food

10.0 Wonderful

Joanne, Jun 2026

DEN

ORD

Very easy ! Use the kiosk and bag drop and right to security within 10 min

8.0 Very good

Indrashis, Jun 2026

BOI

DEN

Ok ok

4.0 Mediocre

David, Jun 2026

FAR

DEN

Checking bag at terminal was horrible. No agents to check us in and only 1 kiosk working. Boarding went ok. Crew onboard was very scattered rained. Missed our row while serving and then didn’t see them hardly again.

6.0 Okay

Bridgette, Jun 2026

EWR

MCI

Crew was amazing, takeoff wonderful. The bathroom was disgusting from before takeoff the odor made the flight uncomfortable as you could smell the bathroom from the center of the plane where we were sitting. Smelled like raw sewage. My daughter was throwing up as we landed due to the smell and horrible turbulence as we approached Newark.

2.0 Poor

Greg, Jun 2026

YYZ

ORD

Prefer not to have an almost 3 hour delay with useless communication that wasn't accurate.

10.0 Wonderful

Sallie, Jun 2026

SNA

ORD

Tv kept blipping out and in.

10.0 Wonderful

Lori, Jun 2026

PVG

LAX

Smooth check-in and boarding; pleasant workers;

2.0 Poor

Verified traveler, Jun 2026

ORF

EWR

Airline tickets are not cheap. You expect reliable competent service. Thanks to canceled flights and botched transfers we arrived at our destination two days late. This is not acceptable

10.0 Wonderful

HASHMAT, Jun 2026

HND

IAH

We need to have wifi

8.0 Very good

Diems, Jun 2026

FIH

BRU

Everything was very good

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

Frontier flights from Chicago to Phoenix Sky Harbor Intl Airport

American Airlines 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

$128 Find Cheap United Airlines Flights from Chicago to Phoenix Sky Harbor Intl Airport

Search hundreds of travel sites at once for deals on United Airlines flights from Chicago to Phoenix Sky Harbor Intl Airport

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

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.