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

Generally, when trying to get a below average price for your ticket, try to book around 19 days before departure. For the cheapest possible price, our data suggests booking 85 days before departure.

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

With an average price of $217 return, Frontier 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 Frontier fly direct to Phoenix Sky Harbor Intl Airport from Chicago?

No, Frontier does not fly the route directly.

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

On average, the cheapest day of the week to fly from Chicago to Phoenix Sky Harbor Intl Airport with Frontier is Friday, when prices are around $29. The most expensive day is generally Wednesday, where the average price is around $63.

What’s the cheapest month to fly from Chicago to Phoenix Sky Harbor Intl Airport with Frontier?

The cheapest month for Frontier flights to Phoenix Sky Harbor Intl Airport from Chicago is generally April, where plane tickets cost $93 on average. If possible, try to avoid the most expensive months of October and December, where tickets cost $171 and $198 respectively.

$107 Cheap Frontier Flights from Chicago to Phoenix Sky Harbor Intl Airport

CHI - PHX

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Flight Deals

Cheap Frontier 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 Frontier flight deals from Chicago to Phoenix Sky Harbor Intl Airport

vie., oct. 23 - mié., oct. 28

4:00 pm - 5:59 pm

ORD

PHX

3h 59mnonstop

5:55 pm - 5:35 am

PHX

ORD

9h 40m

1 stop

$199Frontier

mié., oct. 14 - jue., oct. 22

2:46 pm - 8:54 pm

ORD

PHX

8h 08m

1 stop

7:04 pm - 12:33 am

PHX

ORD

3h 29mnonstop

$200Frontier

jue., oct. 15 - lun., oct. 19

4:00 pm - 5:59 pm

ORD

PHX

3h 59mnonstop

5:55 pm - 5:42 am

PHX

ORD

9h 47m

1 stop

$203Frontier

mié., sep. 9 - sáb., sep. 12

6:50 am - 9:35 pm

ORD

PHX

16h 45m

1 stop

5:55 pm - 5:42 am

PHX

ORD

9h 47m

1 stop

$205Frontier

vie., oct. 23 - jue., oct. 29

6:05 am - 11:29 am

ORD

PHX

7h 24m

1 stop

7:04 pm - 12:33 am

PHX

ORD

3h 29mnonstop

$206Frontier

vie., oct. 16 - mar., oct. 20

4:00 pm - 5:59 pm

ORD

PHX

3h 59mnonstop

5:55 pm - 5:42 am

PHX

ORD

9h 47m

1 stop

$207Frontier

vie., oct. 9 - mar., oct. 13

4:00 pm - 5:59 pm

ORD

PHX

3h 59mnonstop

9:00 am - 8:25 pm

PHX

ORD

9h 25m

1 stop

$208Frontier

vie., oct. 16 - mar., oct. 20

4:00 pm - 5:59 pm

ORD

PHX

3h 59mnonstop

5:55 pm - 5:42 am

PHX

ORD

9h 47m

1 stop

$209Frontier

lun., oct. 19 - jue., oct. 22

4:00 pm - 5:59 pm

ORD

PHX

3h 59mnonstop

5:55 pm - 5:42 am

PHX

ORD

9h 47m

1 stop

$210Frontier

sáb., oct. 10 - lun., oct. 12

11:06 am - 5:02 pm

ORD

PHX

7h 56m

1 stop

7:04 pm - 12:33 am

PHX

ORD

3h 29mnonstop

$212Frontier

Useful Info

Low season	June
High season	March
Cheapest flight	$107
Average price round-trip	$382
Good deal round-trip	$325

Best time to beat the crowds but there is an average 5% increase in price.

Most popular time to fly with an average 30% 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 Frontier 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 Frontier from Chicago to Phoenix Sky Harbor Intl Airport?
Generally, when trying to get a below average price for your ticket, try to book around 19 days before departure. For the cheapest possible price, our data suggests booking 85 days before departure.
Is Frontier the cheapest airline to fly with from Chicago to Phoenix Sky Harbor Intl Airport?
With an average price of $217 return, Frontier 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 Frontier flight from Chicago to Phoenix Sky Harbor Intl Airport?
In the last 3 days, the lowest price for a flight with Frontier from Chicago to Phoenix Sky Harbor Intl Airport was $204 for a return flight and $88 for a one-way flight.
Does Frontier fly direct to Phoenix Sky Harbor Intl Airport from Chicago?
No, Frontier does not fly the route directly.
What’s the cheapest day of the week to fly from Chicago to Phoenix Sky Harbor Intl Airport with Frontier?
On average, the cheapest day of the week to fly from Chicago to Phoenix Sky Harbor Intl Airport with Frontier is Friday, when prices are around $29. The most expensive day is generally Wednesday, where the average price is around $63.
What’s the cheapest month to fly from Chicago to Phoenix Sky Harbor Intl Airport with Frontier?
The cheapest month for Frontier flights to Phoenix Sky Harbor Intl Airport from Chicago is generally April, where plane tickets cost $93 on average. If possible, try to avoid the most expensive months of October and December, where tickets cost $171 and $198 respectively.

5.6

Fair2,946 verified ratings

5.5Comfort

5.9Boarding

4.5Food

4.3Entertainment

6.6Crew

10.0 Wonderful

Iman, May 2026

BOS

RDU

Excellent service.

10.0 Wonderful

David, May 2026

LAS

DEN

Everything just worked

8.0 Very good

jose, May 2026

SDQ

PHL

Great

10.0 Wonderful

David, May 2026

MCO

SJU

No internet and no complimentary drinks

6.0 Okay

Verified traveler, May 2026

PHX

LAS

The staff at the check in counter was so rude. Made you feel Incompetent

2.0 Poor

Dan, May 2026

PHX

DEN

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

2.0 Poor

Harris, May 2026

RDU

ORD

Flight was scheduled at 9:40pm. Got delayed to 10 am, the next day. crazy

2.0 Poor

Stephen, Apr 2026

PHX

ORD

The bag check, flight check-in, and onboard experience convinced my wife and me that we will actively go out of our way to avoid flying Frontier Airlines in the future. At bag check, we were informed that check-in could only be completed via the Frontier mobile app. Unfortunately, the app was extremely frustrating—sending us through repetitive, confusing loops that repeatedly forced us to decline add-on services with nearly every click. While most airline apps upsell, this one felt intentionally exhausting. As the process dragged on, we became genuinely concerned that my phone battery would die before check-in could be completed. We approached the bag check staff—who were standing together talking—and explained both our frustration and our predicament. They laughed. Later, my wife described the interaction as “gaslighting,” which felt accurate. We were then informed it would cost $25 per person simply to have our boarding passes printed. From that point forward, the tone of the experience was consistently hostile. The bag check employees were condescending and combative, behaving more like bullies than customer service staff. Unfortunately, that same attitude continued onboard. One flight attendant argued with me when I attempted to stow my backpack in the overhead bin. I explained that we had each paid $75 to check our bags specifically so we would not need to use carry-on space and could have adequate legroom. She demanded to see my ticket, pointed out that it said “no carry-on”—which I acknowledged—and I reiterated that this was precisely why we paid to check our bags. Her response was, “I don’t make the rules.” She then walked away, but not before asking if I “truly wanted to fly back to Chicago today?”—an unnecessary and unmistakable threat. It is also worth noting that despite booking our tickets together in the same transaction, we were not seated together. Upon our return to Chicago—where we could once again sit together—we compared onboard experiences. We both remarked on how unhappy the flight attendants appeared and how each of us was separately asked whether we would like to purchase a beverage. We declined. At no point was water mentioned as an option, leaving us with the clear impression that even water came at a cost—or that complimentary water, if available at all, was deliberately left unmentioned. Overall, the experience was shocking and deeply disappointing, but it was also a profound learning experience—one we will not forget and will not repeat. -Steve

4.0 Mediocre

Derrick, Apr 2026

DTW

MCO

Plane was hot and miserable and the crew was rude!

2.0 Poor

Netia, Apr 2026

DEN

PHX

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

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

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CHI - PHX

$107 Find Cheap Frontier Flights from Chicago to Phoenix Sky Harbor Intl Airport

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

Cheap Frontier Flight Deals from Chicago to Phoenix Sky Harbor Intl Airport

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

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

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

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

Good to know

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

FAQs for flying to Phoenix Sky Harbor Intl Airport with Frontier

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

Generally, when trying to get a below average price for your ticket, try to book around 19 days before departure. For the cheapest possible price, our data suggests booking 85 days before departure.

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

With an average price of $217 return, Frontier 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 Frontier flight from Chicago to Phoenix Sky Harbor Intl Airport?

In the last 3 days, the lowest price for a flight with Frontier from Chicago to Phoenix Sky Harbor Intl Airport was $204 for a return flight and $88 for a one-way flight.

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

No, Frontier does not fly the route directly.

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

On average, the cheapest day of the week to fly from Chicago to Phoenix Sky Harbor Intl Airport with Frontier is Friday, when prices are around $29. The most expensive day is generally Wednesday, where the average price is around $63.

What’s the cheapest month to fly from Chicago to Phoenix Sky Harbor Intl Airport with Frontier?

The cheapest month for Frontier flights to Phoenix Sky Harbor Intl Airport from Chicago is generally April, where plane tickets cost $93 on average. If possible, try to avoid the most expensive months of October and December, where tickets cost $171 and $198 respectively.

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

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