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

Generally, when trying to get a below average price for your ticket, try to book around 13 days before departure. For the cheapest possible price, our data suggests booking 52 days before departure.

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

With an average price of $271 return, United Airlines is not the cheapest airline to fly from Phoenix Sky Harbor Intl Airport to Denver with. Instead, for the lowest price, our data suggests flying with Frontier, where a return flight costs $145 on average.

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

Yes, United Airlines does offer direct flights for the route, with around 29 flights per week.

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

On average, the cheapest day of the week to fly from Phoenix Sky Harbor Intl Airport to Denver with United Airlines is Wednesday, when prices are around $61. The most expensive day is generally Saturday, where the average price is around $88.

What’s the cheapest month to fly from Phoenix Sky Harbor Intl Airport to Denver with United Airlines?

The cheapest month for United Airlines flights to Denver from Phoenix Sky Harbor Intl Airport is generally February, where plane tickets cost $133 on average. If possible, try to avoid the most expensive months of September and April, where tickets cost $240 and $292 respectively.

$69 Cheap United Airlines Flights from Phoenix Sky Harbor Intl Airport to Denver

PHX - DEN

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Flight Deals

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

Here are some of the best deals found on KAYAK recently from United Airlines for round-trip flights from Phoenix Sky Harbor Intl Airport to Denver that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

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 Phoenix Sky Harbor Intl Airport to Denver

Wed, Jan 14 - Sun, Jan 18

4:31 pm - 6:25 pm

PHX

DEN

1h 54mnonstop

11:24 am - 1:30 pm

DEN

PHX

2h 06mnonstop

$137United Airlines

Sat, Jan 10 - Tue, Jan 13

4:31 pm - 6:25 pm

PHX

DEN

1h 54mnonstop

9:40 am - 11:46 am

DEN

PHX

2h 06mnonstop

$148United Airlines

Mon, Jan 12 - Mon, Jan 19

6:45 am - 8:41 am

PHX

DEN

1h 56mnonstop

7:50 pm - 9:54 pm

DEN

PHX

2h 04mnonstop

$177United Airlines

Sat, Mar 14 - Sat, Mar 21

12:00 pm - 2:53 pm

PHX

DEN

1h 53mnonstop

9:05 pm - 10:11 pm

DEN

PHX

2h 06mnonstop

$235United Airlines

Mon, Jan 5 - Mon, Jan 12

8:10 am - 10:05 am

PHX

DEN

1h 55mnonstop

7:50 pm - 9:54 pm

DEN

PHX

2h 04mnonstop

$242United Airlines

Thu, May 14 - Fri, May 15

6:00 am - 8:55 am

PHX

DEN

1h 55mnonstop

1:25 pm - 2:28 pm

DEN

PHX

2h 03mnonstop

$245United Airlines

Mon, Dec 29 - Thu, Jan 1

8:10 am - 10:05 am

PHX

DEN

1h 55mnonstop

7:37 pm - 9:41 pm

DEN

PHX

2h 04mnonstop

$252United Airlines

Fri, Mar 27 - Sun, Mar 29

7:37 pm - 10:30 pm

PHX

DEN

1h 53mnonstop

7:15 pm - 8:19 pm

DEN

PHX

2h 04mnonstop

$271United Airlines

Fri, May 22 - Sun, May 24

6:30 pm - 9:17 pm

PHX

DEN

1h 47mnonstop

7:20 pm - 8:14 pm

DEN

PHX

1h 54mnonstop

$285United Airlines

Mon, Jan 5 - Thu, Jan 8

7:40 pm - 9:36 pm

PHX

DEN

1h 56mnonstop

9:43 am - 11:49 am

DEN

PHX

2h 06mnonstop

$320United Airlines

Useful Info

Low season	April
High season	December
Cheapest flight	$69
Average price round-trip	$277
Good deal one-way	$646

Best time to beat the crowds with an average 5% drop in price.

Most popular time to fly with an average 5% increase in price.

Flight from Phoenix Sky Harbor Airport to Denver

(avg. price over the last 2 weeks)

or less

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

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 Phoenix Sky Harbor Intl Airport to Denver?
Generally, when trying to get a below average price for your ticket, try to book around 13 days before departure. For the cheapest possible price, our data suggests booking 52 days before departure.
Is United Airlines the cheapest airline to fly with from Phoenix Sky Harbor Intl Airport to Denver?
With an average price of $271 return, United Airlines is not the cheapest airline to fly from Phoenix Sky Harbor Intl Airport to Denver with. Instead, for the lowest price, our data suggests flying with Frontier, where a return flight costs $145 on average.
What is the cheapest United Airlines flight from Phoenix Sky Harbor Intl Airport to Denver?
In the last 3 days, the lowest price for a flight with United Airlines from Phoenix Sky Harbor Intl Airport to Denver was $70 for a return flight and $51 for a one-way flight.
Does United Airlines fly direct to Denver from Phoenix Sky Harbor Intl Airport?
Yes, United Airlines does offer direct flights for the route, with around 29 flights per week.
What’s the cheapest day of the week to fly from Phoenix Sky Harbor Intl Airport to Denver with United Airlines?
On average, the cheapest day of the week to fly from Phoenix Sky Harbor Intl Airport to Denver with United Airlines is Wednesday, when prices are around $61. The most expensive day is generally Saturday, where the average price is around $88.
What’s the cheapest month to fly from Phoenix Sky Harbor Intl Airport to Denver with United Airlines?
The cheapest month for United Airlines flights to Denver from Phoenix Sky Harbor Intl Airport is generally February, where plane tickets cost $133 on average. If possible, try to avoid the most expensive months of September and April, where tickets cost $240 and $292 respectively.

7.4

Good9,092 verified ratings

7.3Comfort

6.6Food

7.7Boarding

7.1Entertainment

8.1Crew

Pros +

Flight was quick and easy. (in 2447 reviews)

Show reviews that mention

2.0 Poor

Sally, Dec 2025

LGA

DEN

It was 11 hours DELAYED BOARDED AND RE BOARDED 3 times

10.0 Wonderful

Roger, Dec 2025

CAE

ORD

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

6.0 Okay

Sue, Dec 2025

SJO

SFO

Movie selection is good. Crew did not understand mileage program and were no help. Sick later. Food?

10.0 Wonderful

Bill, Dec 2025

LHR

IAH

Staff on board was excellent. Positive upbeat helpful- like it used to be.

8.0 Very good

Eurico Hiromitsu, Dec 2025

ORD

GRU

Razoavel

8.0 Very good

Eurico Hiromitsu, Dec 2025

HND

ORD

Razoavel

10.0 Wonderful

Michele, Dec 2025

RSW

ORD

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

4.0 Mediocre

David, Dec 2025

AUA

EWR

For an expensive flight to another country, United has a lot of nerve serving pretzels and no meals (unless, of course, you want to buy something to eat). Unacceptable.

8.0 Very good

Steven, Dec 2025

SAN

DEN

The seats are not comfortable and cramped

10.0 Wonderful

Verified traveler, Dec 2025

MCI

IAH

It was great. No change

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

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Other airlines flying from Phoenix Sky Harbor Intl Airport to Denver

Frontier flights from Phoenix Sky Harbor Intl Airport to Denver

PHX - DEN

$69 Find Cheap United Airlines Flights from Phoenix Sky Harbor Intl Airport to Denver

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

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

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

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

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

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

Good to know

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

FAQs for flying to Denver with United Airlines

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

Generally, when trying to get a below average price for your ticket, try to book around 13 days before departure. For the cheapest possible price, our data suggests booking 52 days before departure.

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

With an average price of $271 return, United Airlines is not the cheapest airline to fly from Phoenix Sky Harbor Intl Airport to Denver with. Instead, for the lowest price, our data suggests flying with Frontier, where a return flight costs $145 on average.

What is the cheapest United Airlines flight from Phoenix Sky Harbor Intl Airport to Denver?

In the last 3 days, the lowest price for a flight with United Airlines from Phoenix Sky Harbor Intl Airport to Denver was $70 for a return flight and $51 for a one-way flight.

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

Yes, United Airlines does offer direct flights for the route, with around 29 flights per week.

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

On average, the cheapest day of the week to fly from Phoenix Sky Harbor Intl Airport to Denver with United Airlines is Wednesday, when prices are around $61. The most expensive day is generally Saturday, where the average price is around $88.

What’s the cheapest month to fly from Phoenix Sky Harbor Intl Airport to Denver with United Airlines?

The cheapest month for United Airlines flights to Denver from Phoenix Sky Harbor Intl Airport is generally February, where plane tickets cost $133 on average. If possible, try to avoid the most expensive months of September and April, where tickets cost $240 and $292 respectively.

United Airlines Customer Reviews

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

Other airlines flying from Phoenix Sky Harbor Intl Airport to Denver

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

Cabin class types available on flights to Denver

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

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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.

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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.