Phoenix to Denver
Compare Phoenix (PHX) to Denver (DEN) airfare across Southwest, United, Frontier, and Spirit, track fare trends on one of the busiest short-haul routes in the Mountain West, and trade the desert for the Rockies in about 1 hour 50 minutes.
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PHX–DEN
Distance
969 KM
Flight Time
1H 50M
Weekly Flights
130+
Fares From
$39
Carriers
WN · UA · F9 · NK
Cheap Flights from Phoenix to Denver — Compare Our Best Deals
With 130+ nonstop weekly departures, Phoenix to Denver is one of the busiest short-haul routes in the Mountain West, anchored by two of United and Frontier’s hub cities. Browse one-way fares from $39, round-trip fares from $69, and compare Southwest’s high-frequency schedule against United, Frontier, and Spirit.
PHX Phoenix ✈ DEN Denver
One Way
$39
per person, incl. taxes · nonstop · Southwest, United, Frontier, Spirit
PHX Phoenix ✈ DEN Denver
Round Trip
$69
per person, incl. taxes · nonstop · Southwest, United, Frontier, Spirit
Airlines with Flights from Phoenix to Denver
PHX–DEN runs nonstop on four carriers at near-hourly frequency, one of the most competitively priced short routes in the region.
| Airline | Base / Hub | Weekly Departures | Flight Time | Code |
|---|---|---|---|---|
| Southwest Airlines | Phoenix (PHX) base | ~45 nonstop | 1h 45m – 1h 55m | WN |
| United Airlines | Denver (DEN) hub | ~35 nonstop | 1h 50m | UA |
| Frontier Airlines | Denver (DEN) hub | ~30 nonstop | 1h 50m | F9 |
| Spirit Airlines | Multi-hub network | ~14 nonstop | 1h 55m | NK |
Cheap Flights from Phoenix to Denver — Direct Flights, Duration & Best Travel Time
Data-backed insights on the PHX–DEN route to help you book smarter and time your trip well.
19
Daily Flights
Sept
Cheapest Month
1h 51m
Avg. Flight Duration
Dec
602 mi
100%
Nonstop Flights
Insights About Flying from Phoenix to Denver
Why Fly to Denver from Phoenix?
Denver is the gateway to the Rockies — a walkable, craft-beer-heavy downtown backed by some of the best skiing and hiking in the country.
01
Rocky Mountain Gateway
Denver International sits about an hour from Rocky Mountain National Park and within reach of world-class ski resorts like Vail, Breckenridge, and Aspen.
02
LoDo & Larimer Square
Denver’s historic Lower Downtown district blends restored Victorian-era buildings with breweries, rooftop bars, and Coors Field.
03
Red Rocks Amphitheatre
One of the most famous concert venues in the world, carved into red sandstone formations about 30 minutes from downtown.
04
Denver Art Museum
A striking architectural landmark housing one of the largest collections of American Indian art in the country.
05
Denver’s Craft Beer Scene
With one of the highest breweries-per-capita rates in the U.S., Denver has become a genuine craft beer destination in its own right.
06
Winter Ski Season
For Phoenix skiers, Denver remains the fastest way to reach Colorado’s famed resorts — the driving factor behind this route’s December–February peak.
PHX & DEN — Quick Facts
Phoenix Sky Harbor Intl
Distance to Downtown Minneapolis
Known For
Transit to Downtown
Time Zone
Denver International
ICAO Code
Distance to the Strip
1 (A/B/C concourses)
Known For
Taxi to the Strip
Time Zone
How to Find the Cheapest Phoenix–Denver Fares
01
Book 3–5 Weeks Ahead for Winter Travel
Seasonal ski demand pushes fares up fast in peak winter months — book further out than you would in shoulder season.
02
Fly Tuesday or Wednesday
Midweek departures are consistently cheaper than Friday or Sunday flights during peak winter travel periods.
03
Compare All Four Carriers
Southwest, United, Frontier, and Spirit all fly nonstop at high frequency — price out bags and seat selection on each before booking.
04
Travel in Shoulder Season
September and early October typically offer the best combination of price and availability before winter demand kicks in.
05
Set a Fare Alert
Winter capacity fills quickly on this route — an alert catches fare drops early, before peak-season pricing sets in.
06
Book Early for Ski Season
December through February sees the highest average fares as Colorado ski travel peaks — book well ahead if your trip lines up with resort season.
Frequently Asked Questions
For winter travel, aim to book 3–5 weeks ahead as ski-season demand fills seats early. Shoulder-season trips have more flexibility.
Southwest and United together operate the majority of nonstop flights, with Frontier and Spirit adding budget-focused options.
United operates the most nonstop flights as part of its Denver hub network, with JetBlue close behind from its Boston focus city.
Basic Economy and ultra-low-cost fares are the most restrictive. United's standard fares and Southwest offer more flexibility; always check fare rules at checkout.
The Complete Guide
Everything to Know About Cheap Flights from Phoenix to Denver
A Busy, Competitively Priced Short-Haul
At just over 600 miles, Phoenix to Denver is one of the busiest Mountain West routes, with nearly 20 daily departures across four carriers. Demand and fares both rise through the winter as ski-season travel peaks.
What You’ll Actually Pay
One-way fares typically start around $39 and round-trips from $69, among the lower price points in this guide thanks to heavy competition. Prices rise through peak winter and ease in shoulder months.
Read the Fare Rules First
Frontier and Spirit’s ultra-low base fares often exclude checked bags, carry-ons, and seat selection. Tally those extras before comparing against United or Southwest.
Ready to Book Your Cheap Flight to Denver?
Compare Southwest, United, Frontier, and Spirit, lock in your PHX → DEN fare, and trade the desert for the mountains. No booking fees — ever.
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