💰 When is the cheapest time to fly from Phoenix to Denver?
We observed a roundtrip fare of $155 on July 24, 2026. Since only one data point is available, we cannot provide monthly pricing trends. Check current search results for up-to-date pricing.
Here's a month-by-month look at prices on this route:
✈️ Which airlines fly from Phoenix to Denver?
Our route check found one airline operating direct flights between Phoenix and Denver: Frontier Airlines. Always confirm current schedules and fares before booking.
Frontier Airlines dominates the Phoenix–Denver nonstop market as the only current direct carrier. Its ultra‑low‑cost model means you pay only for what you need—ideal for short hops with just a backpack.
The base fare we observed, $155 roundtrip, is competitive but can rise fast once bags and seat selections are added. Onboard, expect slimline seats and pay‑for‑everything service. For a 2‑hour flight, that’s tolerable.
If you need more amenities or loyalty perks, consider a connecting itinerary on a full‑service airline like United or Southwest, but those weren't observed as direct options. Still, Frontier’s schedule reliability is decent, and early morning or late‑night flights often have the best availability.
Bottom line: pack light, book directly on Frontier’s site to avoid hidden fees, and set a price alert.
Best for: budget-focused travelers who pack light and don't need frills.
Mubboo verdict: Frontier Airlines is the sole direct option on this route. It’s a solid budget choice—just pack light and book early.
Prices shown are approximate averages based on recent searches (April 2026). Actual fares vary by date, class, and availability.
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Compare all flights →📅 When should you book Phoenix to Denver flights?
Fares on this short domestic hop can swing quickly. We observed a $155 roundtrip on July 24, 2026, but prices may rise as seats fill. Since Frontier often charges for add‑ons like bags and seat selection, factor those costs into your comparison.
Book when you find a low base fare, and consider setting a price alert. Weekend and holiday flights tend to book up faster, so plan ahead if you’re traveling around Thanksgiving or the winter ski season.
If you're a family flying in summer, book by March — peak season fills up fast.
Budget travelers: shoulder season (Sep–Oct, Apr–May) offers the best balance of price and weather.
🎟️ Top activities in Denver
Ranked by traveler ratings and recent booking volume.
Guided Hiking Tour in the Beautiful Rocky Mountains
$65.00Wicked West: Historical Walking Adventure in Downtown Denver
$38.00Source: Viator · Prices in USD · Affiliate links.
☁️ Denver climate overview
Best: Mar, Apr, May, Sep, Oct, NovAvoid: JanHistorical highs, lows, and rainfall by month. Plan packing and outdoor time around the extremes.
Jan
35°/12°F
0.8″ rain
Feb
43°/19°F
1.0″ rain
Mar
60°/32°F
1.9″ rain
Apr
64°/36°F
0.9″ rain
May
71°/46°F
2.9″ rain
Jun
84°/55°F
2.4″ rain
Jul
91°/62°F
1.1″ rain
Aug
88°/61°F
2.3″ rain
Sep
80°/52°F
1.8″ rain
Oct
67°/42°F
1.1″ rain
Nov
59°/34°F
0.1″ rain
Dec
53°/27°F
0.6″ rain
Source: Open-Meteo Archive API · 2025 historical data · Updated June 2026
Ready to lock in your fare? Search live prices below:
✈️ Ready to book? Compare Phoenix to Denver flights
Search flights →🛫 Flying from Phoenix — airport tips
PHX Terminal 3 — Frontier Airlines (Frontier Airlines)
- Arrive early: TSA lines in Terminal 3 can be long, especially during morning peaks.
- Grab a bite at Barrio Café for a taste of Phoenix before you fly.
- Check your gate number ahead; some gates are in the South Concourse.
DEN Concourse A — Frontier Airlines (Frontier Airlines)
- Walk from the main terminal to Concourse A can take 10–15 minutes; use the train for faster access.
- Fill your water bottle at the hydration stations—high altitude increases dehydration.
- The Mesa Verde restaurant near Gate A26 is a solid option for a sit‑down meal.
💡 Insider tips: Phoenix to Denver
Pack light to avoid Frontier's add-on fees
Frontier charges for everything beyond a personal item. A carry‑on or checked bag can easily double your fare. Pack strategically with a backpack that fits under the seat. If you need a bag, pay online in advance—it's cheaper than at the airport.
Wear your bulkiest clothes and consider shipping items ahead if you're staying a while.
Fly midweek for the best base fare
Fares are usually lower on Tuesdays and Wednesdays. Weekend and Friday flights command premium pricing. Our observed fare on a weekday in late July was $155, but expect higher prices around holidays. Set flexible date alerts to catch the dips. If your schedule allows, avoid Sunday returns.
Rent a car off-airport to skip DEN's long lines
Denver International Airport rental counters often have long waits and upsells. After landing, consider taking an Uber to a nearby off‑airport rental location. Rates can be cheaper, and you'll avoid the toll transponder pressure. Always bring your own insurance proof to decline costly add‑ons.
Hydrate and go easy on day one for altitude
Denver's mile‑high elevation can cause headaches and fatigue. Drink plenty of water before and during your flight. Avoid heavy alcohol the first day. Take it slow if you're heading straight to the Rockies—give your body time to adjust. Over‑the‑counter altitude sickness remedies can help if you're prone.
⚖️ Flight delayed or canceled?
For domestic flights, DOT rules apply: if your flight is significantly delayed or canceled, you may be entitled to a refund if you choose not to travel, though compensation is not guaranteed. Frontier typically rebooks on its next available flight. Check Frontier’s contract of carriage for specifics.
What Travelers Are Saying About Denver
Based on recent discussions from r/travel, r/flights, and denver community subreddits • Updated June 2026
👍 What Travelers Love
- r/travel, r/solotravel, r/backpacking · 5 posts
Denver serves as an ideal gateway to the Rocky Mountains for hiking and backpacking adventures
— “flew into Denver just to get some hikes in for the scenery”
⚠️ Common Concerns
- r/solotravel, r/travel, r/TravelHacks · 4 posts
Renting a car in Denver is almost unavoidable, and airport agencies often surprise travelers with long waits, toll scams, and pushy insurance upsells
— “car rental at DIA was a nightmare of hidden tolls and endless lines”
💡 Trending Tips
- r/TravelHacks · 2 posts
Avoid Routes Car Rental at Denver Airport due to consistently dreadful service
— “steer clear of Routes at DIA no matter what”
- r/solotravel · 2 posts
Take Amtrak’s California Zephyr to Denver as a scenic, car-free travel alternative
— “rode the California Zephyr into Denver and never needed a rental”
Themes synthesized from public Reddit discussions. Quotes are paraphrased — never copied verbatim.
Frequently asked questions about Phoenix to Denver flights
Yes, Frontier Airlines offers nonstop flights between Phoenix Sky Harbor (PHX) and Denver International (DEN) as of our July 2026 observation. No other direct carriers were found, though connecting flights may be available on other airlines. Always check current schedules before booking.
Researched by Mubboo Editorial Team · Reviewed by Richard Lee, Founder
Prices from Aviasales. Seasonal advice updated: July 2026
Prices last updated just now · cached fares aggregating 800+ airlines and agencies · Check current prices →
M verdicts are based on editorial research — not pulled from a database.