$79 Cheap Southwest Airlines flights Phoenix (PHX) to Denver (DEN)

You can discover affordable round-trip Southwest Airlines flights from $154 from PHX to DEN by sorting your results from “Price (lowest to highest)” on Expedia. Or look for deals from $79 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Look for return or one-way flights to Denver in January or November. You could find a cheap fare with Southwest Airlines during these off-peak months.

To find cheap Southwest Airlines fares from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN), start searching one to three months before your intended departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also influence what you pay. Sunday is typically the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Southwest Airlines has direct flights from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN), with 75 departures every week. Just apply the “Nonstop” and “Airline” filters during your search on Expedia to see all direct Southwest Airlines flights to DEN.

From wheels-up to touchdown, a direct Southwest Airlines flight from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN) typically takes 1h 47m.

If you’re looking for flexibility, Wednesday offers the most choice for Southwest Airlines flights from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN). Take your pick of 13 different departures.

Departing PHX at 5:30AM UTC-7, the first Southwest Airlines flight to DEN lands at 7:15AM UTC-7. Traveling earlier in the day means you’re less likely to experience delays.* Not a morning person? The last Southwest Airlines flight from PHX to DEN departs at 9:10PM UTC-7 and touches down at 10:55PM UTC-7.*Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Denver Intl. Airport (DEN) is the primary Denver gateway for Southwest Airlines flights from Sky Harbor Intl. Airport (PHX).

Southwest Airlines typically flies Boeing 737-800 planes for flights from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN). This airline also operates the Boeing 737 MAX 8 on this route. Remember that aircraft type can vary depending on operational demands, so the plane you board might be different on the day you travel.

Changes are usually free within 24 hours of making your booking, but your airline may add a charge after that time. For more details about altering your flights, check out your “Trips,” select your flight and click on “Manage Booking.” If you want the flexibility to make changes without being charged, apply the “Changes included” or “No cancel fee” filter when organizing your next break.